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INA168 Datasheet

High Side Measurement Current-Shunt Monitor

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INA138, INA168
SBOS122E – DECEMBER 1999 – REVISED DECEMBER 2017
INA1x8 High-Side Measurement Current Shunt Monitor
1 Features
1 Complete Unipolar High-Side Current
Measurement Circuit
• Wide Supply and Common-Mode Range
• INA138: 2.7 V to 36 V
• INA168: 2.7 V to 60 V
• Independent Supply and Input Common-Mode
Voltages
• Single Resistor Gain Set
• Low Quiescent Current (25 µA Typical)
• Wide Temperature Range: –40°C to +125°C
• 5-Pin SOT-23 Package
2 Applications
• Current Shunt Measurement:
– Telephone, Computers
• Portable and Battery-Backup Systems
• Battery Chargers
• Power Management
• Cell Phones
• Precision Current Source
3 Description
The INA138 and INA168 (INA1x8) are high-side,
unipolar, current shunt monitors. Wide input common-
mode voltage range, low quiescent current, and tiny
SOT-23 packaging enable use in a variety of
applications.
Input common-mode and power-supply voltages are
independent and can range from 2.7 V to 36 V for the
INA138 and 2.7 V to 60 V for the INA168. Quiescent
current is only 25 µA, which permits connecting the
power supply to either side of the current
measurement shunt with minimal error.
The device converts a differential input voltage to a
current output. This current is converted back to a
voltage with an external load resistor that sets any
gain from 1 to over 100. Although designed for
current shunt measurement, the circuit invites
creative applications in measurement and level
shifting.
Both the INA138 and INA168 are available in SOT23-
5 and are specified for the –40°C to 125°C
temperature range.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA138
INA168
SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
VIN+
Up To 60 V
Typical Application Circuit
RS
IS
3
VIN+
5 kΩ
4
VIN–
5 kΩ
Load
V+
5
GND
2
OUT
1
VO = ISRSRL / 5 kΩ
Copyright © 1999, Texas Instruments Incorporated
1
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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INA168 Datasheet Preview

INA168 Datasheet

High Side Measurement Current-Shunt Monitor

No Preview Available !

INA138, INA168
SBOS122E – DECEMBER 1999 – REVISED DECEMBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information ................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 8
7.3 Feature Description................................................... 9
7.4 Device Functional Modes.......................................... 9
8 Application and Implementation ........................ 10
8.1 Application Information............................................ 10
8.2 Typical Applications ............................................... 11
9 Power Supply Recommendations...................... 18
10 Layout................................................................... 18
10.1 Layout Guidelines ................................................. 18
10.2 Layout Example .................................................... 18
11 Device and Documentation Support ................. 19
11.1 Documentation Support ....................................... 19
11.2 Related Links ........................................................ 19
11.3 Receiving Notification of Documentation Updates 19
11.4 Community Resources.......................................... 19
11.5 Trademarks ........................................................... 19
11.6 Electrostatic Discharge Caution ............................ 19
11.7 Glossary ................................................................ 19
12 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (December 2014) to Revision E
Page
• Added reference design link to navigation bar at the top of the front page ........................................................................... 1
• Changed body size from 18.00 mm × 18.00 mm to 2.90 mm × 1.60 mm in Device Information table.................................. 1
• Changed pin numbers in pin functions table to match pin configuration figure...................................................................... 3
• Changed Absolute Maximum Ratings table for clarity; no values were changed ................................................................. 4
• Changed Recommended Operating Conditions table; moved some content from Electrical Characteristics table, but
no values changed ................................................................................................................................................................. 4
• Changed all values in Thermal Information table ................................................................................................................... 5
• Changed Electrical Characteristics table; reformatted for clarity; moved some content to Recommended Operating
Conditions table, and deleted duplicate content..................................................................................................................... 5
• Changed common-mode rejection test conditions to better highlight each device in Electrical Characteristics table .......... 5
• Changed offset voltage vs temperature to offset voltage drift in Electrical Characteristics table........................................... 5
• Changed offset voltage vs power supply test conditions to better highlight each device in Electrical Characteristics table . 5
• Changed reference in text from Figure 10 to Figure 11 in last paragraph of Selecting the Shunt Resistor and RL section 12
Changes from Revision C (November 2005) to Revision D
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section. ................................................................................................ 1
2
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Copyright © 1999–2017, Texas Instruments Incorporated
Product Folder Links: INA138 INA168


Part Number INA168
Description High Side Measurement Current-Shunt Monitor
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