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PDF OP77 Data sheet ( Hoja de datos )
| Número de pieza | OP77 | |
| Descripción | Next Generation OP07 Ultralow Offset Voltage Operational Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Next Generation OP07 Ultralow
Offset Voltage Operational Amplifier
OP77
FEATURES
Outstanding gain linearity
Ultrahigh gain, 5000 V/mV min
Low VOS over temperature, 55 μV max
Excellent TCVOS, 0.3 μV/°C max
High PSRR, 3 μV/V max
Low power consumption, 60 mW max
Fits OP07, 725,108A/308A, 741 sockets
Available in die form
GENERAL DESCRIPTION
The OP77 significantly advances the state-of-the-art in
precision op amps. The outstanding gain of 10,000,000 or more
for the OP77 is maintained over the full 10 V output range. This
exceptional gain-linearity eliminates incorrectable system
nonlinearities common in previous monolithic op amps and
provides superior performance in high closed-loop gain
applications. Low initial VOS drift and rapid stabilization time,
combined with only 50 mW of power consumption, are
significant improvements over previous designs. These
characteristics, plus the exceptional TCVOS of 0.3 μV/°C
maximum and the low VOS of 25 μV maximum, eliminates the
PIN CONNECTIONS
VOS TRIM 1
–IN 2
OP77
8 VOS TRIM
7 V+
+IN 3
6 OUT
V– 4 TOP VIEW 5 NC
(Not to Scale)
NC = NO CONNECT
Figure 1. 8-Pin Hermetic
DIP_Q-8 (Z Suffix)
VOS TRIM
VOS TRIM 8 V+
1 OP77 7
–IN 2
6 OUT
35
+IN 4 NC
4V– (CASE)
TOP VIEW
(Not to Scale)
NC = NO CONNECT
Figure 2. TO-99
(J Suffix)
need for VOS adjustment and increases system accuracy over
temperature.
A PSRR of 3 μV/V (110 dB) and CMRR of 1.0 μV/V maximum
virtually eliminate errors caused by power supply drifts and
common-mode signals. This combination of outstanding
characteristics makes the OP77 ideally suited for high resolution
instrumentation and other tight error budget systems.
Rev. F
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2002–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
TYPICAL ELECTRICAL CHARACTERISTICS
@ VS = ±15 V, TA = 25°C, unless otherwise noted.
Table 4.
Parameter
AVERAGE INPUT OFFSET VOLTAGE DRIFT
NULLED INPUT OFFSET VOLTAGE DRIFT
AVERAGE INPUT OFFSET CURRENT DRIFT
SLEW RATE
BANDWIDTH
Symbol
TCVOS
TCVOSn
TCIOS
SR
BW
Conditions
RS = 50 Ω
RS = 50 Ω, RP = 20 kΩ
RL ≥ 2 kΩ
AVCL + 1
OP77
OP77NBC Limit
0.1
0.1
0.5
0.3
0.6
Unit
µV/°C
µV/°C
pA/°C
V/µs
MHz
Rev. F | Page 5 of 16
5 Page 
Data Sheet
APPLICATIONS
R2
1MΩ
+15V
0.1µF
R1
1kΩ 2
7
OP77E 6
3
R3
1kΩ R4
4
0.1µF
1MΩ
–15V
Figure 27. Precision High-Gain Differential Amplifier
The high gain, gain linearity, CMRR, and low TCVOS of the
OP77 make it possible to obtain performance not previously
available in single-stage, very high-gain amplifier applications.
For best CMR,
R1
R2
must equal
R3
R4
.
In
this
example,
with
a
10 mV differential signal, the maximum errors are as listed in
Table 7.
Table 7. Maximum Errors
Type
Common-Mode Voltage
Gain Linearity, Worst Case
TCVOS
TCIOS
RF
10µF
Amount
0.01%/V
0.02%
0.003%/°C
0.008%/°C
+15V
0.1µF
INPUT
RS
27
OP77 6
3
4
0.1µF
100Ω
OUTPUT
CLOAD
–15V
Figure 28. Isolating Large Capacitive Loads
This circuit reduces maximum slew rate but allows driving
capacitive loads of any size without instability. Because the boon
resistor is inside the feedback loop, its effect on output
impedance is reduced to insignificance by the high open-loop
gain of the OP77.
OP77
R3
+15V
VIN
R1
R2
2
OP77
3
6
2N2222
2N2907
R5
R4 –15V
( )IOUT = VIN
R3
R1 – R5
GIVEN R3 = R4 + R5, R1 = R2
Figure 30. 100 mA Current Source
IOUT < 100mA
These current sources can supply both positive and negative
current into a grounded load.
Note that
ZO
=
R5
R4
R2
+ 1
R5 + R4 R3
R2 R1
And that for ZO to be infinite
R5 + R4
R2
must =
R3
R1
R3
1kΩ
R1
100kΩ
VIN
R2
100kΩ
2
OP77
3
6
R4
990Ω
IOUT < 15mA
R5
10Ω
Figure 29. Basic Current Source
Rev. F | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet OP77.PDF ] | |
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