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    Parts    MAX9634TERS+T
MAX9634TERS+T

ADIMAX9634TERS+T

Analog Devices Inc./Maxim Integrated
Current Sense Amplifier 1 Circuit 4-UCSP (1x1)
Active4,369 in stock
Datasheet Digi-Key Compare Prices

Overview

The MAX9634TERS+T is a high-side current-sense amplifier designed for ultra-low power consumption, drawing only 1.1uA of supply current. It operates over a wide input common-mode range of 1.6V to 28V, making it suitable for monitoring both low-voltage batteries and higher voltage industrial rails. This T-version features a fixed gain of 25V/V in a space-saving 1mm x 1mm UCSP package.

Why Choose This Part

The primary advantage is the industry-leading 1.1uA supply current, which allows for 'always-on' current monitoring with negligible impact on battery life. It also offers excellent precision with a low 100uV input offset voltage and a 0.5% gain accuracy, ensuring reliable measurements across its 125kHz bandwidth.

Applications

Portable Medical Devices
Ideal for battery-powered pulse oximeters and glucose meters where minimizing quiescent current is critical for shelf life.
Energy Harvesting Systems
Monitors micro-power charging currents from solar or thermal sources without significantly loading the energy buffer.
Smartphones and Tablets
Provides precision fuel gauging and charging current monitoring in space-constrained mobile electronics.
Notebook Power Management
Tracks system-level power consumption across 1.6V to 28V rails to optimize battery performance.

Key Specifications

Mounting Type Surface Mount
Amplifier Type Current Sense
Package / Case 4-WFBGA, CSPBGA
Current - Supply 1.1uA
Number of Circuits 1
Operating Temperature -40degC ~ 85degC
Gain Bandwidth Product 125 kHz
Voltage - Input Offset 100 uV
Supplier Device Package 4-UCSP (1x1)

Getting Started

To evaluate this part, use a low-value shunt resistor (e.g., 10mOhm to 100mOhm) based on your maximum expected current and the 25V/V gain. Ensure the 0.5mm pitch UCSP footprint is compatible with your PCB fabrication capabilities, or use the MAX9634EVKIT evaluation board for rapid prototyping.

Also Consider

INA219 TITexas Instruments - Offers a digital I2C interface and 26V common-mode range if an integrated ADC is preferred over an analog output.