The INA229-Q1 is an ultra-precise digital power
monitor with 20-bit delta-sigma ADC specifically
designed for current-sensing applications. The device
can measure a full-scale differential input of ±163.84
mV or ±40.96 mV across a resistive shunt sense
element with common-mode voltage support from
–0.3 V to +85 V.
The low offset and gain drift design of the INA229-Q1
allows it to be used in precise systems that do not
undergo multi-temperature calibration during
manufacturing. Further, the very low offset voltage
and noise allow for use in mA to kA sensing
applications and provide a wide dynamic range
without significant power dissipation losses on the
sensing shunt element. The low input bias current of
the device permits the use of larger current-sense
resistors, thus providing accurate current
measurements in the microamp range.
The device allows for selectable ADC conversion
times from 50 μs to 4.12 ms as well as sample
averaging from 1x to 1024x which further helps
reduce the noise of the measured data.
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