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MAX44284：36V, Input Common-Mode, High-Precision, Low-Power Current-Sense Amplifier

Measure Four Decades of Dynamic Range without Increasing Measurement Errors

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.

Key Features 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

MAX44284: Typical Application Circuit Applications/Uses Base-Stations DC-DC Current Sensing in Power Management Medical Pulse Oximeters and Infusion Pumps Notebook Computers Portable-/Battery-Powered Systems Smartphones and Tablets

DataSheet

Parametrics

Design kits & evaluation modules

• MAX44284EVKIT

Quality and Environmental Data

• MAX44284.pdf

Ordering Information