PA93
PA93
PA93
High Voltage Power Operational Amplifiers
FEATURES
DESCRIPTION
The PA93 is a high voltage, low quiescent current
MOSFET operational amplifier designed as a low cost
solution for driving continuous output currents up to 8A
and pulse currents up to 14A. The safe operating area
(SOA) has no second breakdown limitations and can
be observed for all type loads by choosing an appropriate current limiting resistor. The MOSFET output stage
is biased AB for linear operation. External compensation provides flexibility in choosing bandwidth and slew
rate for the application. Apex Microtechnologys Power
SIP package uses a minimum of board space allowing
for high density circuit boards. The Power SIP package
is electrically isolated.
HIGH VOLTAGE 400V (200V)
LOW QUIESCENT CURRENT 10mA
HIGH OUTPUT CURRENT 8A
PROGRAMMABLE CURRENT LIMIT
APPLICATIONS
PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC TRANSDUCERS
PROGRAMMABLE POWER SUPPLIES UP
TO 390V
EQUIVALENT SCHEMATIC
12
11
+VS
R1 R2
Q1
C1
Q3
Q2
Q6
4
CC1
Q5
Q14A
1
IN
R3
R4
5
CC2
ILIM
9
Q8
Q14B
R7
R8
R9
Q12
6
OUT
Q13
3
IQ
2
+IN
R10
Q18
Q16
Q15
R11
VS
7
10
Q11
R6
R5
Q4
R12
EXTERNAL CONNECTIONS
1
4
Rc
IN
10
11
Cc
RCL
+IN
*
IQ
TO LOAD
(See IQ Reduction.) AND FEEDBACK
www.apexanalog.com
PA93U
12
Vs
+Vs
* Bypassing required.
PATENTED
12-pin SIP
PACKAGE
STYLE DP
Formed leads available
See package style EE
Copyright Apex Microtechnology, Inc. 2012
(All Rights Reserved)
FEB 2015
1
PA93U REVR
PA93
1. CHARACTERISTICS AND SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Units
SUPPLY VOLTAGE, +VS to -VS
400
OUTPUT CURRENT, source, sink, peak, within SOA
14
POWER DISSIPATION, continuous @ TC = 25C
125
INPUT VOLTAGE, differential
-20
20
INPUT VOLTAGE, common mode
-VS
VS
TEMPERATURE, pin solder, 10s max.
260
TEMPERATURE, junction (Note 2)
150
TEMPERATURE RANGE, storage
55
125
OPERATING TEMPERATURE RANGE, case
40
85
CAUTION
The PA93 is constructed from MOSFET transistors. ESD handling procedures must be observed.
The exposed substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures
in excess of 850C to avoid generating toxic fumes.
SPECIFICATIONS
Parameter
Test Conditions1
Min
Typ
Max
Units
10
mV
15
50
V/C
OFFSET VOLTAGE vs. supply
10
25
OFFSET VOLTAGE vs. time
75
BIAS CURRENT, initial
200
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE vs. temperature
Full temperature range
BIAS CURRENT vs. supply
OFFSET CURRENT, initial
50
INPUT IMPEDANCE, DC
10
INPUT CAPACITANCE
11
COMMON MODE VOLTAGE RANGE
(Note 3)
Vs 15
COMMON MODE REJECTION, DC
VCM = 90V
NOISE
100 kHz BW, RS = 1 k,
CC = 10pF
80
V/V
V/kh
2000
pA
pA/V
500
pA
pF
V
98
dB
V RMS
111
dB
GAIN
OPEN LOOP @ 15 Hz
RL = 2 k, CC = 10pF
94
GAIN BANDWIDTH PRODUCT @ 1 MHz
RL = 2 k, CC = 10pF
12
MHz
POWER BANDWIDTH
RL = 2 k, CC = 10pF
30
kHz
PHASE MARGIN
Full temp range
60
VS 10
50
V/s
OUTPUT
VOLTAGE SWING
(Note 3)
IO = 8A
CURRENT, continuous
SLEW RATE, A V = 100
CC = 10pF
CAPACITIVE LOAD, A V = +1
Full temp range
VS 12
A
nF
PA93U
PA93
Parameter
Test Conditions1
SETTLING TIME to 0.1%
Min
Typ
CC = 10pF, 2V step
RESISTANCE, no load
Max
Units
10
POWER SUPPLY
VOLTAGE (Note 5)
40
150
200
10
14
mA
CURRENT, quiescent
THERMAL
RESISTANCE, AC, junction to case
(Note 4)
Full temp range, F > 60 Hz
0.7
C/W
RESISTANCE, DC, junction to case
Full temp range, F < 60 Hz
C/W
RESISTANCE, junction to air
Full temp range
TEMPERATURE RANGE, case
Meets full range specifications
30
C/W
-25
+85
NOTES: 1. Unless otherwise noted: TC = 25C, DC input specifications are value given. Power supply voltage
is typical rating. RC = 100 CC = 220pF.
2. Long term operation at the maximum junction temperature will result in reduced product life. Derate
internal power dissipation to achieve high MTTF.
3. +VS and VS denote the positive and negative power supply rail respectively.
4. Rating applies if the output current alternates between both output transistors at a rate faster than
60 Hz.
5. Derate max supply rating 0.625 V/C below 25C case. No derating needed above 25C case.
TYPICAL APPLICATION
RF
LOW POWER, PIEZOELECTRIC POSITIONING
+VS
Piezo positioning may be applied to the focusing of segmented
mirror systems. The composite mirror may be composed of
hundreds of elements, each requiring focusing under computer
control. In such complex systems the PA93 reduces the costs
of power supplies and cooling with its advantages of low cost
and low quiescent power consumption while increasing circuit
density with the SIP package.
R IN
COMPUTER
FOCUS
COMMAND
VOLTAGE
7,8
270
100k
25
50
75
100
125
CASE TEMPERATURE, TC (C)
N LOOP GAIN, A (dB)
40
30
PA93U
20
10
CC = 220pF
CC = 100pF
CC = 47pF
CC = 10pF
OP FROM SUPPLY, VS VO (V)
SMALL SIGNAL RESPONSE
50
CC = 220pF
CC = 100pF
CC = 47pF
CC = 10pF
225
25
0
180
1M
10M
FREQUENCY F (Hz)
R CL
1.8
1.6
1.4
1.2
1.0
25
OUTPUT VOLTAGE SWING
75
125
50
100
CASE TEMPERATURE, TC (C)
POWER RESPONSE
400
UT VOLTAGE, VO (VP-P)
50
9,10
NORMALIZED QUIES. CURRENT
NORMALIZED QUIESCENT CURRENT, IQ (X)
135
75
V OUT
V S
PHASE RESPONSE
100
90
PHASE, ()
INTERNAL POWER DISSIPATION, P (W)
POWER DERATING
PIEZO DRIVE
PA93
TYPICAL PERFORMANCE GRAPHS
125
11,12
100
CC = 10pF
CC = 47pF
50
180
CC = 220pF
CC = 100pF
CC = 47pF
CC = 10pF
225
25
PA93
0
270
100k
25
50
75
100
125
CASE TEMPERATURE, TC (C)
CC = 220pF
CC = 100pF
CC = 47pF
CC = 10pF
40
30
20
10
0
10
100K
1M
10M
FREQUENCY, F (Hz)
4
2
6
OUTPUT CURRENT, IO (A)
PO = 1W
PO = 20W
PO = 62W
DISTORTION, (%)
4
3
100
.01
2
1
10
20 30 40 60 100
200 300
EXT. COMPENSATION CAPACITOR, CC (pF)
.001
75
125
50
100
CASE TEMPERATURE, TC (C)
CC = 100pF
CC = 220pF
10
1K
100
1K
FREQUENCY, F (Hz)
10K
CC = 10pF
CC = 47pF
10K
100K
FREQUENCY, F (Hz)
1M
INPUT NOISE VOLTAGE
HARMONIC DISTORTION
40
30
SLEW RATE, (V/s)
0.1
10
8
6
1.0
25
POWER RESPONSE
SLEW RATE
60
20
1.2
400
1.4
OUTPUT VOLTAGE SWING
INPUT NOISE VOLTAGE, VN (nVHz)
OPEN LOOP GAIN, A (dB)
VOLTAGE DROP FROM SUPPLY, VS VO (V)
SMALL SIGNAL RESPONSE
50
1M
10M
FREQUENCY F (Hz)
OUTPUT VOLTAGE, VO (VP-P)
NORMALIZED QUIESCENT CU
PHASE, ()
INTERNAL POWER DISSIP
75
20
15
10
7
5
3
2
10
100
1K
10K
FREQUENCY, F (Hz)
100K
CURRENT LIMIT
CURRENT LIMIT, ILIM (A)
PHASE COMPENSATION
6
GAIN CC* RC
1
220pF 100
2
100pF 100
4
47pF
0
17
10pF
0
*CC
Never to be <10pF. CC to be rated for the full supply
voltage +VS to -VS. Use ceramic NPO (COG) type.
.1
.4
.2
.3
.5
.6
RESISTOR VALUE, RCL ()
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexanalog.com for Apex
Microtechnologys complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits.
CURRENT LIMIT
For proper operation, the current limit resistor (RCL) must be connected as shown in the external connection diagram. For optimum reliability the resistor value should be set as high as possible. The value is calculated as follows;
with the maximum practical value of 16 ohms.
0.65V
RCL =
ILIM(A)
PA93U
PA93
SAFE OPERATING AREA (SOA)
SAFE OPERATING CURVES
The safe operating area curves define the maximum additional internal power dissipation the amplifier can tolerate when it produces the necessary output to drive an
external load.
INPUT PROTECTION
20
OUTPUT CURRENT FROM +VS OR VS, (A)
The MOSFET output stage of this power operational amplifier has two distinct limitations:
1. The current handling capability of the MOSFET geometry and the wire bonds.
2. The junction temperature of the output MOSFETs.
NOTE: The output stage is protected against transient
flyback. However, for protection against sustained, high
energy flyback, external fast-recovery diodes should be
used.
SOA
DC, TC = 25C
10
8
6
200mS
4
3
10
0m
DC
,T
1
.8
.6
DC
,T
.4
.3
=1
=8
5C
25
.2
.1
.08
.06
10
Although the PA93 can withstand differential voltages up
20 30 40 60 80 100
200 300 500
to 20V, additional external protection is recommended.
SUPPLY TO OUTPUT DIFFERENTIAL, VS VO (V)
Low leakage, low capacitance JFETs connected as diodes are recommended (e.g. 2N4416, Q1-Q4 in Figure 2). The differen+VS
tial input voltage will be clamped to 1.4V. This is sufficient overdrive to
Z1
produce maximum power bandwidth.
POWER SUPPLY PROTECTION
IN
11, 12
Q1
Q3
Unidirectional zener diode transient suppressors are recommended as
6
PA93
protection on the supply pins. See Figure 2. The zeners clamp transients
Q2
Q4
to voltages within the power supply rating and also clamp power supply +IN
7, 8
2
reversals to ground. Whether the zeners are used or not, the system
power supply should be evaluated for transient performance including
Z2
FIGURE 2.
power-on overshoot and power-off polarity reversals as well as line regu- OVERVOLTAGE
VS
PROTECTION
lation.
Conditions which can cause open circuits or polarity reversals on either
power supply rail should be avoided or protected against. Reversals or opens on the negative supply rail is known
to induce input stage failure. Unidirectional transzorbs prevent this, and it is desirable that they be both electrically
and physically as close to the amplifier as possible.
STABILITY
The PA93 is externally compensated and performance can be tailored to the application. Use the graphs of small
signal response and power response as a guide. The compensation capacitor CC must be rated at 500V working
voltage. An NPO capacitor is recommended. The compensation network CCRC must be mounted closely to the amplifier pins 4 and 5 to avoid spurious oscillation.
QUIESCENT CURRENT REDUCTION
When pin 3 (IQ) is shorted to pin 5 (CC2) the AB biasing of the output stage is disabled. This lowers quiescent power
but also raises distortion since the output stage is then class C biased. The output stage bias current is nominally
set at 1mA. Pin 3 may be left open if not used.
PA93U
PA93
NEED TECHNICAL HELP? CONTACT APEX SUPPORT!
For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact apex.support@apexanalog.com.
International customers can also request support by contacting their local Apex Microtechnology Sales Representative.
To find the one nearest to you, go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change
without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further
notice to any specifications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not
extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR
LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMERS RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks
of their respective holders.
6
www.apexanalog.com
Copyright Apex Microtechnology, Inc. 2012
(All Rights Reserved)
FEBPA93U
2015
PA93U REVR
