36V, Input Common-Mode, High-Precision, Low-Power Current-Sense Amplifier

The MAX44284 is a high-side, current-sense amplifier that operates with a 1.7V to 5.5V single supply and is optimized for very low power operation with only 21µA of quiescent current.

The MAX44284 offers precision accuracy specifications of 2µV VOS and gain error of 0.05%. The device features an input common-mode voltage range from -0.1V to +36V. This current-sense amplifier has a voltage output and is offered in four different gain versions.

The MAX44284 is offered in small 6-bump, 0.4mm-pitch WLP (1.3mm x 0.9mm) and 6-pin SOT23 packages and is specified for operation over the -40°C to +125°C automotive temperature range.

Applications

* Base-Stations * DC-DC Current Sensing in Power Management * Medical Pulse Oximeters and Infusion Pumps * Notebook Computers * Portable-/Battery-Powered Systems * Smartphones and Tablets

* Supports Use of Small Current-Sense Resistors to Improve Power-Supply Conversion Efficiency and Measurement Accuracy

* Input Bias Current of 80nA (max)

* Very Low 2µV Input Offset Voltage (MAX44284F/H)

* Extremely Low 50nV/°C Input Offset Tempco Coefficient

* -0.1V to +36V Wide Input Common-Mode Range

* Low 0.05% Gain Error

* Extends Battery Life

* Low Supply Current of 21µA

* 1.7V to 5.5V Single Supply

* Shutdown Input (Independent of VDD)

* Four Fixed Gain Options Simplify Design

* 50V/V – MAX44284F

* 100V/V – MAX44284H

* 200V/V – MAX44284W

* 500V/V – MAX44284E