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MAX14921 - (MAX14920 / MAX14921) High-Accuracy 12-/16-Cell Measurement AFEs

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).

The MAX14920 monitors up to 12 cells, while the MAX14921 monitors up to 16 cells.

Features

  • S High Accuracy.
  • ±0.5mV (max) Cell Voltage.
  • Simultaneous Cell Voltage Sampling.
  • Self-Calibration S Integrated Diagnostics.
  • Open-Wire and Short Fault Detection.
  • Undervoltage/Overvoltage Warning.
  • Thermal Shutdown S High Flexibility.
  • SPI Interface.
  • 12-Cell and 16-Cell Versions.
  • +6V Minimum (3 Cells) Operation.
  • +0.5V to +4.5V Cell Voltage Range.
  • Integrated Cell-Balancing FET Drivers.
  • Integrated 5V LDO.

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Other Datasheets by Maxim Integrated (Analog Devices)

Part Number Description
MAX14920 (MAX14920 / MAX14921) High-Accuracy 12-/16-Cell Measurement AFEs
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Full PDF Text Transcription

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EVALUATION KIT AVAILABLE MAX14920/MAX14921 High-Accuracy 12-/16-Cell Measurement AFEs 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). 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. All cell voltages are level shifted to ground reference with unity gain, simplifying external ADC data conversion. 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.
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