【资料名称】：MAX14920\1 High-Accuracy 12-/16-Cell Measurement AFEs

【资料作者】：MAXIM

【资料日期】：2013\7\29

【资料语言】：中文

【资料格式】：PDF

【资料目录和简介】：

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.
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.