Overview
The OPA991SIDBVR is a high-voltage, general-purpose operational amplifier from Texas Instruments, part of the OPAx991 family (including OPA991, OPA2991, and OPA4991). This device is designed for high-voltage industrial applications, offering exceptional DC precision and AC performance. It features rail-to-rail input/output, low offset voltage, low noise, and a wide bandwidth, making it a robust and high-performance solution for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Offset Voltage | ±125 µV | |
| Input Offset Voltage Drift | ±0.3 µV/°C | |
| Input Noise Voltage | 10.5 nV/√Hz at 1 kHz | |
| Bandwidth | 4.5 MHz | |
| Slew Rate | 21 V/µs | |
| Output Current | ±75 mA | |
| Capacitive Load Drive | 1 nF | |
| Supply Voltage Range | ±1.35 V to ±20 V, 2.7 V to 40 V | |
| Operating Temperature Range | –40°C to 125°C | |
| Package/Case | SOT-23 (DBV)-6 |
Key Features
- Low offset voltage: ±125 µV
- Low offset voltage drift: ±0.3 µV/°C
- Low noise: 10.5 nV/√Hz at 1 kHz
- High common-mode rejection: 130 dB
- Low bias current: ±10 pA
- Rail-to-rail input and output
- Wide bandwidth: 4.5 MHz GBW
- High slew rate: 21 V/µs
- High capacitive load drive: 1 nF
- MUX-friendly/comparator inputs
- Amplifier operates with differential inputs up to supply rail
- Amplifier can be used in open-loop or as comparator
- 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
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
- Medical devices
- Automotive electronics
- Industrial control systems
Q & A
- What is the input offset voltage of the OPA991SIDBVR?
The input offset voltage is typically ±125 µV.
- What is the bandwidth of the OPA991SIDBVR?
The bandwidth is 4.5 MHz.
- What is the slew rate of the OPA991SIDBVR?
The slew rate is 21 V/µs.
- What is the maximum output current of the OPA991SIDBVR?
The maximum output current is ±75 mA.
- What is the operating temperature range of the OPA991SIDBVR?
The operating temperature range is –40°C to 125°C.
- What package types are available for the OPA991SIDBVR?
The device is available in micro-size packages (such as X2QFN and WSON) and standard packages (such as SOT-23, SOIC, and TSSOP).
- What are some common applications of the OPA991SIDBVR?
Common applications include low-power audio preamplifiers, multiplexed data-acquisition systems, test and measurement equipment, and industrial control systems.
- Does the OPA991SIDBVR have shutdown functionality?
- What is the supply voltage range for the OPA991SIDBVR?
The supply voltage range is ±1.35 V to ±20 V, or 2.7 V to 40 V.
- Is the OPA991SIDBVR robust against electromagnetic interference?
