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INA139-INA139NA/250-INA139NA/3K
High-Side Measurement Current Shunt Monitor
OUT
GND
Load
1kΩ 1kΩ
VIN+ to60V
VIN+ VIN– 4
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Design
INA139, INA169SBOS181F –DECEMBER 2000–REVISED FEBRUARY 2017
INA1x9 High-Side Measurement Current Shunt Monitor Features Complete Unipolar High-Side Current
Measurement Circuit Wide Supply and Common-Mode Range INA139: 2.7Vto 40V INA169: 2.7Vto 60V Independent Supply and Input Common-Mode
Voltages Single Resistor Gain Set Low Quiescent Current:60 µA (Typical) 5-Pin, SOT-23 Packages
Applications Current Shunt Measurement: Automotive, Telephone, Computers Portable and Battery-Backup Systems Battery Chargers Power Management Cell Phones Precision Current Source
DescriptionThe INA139 and INA169 are high-side, unipolar,
current shunt monitors. Wide input common-mode
voltage range, high-speed, low quiescent current, and
tiny SOT-23 packaging enable useina varietyof
applications.
Input common-mode and power-supply voltages are
independent and can range from 2.7Vto 40V for the
INA139 and 2.7Vto 60V for the INA169. Quiescent
currentis only 60 µA, which permits connecting the
power supply to either side of 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 the INA139 and INA169 are availablein 5-pin
SOT-23 packages. The INA139 deviceis specified for
the –40°C to +125°C temperature range, and the
INA169is specified from –40°Cto +85°C.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Circuit
