OPA991
OPA991 is Low-Noise OpAmp manufactured by Texas Instruments.
Features
- Low offset voltage: ±125 µV
- Low offset voltage drift: ±0.3 µV/°C
- Low noise: 10.8 n V/√ Hz at 1 k Hz
- High mon-mode rejection: 130 d B
- Low bias current: ±10 p A
- Rail-to-rail input and output
- Wide bandwidth: 4.5 MHz GBW
- High slew rate: 21 V/µs
- High capacitive load drive: 1 n F
- MUX-friendly/parator inputs
- Amplifier operates with differential inputs up to supply rail
- Amplifier can be used in open-loop or as parator
- Low quiescent current: 560 µA per amplifier
- Wide supply: ±1.35 V to ±20 V, 2.7 V to 40 V
- Robust EMIRR performance: EMI/RFI filters on input and supply pins
- Differential and mon-mode input voltage range to supply rail
2 Applications
- Low-power audio preamplifier
- 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
- High precision parator
3 Description
The OPAx991 family (OPA991, OPA2991, and OPA4991) is a family of high voltage (40-V) general purpose operational amplifiers. These devices offer exceptional DC precision and AC performance, including rail-to-rail input/output, low offset (±125 µV, typ), low offset drift (±0.3 µV/°C, typ), low noise (10.5 n V/√ Hz and 1.8 µVPP) and 4.5-MHz bandwidth.
Unique features such as differential and monmode input-voltage range to the supply rail, high output current (±75 m A), high slew rate (21 V/µs), high capacitive load drive (1 n F) and shutdown functionality make the OPAx991 a robust, highperformance operational amplifier for high-voltage industrial applications.
The OPAx991 family of op amps is available in microsize packages (such as X2QFN, WSON, and SOT-553), as well as standard packages (such as SOT-23, SOIC, and TSSOP), and is specified from
- 40°C to 125°C.
Device Information
PART NUMBER (1)
PACKAGE
SOT-23 (5)
SOT-23 (6)
SC70 (5)
SOIC (8)
SOT-23-8...
