Transistor BLF881
Transistor BLF881
1. Product profile
[1] Measured [dBc] with delta marker at 4.3 MHz from center frequency.
CAUTION
                     This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken
                     during transport and handling.
          1.2 Features
               2-Tone performance at 860 MHz, a drain-source voltage VDS of 50 V and a quiescent
                drain current IDq = 0.5 A:
                  Peak envelope power load power = 140 W
                  Power gain = 21 dB
                  Drain efficiency = 49 %
                  Third order intermodulation distortion = −34 dBc
               DVB performance at 858 MHz, a drain-source voltage VDS of 50 V and a quiescent
                drain current IDq = 0.5 A:
                  Average output power = 33 W
                  Power gain = 21 dB
                  Drain efficiency = 34 %
                  Shoulder distance = −33 dBc (4.3 MHz from center frequency)
               Integrated ESD protection
               Excellent ruggedness
               High power gain
NXP Semiconductors                                                                  BLF881; BLF881S
                                                                                            UHF power LDMOS transistor
                              High efficiency
                              Excellent reliability
                              Easy power control
                              Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances
                               (RoHS)
                     1.3 Applications
                          Communication transmitter applications in the UHF band
                          Industrial applications in the UHF band
2. Pinning information
                         Table 2.      Pinning
                         Pin              Description                              Simplified outline    Graphic symbol
                         BLF881 (SOT467C)
                         1                drain
                                                                                                                              1
                         2                gate                                              1
                         3                source                            [1]
                                                                                                     3
                                                                                                                     2
                                                                                                                              3
                                                                                            2                         sym112
                         BLF881S (SOT467B)
                         1                drain
                                                                                           1                                  1
                         2                gate
                         3                source                            [1]
                                                                                                 3
                                                                                                                     2
                                                                                                                              3
                                                                                           2                          sym112
3. Ordering information
                         Table 3.      Ordering information
                         Type number Package
                                           Name Description                                                                Version
                         BLF881            -          flanged LDMOST ceramic package; 2 mounting holes; 2 leads SOT467C
                         BLF881S           -          earless LDMOST ceramic package; 2 leads                              SOT467B
4. Limiting values
                                  Table 4.   Limiting values
                                  In accordance with the Absolute Maximum Rating System (IEC 60134).
                                  Symbol             Parameter                           Conditions                     Min          Max              Unit
                                  VDS                drain-source voltage                                               -            104              V
                                  VGS                gate-source voltage                                                −0.5         +13              V
                                  Tstg               storage temperature                                                −65          +150             °C
                                  Tj                 junction temperature                                               -            200              °C
5. Thermal characteristics
                                  Table 5.       Thermal characteristics
                                  Symbol          Parameter                                           Conditions                               Typ        Unit
                                  Rth(j-c)        thermal resistance from junction to case            Tcase = 80 °C;                [1]        0.95       K/W
                                                                                                      PL(AV) = 70 W
6. Characteristics
Table 6.    DC characteristics
Tj = 25 °C unless otherwise specified.
Symbol             Parameter                                     Conditions                                         Min         Typ            Max        Unit
V(BR)DSS           drain-source breakdown voltage                VGS = 0 V; ID = 1.35 mA                  [1]       104         -              -          V
VGS(th)            gate-source threshold voltage                 VDS = 10 V; ID = 1.35 mA                 [1]       1.4         -              2.4        V
IDSS               drain leakage current                         VGS = 0 V; VDS = 50 V                              -           -              1.4        μA
IDSX               drain cut-off current                         VGS = VGSth + 3.75 V; VDS = 10 V                   19          21             -          A
IGSS               gate leakage current                          VGS = 10 V; VDS = 0 V                              -           -              140        nA
RDS(on)            drain-source on-state resistance              VGS = VGSth + 3.75 V; ID = 4.5 A         [1]       -           210            -          mΩ
Ciss               input capacitance                             VGS = 0 V; VDS = 50 V; f = 1 MHz                   -           100            -          pF
Coss               output capacitance                            VGS = 0 V; VDS = 50 V; f = 1 MHz                   -           33.5           -          pF
Crss               reverse transfer capacitance                  VGS = 0 V; VDS = 50 V; f = 1 MHz                   -           1              -          pF
Table 7.    RF characteristics
Th = 25 °C unless otherwise specified.
Symbol              Parameter                                        Conditions                                 Min            Typ         Max            Unit
2-Tone, class AB
VDS                 drain-source voltage                                                                        -              50          -              V
IDq                 quiescent drain current                                                                     -              0.5         -              A
PL(PEP)             peak envelope power load power                                                              -              140         -              W
Gp                  power gain                                                                                  20             21          -              dB
ηD                  drain efficiency                                                                            45             49          -              %
IMD3                third-order intermodulation distortion                                                      -              −34         −30            dBc
BLF881_BLF881S_2                                                                                                                © NXP B.V. 2010. All rights reserved.
[1]   Measured [dBc] with delta marker at 4.3 MHz from center frequency.
[2]   PAR (of output signal) at 0.01 % probability on CCDF; PAR of input signal = 9.5 dB at 0.01 % probability on CCDF.
                                                                                                    001aal074
                                                           200
                                                         Coss
                                                         (pF)
                                                           160
120
80
40
                                                                0
                                                                    0      20      40         60              80
                                                                                                   VDS (V)
                                           VGS = 0 V; f = 1 MHz.
                                 Fig 1.    Output capacitance as a function of drain-source voltage; typical values
7. Application information
7.1.1 CW
                                                                                                             001aal075
                                                            23                                                           70
                                                          Gp                                                                ηD
                                                         (dB)                                                              (%)
                                                            22          Gp                                               60
21 50
                                                               20                                                        40
                                                                        ηD
19 30
18 20
17 10
                                                               16                                                      0
                                                                    0    40            80       120        160      200
                                                                                                              PL (W)
                                          VDS = 50 V; IDq = 0.5 A; measured in a common-source narrowband 860 MHz test circuit.
                                 Fig 2.   CW power gain and drain efficiency as function of load power; typical values
7.1.2 2-Tone
                                                  0001aal076                                                                          001aal077
          23                                                   70                       0
        Gp                                                        ηD
       (dB)            Gp                                        (%)
          22                                                   60                IMD3
                                                                                 (dBc)
           21                                                  50
                                                                                   −20
20 ηD 40
19 30
                                                                                   −40
           18                                                  20
17 10
           16                                               0                      −60
                0           40      80        120        160                                0         40          80             120        160
                                                PL(AV) (W)                                                                         PL(AV) (W)
                VDS = 50 V; IDq = 0.5 A; measured in a common-source                        VDS = 50 V; IDq = 0.5 A; measured in a common-source
                narrowband 860 MHz test circuit.                                            narrowband 860 MHz test circuit.
  Fig 3.        2-Tone power gain and drain efficiency as                     Fig 4.        2-Tone third order intermodulation distortion
                function of average load power; typical values                              as a function of average load power; typical
                                                                                            values
7.1.3 DVB-T
                                                    001aal078                                                                001aal079
          23                                                       70               0
        Gp                                                            ηD
                                                                             IMDshldr
       (dB)                                                          (%)
          22             Gp                                        60         (dBc)
                                                                                 −10
           21                                                      50
                                                                                 −20
           20                                                      40
                         ηD
           19                                                      30
                                                                                 −30
           18                                                      20
                                                                                 −40        (1)
           17                                                      10
                                                                                            (2)
           16                                                      0             −50
                0             30           60                 90                        0            30            60                   90
                                                PL(AV) (W)                                                              PL(AV) (W)
                VDS = 50 V; IDq = 0.5 A; measured in a common-source                    VDS = 50 V; IDq = 0.5 A; measured in a common-source
                narrowband 860 MHz test circuit.                                        narrowband 860 MHz test circuit.
                                                                                (1) Lower adjacent channel
                                                                                (2) Upper adjacent channel
  Fig 5.        DVB-T power gain and drain efficiency as                   Fig 6.       DVB-T shoulder distance as a function of
                function of average load power; typical values                          average load power; typical values
7.2.1 DVB-T
                                                       001aal080                                                               001aal081
           9.0                                                     50               25                                                        0
                                                                                Gp                                                            IMDshdr
       PAR                                                           ηD        (dB)                                                            (dBc)
       (dB)                                                         (%)             23                                                        −10
           8.0                                   PAR               40
                                                                                    21                      Gp                                −20
                                                 ηD                                 19                                                        −30
                                                                                                            IMDshdr
           7.0                                                     30
17 −40
           6.0                                                 20                   15                                                 −50
              400       500      600      700      800      900                       400       500      600      700      800      900
                                                      f (MHz)                                                                 f (MHz)
                 VDS = 50 V; IDq = 0.35 A; PL(AV) = 33 W; measured in a                  VDS = 50 V; IDq = 0.35 A; PL(AV) = 33 W; measured in a
                 common-source broadband test circuit as described in                    common-source broadband test circuit as described in
                 Section 8.                                                              Section 8.
  Fig 7.         DVB-T PAR at 0.01 % probability on the CCDF               Fig 8.        DVB-T power gain and shoulder distance as
                 and drain efficiency as function of frequency;                          function of frequency; typical values
                 typical values
7.4 Reliability
                                                                                                                               001aal082
                                   106
                               Years
105
103
102
                                   10
                                                               (7)       (8)    (9)    (10) (11)
                                    1
                                         0                           2                                   4                                 6
                                                                                                                 IDS(DC) (A)
8. Test information
Table 8.     List of components
For test circuit, see Figure 10, Figure 11 and Figure 12.
Component              Description                                    Value                       Remarks
C1, C2                 multilayer ceramic chip capacitor              5.1 pF                [1]
C8, C9, C10, C25, multilayer ceramic chip capacitor 100 pF [1]
C26
C11, C27               multilayer ceramic chip capacitor              10 μF                       TDK C570X7R1H106KT000N or
                                                                                                  capacitor of same quality.
C12                    electrolytic capacitor                         470 μF; 63 V
C20                    multilayer ceramic chip capacitor              10 pF                 [3]
L1                     stripline                                      -                     [4]   (W × L) 7 mm × 15 mm
L2                     stripline                                      -                     [4]   (W × L) 2.4 mm × 9 mm
L3                     stripline                                      -                     [4]   (W × L) 2.4 mm × 10 mm
L4                     stripline                                      -                     [4]   (W × L) 2.4 mm × 25 mm
L5                     stripline                                      -                     [4]   (W × L) 2.4 mm × 10 mm
L6                     stripline                                      -                     [4]   (W × L) 2.0 mm × 20 mm
L7                     stripline                                      -                     [4]   (W × L) 2.0 mm × 21 mm
L20                    stripline                                      -                     [4]   (W × L) 7 mm × 12 mm
L21                    stripline                                      -                     [4]   (W × L) 2.4 mm × 13 mm
L22                    stripline                                      -                     [4]   (W × L) 2.4 mm × 31 mm
L23                    stripline                                      -                     [4]   (W × L) 2.4 mm × 5 mm
R1                     resistor                                       100 Ω
R2                     resistor                                       10 kΩ
                                                                                                                                                                                                                                                           NXP Semiconductors
                                                                                                                                      VGG
                                                                                                                                 R2
                                                                                                                                                              C11        C12
                                                                                                                             C27
                                                                                                                                                                               VDD
                                                                                                                             C26
                                                                                                                                                        C9
Rev. 02 — 10 February 2010
                                                                                                                                        R1
                                                                                                                                                   L6
C20 C1 C3
                                                                            50 Ω   C25   L23                                                                                                                 C8      50 Ω
                                                                                                               L22          L21              L20         L1              L2         L3        L4        L5
L7
                                                                                                                                                                                                                                                           BLF881; BLF881S
                                                                                                                                                    C10
                                                                                                                                                                                                                  001aaj288
76.2 mm
                       40 mm                                             40 mm
                                                                                           001aaj289
Fig 11. Printed-Circuit Board (PCB) for class-AB common source amplifier
R2 C11
C9
                                                                                                    C12
                                                 C27
L6
C26
                                               R1
                                                                                   C1          C3
C20
                                                                                                                         L5
                                                                          L7
                                                                                                          C6
                                   L23
                                                                                                                                   C7
                                                                                   C10
                                                                                                               L4
001aaj290
9. Package outline
                                 A
                                                                                                      F
                                                                        3
                                                                   D1
                                                                   U1                                 B
                                                                   q                          C                               c
                                                                                                                      E1
                           H     U2                                                                                                           E
A p w1 M A M B M
b w2 M C M Q
0 5 10 mm
scale
DIMENSIONS (millimetre dimensions are derived from the original inch dimensions)
UNIT A b c D D1 E E1 F H p Q q U1 U2 w1 w2
         mm        4.67   5.59    0.15      9.25    9.27   5.92    5.97      1.65   18.54     3.43   2.21           20.45    5.97
                                                                                                            14.27                     0.25   0.51
                   3.94   5.33    0.10      9.04    9.02   5.77    5.72      1.40   17.02     3.18   1.96           20.19    5.72
                   0.184 0.220 0.006        0.364 0.365    0.233   0.235 0.065      0.73      0.135 0.087       0.805 0.235
         inch                                                                                             0.562             0.010 0.020
                   0.155 0.210 0.004        0.356 0.355    0.227   0.225 0.055      0.67      0.125 0.077       0.795 0.225
                                                                                                                                                     99-12-06
            SOT467C
                                                                                                                                                     99-12-28
                                                A
                                                                                               F
                                                                      3
                                                                      D1                      D
                                                                      U1                                                    c
                                                                       1
E1
H U2 E
                                                                       2
                                                                       b               w2          A               Q
0 5 10 mm
Dimensions scale
Unit(1) A b c D D1 E E1 F H L Q U1 U2 w2
             max 4.67 5.59      0.15    9.25         9.27   5.92    5.97   1.65 18.29 2.92         2.21    9.78    5.97
      mm     nom                                                                                                          0.25
             min 3.94 5.33      0.10    9.04         9.02   5.77    5.72   1.40 17.27 2.16         1.96    9.53    5.72
            max 0.184 0.22 0.006 0.364 0.365 0.233 0.235 0.065 0.72 0.115 0.087 0.385 0.235
     inches nom                                                                             0.01
            min 0.155 0.21 0.004 0.356 0.355 0.227 0.225 0.055 0.68 0.085 0.077 0.375 0.225
     Note
     1. millimeter dimensions are derived from the original inch dimensions.                                                                                  sot467b_po
10. Abbreviations
                              Table 9.       Abbreviations
                               Acronym                       Description
                               CW                            Continuous Wave
                               CCDF                          Complementary Cumulative Distribution Function
                               DVB                           Digital Video Broadcast
                               DVB-T                         Digital Video Broadcast - Terrestrial
                               ESD                           ElectroStatic Discharge
                               HF                            High Frequency
                               IMD3                          Third order InterModulation Distortion
                               LDMOS                         Laterally Diffused Metal-Oxide Semiconductor
                               LDMOST                        Laterally Diffused Metal-Oxide Semiconductor Transistor
                               OFDM                          Orthogonal Frequency Division Multiplexing
                               PAR                           Peak-to-Average power Ratio
                               PEP                           Peak Envelope Power
                               RF                            Radio Frequency
                               TTF                           Time To Failure
                               UHF                           Ultra High Frequency
                               VSWR                          Voltage Standing-Wave Ratio
[1]   Please consult the most recently issued document before initiating or completing a design.
[2]   The term ‘short data sheet’ is explained in section “Definitions”.
[3]   The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
      information is available on the Internet at URL http://www.nxp.com.
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
                                                                                 12.4 Trademarks
NXP Semiconductors’ specifications such use shall be solely at customer’s        Notice: All referenced brands, product names, service names and trademarks
own risk, and (c) customer fully indemnifies NXP Semiconductors for any          are the property of their respective owners.
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
14. Contents
1       Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1       General description . . . . . . . . . . . . . . . . . . . . . 1
1.2       Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3       Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2       Pinning information . . . . . . . . . . . . . . . . . . . . . . 2
3       Ordering information . . . . . . . . . . . . . . . . . . . . . 2
4       Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 3
5       Thermal characteristics . . . . . . . . . . . . . . . . . . 3
6       Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7       Application information. . . . . . . . . . . . . . . . . . . 5
7.1       Narrowband RF figures . . . . . . . . . . . . . . . . . . 5
7.1.1     CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1.2     2-Tone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1.3     DVB-T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.2       Broadband RF figures . . . . . . . . . . . . . . . . . . . 7
7.2.1     DVB-T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.3       Ruggedness in class-AB operation . . . . . . . . . 7
7.4       Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8       Test information . . . . . . . . . . . . . . . . . . . . . . . . . 9
9       Package outline . . . . . . . . . . . . . . . . . . . . . . . . 13
10      Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11      Revision history . . . . . . . . . . . . . . . . . . . . . . . . 15
12      Legal information. . . . . . . . . . . . . . . . . . . . . . . 16
12.1      Data sheet status . . . . . . . . . . . . . . . . . . . . . . 16
12.2      Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12.3      Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12.4      Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 17
13      Contact information. . . . . . . . . . . . . . . . . . . . . 17
14      Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
                                                                                     Please be aware that important notices concerning this document and the product(s)
                                                                                     described herein, have been included in section ‘Legal information’.