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Analog Devices Inc. Multi-Cell Battery Monitor | New Product Brief

January 27, 2020 by Mouser Electronics

This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.

Analog Devices Inc. Multi-Cell Battery Monitor

Analog Devices’ LTC6813 18-channel multi-cell battery monitor provides fast and accurate measurement of multiple battery cells in automotive, industrial, and high-power portable equipment. The device can measure up to 18 battery cells in series, permitting individual cell monitoring of high-voltage battery strings with passive balancing for each cell.

The LTC6813 has a 0 to 5-volt measurement range for compatibility with most battery chemistries, and has a total measurement error of fewer than 2.2 millivolts. It can measure all cells in 290 microseconds, with the flexibility to use lower data acquisition rates to reduce measurement noise.

The IC has an isoSPI interface that supports daisy-chaining multiple devices and provides high-speed operation and RF noise immunity.

The LTC6813 can be powered from the monitored battery or from an isolated supply, and has a low-power sleep mode that drops supply current to 6 microamps.

  • Measures up to 18 battery cells in series
    • Passive cell balancing up to 200mA
  • Measurement range: 0V to 5V
    • Total error less than 2.2mV
  • 290µs to Measure All Cells in a System
    • Use lower acquisition rates to reduce noise
  • Built-In isoSPI™ Interface provides high-speed communication with RF noise immunity
    • Can daisy-chain multiple ICs
  • Power directly from the battery or isolated supply
    • 6µA sleep mode supply current

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