Overview
The OPA2277U 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 amplifiers are known for their improved noise performance, wider output voltage swing, and faster response times, all while maintaining a lower quiescent current compared to their predecessors. The OPA2277U operates over a wide supply range of ±2 V to ±18 V, making it versatile for various applications. It is available in single, dual, and quad versions, each featuring independent circuitry to minimize crosstalk and interaction between channels.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Input Offset Voltage (VOS) | ±10 µV | µV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.1 µV/°C | µV/°C |
| Open-Loop Gain | 134 dB | dB |
| Common-Mode Rejection Ratio (CMRR) | 140 dB | dB |
| Power-Supply Rejection Ratio (PSRR) | 130 dB | dB |
| Input Bias Current (IB) | ±1 nA | nA |
| Quiescent Current | 800 µA/amplifier | µA |
| Supply Voltage Range | ±2 V to ±18 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | SOIC (D), 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
- Replaces OP-07, OP-77, and OP-177
- Unity-gain stable with excellent dynamic behavior
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 OPA2277U?
The input offset voltage of the OPA2277U is typically ±10 µV.
- What is the input offset voltage drift of the OPA2277U?
The input offset voltage drift is ±0.1 µV/°C.
- What is the open-loop gain of the OPA2277U?
The open-loop gain is 134 dB.
- What is the common-mode rejection ratio (CMRR) of the OPA2277U?
The CMRR is 140 dB.
- What is the power-supply rejection ratio (PSRR) of the OPA2277U?
The PSRR is 130 dB.
- What is the input bias current of the OPA2277U?
The input bias current is ±1 nA maximum.
- What is the quiescent current of the OPA2277U?
The quiescent current is 800 µA per amplifier.
- What is the supply voltage range of the OPA2277U?
The supply voltage range is ±2 V to ±18 V.
- What are the typical applications of the OPA2277U?
Typical applications include analog input modules, weigh scales, temperature transmitters, pressure transmitters, data acquisition systems, lab and field instrumentation, and battery testing.
- Is the OPA2277U available in different package types?
Yes, the OPA2277U is available in SOIC (D), among other package types.
