Overview
The OPA2991IDGKR is a high-voltage, general-purpose operational amplifier from Texas Instruments. It is part of the OPAx991 family, which includes the OPA991 and OPA4991. This device is known for its exceptional DC precision and AC performance, making it suitable for a wide range of high-voltage industrial applications. The OPA2991IDGKR offers rail-to-rail input and output, low offset voltage, low noise, and high common-mode rejection ratio, among other key features. It is available in various packages, including SOIC, SOT-23, TSSOP, and VSSOP, and operates over a temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | ±1.35 V to ±20 V, 2.7 V to 40 V | V |
| Offset Voltage | ±125 µV | µV |
| Offset Voltage Drift | ±0.3 µV/°C | µV/°C |
| Noise | 10.8 nV/√Hz at 1 kHz | nV/√Hz |
| Common-Mode Rejection Ratio | 130 dB | dB |
| Bias Current | ±10 pA | pA |
| Bandwidth | 4.5 MHz GBW | MHz |
| Slew Rate | 21 V/µs | V/µs |
| Capacitive Load Drive | 1 nF | nF |
| Quiescent Current | 560 µA per amplifier | µA |
| Operating Temperature Range | –40°C to 125°C | °C |
Key Features
- Rail-to-rail input and output
- Low offset voltage: ±125 µV
- Low offset voltage drift: ±0.3 µV/°C
- Low noise: 10.8 nV/√Hz at 1 kHz
- High common-mode rejection ratio: 130 dB
- Low bias current: ±10 pA
- Wide bandwidth: 4.5 MHz GBW
- High slew rate: 21 V/µs
- High capacitive load drive: 1 nF
- MUX-friendly/comparator inputs
- Low quiescent current: 560 µA per amplifier
- Robust EMIRR performance: EMI/RFI filters on input and supply pins
- Differential and common-mode input voltage range to supply rail
- Shutdown functionality
Applications
- Low-power audio preamplifiers
- Multiplexed data-acquisition systems
- Test and measurement equipment
- ADC driver amplifiers
- SAR ADC reference buffers
- Programmable logic controllers
- High-side and low-side current sensing
Q & A
- What is the maximum supply voltage for the OPA2991IDGKR?
The maximum supply voltage range is ±20 V, and the device can also operate from 2.7 V to 40 V.
- What is the typical offset voltage of the OPA2991IDGKR?
The typical offset voltage is ±125 µV.
- What is the common-mode rejection ratio of the OPA2991IDGKR?
The common-mode rejection ratio is 130 dB.
- What is the bandwidth of the OPA2991IDGKR?
The bandwidth is 4.5 MHz GBW.
- Can the OPA2991IDGKR drive high capacitive loads?
Yes, it can drive capacitive loads up to 1 nF.
- What is the quiescent current of the OPA2991IDGKR per amplifier?
The quiescent current is 560 µA per amplifier.
- Does the OPA2991IDGKR have shutdown functionality?
Yes, it has shutdown functionality.
- What are the typical applications of the OPA2991IDGKR?
Typical applications include low-power audio preamplifiers, multiplexed data-acquisition systems, test and measurement equipment, ADC driver amplifiers, SAR ADC reference buffers, programmable logic controllers, and high-side and low-side current sensing.
- What is the operating temperature range of the OPA2991IDGKR?
The operating temperature range is –40°C to 125°C.
- What packages are available for the OPA2991IDGKR?
The device is available in SOIC, SOT-23, TSSOP, and VSSOP packages.
