Overview
The OPA277UAG4, part of the OPAx277 series from Texas Instruments, is a high-precision operational amplifier designed to replace industry standards such as the OP-07, OP-77, and OP-177. These devices offer improved noise performance, a wider output voltage swing, and are twice as fast with half the quiescent current compared to their predecessors. The OPA277UAG4 is known for its ultra-low offset voltage and drift, low bias current, high common-mode rejection, and high power supply rejection, making it suitable for a wide range of precision applications.
Key Specifications
| Parameter | Typical Value | Maximum Value |
|---|---|---|
| Input Offset Voltage (VOS) | ±10 µV | ±20 µV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.1 µV/°C | ±0.15 µV/°C |
| Open-Loop Gain | 134 dB | |
| Common-Mode Rejection Ratio (CMRR) | 140 dB | |
| Power Supply Rejection Ratio (PSRR) | 130 dB | |
| Input Bias Current (IB) | 1 nA | |
| Supply Voltage Range | ±2 V to ±18 V | |
| Quiescent Current per Amplifier | 800 µA | |
| Operating Temperature Range | -40°C to 85°C | |
| Package Type | SOIC (8 pins) |
Key Features
- Ultra-low offset voltage: 10 µV
- Ultra-low drift: ±0.1 µV/°C
- High open-loop gain: 134 dB
- High common-mode rejection: 140 dB
- High power supply rejection: 130 dB
- Low bias current: 1-nA maximum
- Wide supply range: ±2 V to ±18 V
- Low quiescent current: 800 µA/amplifier
- Single, dual, and quad versions available
- External trim pins for special applications (single version)
- Unity-gain stable and free from phase inversion and overload problems
Applications
- Transducer amplifiers
- Bridge amplifiers
- Temperature measurements
- Strain gage amplifiers
- Precision integrators
- Battery-powered instruments
- Test equipment
- Analog input modules
- Weigh scales
- Pressure transmitters
- Data acquisition (DAQ) systems
- Lab and field instrumentation
Q & A
- What is the input offset voltage of the OPA277UAG4? The input offset voltage is typically ±10 µV and can be up to ±20 µV maximum.
- What is the input offset voltage drift of the OPA277UAG4? The input offset voltage drift is typically ±0.1 µV/°C and can be up to ±0.15 µV/°C.
- What is the open-loop gain of the OPA277UAG4? The open-loop gain is 134 dB.
- What is the common-mode rejection ratio (CMRR) of the OPA277UAG4? The CMRR is 140 dB.
- What is the power supply rejection ratio (PSRR) of the OPA277UAG4? The PSRR is 130 dB.
- What is the input bias current of the OPA277UAG4? The input bias current is 1 nA maximum.
- What is the supply voltage range of the OPA277UAG4? The supply voltage range is ±2 V to ±18 V.
- What is the quiescent current per amplifier of the OPA277UAG4? The quiescent current per amplifier is 800 µA.
- What are the available package types for the OPA277 series? The OPA277 series is available in SOIC (8 pins), PDIP (8 pins), and other packages.
- Is the OPA277UAG4 unity-gain stable? Yes, the OPA277UAG4 is unity-gain stable and free from phase inversion and overload problems.
