The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.
The INA250 family is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A. This device is fully tested and specified for continuous currents up to 10 amps at the maximum temperature of 125°C. The INA250 operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250 gain versions are specified over the extended operating temperature range (–40°C to 125°C), and are available in a TSSOP-16 package.
PART NUMBER | PACKAGE(1) | PACKAGE SIZE(2) |
---|---|---|
INA250A1 | PW (TSSOP, 16) | 5.00 mm × 6.40 mm |
INA250A2 | ||
INA250A3 | ||
INA250A4 |
Changes from Revision B (December 2015) to Revision C (September 2023)
Changes from Revision A (May 2015) to Revision B (December 2015)
Changes from Revision * (April 2015) to Revision A (May 2015)
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
GND | 6, 8, 11 | Analog | Ground |
IN– | 1, 2, 3 | Analog input | Connect to load |
IN+ | 14, 15, 16 | Analog input | Connect to supply |
OUT | 9 | Analog output | Output voltage |
REF | 7 | Analog input | Reference voltage, 0 V to VS (up to 18 V) |
SH– | 4 | Analog output | Kelvin connection to internal shunt. Connect to
VIN– if no filtering is needed. See Figure 7-4 for filter recommendations. |
SH+ | 13 | Analog output | Kelvin connection to internal shunt. Connect to
VIN+ if no filtering is needed. See Figure 7-4 for filter recommendations. |
VIN– | 5 | Analog input | Voltage input from load side of shunt resistor. |
VIN+ | 12 | Analog input | Voltage input from supply side of shunt resistor. |
VS | 10 | Analog | Device power supply, 2.7 V to 36 V |