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INA168QPWRQ1
Automotive Catalog High-Side Measurement Current Shunt Monitor, Current Output
Up to 60 V
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INA138-Q1, INA168-Q1SGLS174I –SEPTEMBER 2003–REVISED JANUARY 2018
INA1x8-Q1 Automotive-Grade, High-Side, Current-Output, Current-Shunt Monitor Features Qualifiedfor Automotive Applications AEC-Q100 Qualified With the Following Results: Device Temperature Grade1: –40°Cto 125°C
Ambient Operating Temperature Range Device HBM ESD Classification Level2 Device CDM ESD Classification Level C6 Complete Unipolar High-Side Current-
Measurement Circuit Wide Supply and Common-Mode Ranges: INA138-Q1: 2.7Vto36V INA168-Q1: 2.7Vto60V Independent Supply and Input Common-Mode
Voltages Single Resistor Gain Set Low Quiescent Current (25 µA Typical) Wide Temperature Range: –40°Cto +125°C Packages: TSSOP-8, SOT-23-5 (INA168-Q1)
Applications Electric Power Steering (EPS) Systems Body Control Modules Brake Systems Electronic Stability Control (ESC) Systems
DescriptionThe INA138-Q1 and INA168-Q1 (INA1x8-Q1) devices
are high-side, unidirectional, current sense amplifiers.
Wide input common-mode voltage range, low
quiescent current, and TSSOP and SOT-23
packaging enable useina varietyof applications.
Input common-mode and power-supply voltages are
independent, and range from 2.7Vto 36V for the
INA138-Q1, and 2.7Vto 60V for the INA168-Q1.
Quiescent current is only 25 μA, which permits
connecting the power supplyto either sideof the
current-measurement shunt with minimal error.
The device convertsa differential input voltagetoa
current output. This currentis converted backtoa
voltage with an external load resistor that sets any
gain from1 to over 100. Although designed for
current shunt measurement, the circuit invites
creative applications in measurement and level
shifting.
Both devices are availableina TSSOP-8 package.
The INA168-Q1is also available ina SOT-23-5
package. Both devices are specified for the –40°Cto
+125°C temperature range.
Device Information(1)(1) Forall available packages, seethe package option addendumthe endofthe data sheet.
Typical Application Circuit
