Overview
The OPA2277P is a high-precision operational amplifier from Texas Instruments, part of the OPAx277 series. This series replaces the industry standard OP-177 and offers improved performance with ultra-low offset voltage, ultra-low drift, and high common-mode rejection. The OPA2277P is available in dual versions and is known for its wide supply range, low quiescent current, and excellent dynamic behavior.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VOS) | ±10 | ±20 | ±25 | μV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.1 | ±0.15 | ±0.25 | μV/°C |
| Open-Loop Gain | 134 | dB | ||
| Common-Mode Rejection Ratio (CMRR) | 130 | 140 | dB | |
| Power-Supply Rejection Ratio (PSRR) | 130 | dB | ||
| Bias Current | 1 | nA | ||
| Supply Range | ±2 V | ±18 V | ||
| Quiescent Current | 800 | μA/amplifier | ||
| Common-Mode Voltage Range | (V–) + 2 V | (V+) – 2 V | V |
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)
- Lab and field instrumentation
- Battery testing
Q & A
- What is the input offset voltage of the OPA2277P?
The input offset voltage of the OPA2277P is ±10 μV to ±25 μV. - What is the input offset voltage drift of the OPA2277P?
The input offset voltage drift is ±0.1 μV/°C to ±0.25 μV/°C. - What is the open-loop gain of the OPA2277P?
The open-loop gain is 134 dB. - What is the common-mode rejection ratio (CMRR) of the OPA2277P?
The CMRR is 130 dB to 140 dB. - What is the power-supply rejection ratio (PSRR) of the OPA2277P?
The PSRR is 130 dB. - What is the bias current of the OPA2277P?
The bias current is 1 nA maximum. - What is the supply range of the OPA2277P?
The supply range is ±2 V to ±18 V. - What is the quiescent current of the OPA2277P?
The quiescent current is 800 μA per amplifier. - Is the OPA2277P unity-gain stable?
Yes, the OPA2277P is unity-gain stable and free from phase inversion and overload problems. - What are some common applications of the OPA2277P?
Common applications include analog input modules, weigh scales, temperature transmitters, pressure transmitters, data acquisition (DAQ), lab and field instrumentation, and battery testing.
