Description:
The 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 use in a variety of applications. 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. Quiescent current is only 60 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.
Application:
Current Shunt Measurement: – Automotive, Telephone, Computers
Portable and Battery-Backup Systems
Battery Chargers
Power Management
Cell Phones
Precision Current Source
Features:
Complete Unipolar High-Side Current
Measurement Circuit
Wide Supply and Common-Mode Range: 2.7 V to 40 V
Independent Supply and Input Common-Mode Voltages
Single Resistor Gain Set
Low Quiescent Current: 60 µA (Typical)
5-Pin, SOT-23 Packages
Pinout:
1. OUT: Output current
2. GND: Ground
3. VIN+: Positive input voltage
4. VIN-: Negative input voltage
5. V+: Power Supply