Overview
The OP177GZ is an ultraprecision operational amplifier produced by Analog Devices Inc. It is renowned for its exceptional precision performance, making it one of the highest precision operational amplifiers available. The OP177GZ features an extremely low offset voltage, outstanding offset voltage drift, and excellent open-loop gain and gain linearity. This amplifier is designed to provide accurate performance in high closed-loop gain applications and serves as a cost-effective alternative to chopper-stabilized amplifiers.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | TA = 25°C | 10 | 25 | 60 | μV |
| Input Offset Voltage | VOS | −40°C ≤ TA ≤ +85°C | 20 | 100 | μV | |
| Offset Voltage Drift | ΔVOS/ΔT | −40°C ≤ TA ≤ +85°C | 0.03 | 0.1 | 0.3 | μV/°C |
| Input Offset Current | IOS | −0.2 | 1.2 | 2.8 | nA | |
| Input Bias Current | IB | −0.2 | 1.2 | 2.8 | nA | |
| Common-Mode Rejection Ratio | CMRR | VCM = ±13 V | 120 | 140 | dB | |
| Power Supply Rejection Ratio | PSRR | VCM = ±13 V | 115 | 120 | dB | |
| Supply Current | ISY | VO = 0 V | 2.0 | mA | ||
| Input Noise Voltage | en | f = 1 Hz to 100 Hz | 118 | 150 | nV rms | |
| Input Noise Current | in | f = 1 Hz to 100 Hz | 3 | 8 | pA rms |
Key Features
- Ultralow Offset Voltage: The OP177GZ has an offset voltage of only 10 μV max at room temperature and 20 μV max over the full military temperature range of −40°C to +85°C.
- Exceptional Offset Voltage Drift: The amplifier features an offset voltage drift of 0.1 μV/°C max, ensuring high system accuracy over temperature.
- Excellent Open-Loop Gain and Gain Linearity: It maintains an open-loop gain of 12 V/μV over the full ±10 V output range.
- High CMRR and PSRR: Common-Mode Rejection Ratio (CMRR) of 130 dB min and Power Supply Rejection Ratio (PSRR) of 120 dB min ensure robust performance against common-mode and power supply noise.
- Low Supply Current: The amplifier has a maximum supply current of 2.0 mA, making it power-efficient.
- Low Noise Performance: It offers low noise characteristics, making it suitable for high precision applications).
Applications
- Precision Instrumentation: The OP177GZ is ideal for precision instrumentation due to its ultralow offset voltage and exceptional stability over temperature).
- High Closed-Loop Gain Applications: Its high open-loop gain and low offset voltage make it suitable for applications requiring high closed-loop gain).
- Medical and Scientific Equipment: The amplifier's high precision and low noise characteristics make it a good fit for medical and scientific equipment).
- Industrial Control Systems: It can be used in industrial control systems where high accuracy and stability are required).
Q & A
- What is the typical offset voltage of the OP177GZ at room temperature?
The typical offset voltage of the OP177GZ at room temperature is 10 μV max).
- What is the maximum offset voltage drift of the OP177GZ over temperature?
The maximum offset voltage drift of the OP177GZ is 0.1 μV/°C).
- What is the common-mode rejection ratio (CMRR) of the OP177GZ?
The CMRR of the OP177GZ is 130 dB min).
- What is the power supply rejection ratio (PSRR) of the OP177GZ?
The PSRR of the OP177GZ is 120 dB min).
- What is the maximum supply current of the OP177GZ?
The maximum supply current of the OP177GZ is 2.0 mA).
- In what temperature range is the OP177GZ fully specified?
The OP177GZ is fully specified for operation from −40°C to +85°C).
- What are the typical input noise voltage and current of the OP177GZ?
The typical input noise voltage is 118-150 nV rms, and the typical input noise current is 3-8 pA rms).
- What are the common packaging options for the OP177GZ?
The OP177GZ is available in 8-lead PDIP and 8-lead SOIC packages).
- Is the OP177GZ suitable for high closed-loop gain applications?
Yes, the OP177GZ is highly suitable for high closed-loop gain applications due to its high open-loop gain and low offset voltage).
- Can the OP177GZ replace chopper-stabilized amplifiers?
Yes, the OP177GZ can serve as a cost-effective alternative to chopper-stabilized amplifiers, offering chopper-type performance without the associated drawbacks).
