Datasheet

ManualsBrandsAnalog Devices ManualsAmplifiers & ComparatorsOperational Amplifier, Single, 600 kHz, DIL-8

Ultraprecision Operational Amplifier

Data Sheet

OP177

Rev. H 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.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support www.analog.com

FEATURES

Ultralow offset voltage

= 25°C, 25 μV maximum

Outstanding offset voltage drift 0.3 μV/°C maximum

Excellent open-loop gain and gain linearity

12 V/μV typical

CMRR: 130 dB minimum

PSRR: 115 dB minimum

Low supply current 2.0 mA maximum

Fits industry-standard precision operational amplifier

sockets

PIN CONFIGURATION

NC = NO CONNECT

–IN

+IN

V+

OUT

NCV–

TRIM V

TRIM

00289-001

OP177

TOP VIEW

(Not to Scale)

Figure 1. 8-Lead PDIP (P-Suffix),

8-Lead SOIC (S-Suffix)

GENERAL DESCRIPTION

The OP177 features one of the highest precision performance of

any operational amplifier currently available. Offset voltage of the

OP177 is only 25 μV maximum at room temperature. The ultralow

of the OP177 combines with the exceptional offset voltage

drift (TCV

) of 0.3 μV/°C maximum to eliminate the need for

external V

adjustment and increases system accuracy over

temperature.

The OP177 open-loop gain of 12 V/μV is maintained over the full

±10 V output range. CMRR of 130 dB minimum, PSRR of 120 dB

minimum, and maximum supply current of 2 mA are just a few

examples of the excellent performance of this operational amplifier.

The combination of outstanding specifications of the OP177

ensures accurate performance in high closed-loop gain

applications.

This low noise, bipolar input operational amplifier is also a cost

effective alternative to chopper-stabilized amplifiers. The OP177

provides chopper-type performance without the usual problems

of high noise, low frequency chopper spikes, large physical size,

limited common-mode input voltage range, and bulky external

storage capacitors.

The OP177 is offered in the −40°C to +85°C extended industrial

temperature ranges. This product is available in 8-lead PDIP, as

well as the space saving 8-lead SOIC.

FUNCTIONAL BLOCK DIAGRAM

(OPTIONAL NULL)

OUTPUT

V+

V–

NONINVERTING

INPUT

INVERTING

INPUT

AND R

ARE ELECTRONICALLY ADJUSTED ON CHIP AT FACTORY.

00289-002

Figure 2. Simplified Schematic

Summary of content (16 pages)

PAGE 1
Ultraprecision Operational Amplifier OP177 Data Sheet PIN CONFIGURATION Ultralow offset voltage TA = 25°C, 25 μV maximum Outstanding offset voltage drift 0.3 μV/°C maximum Excellent open-loop gain and gain linearity 12 V/μV typical CMRR: 130 dB minimum PSRR: 115 dB minimum Low supply current 2.
PAGE 2
OP177 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Applications Information .................................................................9 Pin Configuration ............................................................................. 1 Gain Linearity ................................................................................9 General Description ..........................................................
PAGE 3
Data Sheet OP177 SPECIFICATIONS ELECTRICAL CHARACTERISTICS At VS = ±15 V, TA = 25°C, unless otherwise noted. Table 1.
PAGE 4
OP177 Data Sheet At VS = ±15 V, −40°C ≤ TA ≤ +85°C, unless otherwise noted. Table 2.
PAGE 5
Data Sheet OP177 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 3.
PAGE 6
OP177 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 20 TA = 25°C VS = ±15V RL = 10kΩ VS = ±15V ABSOLUTE CHANGE IN INPUT OFFSET VOLTAGE (µV) 25 1 0 –1 DEVICE IMMERSED IN 70° OIL BATH (20 UNITS) 30 35 40 –2 –10 0 OUTPUT VOLTAGE (V) –5 50 0 10 5 Figure 6. Gain Linearity (Input Voltage vs. Output Voltage) 30 20 40 TIME (Seconds) 50 60 70 25 TA = 25°C VS = ±15V OPEN-LOOP GAIN (V/µV) 20 10 15 10 1 20 10 30 TOTAL SUPPLY VOLTAGE, V+ TO V– (V) 0 0 –55 40 Figure 7.
PAGE 7
Data Sheet OP177 4 160 VS = ±15V TA = 25°C VS = ±15V OPEN-LOOP GAIN (dB) 3 2 120 100 80 60 40 1 0 0 50 TEMPERATURE (°C) –50 0 0.01 100 Figure 12. Input Bias Current vs. Temperature 00289-015 20 00289-012 INPUT BIAS CURRENT (nA) 140 0.1 1 100 10 1k FREQUENCY (Hz) 100k 10k 1M Figure 15. Open-Loop Frequency Response 2.0 150 VS = ±15V TA = 25°C 1.5 CMRR (dB) 130 1.0 110 90 –50 0 50 TEMPERATURE (°C) 00289-016 0 120 100 0.
PAGE 8
OP177 Data Sheet 20 TA = 25°C VS = +15V VIN = ±10mV RS1 = RS2 = 200kΩ THERMAL NOISE OF SOURCE RESISTORS INCLUDED MAXIMUM OUTPUT (V) 100 EXCLUDED RS = 0 10 POSITIVE SWING 15 NEGATIVE SWING 10 1 1 00289-018 TA = 25°C VS = ±15V 10 100 00289-021 5 0 100 1k Figure 21. Maximum Output Voltage vs. Load Resistance Figure 18. Total Input Noise Voltage vs.
PAGE 9
Data Sheet OP177 APPLICATIONS INFORMATION GAIN LINEARITY The actual open-loop gain of most monolithic operational amplifiers varies at different output voltages. This nonlinearity causes errors in high closed-loop gain circuits. It is important to know that the manufacturer’s AVO specification is only a part of the solution because all automated testers use endpoint testing and, therefore, show only the average gain.
PAGE 10
OP177 Data Sheet PRECISION HIGH GAIN DIFFERENTIAL AMPLIFIER ISOLATING LARGE CAPACITIVE LOADS The high gain, gain linearity, CMRR, and low TCVOS of the OP177 make it possible to obtain performance not previously available in single stage, very high gain amplifier applications. See Figure 28. The circuit shown in Figure 29 reduces maximum slew rate but allows driving capacitive loads of any size without instability.
PAGE 11
Data Sheet OP177 1kΩ 1kΩ +15V +15V 0.1µF C1 30pF D1 1N4148 2 2 VIN 3 7 – 3 6 OP177 7 – 4 R3 2kΩ 4 0.1µF VOUT 0 < VOUT < 10V + 2N4393 + 6 OP177 0.1µF 00289-030 0.1µF –15V –15V Figure 31. Precision Absolute Value Amplifier 1kΩ +15V +15V 0.1µF VIN 1kΩ 3 NC 7 2 – OP177 6 2N930 1kΩ + 4 0.1µF CH –15V 7 – AD820 3 + 4 6 VOUT 0.1µF –15V RESET 1kΩ 00289-031 2 0.1µF 1N4148 Figure 32. Precision Positive Peak Detector Rev.
PAGE 12
OP177 Data Sheet CC PRECISION POSITIVE PEAK DETECTOR RF 100kΩ In Figure 32, CH must be polystyrene, Teflon®, or polyethylene to minimize dielectric absorption and leakage. The droop rate is determined by the size of CH and the bias current of the AD820. 0.1µF RS 1kΩ VTH In Figure 33, when VIN < VTH, amplifier output swings negative, reverse biasing diode D1. VOUT = VTH if RL = ∞. When VIN ≥ VTH, the loop closes.
PAGE 13
Data Sheet OP177 OUTLINE DIMENSIONS 0.400 (10.16) 0.365 (9.27) 0.355 (9.02) 8 5 1 4 0.280 (7.11) 0.250 (6.35) 0.240 (6.10) 0.100 (2.54) BSC 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.060 (1.52) MAX 0.210 (5.33) MAX 0.015 (0.38) MIN 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) SEATING PLANE 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 0.195 (4.95) 0.130 (3.30) 0.115 (2.92) 0.015 (0.38) GAUGE PLANE 0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.430 (10.92) MAX 0.005 (0.13) MIN 0.070 (1.78) 0.060 (1.52) 0.045 (1.
PAGE 14
OP177 Data Sheet ORDERING GUIDE Model 1 OP177FPZ OP177GPZ OP177FSZ OP177FSZ-REEL OP177FSZ-REEL7 OP177GS OP177GS-REEL OP177GS-REEL7 OP177GSZ OP177GSZ-REEL OP177GSZ-REEL7 1 Temperature Range −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C Package Description 8-Lead PDIP 8-Lead PDIP 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_N 8-Lead SOIC_
PAGE 15
Data Sheet OP177 NOTES Rev.