MAX14920/21 AFEs
Analog Devices' MAX14920/21 devices have a low-noise and offset amplifier that buffers differential voltages up to 5 V
Analog Devices' 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/65 V (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 5 V, allowing monitoring of all common lithium-ion (Li+) cell technologies. The resulting cell voltage error is ±0.5 mV. The devices’ high accuracy make them ideal for monitoring cell chemistries with very flat discharge curves, such as lithium-metal phosphate. External FET drivers support passive-cell balancing.
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 (10 mm x 10 mm) TQFP package with an exposed pad. The MAX14921 is available in an 80-pin (12 mm x 12 mm) TQFP package. Both devices are specified over the -40°C to 85°C extended temperature range.
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MAX14920/21 AFEs
图片 | 制造商零件编号 | 描述 | 可供货数量 | 价格 | ||
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MAX14920ECB+ | IC BATT MON MULTI 1-12C 64TQFP | 515 - 立即发货 2400 - 厂方库存 | $125.76 | 查看详情 | ||
MAX14921ECS+ | IC BATT MON MULTI 1-16C 80TQFP | 2023 - 立即发货 65331 - 厂方库存 | $149.04 | 查看详情 |