OP1177 Precision Low Noise, Low Input Bias Current Single Op Amp

The OPx177 family consists of very high precision, single, dual, and quad amplifiers featuring extremely low offset voltage and drift, low input bias current, low noise, and low power consump-tion. Outputs are stable with capacitive loads of over 1000 pF with no external compensation. Supply current is less than 500 μA per amplifier at 30 V. Internal 500 Ω series resistors protect the inputs, allowing input signal levels several volts beyond either supply without phase reversal.

Unlike previous high voltage amplifiers with very low offset voltages, the OP1177 (single) and OP2177 (dual) amplifiers are available in tiny 8-lead surface-mount MSOP and 8-lead narrow SOIC packages. The OP4177 (quad) is available in TSSOP and 14-lead narrow SOIC packages. Moreover, specified performance in the MSOP and the TSSOP is identical to performance in the SOIC package. MSOP and TSSOP are available in tape and reel only.

The OPx177 family offers the widest specified temperature range of any high precision amplifier in surface-mount packaging. All versions are fully specified for operation from −40°C to +125°C for the most demanding operating environments.

Applications for these amplifiers include precision diode power measurement, voltage and current level setting, and level detection in optical and wireless transmission systems. Additional applications include line-powered and portable instrumentation and controls—thermocouple, RTD, strain-bridge, and other sensor signal conditioning—and precision filters.

Applications

Wireless base station control circuits
Optical network control circuits
Instrumentation
Sensors and controls Thermocouples Resistor thermal detectors (RTDs) Strain bridges Shunt current measurements
Precision filters

Features and Benefits

Low offset voltage: 60 μV maximum

Very low offset voltage drift: 0.7 μV/°C maximum

Low input bias current: 2 nA maximum

Low noise: 8 nV/√Hz typical

CMRR, PSRR, and AVO > 120 dB minimum

Low supply current: 400 μA per amplifier

Dual supply operation: ±2.5 V to ±15 V

Unity-gain stable

No phase reversal

Inputs internally protected beyond supply voltage

Amplifiers

SPICE Models

OP1177 SPICE Macro-Model .CIR

Reference Designs

CN0305 Design & Integration Files .ZIP

Data Sheets

Document	note
OP1177/OP2177/OP4177: Precision Low Noise, Low InputBias Current Operational Amplifiers Data Sheet (Rev. G)	PDF 487 kB

Application Notes

Document	note
AN-256: Accurately Testing Op Amp Settling Times	PDF 106 kB
AN-1313: Configuring the AD5422 to Combine Output Current and Output Voltage to a Single Output Pin (Rev. 0)	PDF 413 kB
AN-358: Noise and Operational Amplifier Circuits	PDF 593 kB
AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)	PDF 5.3 M
AN-579: Versatile Programmable Amplifiers Using Digital Potentiometers with Nonvolatile Memory (Rev. 0)	PDF 90 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
OP1177ARM-REEL Production	8 ld MSOP	REEL 3000	-40 to 125C	1.19	0.98	N
OP1177ARMZ Production	8 ld MSOP	OTH 50	-40 to 125C	0.98	0.81	Y
OP1177ARMZ-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	0.81	Y
OP1177ARMZ-REEL Production	8 ld MSOP	REEL 3000	-40 to 125C	0	0.81	Y
OP1177ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	0.98	0.81	Y
OP1177ARZ-REEL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	0.81	Y
OP1177ARZ-REEL7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	0.81	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-PRAOPAMP-1KSZ	Single KS-5 lead SC70 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RJZ	Single RJ-5 lead SOT23 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RMZ	Single RM-8 lead MSOP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RZ	Single R-8 lead SOIC Evaluation Board	20.19	Y