Overview
The OPA2277U/2K5G4 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 are known for their ultra-low offset voltage and drift, making them ideal for applications requiring high precision and stability. The OPA2277U/2K5G4 offers improved noise performance, a wider output voltage swing, and is twice as fast as the OP-177 with half the quiescent current.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Offset Voltage | 10 | μV |
| Offset Voltage Drift | ±0.1 | μV/°C |
| Open-Loop Gain | 134 | dB |
| Common-Mode Rejection Ratio (CMRR) | 140 | dB |
| Power-Supply Rejection Ratio (PSRR) | 130 | dB |
| Bias Current | 1 | nA (maximum) |
| Supply Voltage Range | ±2 V to ±18 V | V |
| Quiescent Current | 800 | μA/amplifier |
| Package Types | SOIC (8-pin), PDIP (8-pin), VSON (8-pin) | |
| Package Dimensions (SOIC) | 3.91 mm × 4.90 mm | |
| Package Dimensions (PDIP) | 6.35 mm × 9.81 mm |
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 unexpected output phase reversal
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 offset voltage of the OPA2277U/2K5G4?
The offset voltage is 10 μV.
- What is the drift of the offset voltage over temperature?
The drift is ±0.1 μV/°C.
- What is the open-loop gain of the OPA2277U/2K5G4?
The open-loop gain is 134 dB.
- What is the common-mode rejection ratio (CMRR) of this amplifier?
The CMRR is 140 dB.
- What is the power-supply rejection ratio (PSRR) of this amplifier?
The PSRR is 130 dB.
- What are the available package types for the OPA2277U/2K5G4?
The available package types are SOIC (8-pin), PDIP (8-pin), and VSON (8-pin).
- What are the dimensions of the SOIC package?
The dimensions of the SOIC package are 3.91 mm × 4.90 mm.
- What are the typical applications of the OPA2277U/2K5G4?
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/2K5G4 unity-gain stable?
- What is the quiescent current of the OPA2277U/2K5G4?
The quiescent current is 800 μA per amplifier.
