JlA776

MULTI-PURPOSE PROGRAMMABLE OPERATIONAL AMPLIFIER

FAIRCHILD LINEAR INTEGRATED CIRCUITS

DESCRIPTION - The IJA776 Programmable Operational Amplifier is constructed using the Fairchild
Planar' epitaxial process. High input impedance, low supply currents, and low input noise over a wide CONNECTION DIAGRAMS
range of operating supply voltages coupled with programmable electrical characteristics result in an a-PIN METAL CAN
extremely versatile amplifier for use in high accuracy, low power consumption analog applications. (TOP VIEW)
Input noise voltage and cJJrrent, power consumption, and input current can be optimized by a single PACKAGE OUTLINE 5S
resistor or current source that sets the chip quiescent current for nana-watt power consumption or for PACKAGE CODE H
characteristics similar to the IJA741. Internal frequency compensation, absence of latch·up, high slew ISET
rate and short circuit current protection assure ease of use in long time integrators, active filters, and
sample and hold circuits.
• MICROPOWER CONSUMPTION • HIGH SLEW RATE
• ±l.2V to ±lav OPERATION • LOW NOISE
• NO FREQUENCY COMPENSATION REQUIRED • SHORT CIRCUIT PROTECTION -IN >--"{) OUT
• LOW INPUT BIAS CURRENTS • OFFSET NULL CAPABILITY
• WIDE PROGRAMMING RANGE • NO LATCH-UP
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ±18 V v-
Internal Power Dissipation (Note 1) ORDER INFORMATION
Metal Can SOOmW TYPE PART NO.
DIP 670mW iJ.A776 iJ.A776HM
Mini DIP 310mW iJ.A776C iJ.A776HC
Differential Input Voltage ±30V
14-PIN DIP
Input Voltage (Note 2) ±1SV
(TOP VIEW)
Voltage Between Offset Null and V- ±O.S V
PACKAGE OUTLINE 6A
ISET (Maximum Current at ISET) SOOIJA
PACKAGE CODE D
VSET (Maximum Voltage to Ground at ISET) (V+ -2.0 V) .. VSET .. V+
Storage Temperature Range NC NC

Metal Can, DIP -6S0C to +1S0°C

Mini DIP -SSoC to +12SoC NC NC

Operating Temperature Range OFFSET

Military (/LA776) -SSoC to +12SoC NULL 'SET
Commercial (IJA776C) O°C to +70°C
-IN v+
Pin Temperature (Soldering, 60 s)
Metal Can, DIP 300°C
+IN OUT
Mini DIP 260°C
Output Short Circuit Duration (Note 3) Indefinite OFFSET
v- NULL

NC NC

EQUIVALENT CIRCUIT
ORDER INFORMATION
TYPE PART NO.
v+ iJ.A776 iJ.A776DM
a" /LA776 IJA776DC

a·PIN MINI DIP

(TOP VIEW)
A.
PACKAGE OUTLINE 9T
soo
PACKAGE CODE T

A,
loon OFFSET
NULL 'SET
OUTPUT
A, "6
loon
-IN v+
lOon
+IN OUT

As
soo v-
OFFSET
NULL
0,.

ORDER INFORMATION
010 TYPE PART NO.
v- IJA776C IJA776TC

"Planar is a patented Fairchild process.

5-156
 FAIRCHILD • JLA776
±15 V OPERATION FOR Jl.Ana
ELECTRICAL CHARACTERISTICS: TA = 25'C, unless otherwise specified.

ISET = 1.5"A ISET = 15"A

CHARACTERISTICS CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

Input Offset Voltage RS';10k!1 2.0 5.0 2.0 5.0 mV

Input Offset Current R~10k!1 0.7 3.0 2.0 15 nA
Input Bias Current 2.0 7.5 15 50 nA
Input Resistance 50 5.0 M!1
I nput Capacitance 2.0 2.0 pF
Offset Voltage Adjustment Range 9.0 18 mV

RL;;>75k!1, VOUT =±10V 200k 400k V/V

Large Signal Voltage Gain
RL;;>5k!1, VOUT =±10V 100k 400k V/V
Output Resistance 5.0k 1.0k !1

Output Short-Circuit Current 3.0 12 mA

Supply Current 20 25 160 180 "A
Power Consumption 0.75 5.4 mW

Transient Response

•
VIN = 20mV, RL;;> 5kH,
Rise Time 1.6 0.35 ItS
(unity gain) CL = 100pF
Overshoot 0 10 %
Slew Rate RL;;>5k!1 0.1 0.8 V/"s
RL;;>75k!1 ±12 ±14 V
Output Voltage SWing
RL;;>5k!1 ±10 ±13 V

The following specifications apply -55°C';T A'; +125°C

Input Offset Voltage RS';10k!1 6.0 6.0 mV

TA = +125°C 5.0 15 nA
I nput Offset Current
T.". = _55°C 10 40 nA
TA=+125°C 7.5 50 nA
Input Bias Current
TA = _55°C 20 120 nA
Input Voltage Range ±10 ±10 V
Common Mode Rejection Ratio RS';10k!1 70 90 70 90 dB
Supply Voltage Rejection Ratio RS';10k!1 25 150 25 150 "V/V
Large Signal Voltage Gain RL;;>75k!1, VOUT=±10V 100k 75k V/V
Output Voltage Swing RL;;>75k!1 ±10 ±10 V
Supply Current 30 200 "A
Power Consumption 0.9 6.0 mW

5-157
 FAIRCHILD • /LA776
±3 V OPERATION FOR !lA776

ELECTRICAL CHARACTERISnCS: TA = 25°C. unless otherwise specified.

ISET = 1.5/lA ISET = 15"A

CHARACTERISTICS CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

Input Offset Voltage RS .. l0k.fl 2.0 5.0 2.0 5.0 mV

Input Offset Current 0.7 3.0 2.0 15 nA
Input Bias Current 2.0 7.5 15 50 nA
Input Resistance 50 5.0 M.fl
Input Capacitance 2.0 2.0 pF
Offset Voltage Adjustment Range 9.0 18 mV
RL"75k.fl. VOUT=±lV 50k 200k V/V
Large Signal Voltage Gain
RL"5k.fl. VOUT=±lV 50k 200k V/V
Output Resistance 5k lk .fl
Output Short-Circuit Current 3.0 5.0 rnA
Supply Current 13 20 130 160 "A
Power Consumption 78 120 780 960 "W
Transient Response VIN = 20mV. RL " 5k.fl.
Rise Time 3.0 0.6 ILS
(unity gain) CL" 100pF
Overshoot 0 5 %
Slew Rate RL"5k.fl 0.03 0.35 V/"s
.. 0
The follOWIng specIfIcatIons apply for -55 ° C .. T A" +125 C
I nput Offset Voltage RS .. l0k.fl 6.0 6.0 mV
TA = +125°C 5.0 15 nA
Input Offset Current
TA=-55°C 10 40 nA
TA =+125°C 7.5 50 nA
I nput Bias Current
TA=-55°C 20 120 nA
Input Voltage Range ±1.0 ±1.0 V
Common Mode Rejection Ratio RS .. l0k.fl 70 86 70 86 dB
Supply Voltage Rejection Ratio RS .. l0k.fl 25 150 25 150 "V/V
RL"75k.fl. VOUT=±lV 25k V/V
Large Signal Voltage Gain
RL"5k.fl. VOUT=±lV 25k V/V
RL"75k.fl ±2.0 ±2.4 V
Output Voltage Swing
RL"5k.fl ±1.9 ±2.1 V
Supply Current 25 180 "A
Power Consumption 150 1080 "W

NOTES:
1. Rating applies to ambient temperatures up to 70°C. Above 70°C ambient derate linearly at 6.3 mW/C for Metal Can, 8.3 rnW/C for the
DIP, and 5.6 mW/C for the Mini DIP.
2. For supply voltages less than ± 15 V. the absolute maximum input voltage is equal to the supply voltage.
3. Short Circuit may be to ground or either supply. Rating applies to +125°C case temperature or +7SoC ambient temperature for
ISET .. 30 "A.

5-158
 FAIRCHILD • ILA776
±15 V OPERATION FOR /lA776e

ELECTRICAL CHARACTERISTICS: TA = 25"C, unless otherwise specified.

ISET = 1.5/LA ISET= 15/LA

CHARACTER ISTICS CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

Input Offset Voltage RS';10kil 2.0 6.0 2.0 6.0 mV

Input Offset Current 0.7 6.0 2.0 25 nA
Input Bias Current 2.0 10 15 50 nA
Input Resistance 50 5.0 Mil
Input capacitance 2.0 2.0 pF
Offset Voltage Adjustment Range 9.0 18 mV
RL;;>75kil, VOUT-±10V 50k 400k VIV
Large Signal Voltage Gain
RL;;>5kil, VOUT=±10V 50k 400k VIV
Output Resistance 5.0 1.0 kil
Output Short-Circuit Current 3.0 12 mA
Supply Current 20 30 160 190 !LA
Power Consumption 0.9 5.7 mW

•
Transient Response Y,N = 20mV, RL;;> 5kil,
Rise Time 1.6 0.35 !JS
(unity gain) CL'; 100pF
Overshoot 0 10 %
Slew Rate RL;;>5kil 0.1 0.8 V/!Js
RL;;>75kil ±12 ±14 V
Output Voltage Swing
RL;;>5kil ±10 ±13 V
The following specifications apply to O°C.;TA'; +70°C
Input Offset Voltage RS<10kil 7.5 7.5 mV
TA=+70°C 6.0 25 nA
I nput Offset Current .... ....0 ....
IA -v v 'u 40 r:.I1.~

TA =+70°C 10 50 nA
Input Bias Current
TA = O°C 20 100 nA
Input Voltage Range ±10 ±10 V
Common Mode Rejection Ratio RS.;10kil 70 90 70 90 dB
Supply Voltage Rejection Ratio RS<10kil 25 200 25 200 /LVN
Large Signal Voltage Gain RL;;>75kil, VOUT-±10V 50k 50k VIV
Output Voltage Swing RL;;>75kil ±10 ±10 V

Supply Current 35 200 !LA

Power Consumption 1.05 6.0 mW

5-159
 FAIRCHILD • /LA776
±3 V OPERATION FOR /lA776e

ELECTRICAL CHARACTERISTICS: TA = 25°C, unless otherwise specified.

ISET = 1.5/tA ISET = 15/tA

CHARACTERISTICS CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

Input Offset Voltage RS';10kn 2.0 6.0 2.0 6.0 mV

Input Offset Current 0.7 6.0 2.0 25 nA
Input Bias Current 2.0 10 15 50 nA
Input Resistance 50 5.0 Mn
Input Capacitance 2.0 2.0 pF
Offset Voltage Adjustment Range 9.0 18 mV

RL>75kn, VOUT=±lV 25k 200k V/V

Large Signal Voltage Gain
RL>5kn, VOUT=±lV 25 k 200k V/V
Output Resistance 5.0 1.0 kn
Output Short-Circuit Current 3.0 5.0 mA
Supply Current 13 20 130 170 p.A
Power Consumption 78 120 780 1020 p.W

Transient Response VIN = 20mV, RL > 5kn,

Rise Time 3.0 0.6 p.s
(unity gain) CL= 100pF
Overshoot 0 5 %
Slew Rate RL>5kn 0.03 0.35 V/p.s
The following specifications apply for O°C';T A';+70°C
Input Offset Voltage RS';10kn 7.5 7.5 mV
TA=+70°C 6.0 25 nA
I nput Offset Current
TA = O°C 10 40 nA
TA=+70°C 10 50 nA
I nput Bias Current
TA = OOC 20 100 nA
Input Voltage Range ±1.0 ±1.0 V
Common Mode Rejection Ratio RS.;10kn 70 86 70 86 dB
Supply Voltage Rejection Ratio RS';10kn 25 200 25 200 p.V/v
RL>75kn,VOUT=±lV 25k V/v
Large Signal Voltage Gain
RL>5kn, VOUT=±lV 25k V/V
RL>75kn ±2.0 ±2.4 V
Output Voltage Swing
RL>5kn ±2.0 ±2.1 V
Supply Current 25 180 p.A
Power Consumption 150 1080 p.W

5-160
 FAIRCHILD • JLA776
TYPICAL PERFORMANCE CURVES FOR MA77S AND MA77SC

INPUT BIAS CUR RENT INPUT BIAS CURRENT INPU:r OFFSET CURRENT
AS A FUNCTION OF AS A FUNCTION OF AS A FUNCTION OF
SET CURRENT AMBIENT TEMPERATURE AMBIENT TEMPERATURE
0 ,
TA zsoc I L I !:3.oV<V S5 tl8V
~\;
! 1
1
!c3.0.V 5V S 5 tl~V

'3,OV <Vs < '18V tt--t--HiH-1'1+i-i

IOH-ttI-++Ht-+++tt--;I'i/'-t-Ht--1 ~ 1'-.,' 1
\
8 3
-/--
,"'-
, ~
J5)JA 1

, :~~r15"A
v .

~ I~ ~ ~
,1---.., IISET-UIJA
1

'--+- [-t---- -f-- 1 -':-

~jJAI
. I
rr~
, ,
. 1'--

o ' 0 i
-50 -1<J 1<J 60 '00 140 -60 -1<J 10 60 ,00 140
I sn "SfTCURRENT-IiA TEMPERATURE -"C TEMPERATUR~ - "c

CHANGE IN INPUT OFFSET

CHANGE IN INPUT OFFSET VOLTAGE AS A FUNCTION INPUT NOISE VOLTAGE
VOLTAGE AS A FUNCTION OF AMBIENT TEMPERATURE AS A FUNCTION OF
OF SET CURRENT (UNNULLED) SET CURRENT
500
i . ,! I III i !I 'OIl

TA 25"C
I !s·,l,v l-
~ 300 +3.OV~VS<!l8V- IstT"15~

•
"

~
> ,00
l'li. VI' N-

~ 10- 14 f------t----"'''<l---+-----i
~5 i 'k /' ~
~
~ -100
I
I I
"'-.t
1"'4
i
V ~

~
IO-151---_--+_ _ + __ """".~

~
./ ~
~ -300
I hl V ;E 1O-16 f------t--+-_+-_---1
I I I! Ii N
-, I I I I I II -300
'0" I;'
10 'OIl -60 -20 10 100 140 0.01 100
I sn -SETCURRENT-IoiA TEMPERATURE·OC I SET -SETCURRENT-IlA

!~~!.!T
!'JQ!SE VOl "!"_~G~ A!':!~ I NPIIT NOI!':F CIIRRFNT OPTIMUM SOURCE RESISTOR
CURRENT AS A FUNCTION AS A FUNCTION OF FOR MINIMUM NOISE AS A
OF FREQUENCY SET CURRENT FUNCTION OF SET CURRENT

10 10. 100.
'00
"
FREQUENCY -Hz 15ET-SETCURRENT-~ ISfT-SETCURRENT1JA

OUTPUT VOLTAGE SWING OUTPUT VOLTAGE SWING GAIN-BANDWIDTH

AS A FUNCTION OF AS A FUNCTION OF PRODUCT AS A FUNCTION

'"
•
LOAD RESISTANCE
TA"25°C

A,
- -+-t
v~.m~+ r-
ISET"lS\JA
I
-
32

24
SUPPLY VOL TAGE
TA"25°C 1.5IJA5 ISfT515>tA
18 - r - - - - - - R "75kQ
l
I'
I:~~:~A~ V
'I ~
10M

'M
OF SET CURRENT
TA"ZSQC

t::- r-VS- QSV

,
;;..

8
I
vs·:t 15V
ISfT·1.51l~_
e-
I

l' II
10

"
~, V
V'-
100.
V'" VS ·±3.OV
=
2 II d I SET -1.5IJA

V V;
-,t
12
1-- .,f 7' RL"SkQ

J.
-
V' C--- ---

, 11"\'1' ~
10'

-
Y"'J'''lii 1- ~ l
0
It 100' 1M
o /
o U t6 ±9 m !I5 ~lg
"0.1 10 100
LOAD RESISTANCE- Q SUPPLY VOLTAGE - V Is.:T-SETCURRENT-uA

5-161
 FAIRCHILD • fLA776
TYPICAL PERFORMANCE CURVES FOR MA77S AND MA77SC

OPEN LOOP VOLTAGE OPEN LOOP VOLTAGE GAIN OPEN LOOP VOLTAGE GAIN
GAIN AS A F.UNCTION OF AS A FUNCTION OF AS A FUNCTION OF
AMBIENT TEMPERATURE AMBIENT TEMPERATURE SET CURRENT

, I I I Js",~v
i v,l".L 1.'"
soo , I I I I.2M
ISET'l5rJ,A Rl '5kQ

400 , i i l
SET • l,,", Rl.'skn
1M
".- f'., 10' f-f-+-t+--+ v,. '''v....!'''/-+:...-!'''H+---I

, I ..--J.-1 I ~ 800, /v,.".OV=

, ...v-
100 :~'I.5~.RL'75k~ - 600 , ..- l-f--
100 ,I-"~ r I I ' L 400 , ..- V Isrr'l,5\lA RL'mn
1"\
0 I I I 200, i

: I I 0
60 10 ro 60 100 140 -60 60 100 140
TEMPERATURE·OC TEMPERATURE·QC 'SET-SETCURRENT-IIA

COMMON MODE REJECTION POWER SUPPLY REJECTION SUPPLY CURRENT

RATIO AS A FUNCTION RATIO AS A FUNCTION AS A FUNCTION OF
OF SET CURRENT OF SET CURRENT AMBIENT TEMPERATURE
150
I II ,! I
,- r- ISfT'l5\lA L.L
vs·.t15~J
I I~ lA'25°C
§. 110 L.-:"

{f;~
f-- , 30 I-rt--+-----+<-I-i--+-;+---I
v'·I"·w- /--
, ~
~
§ ror-~r-1_,-~~~~~ !
I-- i i III
iii
-
I
Vs·:!:3.OV I! -t- I/--t--
i
I
--
-- L_
+
1

lSET'l.%IA
10 f-H-H--+---r-t-H-t-i--+1+---1
iI II i i 30 vs"tl5V

80 II II I
..,
o
20
I
ro 60
VS ·±3.OV
100 140
10 100
'SlT-SETCURRENT-IlA lsn-SETCURRENT-!JA TEMPERATURE .oC

STANDBY SUPPLY CURRENT THERMAL RESPONSE OF INPUT STABILIZATION TIME

AS A FUNCTION OF OFFSET VOLTAGE TO STEP OF INPUT OFFSET
SET CURRENT CHANGE OF CASE TEMPERATURE VOLTAGE FROM POWER ON
TA '25°C
:t3,OV oS Vs ~ +18v
""
rIi-+ ! ... _.
/'
v
+- ;.....
_.
~-
-V V
-

c-J --~- ._._- -----

/-- r-- ,L -- -- _.
ri-- l c-- - _V S·:t15V _ _
Inltlalorfset V TA"25GC
VS' !15V

r+
VIOlt~!lrl.OtN
-- - Intlal retrolt~r·OrV r-
I
·10 ro 40 60 80 -I 0 1 2 3 4 5 6 1 8 9
IstT-SETCURRENT-1lA TIME FROM HEAT APPLICATION - SECONDS TIME FROM POWER APPLICATION- MIN.

INPUT OFFSET VOLTAGE SLEW RATE VOLTAGE FOLLOWER

DRIFT AS A FUNCTION AS A FUNCTION OF TRANSIENT RESPONSE
OF TIME SET CURRENT (UNITY GAINI
100
I I IOf=I= ".
i!;.

~
80
VS·.t18V
TA 'I25°C-
1 Ff ,
-t /""'-
g VS·''':.;zL VS-flSV
-+ -
~
TR£NDLINE
1S£T'lSIA~
; 60
"..-
~ 0.1 VS' ~3.0V
I Rl"SkQ_
-
~ ~ I CL"lOOpF

z " 0,01 Y J
t!I
I
~ 20
II -[;j. _. 1
o
o !til .
TIME' HitS.
600 800 1000
0,001
0.01 '"
V-
0.1

ISET-SETCURR£NT-IoiA
10 100
. II
1.5 ,.,

5-162
 FAIRCHILD • JLA776
BIASING CIRCUITS

RESISTOR BIASING TRANSISTOR CURRENT VOLTAGE OFFSET

SOURCE BIASING NULL CIRCUIT

V.

l00k!1
VB V-

RSET CONNECTED TO GROUND

FETCURRENTSOURCE TRANSIENT RESPONSE

BIASING TEST CIRCUIT

RSET CONNECTED TO V-

• Recommended for
supply voltages less than ±6V.

SET CURRENT AS A QUIESCENT CURRENT SETTING RESISTOR ISET EQUATIONS:

FUNCTION OF SET RESISTOR "SET TOV-)

ISET V+ -0.7 - V-
Vs ISET = RSET
1.5/iA 15/iA
c: ...... where RSET is connected to V-
~!:>i 1M -VS· ~]V'-'+-+CrB...-1"'"N:H--l ±1.5 V 1.7M>! 170k>!

±3.0V 3.6M>! 360k>!

V+ -0.7
±6.0V 7.5M>! 750k>! ISET = RSET

±15 V 20M>! 2.0M>! where RSET is connected to ground.

Note: The JlA 776 may be operated with
ASET connected to ground or V-.

5-163
 FAIRCHILD • J.tA776
TYPICAL APPLICATIONS
HIGH ACCURACY SAMPLE AND HOLD

SAMPLE~
+15V

,lOTI
SAMPLE

-15V
HOLD
l000pF
300krL

• HOLD CAPACITOR

MUL TIPLEXING AND SIGNAL CONDITIONING NANO-WATT AMPLIFIER

WITHOUT FETs

+15V O--""IV-----+ VOUT

+lSV o-W'r-----+ -15V

HIGH INPUT IMPEDANCE
AMPLIFIER

s, o-W'r->---Y"

f15V o-'v.IV----....

-t5V

5-164