Description:

The OPAx991-Q1 series (OPA991-Q1, OPA2991-Q1, and OPA4991-Q1) is a family of high-voltage (40V) general-purpose operational amplifiers designed for automotive applications. These devices offer excellent DC precision and AC performance, including rail-to-rail input and output, low offset voltage (typical ±125µV), low offset drift (typical ±0.3µV/°C), low noise (10.8nV/√Hz and 1.8µVPP), and 4.5MHz bandwidth. Featuring unique capabilities such as differential and common-mode input voltage ranges beyond the supply rails, high output current (±75mA), high slew rate (21V/µs), and high capacitive load drive (1nF), the OPAx991-Q1 is a robust and high-performance operational amplifier suitable for high-voltage automotive applications. The OPAx991-Q1 series op amps are available in standard packages (such as SOT-23, SC70, SOIC, VSSOP, and TSSOP) and are rated for operation from –40°C to 125°C.

Features:

• AEC-Q100 qualified for automotive applications

– Temperature grade 1: –40°C to +125°C, TA

– Device HBM ESD classification level 2A

– Device CDM ESD classification level C6

• Low offset voltage: ±125µV

• Low offset voltage drift: ±0.3µV/°C

• Low noise: 10.8nV/√Hz at 1kHz

• High common-mode rejection: 130dB

• Low bias current: ±10pA

• Rail-to-rail input and output

• High bandwidth: 4.5MHz GBW

• High slew rate: 21V/µs

• High capacitive load drive: 1nF

• Supports multiplexer/comparator inputs

– Amplifiers operate with differential inputs up to the supply rails

– Amplifiers can be used in open-loop or as comparators

• Low quiescent current: 560µA per amplifier

• Wide supply voltage: ±1.35V to ±20V, 2.7V to 40V

• Robust EMIRR performance

Applications:

• Optimized for AEC-Q100 Grade 1 applications

• Infotainment systems and instrument clusters

• Passive safety

• Body electronics and lighting

• Hybrid/electric vehicle inverters and motor control

• On-board chargers (OBC) and wireless chargers

• Powertrain current sensors

• Advanced driver assistance systems (ADAS)

• High-side current sensing