OPA991-Q1, OPA2991-Q1, OPA4991-Q1
SBOSA12D – MARCH 2020 – REVISED SEPTEMBER 2021
OPAx991-Q1 Automotive, 40-V Rail-to-Rail Input/Output, Low Offset Voltage,
Low Noise Op Amp
1 Features
3 Description
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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: ±125 µV
Low offset voltage drift: ±0.3 µV/°C
Low noise: 10.8 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
The OPAx991-Q1 family (OPA991-Q1, OPA2991-Q1,
and OPA4991-Q1) is a family of high voltage (40 V)
general purpose operational amplifiers for automotive
application. 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 (10.8 nV/√Hz and 1.8
µVPP), and 4.5-MHz bandwidth.
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Unique features such as differential and common-
mode input-voltage range to the supply rail, high
output current (±75 mA), high slew rate (21 V/µs), and
high capacitive load drive (1 nF) make the OPAx991-
Q1 a robust, high-performance operational amplifier
for high-voltage automotive applications.
The OPAx991-Q1 family of op amps is available in
standard packages (such as SOT-23, SOIC, VSSOP,
and TSSOP) and is specified from –40°C to 125°C.
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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
Device Information
PART NUMBER(1)
PACKAGE
BODY SIZE (NOM)
2.90 mm × 1.60 mm
4.90 mm × 3.90 mm
3.00 mm × 3.00 mm
8.65 mm × 3.90 mm
4.20 mm × 1.90 mm
5.00 mm × 4.40 mm
OPA991-Q1
SOT-23 (5)
SOIC (8)
OPA2991-Q1
OPA4991-Q1
2 Applications
VSSOP (8)
SOIC (14)
SOT-23 (14)
TSSOP (14)
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Optimized for AEC-Q100 grade 1 applications
Infotainment and cluster
Passive safety
Body electronics and lighting
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
HEV/EV inverter and motor control
On-board (OBC) and wireless charger
Powertrain current sensor
Advanced driver assistance systems (ADAS)
High-side current sensing
Analog Inputs
REF3140
RC Filter
OPA375
RC Filter
Bridge Sensor
Reference Driver
Gain Network
Gain Network
OPA991
+
MUX509
Thermocouple
REF
+
VINP
OPA991
Gain Network
Antialiasing
Filter
OPA991
+
ADS8860
Current Sensing
Photo
VINM
Detector
LED
High-Voltage Multiplexed Input
High-Voltage Level Translation
VCM
Optical Sensor
OPAx991-Q1 in a High-Voltage Signal Chain
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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