Overview
The OPA2277 precision operational amplifier, produced by Texas Instruments, is a high-performance device designed to replace the industry standard OP-177. It offers improved noise characteristics, a wider output voltage swing, and is twice as fast with half the quiescent current compared to its predecessor. The OPA2277 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 | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | TA = 25°C, VS = ±5 V to ±15 V | ±20 | ±25 | ±50 | µV |
| Input Offset Voltage Drift (dVOS/dT) | TA = –40°C to +85°C | ±0.1 | ±0.25 | ±0.5 | µV/°C |
| Input Bias Current (IB) | TJ = –55°C to 125°C | ±0.5 | ±2.8 | ±7 | nA |
| Common-Mode Rejection Ratio (CMRR) | VCM = (V–) + 2 V to (V+) – 2 V | 130 | 140 | dB | |
| Power-Supply Rejection Ratio (PSRR) | VS = ±2 V to ±18 V | ±0.3 | ±1 | µV/V | |
| Quiescent Current (IQ) | IO = 0 A, TJ = –55°C to 125°C | ±790 | ±825 | ±900 | µA |
| Operating Temperature Range | –55 | 125 | °C | ||
| Supply Voltage Range | ±2 | ±18 | 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 unexpected output phase reversal
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 typical input offset voltage of the OPA2277?
The typical input offset voltage of the OPA2277 is ±25 µV.
- What is the input offset voltage drift of the OPA2277?
The input offset voltage drift of the OPA2277 is ±0.1 µV/°C.
- What is the common-mode rejection ratio (CMRR) of the OPA2277?
The CMRR of the OPA2277 is typically 140 dB.
- What is the power-supply rejection ratio (PSRR) of the OPA2277?
The PSRR of the OPA2277 is typically ±1 µV/V.
- What is the quiescent current of the OPA2277?
The quiescent current of the OPA2277 is typically ±825 µA per amplifier.
- What is the operating temperature range of the OPA2277?
The operating temperature range of the OPA2277 is –55°C to 125°C.
- What is the supply voltage range of the OPA2277?
The supply voltage range of the OPA2277 is ±2 V to ±18 V.
- Is the OPA2277 unity-gain stable?
Yes, the OPA2277 is unity-gain stable and free from unexpected output phase reversal.
- What are some 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.
- Does the OPA2277 come in different package options?
Yes, the OPA2277 is available in single, dual, and quad versions, and various package types such as PDIP, SOIC, and VSON.
