Overview
The OPA2991IDR is a dual, 40-V, 4.5-MHz, low-power operational amplifier produced by Texas Instruments. It is part of the OPAx991 family, which includes the OPA991, OPA2991, and OPA4991. These devices are designed for high-voltage industrial applications and offer exceptional DC precision and AC performance. The OPA2991IDR features rail-to-rail input and output, low offset voltage, low noise, and high common-mode rejection, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage Range | ±1.35 V to ±20 V, 2.7 V to 40 V |
| Offset Voltage | ±125 µV (typical) |
| Offset Voltage Drift | ±0.3 µV/°C (typical) |
| Noise | 10.8 nV/√Hz at 1 kHz |
| Common-Mode Rejection Ratio | 130 dB |
| Bias Current | ±10 pA |
| Bandwidth | 4.5 MHz GBW |
| Slew Rate | 21 V/µs |
| Capacitive Load Drive | 1 nF |
| Output Current | ±75 mA |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | 8-pin SOIC (D) |
Key Features
- Rail-to-rail input and output
- Low offset voltage: ±125 µV (typical)
- Low offset voltage drift: ±0.3 µV/°C (typical)
- Low noise: 10.8 nV/√Hz at 1 kHz
- High common-mode rejection: 130 dB
- Low bias current: ±10 pA
- High slew rate: 21 V/µs
- High capacitive load drive: 1 nF
- MUX-friendly/comparator inputs
- Differential and common-mode input voltage range to supply rail
- Low quiescent current: 560 µA per amplifier
- Robust EMIRR performance: EMI/RFI filters on input and supply pins
- Shutdown functionality
Applications
- Low-vibration transducer signal processing
- Low-noise programmable gain amplifiers
- Current loop sensing
- Medical instrumentation
- Microphone pre-amplification
- 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 OPA2991IDR?
The OPA2991IDR can operate with a supply voltage range of ±1.35 V to ±20 V, and 2.7 V to 40 V.
- What is the typical offset voltage of the OPA2991IDR?
The typical offset voltage is ±125 µV.
- What is the common-mode rejection ratio (CMRR) of the OPA2991IDR?
The CMRR is 130 dB.
- What is the bandwidth of the OPA2991IDR?
The bandwidth is 4.5 MHz GBW.
- Can the OPA2991IDR drive high capacitive loads?
Yes, it can drive capacitive loads up to 1 nF.
- What is the operating temperature range of the OPA2991IDR?
The operating temperature range is -40°C to 125°C.
- What package types are available for the OPA2991IDR?
The OPA2991IDR is available in an 8-pin SOIC (D) package, among other package types like X2QFN and WSON.
- Does the OPA2991IDR have shutdown functionality?
Yes, the OPA2991IDR has shutdown functionality.
- What are some typical applications of the OPA2991IDR?
Typical applications include low-vibration transducer signal processing, medical instrumentation, microphone pre-amplification, and more.
- How much current does the OPA2991IDR consume in quiescent mode?
The quiescent current is 560 µA per amplifier.
