Overview
The OPA2131UA is a dual-channel, FET-input operational amplifier produced by Texas Instruments. This device is part of the OPAx131 series, known for its high performance and cost-effectiveness. The OPA2131UA is available in an 8-pin SOIC (D) package, making it suitable for space-saving circuit designs. It offers excellent general-purpose performance, including low offset voltage, low drift, and good dynamic characteristics.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Number of Channels | 2 | |||
| Total Supply Voltage (Dual Supply) | ±4.5 | ±15 | ±18 | V |
| Total Supply Voltage (Single Supply) | 9 | 30 | 36 | V |
| Input Offset Voltage (VOS) | ±0.2 | ±1.5 | mV | |
| Input Offset Voltage Drift (dVOS/dT) | ±2 | ±10 | μV/°C | |
| Input Bias Current (IB) | ±5 | ±50 | pA | |
| Slew Rate | 10 | V/μs | ||
| Bandwidth (GBW) | 4 | MHz | ||
| Common-Mode Rejection Ratio (CMRR) | 70 | 80 | 86 | dB |
| Operating Temperature Range | -55 | 125 | °C | |
| Input Voltage Noise Density (en) at 1 kHz | 15 | nV/√Hz |
Key Features
- FET Input: Low input bias current of 50 pA max.
- Low Offset Voltage: Maximum offset voltage of ±1.5 mV.
- Wide Supply Range: Operates with dual supply voltages from ±4.5V to ±18V and single supply voltages from 9V to 36V.
- High Slew Rate: 10 V/μs.
- Wide Bandwidth: 4 MHz.
- Excellent Capacitive Load Drive: Stable operation with capacitive loads.
- Low Distortion: High fidelity in signal processing.
- Fast Settling Time: Quick response to input changes.
- Great Dynamic Range: High signal-to-noise ratio.
- Current Limiting: Protection against excessive current.
- Pulse Response Stability: Stable operation under pulse conditions.
Applications
- Data Acquisition (DAQ): Suitable for precision data acquisition systems.
- Flow Transmitter: Used in flow measurement and control systems.
- Lab and Field Instrumentation: Ideal for various laboratory and field instrumentation applications.
- Electrocardiogram (ECG): Can be used in medical devices for ECG signal processing.
Q & A
- What is the input bias current of the OPA2131UA?
The input bias current is ±50 pA max.
- What is the typical slew rate of the OPA2131UA?
The typical slew rate is 10 V/μs.
- What is the bandwidth of the OPA2131UA?
The bandwidth is 4 MHz.
- What are the operating temperature ranges for the OPA2131UA?
The operating temperature range is from -55°C to 125°C.
- What is the common-mode rejection ratio (CMRR) of the OPA2131UA?
The CMRR is typically 80 dB.
- Can the OPA2131UA drive capacitive loads?
Yes, it has excellent capacitive load drive capabilities.
- What are the package options for the OPA2131UA?
The OPA2131UA is available in an 8-pin SOIC (D) package.
- What is the maximum input offset voltage of the OPA2131UA?
The maximum input offset voltage is ±1.5 mV.
- What are some typical applications of the OPA2131UA?
Typical applications include data acquisition, flow transmitters, lab and field instrumentation, and electrocardiogram (ECG) systems.
- What is the input voltage noise density of the OPA2131UA at 1 kHz?
The input voltage noise density at 1 kHz is typically 15 nV/√Hz.
