Want to post a buying lead? If you are not a member yet, please select the specific/related part number first and then fill the quantity and your contact details in the "Request for Quotation Form" on the left, and then click "Send RFQ".Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon.
The INA138 and INA168 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, 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 2.7V to 36V for the INA138 and 2.7V to 60V for the INA168. Both models draw only 25mA quiescent current, which also 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 SOT23-5 and are specified for the 40 to +85 industrial temperature range.
INA138 Maximum Ratings
Supply Voltage, V+ INA138 ............................................................................... 0.3V to 60V INA168 ............................................................................... 0.3V to 60V Analog Inputs, VIN+ , VININA138 Common Mode ................................................................... 0.3V to 40V Differential (VIN+ ) (VIN ) ............................................... 40V to 2V INA168 Common Mode ................................................................... 0.3V to 60V Differential (VIN+ ) (VIN) ............................................... 40V to 2V Analog Output, Out ............................................................ 0.3V to 40V Operating Temperature ..................................................55 to +125 Storage Temperature .................................................... 55 to +125 Junction Temperature ................................................................... +150 Lead Temperature (soldering, 10s) .............................................. +300
NOTE: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied.
INA138 Features
`COMPLETE UNIPOLAR HIGH-SIDE CURRENT MEASUREMENT CIRCUIT `WIDE SUPPLY AND COMMON-MODE RANGE `INA138: 2.7V to 36V `INA168: 2.7V to 60V `INDEPENDENT SUPPLY AND INPUT COMMON-MODE VOLTAGES `SINGLE RESISTOR GAIN SET `LOW QUIESCENT CURRENT (25A typ) `SOT23-5 Package
INA138 Typical Application
·CURRENT SHUNT MEASUREMENT Automotive, Telephone, Computers ·PORTABLE & BATTERY BACKUP SYSTEMS ·BATTERY CHARGERS ·POWER MANAGEMENT ·CELL PHONES ·PRECISION CURRENT SOURCE