Overview
The OPA2277PAG4 is a high-precision operational amplifier from Texas Instruments, part of the OPAx277 series. These devices are designed to replace the industry standard OP-177 and offer improved performance in terms of noise, output voltage swing, and speed, while reducing quiescent current. The OPA2277 is available in dual versions and features ultra-low offset voltage, low drift, and high common-mode rejection, making it suitable for a wide range of precision applications.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | TA = 25°C, VS = 10 V to 30 V | ±10 | ±20 | ±25 | µV |
| Input Offset Voltage Drift (dVOS/dT) | TA = –40°C to +85°C | ±0.1 | ±0.15 | ±0.25 | µV/°C |
| Common-Mode Rejection Ratio (CMRR) | VCM = (V–) + 2 V to (V+) – 2 V | 130 | 140 | 140 | dB |
| Power Supply Rejection Ratio (PSRR) | VS = ±2 V to ±18 V | 130 | 140 | 140 | dB |
| Bias Current | TA = 25°C | 1 | nA | ||
| Quiescent Current | TA = 25°C | 800 | µA/amplifier | ||
| Supply Voltage Range | ±2 V | ±18 V | V | ||
| Unity-Gain Bandwidth | 1 | MHz |
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
- Unity-gain stable and free from phase inversion and overload problems
- Completely independent circuitry in dual and quad versions for lowest crosstalk
Applications
- Analog input modules
- Weigh scales
- Temperature transmitters
- Pressure transmitters
- Data acquisition (DAQ) systems
- Lab and field instrumentation
- Battery test equipment
- Transducer amplifiers
- Bridge amplifiers
- Strain gage amplifiers
- Precision integrators
- Battery-powered instruments
- Test equipment
Q & A
- What is the input offset voltage of the OPA2277?
The input offset voltage of the OPA2277 is typically ±20 µV, with a maximum of ±25 µV at 25°C.
- What is the input offset voltage drift of the OPA2277?
The input offset voltage drift is typically ±0.1 µV/°C, with a maximum of ±0.25 µV/°C over the temperature range of –40°C to +85°C.
- What is the common-mode rejection ratio (CMRR) of the OPA2277?
The CMRR is typically 140 dB, with a minimum of 130 dB.
- What is the power supply rejection ratio (PSRR) of the OPA2277?
The PSRR is typically 140 dB, with a minimum of 130 dB.
- What is the bias current of the OPA2277?
The bias current is a maximum of 1 nA.
- What is the quiescent current of the OPA2277?
The quiescent current is 800 µA per amplifier.
- What is the supply voltage range of the OPA2277?
The supply voltage range is ±2 V to ±18 V.
- Is the OPA2277 unity-gain stable?
Yes, the OPA2277 is unity-gain stable and free from phase inversion and overload problems.
- What are the typical applications of the OPA2277?
The OPA2277 is used in analog input modules, weigh scales, temperature transmitters, pressure transmitters, DAQ systems, lab and field instrumentation, and more.
- Are there different package options available for the OPA2277?
Yes, the OPA2277 is available in PDIP, SOIC, and VSON packages.
