Overview
The OPA277PA is a precision operational amplifier from Texas Instruments, part of the OPAx277 series. These devices are designed to replace industry-standard op-amps like the OP-177, offering improved noise performance, wider output voltage swing, and twice the speed with half the quiescent current. The OPA277PA operates from ±2-V to ±18-V supplies, maintaining high performance across a wide supply range and temperature conditions.
The OPA277PA is known for its ultra-low offset voltage and drift, low bias current, high common-mode rejection, and high power-supply rejection. It is unity-gain stable and free from phase inversion and overload problems, making it suitable for a variety of applications.
Key Specifications
| Parameter | Typical Value | Maximum Value | Units |
|---|---|---|---|
| Input Offset Voltage (VOS) | ±10 µV | ±20 µV | µV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.1 µV/°C | ±0.15 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 | |
| Bias Current | 1 nA | nA | |
| Supply Voltage Range | ±2 V to ±18 V | V | |
| Quiescent Current per Amplifier | 800 µA | µA | |
| Gain Bandwidth Product | 1 MHz | MHz | |
| Slew Rate | 0.8 V/µs | V/µs | |
| Operating Temperature Range | -40°C to +85°C | °C | |
| Package Type | PDIP (8-pin) |
Key Features
- Ultra-low offset voltage: 10 µV typical, ensuring high precision in applications.
- Ultra-low drift: ±0.1 µV/°C, maintaining stability over temperature changes.
- High open-loop gain: 134 dB, providing high accuracy in amplification.
- High common-mode rejection: 140 dB, minimizing the impact of common-mode signals.
- High power-supply rejection: 130 dB, reducing the influence of power supply noise.
- Low bias current: 1 nA maximum, suitable for high-impedance sources.
- Wide supply range: ±2 V to ±18 V, flexible for various power supply configurations.
- Low quiescent current: 800 µA per amplifier, efficient power consumption.
- Single, dual, and quad versions: Versatile options for different application needs.
- Unity-gain stable: No phase inversion or overload problems, easy to use in various circuits.
- External trim pins (for OPA277): For special applications requiring offset voltage adjustment.
Applications
- Analog input modules: For precise signal conditioning and amplification.
- Weigh scales: High accuracy required for weight measurement.
- Temperature transmitters: Stable and precise temperature measurement and transmission.
- Pressure transmitters: Accurate pressure measurement and transmission.
- Data acquisition (DAQ): For precise data collection in various industrial and scientific applications.
- Lab and field instrumentation: General-purpose use in laboratory and field instruments requiring high precision.
- Battery test equipment: For precise voltage and current measurements in battery testing.
Q & A
- What is the typical input offset voltage of the OPA277PA?
The typical input offset voltage is ±10 µV.
- What is the operating temperature range of the OPA277PA?
The operating temperature range is -40°C to +85°C.
- What is the gain bandwidth product of the OPA277PA?
The gain bandwidth product is 1 MHz).
- Does the OPA277PA have external trim pins for offset voltage adjustment?
- What is the common-mode rejection ratio (CMRR) of the OPA277PA?
The CMRR is 140 dB).
- What is the power supply rejection ratio (PSRR) of the OPA277PA?
The PSRR is 130 dB).
- Is the OPA277PA unity-gain stable?
- What are the package options available for the OPA277PA?
The OPA277PA is available in an 8-pin PDIP package).
- What is the slew rate of the OPA277PA?
The slew rate is 0.8 V/µs).
- Can the OPA277PA operate with different supply voltages?
