Overview
The OPA4191IPWR from Texas Instruments is a high-performance operational amplifier designed for high-voltage industrial applications. It is part of the OPAx191 family, which includes the OPA191, OPA2191, and OPA4191. These amplifiers are known for their outstanding DC precision and AC performance, making them suitable for a wide range of applications requiring robust and reliable operation.
The OPA4191IPWR is a quad-channel operational amplifier, packaged in a 14-pin TSSOP (Thin Shrink Small Outline Package), and is specified to operate over a temperature range of –40°C to +125°C. It features rail-to-rail input and output, low offset voltage, and high slew rate, among other key characteristics.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | ±18 V | ±2.25 V | ±20 V (±40 V single supply) | V |
| Input Offset Voltage (VOS) | ±5 µV | ±10 µV | ±125 µV | µV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.2 µV/°C | ±0.1 µV/°C | ±1.2 µV/°C | µV/°C |
| Unity Gain Bandwidth (GBW) | 2 MHz | 2.2 MHz | MHz | |
| Slew Rate | 5 V/µs | 5.5 V/µs | 6.5 V/µs | V/µs |
| Output Current (ISC) | ±65 mA | ±30 mA | ±65 mA | mA |
| Capacitive Load Drive | Up to 1 nF | nF | ||
| Quiescent Current per Amplifier (IQ) | 140 µA | 140 µA | 250 µA | µA |
| Thermal Protection | 180 °C | °C |
Key Features
- Rail-to-Rail Input and Output: The OPA4191IPWR offers rail-to-rail input and output, allowing for maximum signal range and flexibility.
- Low Offset Voltage and Drift: With a typical input offset voltage of ±5 µV and a drift of ±0.2 µV/°C, this amplifier ensures high precision over a wide temperature range.
- High Slew Rate: A slew rate of 5 V/µs enables fast signal processing and response times.
- High Output Current: The amplifier can drive high loads with an output current of up to ±65 mA.
- High Capacitive Load Drive: It can drive capacitive loads up to 1 nF, making it suitable for applications requiring high capacitive load handling.
- Differential Input Voltage Range to Supply Rail: This feature allows for a wider range of input signals relative to the supply voltage.
- Thermal Protection: The device includes thermal protection with a threshold of 180 °C and thermal hysteresis of 30 °C.
Applications
- Data Acquisition (DAQ): Suitable for high-precision data acquisition systems due to its low offset voltage and high slew rate.
- Source Measurement Units (SMU): Ideal for source measurement applications requiring high accuracy and stability.
- Pressure Transmitters: Used in pressure measurement systems where high precision and reliability are crucial.
- Train Control and Management Systems: Applied in industrial control systems that require robust and reliable operational amplifiers.
- Lab and Field Instrumentation: Suitable for various laboratory and field instrumentation applications due to its high performance and durability.
Q & A
- What is the typical input offset voltage of the OPA4191IPWR?
The typical input offset voltage is ±5 µV.
- What is the slew rate of the OPA4191IPWR?
The slew rate is 5 V/µs.
- What is the maximum output current of the OPA4191IPWR?
The maximum output current is ±65 mA.
- What is the capacitive load drive capability of the OPA4191IPWR?
The OPA4191IPWR can drive capacitive loads up to 1 nF.
- What is the operating temperature range of the OPA4191IPWR?
The operating temperature range is –40°C to +125°C.
- What is the unity gain bandwidth of the OPA4191IPWR?
The unity gain bandwidth is 2 MHz.
- What type of package does the OPA4191IPWR come in?
The OPA4191IPWR comes in a 14-pin TSSOP package.
- What are some common applications of the OPA4191IPWR?
Common applications include data acquisition, source measurement units, pressure transmitters, train control and management systems, and lab and field instrumentation.
- Does the OPA4191IPWR have thermal protection?
Yes, the OPA4191IPWR includes thermal protection with a threshold of 180 °C and thermal hysteresis of 30 °C.
- What is the quiescent current per amplifier for the OPA4191IPWR?
The quiescent current per amplifier is typically 140 µA.
