MAX14920 Datasheet PDF | Maxim Integrated

Maxim Integrated MAX14920

The MAX14920 monitors up to 12 cells, while the MAX14921 monitors up to 16 cells. Both devices simultaneously sample all cell voltages, allowing accurate state-of-charge and source-resistance determination. The devices have a low-noise, low-offset amplifier that buffers differential voltages of up to +5V, allowing monitoring of all common lithium-ion (Li+) cell technologies.

Part No.	MAX14920
Datasheet	MAX14920 Download
Manufacturer	Maxim Integrated
Description	High-Accuracy 12-/16-Cell Measurement AFEs
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GENERAL DESCRIPTION

The MAX14920/MAX14921 battery measurement analog front-end devices accurately sample cell voltages and provide level shifting for primary/secondary battery packs up to 16 cells/+65V (max). All cell voltages are level shifted to ground reference with unity gain, simplifying external ADC data conversion. The resulting cell voltage error is Q0.5mV. The devices’ high accuracy make them ideal for monitoring cell chemistries with very flat discharge curves, such as lithium-metal phosphate. Passive-cell balancing is supported by external FET drivers. Integrated diagnostics in the devices allow open-wire detection and undervoltage/overvoltage alarms. The devices are controlled by a daisy-chainable SPI interface. The MAX14920 is available in a 64-pin (10mm x 10mm) TQFP package with an exposed pad. The MAX14921 is available in an 80-pin (12mm x 12mm) TQFP package. Both devices are specified over the -40°C to +85°C extended temperature range. Benefits and

FEATURES

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