AD7284
: 不推荐用于新设计
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AD7284

8-Channel, Li-Ion, Battery Monitoring System

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: 不推荐用于新设计 tooltip
: 不推荐用于新设计 tooltip
产品详情
特性
  • 8 analog input channels, integrated secondary monitor
    • ±3 mV maximum cell voltage accuracy, TUE, 14-bit ADC
  • Very low measurement latency across 96 cells
  • Stack voltage measurement
    • ±16 mV typical battery stack voltage (TUE) accuracy
  • Cell balancing interface, with individually programmable on time
  • 4 auxiliary analog input channels, 14-bit ADC
    • Suitable for thermistor inputs and external diagnostics
    • Buffered reference output for ratiometric measurements
  • Internal temperature sensor
  • VDD operating range: 10 V to 40 V
  • On-chip 5 V regulator
  • Watchdog timer
  • IDD matching current: 100 μA
  • Robust, proprietary daisy-chain interface
  • SPI to host controller
  • CRC protection on read and write commands
  • 2 general-purpose outputs
  • 64-lead low profile quad flat package, exposed pad (LQFP_EP)
  • Junction temperature range: −30°C to +120°C
  • Qualified for automotive applications
更多细节
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The AD7284 contains all the functions required for the general-purpose monitoring of stacked Li-Ion batteries, as used in hybrid electric vehicles and battery backup applications.

The AD7284 has multiplexed cell voltage and auxiliary, analog-to-digital converter (ADC) measurement channels supporting four to eight cells of battery management. The device provides a maximum total unadjusted error, TUE, (cell voltage accuracy) of ±3 mV that includes all the internal errors from input to output. The primary ADC resolution is 14 bits.

The AD7284 also includes an integrated secondary measurement path that validates the data on the primary ADC. Other diagnostic features include the detection of open inputs, communication, and power supply related faults.

The AD7284 cell balancing interface outputs control the external field effect transistors (FETs) to allow discharging of individual cells.

There are two on-chip 2.5 V voltage references: one reference for the primary measurement path, and one for the secondary measurement path.

The AD7284 operates from one VDD supply, ranging from 10 V to 40 V. The device provides eight differential analog input channels to accommodate large common-mode signals across the full VDD range. Each channel allows an input signal range, VPINx − VPIN(x − 1) and VSINx – VSIN(x − 1), of 0 V to 5 V, where x = 0 to 8. The input pins assume a series stack of eight cells. The AD7284 includes four auxiliary ADC input channels that can be used for temperature measurement or system diagnostics.

The AD7284 has a differential daisy-chain interface that allows multiple devices to be stacked without the need for individual device isolation. By design, this interface allows both device to device communication within the same module and communication between devices on different modules.

Applications

  • Li-Ion battery monitoring
  • Electric and hybrid electric vehicles
  • Stationary power applications

产品技术资料帮助

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ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许,也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。

参考资料

参考资料

产品型号 引脚/封装图-中文版 文档 CAD 符号,脚注和 3D模型
AD7284WBSWZ
  • HTML
  • HTML
AD7284WBSWZ-RL
  • HTML
  • HTML
软件和型号相关生态系统

软件和型号相关生态系统

评估套件

评估套件 1

reference details image

EVAL-AD7284

AD7284 评估板

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EVAL-AD7284

AD7284 评估板

AD7284 评估板

特性和优点

  • AD7284的全功能评估板
  • 单独的主从评估套件
  • 直流菊花链或隔离式菊花链选项
  • 主配置套件
    • 兼容EVAL-SDP-CB1Z
    • 独立工作能力
    • 隔离电源和接口
  • 从配置套件
    • 可以与AD7284主配置套件一同使用
    • 直接与AD7284主板接口
    • 菊花链功能,最多可以连接20个器件
  • 与ADI公司的系统演示平台(SDP) EVAL-SDP-CB1Z配合使用时,PC软件用于控制和数据分析

产品详情

AD7284是一款完整的14位分辨率、锂离子电池监控系统,集成了多个电压和辅助模数转换器(ADC)输入通道。有关器件的完整详情可参考ADI公司的AD7284数据手册,使用评估套件时应同时参阅数据手册和本用户指南。


主板上的板载元件包括使用ADuM1201和ADuM5401数字隔离器的隔离电源和接口以及使用ADP3303和ADP7104稳压器的电源。


AD7284主板与ADI公司的EVAL-SDP-CB1Z SDP板配合使用,SDP板可与评估板分开购买。

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