INA170EA250 Burr-Brown Corporation, INA170EA250 Datasheet

no-image

INA170EA250

Manufacturer Part Number
INA170EA250
Description
High-Side/ Bidirectional CURRENT SHUNT MONITOR
Manufacturer
Burr-Brown Corporation
Datasheet
FEATURES
APPLICATIONS
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
COMPLETE BIDIRECTIONAL CURRENT
MEASUREMENT CIRCUIT
WIDE SUPPLY RANGE: 2.7V to 40V
SUPPLY-INDEPENDENT COMMON-MODE
VOLTAGE: 2.7V TO 60V
RESISTOR PROGRAMMABLE GAIN SET
LOW QUIESCENT CURRENT: 75 A (typ)
MSOP-8 PACKAGE
CURRENT SHUNT MEASUREMENT:
Automotive, Telephone, Computers, Power
Systems, Test, General Instrumentation
PORTABLE AND BATTERY-BACKUP
SYSTEMS
BATTERY CHARGERS
POWER MANAGEMENT
CELL PHONES
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
I
S
V
CURRENT SHUNT MONITOR
Load
SUPPLY
R
S
High-Side, Bidirectional
V
V
V
R
REF
IN
IN
OS
+
R
OS
5
2
1
3
www.ti.com
A2
1k
1k
R
R
G1
G2
DESCRIPTION
The INA170 is a high-side, bidirectional current shunt
monitor featuring a wide input common-mode voltage range,
low quiescent current, and a tiny MSOP-8 package.
Bidirectional current measurement is accomplished by out-
put offsetting. The offset voltage level is set with an external
resistor and voltage reference. This permits measurement of
a bidirectional shunt current while using a single supply for
the INA170.
Input common-mode and power-supply voltages are inde-
pendent. Input voltage can range from +2.7V to +60V on
any supply voltage from +2.7V to +40V. Low 10 A input
bias current adds minimal error to the shunt current.
The INA170 converts a differential input voltage to a
current output. This current develops a voltage across an
external load resistor, setting any gain from 1 to over 100.
The INA170 is available in an MSOP-8 package, and is
specified over the extended industrial temperature range,
–40 C to +85 C with operation from –55 C to +125 C.
V+
Q2
8
A1
GND
INA170
Copyright © 2001-2004, Texas Instruments Incorporated
4
SBOS193B – MARCH 2001 – REVISED JUNE 2004
Q1
6
OUT
R
L
INA170

Related parts for INA170EA250

INA170EA250 Summary of contents

Page 1

High-Side, Bidirectional CURRENT SHUNT MONITOR FEATURES COMPLETE BIDIRECTIONAL CURRENT MEASUREMENT CIRCUIT WIDE SUPPLY RANGE: 2.7V to 40V SUPPLY-INDEPENDENT COMMON-MODE VOLTAGE: 2.7V TO 60V RESISTOR PROGRAMMABLE GAIN SET LOW QUIESCENT CURRENT (typ) MSOP-8 PACKAGE APPLICATIONS CURRENT SHUNT MEASUREMENT: Automotive, ...

Page 2

PACKAGE/ORDERING INFORMATION PRODUCT PACKAGE INA170EA MSOP-8 " " NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “INA170NA/2K5” will get ...

Page 3

ELECTRICAL CHARACTERISTICS + – 12V PARAMETER INPUT Full-Scale Sense (Input) Voltage Common-Mode Input Range Common-Mode Rejection (1) Offset Voltage RTI vs Temperature vs Power ...

Page 4

TYPICAL CHARACTERISTICS + + 5V 12V 25k , unless otherwise noted GAIN vs FREQUENCY 10k ...

Page 5

TYPICAL CHARACTERISTICS + + 5V 12V 25k , unless otherwise noted STEP RESPONSE 1. 100 0. 100 0V 20 s/div INA170 SBOS193B ...

Page 6

OPERATION Figure 1 shows the basic circuit diagram for the INA170. Load current I is drawn from supply V S resistor R . The voltage drop in shunt resistor V S across R by the internal op-amp, causing current to ...

Page 7

R minimize voltage loss in the supply line. For most S applications, best performance is attained with an R that provides a full-scale shunt voltage of 50mV to 100mV. ...

Page 8

I = 10A S 0.0125 28V V = 125mV Full-Scale +2.5V FIGURE 5. Bipolar Current Measurement. 8 +5V Load 0 – INA170 I OUT ...

Page 9

...

Page 10

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the ...

Related keywords