Overview
The OPA2277PA is a high-precision operational amplifier produced by Texas Instruments. It is part of the OPAx277 series, which replaces the industry standard OP-177. These devices offer improved noise performance, wider output voltage swing, and are twice as fast with half the quiescent current compared to their predecessors. The OPA2277PA 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 | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Input Offset Voltage (VOS) | µV | ±10 | ±20 | ±25 |
| Input Offset Voltage Drift (dVOS/dT) | µV/°C | ±0.1 | ±0.15 | ±0.25 |
| Open-Loop Gain | dB | 134 | ||
| Common-Mode Rejection Ratio (CMRR) | dB | 130 | 140 | |
| Power-Supply Rejection Ratio (PSRR) | dB | 120 | 130 | |
| Bias Current | nA | 1 | ||
| Supply Voltage Range | V | ±2 | ±18 | |
| Quiescent Current per Amplifier | µA | 800 | ||
| Operating Temperature Range | °C | -40 | 85 |
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
- Replaces OP-07, OP-77, and OP-177
- Unity-gain stable and free from phase inversion and overload problems
- Completely independent circuitry in dual and quad versions for minimal crosstalk
Applications
- Analog input modules
- Weigh scales
- Temperature transmitters
- Pressure transmitters
- Data acquisition (DAQ) systems
- Lab and field instrumentation
- Battery testing
Q & A
- What is the input offset voltage of the OPA2277PA?
The input offset voltage of the OPA2277PA is typically ±20 µV, with a maximum of ±25 µV.
- What is the input offset voltage drift of the OPA2277PA?
The input offset voltage drift is typically ±0.1 µV/°C, with a maximum of ±0.25 µV/°C.
- What is the common-mode rejection ratio (CMRR) of the OPA2277PA?
The CMRR is typically 140 dB.
- What is the power-supply rejection ratio (PSRR) of the OPA2277PA?
The PSRR is typically 130 dB.
- What is the bias current of the OPA2277PA?
The bias current is a maximum of 1 nA.
- What is the supply voltage range of the OPA2277PA?
The supply voltage range is ±2 V to ±18 V.
- What is the quiescent current per amplifier of the OPA2277PA?
The quiescent current per amplifier is typically 800 µA.
- Is the OPA2277PA unity-gain stable?
Yes, the OPA2277PA is unity-gain stable and free from phase inversion and overload problems.
- What are the available package types for the OPA2277PA?
The OPA2277PA is available in PDIP (8-pin), SOIC (8-pin), and VSON (8-pin) packages.
- What applications is the OPA2277PA suitable for?
The OPA2277PA is suitable for analog input modules, weigh scales, temperature transmitters, pressure transmitters, data acquisition systems, lab and field instrumentation, and battery testing.
