INA138-Q1 Datasheet, PDF (1/19 Pages) Texas Instruments – HIGH-SIDE MEASUREMENT CURRENT SHUNT MONITOR

INA138-Q1, IN168-Q1
www.ti.com
SGLS174D – SEPTEMBER 2003 – REVISED DECEMBER 2010
HIGH-SIDE MEASUREMENT CURRENT SHUNT MONITOR
Check for Samples: INA138-Q1, IN168-Q1
FEATURES
1
• Qualified For Automotive Applications
• ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
• 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 typ)
• Wide Temperature Range: –40°C to +125°C
• TSSOP−8 and SOT23−5 Packages
APPLICATIONS
• Current Shunt Measurement
• Portable And Battery-Backup Systems
• Battery Chargers
• Power Management
• Precision Current Source
DESCRIPTION
The INA138 and INA168 are high-side, unipolar,
current shunt monitors. Wide input common-mode
voltage range, low quiescent current, and tiny TSSOP
and SOT23 packaging enable uses 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 mA, 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
TSSOP−8 and SOT23−5 and are specified for the
–40°C to +125°C temperature range.
W
W
NC − No internal connection
W
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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