UA776
PROGRAMMABLE LOW POWER
SINGLE OPERATIONAL AMPLIFIERS
..
..
..
MICROPOWER OPERATION
NO FREQUENCY COMPENSATION
REQUIRED
WIDE PROGRAMMING RANGE
HIGH SLEW RATE
SHORT-CIRCUIT PROTECTION
PROGRAMMABLE SINGLE OP-AMPs
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
ORDER CODES
Temperature
Range
o
o
UA776C
0 C, +70 C
UA776I
-40 C, +105 C
UA776M
Package
N
D
•
•
o
o
•
•
o
o
•
•
-55 C, +125 C
776-01.TBL
Part
Number
Example : UA776CN, UA776CD
DESCRIPTION
The UA776 programmable operational amplifier is
characterized by, low supply current and low input
noise over a wide range of operating supply voltages.
Coupled with programmable electrical characteristics, it is an extremely versatile amplifier for use
in high accuracy, low power consumption analog
applications.
Input noise voltage and current, power consumption, and input current can be optimized by a single
resistor or current source that sets the chip quiescent current for nano-watt power consumption or
for characteristics similar to the UA741.
Internal frequency compensation, absence of latch
up, high slew rate and short-circuit protection assure ease of use in long time integrators, active
filters, and sample and hold circuits.
April 1995
PIN CONNECTIONS (top view)
1
8
2
-
7
3
+
6
4
1 - Offset null 1
2 - Inverting input
3 - Non-inverting input
4 - VCC
5
5 - Offset null 2
6 - Output
+
7 - VCC
8 - Iset
1/8
UA776
SCHEMATIC DIAGRAM
I set
Q17
Q15
Q14
VCC
Q13
Q16
Q11
Q12
Q23
Non-inverting
Input
Q1
R3
2kΩ
Inverting
Input
Q2
C1
Q4
Q3
R4
50Ω
Q21
R6
100Ω
Output
Q22
Q5
Q6
Q8
Offset
null 2
R1
10kΩ
R7
100Ω
R8
50Ω
Q7
R2
10kΩ
Q9
Q19
Q18
Q24
Q20
Q10
VCC
776-03.EPS
Offset
null 1
ABSOLUTE MAXIMUM RATINGS
VCC
UA776M
UA776I
UA776C
Unit
Supply Voltage
Parameter
±18
±18
±18
V
V
Vi
Input Voltage - (note 1)
±15
±15
±15
Vid
Differential Input Voltage
±30
±30
±30
V
Ptot
Power Dissipation
500
310
310
mW
Output Short-circuit Duration
Operating Free Air Temperature Range
-55 to +125
-40 to +105
0 to +70
o
Tstg
Storage Temperature Range
-65 to +150
-65 to +150
-65 to +150
o
Note :
2/8
Infinite
Toper
1. For supply voltages less than ±15V, the absolute maximum input voltage is equal to the supply voltage.
C
C
776-02.TBL
Symbol
UA776
ELECTRICAL CHARACTERISTICS
VCC = ±15V, Tamb = 25oC (unless otherwise specified)
Vio
Iio
Iib
Iset = 1.5µA
Parameter
Min.
Typ.
Max.
Input Offset Voltage
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
2
Input Offset Current
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
SVR
ICC
Typ.
Max.
5
6
2
5
6
0.7
3
10
2
15
40
2
2
7.5
10
20
15
15
50
50
100
Input Bias Current
Tamb = 25oC
nA
UA776M
UA776I,C
Large Signal Voltage Gain (V o = ±10V)
o
R L = 5kΩ
Tamb = 25 C
R L = 75kΩ
R L = 75kΩ
Tmin. ≤ Tamb ≤ Tmax.
R L = 5kΩ
Supply Voltage Rejection Ratio (Rs ≤ 10kΩ)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
V/mV
100
200
100
75
dB
77
77
92
20
90
Output Short-circuit Current
0.5
3
160
180
200
V
dB
15
70
70
90
6
12
10
13
30
mA
V
R L = 5kΩ
R L = 75kΩ
R L = 75kΩ
Vior
Offset Voltage Adjustment Range
SR
Slew Rate (Vi = ±10V, C L = 100pF, unity gain)
R L = 5kΩ
R L = 75kΩ
KOV
92
±10
70
70
tr
25
30
±10
Input Common Mode Voltage Range
Common Mode Rejection Ratio (R s ≤ 10kΩ)
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
Tmin. ≤ Tamb ≤ Tmax
77
77
µA
Supply Current - (no load)
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
Output Voltage Swing
Tamb = 25oC
400
400
Vicm
Ios
Unit
nA
CMR
±VOPP
Min.
mV
Tmin. ≤ Tamb ≤ Tmax.
Avd
Iset = 15µA
12
10
14
10
9
18
mV
V/µs
0.2
0.01
Rise Time (Vi = ±20mV, CL = 100pF, unity gain)
R L = 5kΩ
R L = 75kΩ
0.8
0.1
0.35
µs
1.6
Overshoot (V i = ±20mV, CL =100pF, unity gain)
R L = 5kΩ
R L = 75kΩ
0
%
10
Ri
Input Resistance
50
5
Cid
Differential Input Capacitance
2
2
pF
Ro
Output Resistance
5
1
kΩ
GBP
THD
en
Gain Bandwidth Product
o
(Tamb = 25 C, CL = 100pF )
f = 100kHz
f = 10kHz
MΩ
MHz
R L = 5kΩ
R L = 75kΩ
0.4
0.03
0.7
0.1
%
Total Harmonic Distortion (f = 1kHz, AV = 20dB,
o
Vo = 2VPP, CL = 100pF, Tamb = 25 C)
R L = 5kΩ
R L = 75kΩ
0.8
Equivalent Input Noise Voltage
(f = 1kHz, Rs = 100Ω)
40
0.025
20
nV
√

Hz
3/8
776-03.TBL
Symbol
UA776
ELECTRICAL CHARACTERISTICS
VCC = ±3V, Tamb = 25oC (unless otherwise specified)
Vio
Iio
Iib
Iset = 1.5µA
Parameter
Min.
Typ.
Max.
Input Offset Voltage
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
2
Input Offset Current
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
SVR
ICC
Max.
5
6
2
5
6
0.7
3
10
2
15
40
2
2
7
10
20
15
15
50
50
100
Input Bias Current
Tamb = 25oC
nA
UA776M
UA776I,C
Large Signal Voltage Gain (V o = ±1V)
o
R L = 5kΩ
Tamb = 25 C
R L = 75kΩ
R L = 5kΩ
Tmin. ≤ Tamb ≤ Tmax.
R L = 75kΩ
Supply Voltage Rejection Ratio (Rs ≤ 10kΩ)
Tamb = 25oC
Tmin. ≤ Tamb ≤ Tmax.
V/mV
50
50
200
25
dB
77
77
92
20
25
±1
92
130
160
180
±1
Input Common Mode Voltage Range
70
70
90
Output Short-circuit Current
0.5
3
2
2.4
V
dB
15
70
70
90
2
5
2
1.9
2
1.9
2.4
2.1
20
mA
V
RL =
RL =
RL =
RL =
75kΩ
5kΩ
75kΩ
5kΩ
Vior
Offset Voltage Adjustment Range
SR
Slew Rate (Vi = ±1V, CL = 100pF, unity gain)
R L = 5kΩ
R L = 75kΩ
tr
77
77
µA
13
Common Mode Rejection Ratio (R s ≤ 10kΩ)
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
Tmin. ≤ Tamb ≤ Tmax
200
25
Supply Current, no load
o
Tamb = 25 C
Tmin. ≤ Tamb ≤ Tmax.
Output Voltage Swing
Tamb = 25oC
Unit
nA
Vicm
Ios
Rise Time (Vi = ±20mV, CL = 100pF, unity gain)
R L = 5kΩ
R L = 75kΩ
2
9
18
mV
V/µs
0.35
0.03
0.6
µs
3
Overshoot (V i = ±20mV, CL =100pF, unity gain)
R L = 5kΩ
R L = 75kΩ
0
Ri
Input Resistance
50
5
MΩ
Cid
Differential Input Capacitance
2
2
pF
Ro
Output Resistance
5
1
KOV
GBP
THD
en
4/8
Typ.
CMR
±VOPP
Min.
mV
Tmin. ≤ Tamb ≤ Tmax.
Avd
Iset = 15µA
Gain Bandwidth Product
o
(Tamb = 25 C, CL = 100pF )
f = 100kHz
f = 10kHz
%
5
kΩ
MHz
R L = 5kΩ
R L = 75kΩ
0.5
0.075
%
Total Harmonic Distortion (f = 1kHz, AV = 20dB,
o
Vo = 1VPP, CL = 100pF, Tamb = 25 C)
R L = 5kΩ
R L = 75kΩ
1
Equivalent Input Noise Voltage
(f = 1kHz, Rs = 100Ω)
20
0.03
20
nV
√

Hz
776-04.TBL
Symbol
UA776
BIASING CIRCUITS
RESISTOR BIASING
VCC
VCC
UA776
UA776
Vo
Vo
R set
R set
R set connected to VCC
Recommended for : VCC
776-04.EPS
R set connected to ground
TRANSISTOR CURRENT SOURCE BIASING
776-05.EPS
VCC
VCC
6V
FET CURRENT SOURCE BIASING
UA776
UA776
BC 487
VB
R1
VG
776-06.EPS
VCC
VCC
TRANSIENT RESPONSE TIME TEST CIRCUIT
UA776
Vo
UA776
100kΩ
VCC
VI
776-08.EPS
R set
R set
CL
RL
VCC
776-09.EPS
OFFSET VOLTAGE NULL CIRCUIT
776-07.EPS
BF 247
R1
5/8
UA776
TYPICAL APPLICATIONS
HIGH ACCURACY SAMPLE AND HOLD
+15V
100kΩ
Sample 50nA
UA776
Analog input
eI
-5V < VI < +5V
BF 247
Hold 0.75nA
100kΩ
C1
0.1µF
Gate
Sample
+15V
Iset
-15V
1N4148
BC 487
-15V
Hold
MULTIPLEXING AND SIGNAL CONDITIONING
WITHOUT FETs
R1
100kΩ
R2
1MΩ
R2
30MΩ
776-10.EPS
R1
300kΩ
NANO-WATT AMPLIFIER
+15V
R1
1MΩ
UA776
R1
100kΩ
V1
+15V
2.7M Ω
-15V
+1.2V
eI
R3
270k Ω
R5
5.6k Ω
R1
100kΩ
R2
1M Ω
UA776
eo
BC 487
-1.2V
R3
91kΩ
+15V
UA776
22MΩ
PD = 600nW
776-12.EPS
S1
R4
10kΩ
Vo
V2
2.7M Ω
-15V
+15V
S2
HIGH INPUT IMPEDANCE AMPLIFIER
R3
270k Ω
R4
10kΩ
50MΩ
BC 487
R5
5.6k Ω
R2
1M Ω
+15V
UA776
500kΩ
2.7MΩ
-15V
R3
270k Ω
R4
10kΩ
30MΩ
BC 487
R5
5.6k Ω
6/8
50MΩ
776-11.EPS
S3
10kΩ
UA776
V3
+15V
90kΩ
+15V
-15V
776-13.EPS
R1
100kΩ
500kΩ
UA776
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC DIP
B
I
L
a1
A
e4
b1
B1
b
E
e
Z
e3
Z
D
5
1
4
A
a1
B
b
b1
D
E
e
e3
e4
F
i
L
Z
Min.
Millimeters
Typ.
3.32
0.51
1.15
0.356
0.204
Max.
1.65
0.55
0.304
10.92
9.75
7.95
Min.
0.020
0.045
0.014
0.008
Max.
0.065
0.022
0.012
0.430
0.384
0.313
2.54
7.62
7.62
3.18
Inches
Typ.
0.131
0.100
0.300
0.300
6.6
5.08
3.81
1.52
0.125
0260
0.200
0.150
0.060
DIP8.TBL
Dimensions
PM-DIP8.EPS
F
8
7/8
UA776
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC MICROPACKAGE (SO)
s
e3
b1
e
a1
b
A
a2
C
c1
a3
L
E
D
M
5
1
4
A
a1
a2
a3
b
b1
C
c1
D
E
e
e3
F
L
M
S
Min.
Millimeters
Typ.
0.1
0.65
0.35
0.19
0.25
Max.
1.75
0.25
1.65
0.85
0.48
0.25
0.5
Min.
Inches
Typ.
0.026
0.014
0.007
0.010
Max.
0.069
0.010
0.065
0.033
0.019
0.010
0.020
0.189
0.228
0.197
0.244
0.004
o
45 (typ.)
4.8
5.8
5.0
6.2
1.27
3.81
3.8
0.4
0.050
0.150
4.0
1.27
0.6
0.150
0.016
0.157
0.050
0.024
o
8 (max.)
SO8.TBL
Dimensions
PM-SO8.EPS
F
8
 1995 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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8/8
ORDER CODE :
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.