Texas Instruments INA139
The INA139 and INA169 are high-side, unipolar, current shunt monitors. The device converts a differential input voltage to a current output. Input common-mode and power-supply voltages are independent and can range from 2.7 V to 40 V for the INA139 and 2.7 V to 60 V for the INA169.| Part No. | INA139 |
|---|---|
| Datasheet | INA139 Download |
| Manufacturer |  Texas Instruments |
| Description | High-Side Measurement Current-Shunt Monitor |
| Buy | Stock & Price |
FEATURES
●1 Complete Unipolar High-Side Current Measurement Circuit● Wide Supply and Common-Mode Range
● INA139: 2.7 V to 40 V
● INA169: 2.7 V to 60 V
● Independent Supply and Input Common-Mode Voltages
● Single Resistor Gain Set
● Low Quiescent Current: 60 µA (Typical)
● 5-Pin, SOT-23 Packages 2
APPLICATIONS
● Current Shunt Measurement: – Automotive, Telephone, Computers● Portable and Battery-Backup Systems
● Battery Chargers
● Power Management
● Cell Phones
● Precision Current Source 3
DESCRIPTION
Wide input common-mode voltage range, high-speed, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications. Quiescent current is only 60 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error. 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.
