Overview
The OPA2991IDDFR, produced by Texas Instruments, is a high-voltage, general-purpose operational amplifier. 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 OPA2991IDDFR features rail-to-rail input and output, low offset voltage, low noise, and high common-mode rejection ratio, among other key characteristics.
Key Specifications
| Specification | Value |
|---|---|
| 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 |
| Supply Voltage Range | ±1.35 V to ±20 V, 2.7 V to 40 V |
| Quiescent Current | 560 µA per amplifier |
| Operating Temperature Range | –40°C to 125°C |
Key Features
- Rail-to-rail input and output
- Differential and common-mode input voltage range to supply rail
- High output current (±75 mA)
- High slew rate (21 V/µs)
- High capacitive load drive (1 nF)
- Low quiescent current (560 µA per amplifier)
- Robust EMI/RFI filters on input and supply pins
- Shutdown functionality
- Available in various packages including SOIC, SOT-23, TSSOP, and X2QFN
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 differential swing the OPA2991IDDFR can tolerate?
The OPA2991IDDFR can tolerate a maximum differential swing of up to 40 V.
- What is the typical offset voltage of the OPA2991IDDFR?
The typical offset voltage is ±125 µV.
- What is the common-mode rejection ratio of the OPA2991IDDFR?
The common-mode rejection ratio is 130 dB.
- What is the bandwidth of the OPA2991IDDFR?
The bandwidth is 4.5 MHz GBW.
- What is the slew rate of the OPA2991IDDFR?
The slew rate is 21 V/µs.
- What is the capacitive load drive capability of the OPA2991IDDFR?
The capacitive load drive capability is up to 1 nF.
- What is the supply voltage range for the OPA2991IDDFR?
The supply voltage range is ±1.35 V to ±20 V, and 2.7 V to 40 V.
- What is the quiescent current per amplifier for the OPA2991IDDFR?
The quiescent current per amplifier is 560 µA.
- What are some common applications for the OPA2991IDDFR?
Common 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 packages is the OPA2991IDDFR available in?
The OPA2991IDDFR is available in various packages including SOIC, SOT-23, TSSOP, and X2QFN.
