Hot-selling and scarce AD7280ABSTZ Lithium Ion Battery Monitoring System LQFP48 spot stock

Product Descriptions

The AD7280A contains all the functions required for generalpurpose monitoring of stacked lithium ion batteries as used in hybrid electric vehicles, battery backup applications, and power tools. The part has multiplexed cell voltage and auxiliary ADC measurement channels for up to six cells of battery management. An internal ±3 ppm/°C reference is provided that allows a cell voltage accuracy of ±1.6 mV. The ADC resolution is 12 bits and allows conversion of up to 48 cells within 7 μs.

The AD7280A operates from a single VDD  supply that has a range of 8 V to 30 V (with an absolute maximum rating of33 V). The part provides six differential analog input channels to accommodate large common-mode signals across the full VDD range. Each channel allows an input signal range, VIN(+)− VIN(−), of 1 V to 5 V. The input pins assume a series stack of six cells. In addition, the part includes six auxiliary ADC input channels that can be used for temperature measurement or system diagnostics.

Product Features

12-bit ADC, 1 μs per channel conversion time

6 analog input channels, common-mode

range 0.5 V to 27.5 V

6 auxiliary ADC inputs

±1.6 mV cell voltage accuracy

On-chip voltage regulator

Cell balancing interface

Daisy-chain interface

Internal reference: ±3 ppm/oC

1.8 μA power-down current

High input impedance

Serial interface with alert function

1 SPI interface for up to 48 channels

CRC protection on read and write commands

On-chip registers for channel sequencing

VDD operating range: 8 V to 30 V

Temperature range: −40°C to +105°C

48-lead LQFP

Qualified for automotive applications 

Product Applications

Lithium ion battery monitoring

Electric and hybrid electric vehicles

Power supply backup

Power tools

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Product Specifications

Product Photos

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