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General Description

The MAX9934** high-precision, low-voltage, high-side current-sense amplifier is ideal for both bidirectional (charge/discharge) and unidirectional current measure ments in battery-powered portable and laptop devices. Input offset voltage (VOS) is a low 10μV (max) at +25°C across the -0.1V to 5.5V input common-mode voltage range, and is independent of VCC. Its precision input specification allows the use of very small sense voltages (typically ±10mV full-scale) for minimally invasive current sensing.

Features

? Input Offset Voltage: 10μV (max)

? Gain Error Less than 0.25

? -0.1V to +5.5V Input Common-Mode Voltage Range

? Chip Select Allows Multiplexing Several MAX9934 Current Monitors to One ADC

? Current Output Allows ROUT Selection for Gain Flexibility

? Single Supply Operation: 2.5V to 3.6V

? Two Gain Options: GM of 25μA/mV (MAX9934T) and 5μA/mV (MAX9934F)

? Bidirectional or Unidirectional Operation

? Small, 6-Bump UCSP (1mm x 1.5mm x 0.6mm), 6-Pin μDFN (2mm x 2mm x 0.6mm), and 8-Pin μMAX Packages

Applications

? PDAs and Smartphones

? MP3 Players

? Sensor Instrumentation Amplifiers

? Notebook PCs and Ultra-Mobile PCs

? Portable Current Monitoring

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