Overview
The OPA2277U/2K5 is a high-precision, low-power operational amplifier produced by Texas Instruments. It is part of the OPAx277 series, which replaces industry-standard op-amps like the OP-177. This device is known for its ultra-low offset voltage and drift, making it ideal for applications requiring high precision and stability.
The OPA2277U/2K5 operates over a wide supply range from ±2 V to ±18 V, offering excellent performance across various supply voltages. It features improved noise, a wider output voltage swing, and is twice as fast with half the quiescent current compared to its predecessors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Offset Voltage (VOS) | ±10 | µV |
| Offset Voltage Drift (dVOS/dT) | ±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 |
| Supply Voltage Range | ±2 V to ±18 V | - |
| Quiescent Current | 800 | µA/amplifier |
| Bandwidth | 1 | MHz |
| Slew Rate | 0.8 | V/µs |
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
- Completely independent circuitry in dual and quad versions for minimal crosstalk
Applications
The OPA2277U/2K5 is suitable for a variety of high-precision applications, including:
- Precision instrumentation and measurement systems
- Medical equipment requiring low noise and high accuracy
- Aerospace and defense systems where reliability and precision are critical
- Industrial control systems that demand high stability and low drift
- Audio and video equipment where high fidelity and low noise are essential
Q & A
- What is the offset voltage of the OPA2277U/2K5?
The offset voltage of the OPA2277U/2K5 is ±10 µV.
- What is the operating temperature range of the OPA2277U/2K5?
The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the OPA2277U/2K5?
The supply voltage range is ±2 V to ±18 V.
- What is the quiescent current of the OPA2277U/2K5?
The quiescent current is 800 µA per amplifier.
- Does the OPA2277U/2K5 have any versions with overvoltage protection?
No, but for similar performance with ±40-V overvoltage protection, you can consider the OPA2206.
- What are the key features of the OPA2277U/2K5?
The key features include ultra-low offset voltage, ultra-low drift, high open-loop gain, high common-mode rejection, and high power-supply rejection.
- Is the OPA2277U/2K5 unity-gain stable?
Yes, the OPA2277U/2K5 is unity-gain stable and provides excellent dynamic behavior over a wide range of load conditions.
- What types of packages are available for the OPA2277U/2K5?
The OPA2277U/2K5 is available in SOIC (D), PDIP (P), and VSON (DRM) packages.
- Can the OPA2277U/2K5 replace other operational amplifiers?
Yes, the OPA2277U/2K5 can replace OP-07, OP-77, and OP-177 operational amplifiers.
- What is the bandwidth of the OPA2277U/2K5?
The bandwidth of the OPA2277U/2K5 is 1 MHz.
- What is the slew rate of the OPA2277U/2K5?
The slew rate of the OPA2277U/2K5 is 0.8 V/µs.
