Overview
The OPA191IDR from Texas Instruments is a high-performance, low-power, precision operational amplifier. It is part of the OPAx191 family, which includes the OPA191, OPA2191, and OPA4191. This device is designed to offer outstanding DC precision and AC performance, making it suitable for a wide range of high-voltage industrial applications. The OPA191IDR features Texas Instruments' proprietary e-trim technology, which ensures precise internal device parameter trimming during manufacturing. This amplifier is available in standard packages and is specified to operate over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | ±18 V (36 V single supply) | 4.5 V (±2.25 V) | 36 V (±18 V) | V |
| Input Offset Voltage (VOS) | ±5 µV | ±5 µV | ±25 µV | µV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.2 µV/°C | ±0.1 µV/°C | ±1.2 µV/°C | µV/°C |
| Open-Loop Gain (AOL) | 134 dB | 124 dB | 134 dB | dB |
| Unity Gain Bandwidth (GBW) | 2.2 MHz | - | - | MHz |
| Slew Rate | 5 V/µs | 5.5 V/µs (rising), 6.5 V/µs (falling) | - | V/µs |
| Output Current | ±65 mA | - | - | mA |
| Capacitive Load Drive | Up to 1 nF | - | - | nF |
| Operating Temperature Range | -40°C to +125°C | -40°C | +125°C | °C |
Key Features
- Rail-to-rail input and output
- Low input offset voltage (±5 µV typical) and low offset drift (±0.2 µV/°C typical)
- High output current (±65 mA) and high capacitive load drive (up to 1 nF)
- High slew rate (5 V/µs)
- Differential input-voltage range to the supply rail
- High common-mode rejection ratio (CMRR) and high open-loop gain (134 dB typical)
- Thermal protection with thermal hysteresis
- Available in standard packages such as SOIC, VSSOP, and SOT
Applications
- Data acquisition (DAQ) and source measurement units (SMU)
- Pressure transmitters and other industrial sensors
- Train control and management systems
- Lab and field instrumentation
Q & A
- What is the typical input offset voltage of the OPA191IDR?
The typical input offset voltage of the OPA191IDR is ±5 µV.
- What is the operating temperature range of the OPA191IDR?
The OPA191IDR operates over a temperature range of –40°C to +125°C.
- What is the maximum output current of the OPA191IDR?
The maximum output current of the OPA191IDR is ±65 mA.
- What is the unity gain bandwidth of the OPA191IDR?
The unity gain bandwidth of the OPA191IDR is 2.2 MHz.
- What are the typical applications of the OPA191IDR?
The OPA191IDR is typically used in data acquisition, source measurement units, pressure transmitters, train control systems, and lab and field instrumentation.
- What is the slew rate of the OPA191IDR?
The slew rate of the OPA191IDR is 5 V/µs.
- What is the common-mode rejection ratio (CMRR) of the OPA191IDR?
The CMRR of the OPA191IDR is typically 96 dB to 120 dB depending on the conditions.
- What packages are available for the OPA191IDR?
The OPA191IDR is available in standard packages such as SOIC, VSSOP, and SOT).
- Does the OPA191IDR have thermal protection?
Yes, the OPA191IDR has thermal protection with a thermal hysteresis of 30°C).
- What is the capacitive load drive capability of the OPA191IDR?
The OPA191IDR can drive capacitive loads up to 1 nF).
