1 Features

• Wide supply voltage: 2.7V to 32V

• Rail-to-rail input and output

• Wide bandwidth: 24MHz GBW, unity-gain stable

• Unlimited capacitive load drive capability

– Phase margin of 50° when driving a load of

10μF and 1MΩ

• High output current drive: ±125mA

• Low offset voltage: ±350μV (typical)

• Low offset voltage drift: ±2.5μV/°C (typical)

• Low noise: 12nV/√Hz at 1kHz

• High common-mode rejection: 125dB

• High slew rate: 35V/μs

• Low quiescent current: 1.35mA per amplifier

2 Applications

• Optimized for AEC-Q100 grade 1 applications

• HEV/EV inverter and motor control

• HEV/EV DC/DC converter

• On-board charger (OBC) and wireless charger

• AC charging (pile) station

• GFCI fault detection and test

• Software defined radio

• High-side and low-side current sensing

3 Description

The OPAx994-Q1 family (OPA994-Q1 and OPA2994-

Q1) is a family of high voltage (32V) rail-to-rail

input and output (RRIO) operational amplifiers. These

devices offer excellent AC performance, including a

wide unity gain bandwidth of 24MHz and a high

slew rate of 35V/μs, while only requiring a quiescent

current of 1.35mA per channel.

The OPAx994-Q1 family was designed to maintain

stability across a wide range of capacitive loads. For

example, OPAx994-Q1 is able to achieve a phase

margin of 50 degrees when driving large capacitive

loads of 10μF with a load resistance of 1MΩ.

The OPAx994-Q1 is designed with compensation

architectures that mitigate sustained ringing for large

capacitive loads. This allows for reliable performance

and ease of design for systems that have large,

varying, or unknown capacitive loads.

These devices also offer excellent DC precision,

including a high short-circuit output current of 125mA/

channel, low offset voltage (±350μV, typical), low

offset drift (±2.5μV/°C, typical), and high CMRR of

125dB for high voltage operation within the main

input pair. This makes the OPAx994-Q1 a flexible,

robust, and high-performance op amp for high-voltage

automotive applications.