Copyright © 2016, Texas Instruments Incorporated

INA203-Q1

x20

3 m

Load Supply

±16V to +80V

Load

5V Supply

Optional Delay

Capacitor

0.2 …F

C

BYPASS

0.01 …F

VS

OUT

CMP1 IN-/0.6 REF

CMP1 IN+

CMP2 IN+

CMP2 IN-/0.6 REF

GND

VIN+

VIN-

1.2V REF OUT

CMP1 OUT

CMP2 OUT

CMP2 DELAY

CMP1RESET

Current Shunt

Monitor Output

1.2V REF

4.7 k

Ÿ

4.7 k

Ÿ

Transparent/Reset

Latch

RSHUNT

R

PULL-UP

R

PULL-UP

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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.

INA203-Q1

SBOS539A – DECEMBER 2010 – REVISED APRIL 2016

INA203-Q1 Automotive Grade, –16 V to +80 V, Low- or High-Side, High-Speed, Voltage

Output Current Shunt Monitor With Dual Comparators and Reference

1

1 Features

1

•

Qualified for Automotive Applications

•

Current Sense Amplifier

–

Common-Mode Range: –16 V to +80 V

–

Accuracy: 3.5% (Maximum) Over Temperature

–

Bandwidth: 500 kHz

–

Gain: 20 V/V

•

Integrated Dual Comparators:

–

Comparator 1 With Latch

–

Comparator 2 With Optional Delay

•

Quiescent Current: 1.8 mA

•

Latch-Up Performance Meets 100 mA Per AEC-

Q100, Level I

•

Packages: TSSOP-14

2 Applications

•

Electric Power Steering (EPS) Systems

•

Body Control Modules

•

Brake Systems

•

Electronic Stability Control (ESC) Systems

3 Description

The INA203-Q1 is a unidirectional current-shunt

monitor (also called a current sense amplifier) with

voltage

output,

dual

comparators,

and

voltage

reference. The INA203-Q1 can sense drops across

shunts at common-mode voltages from –16 V to +80

V. The INA203-Q1 is available with 20-V/V gain with

up to 500-kHz bandwidth.

The

INA203-Q1

incorporates

two

open-drain

comparators with internal 0.6-V references and also

provides a 1.2-V reference output. The comparator

references can be overridden by external inputs.

Comparator 1 includes a latching capability, and

Comparator 2 has a user-programmable delay.

The INA203-Q1 operates from a single 2.7 V to 18 V

supply. It is specified over the extended operating

temperature range of –40°C to +125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA203-Q1

TSSOP (14)

5.00 mm × 4.40 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Basic Connections Schematic