OPA388-Q1 Automotive, Precision, Zero-Drift, Zero-Crossover,

True Rail-to-Rail, Input/Output Operational Amplifier

1 Features

• AEC-Q100 qualified for automotive applications:

• Functional-Safety Capable

– Documentation available to aid functional safety

system design

• Zero drift: ±0.005 µV/°C

• Zero crossover: 140-dB CMRR true RRIO

• Low noise: 7.0 nV√ Hz at 1 kHz

• Fast settling: 2 µs (1 V to 0.01%)

• Gain bandwidth: 10 MHz

• Single supply: 2.5 V to 5.5 V

• Dual supply: ±1.25 V to ±2.75 V

• True rail-to-rail input and output

• EMI/RFI filtered inputs

• Industry-standard package: SOT-23-5

2 Applications

• HEV/EV inverter and motor control

• Battery management system (BMS)

• DC/DC converter

• Onboard (OBC) and wireless charger

3 Description

The OPA388-Q1 precision, operational amplifier is an

automotive, low-noise, fast-settling, zero-drift device

that provides rail-to-rail input and output operation.

Excellent ac performance, combined with only

0.25 µV of offset and 0.005 µV/°C of drift over

temperature, make the OPA388-Q1 a great choice for

driving high-resolution, analog-to-digital converters

(ADCs) with high accuracy. Zero-crossover

technology minimizes any offset change over the

common-mode range. The combination of low drift

and very low 1/f noise allow the OPA388-Q1 to

monitor and detect faulty conditions without

compromising signal integrity.

The OPA388-Q1 is available in the SOT23-5 package.

The device is specified over the industrial temperature

range of –40°C to +125°C.

Device Information (1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

OPA388-Q1

SOT-23 (5)

2.90 mm × 1.60 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

+

+

±

I

LOAD

V

BUS

V

OUT

V

CC

V

CC

V

REF

+

±

V

SHUNT

V

CC

U1A

U1B

R

4

R

SHUNT

R

1

R

3

R

L

R

5

R

6

R

2

The OPA388-Q1 in a Bidirectional Current Shunt

Monitor

±5

±4

±3

±2

±1

0

1

2

3

4

5

±3

±2

±1

0

1

2

3

Input Common-mode Voltage (V)

C003

V

V

The OPA388-Q1 Features Ultra-Low Offset Across

the Full Common-Mode Range

www.ti.com

OPA388-Q1

SBOS989 – AUGUST 2020

Copyright © 2020 Texas Instruments Incorporated

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OPA388-Q1

SBOS989 – AUGUST 2020

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.