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Analog Devices Inc. 具有 PMBus 接口的亚德诺半导体 ADM1293/ADM1294 数字电源监控器

亚德诺半导体 ADM1293/ADM1294 是高精度集成式数字电源监控器，采用片上 12 位模数转换器(ADC)进行数字电流、电压和电源数字监控，并通过 PMBus™ 兼容型 I²C 接口通信。ADM1293/ADM1294 数字电源监控器通过测量外部检测电阻上的电压差来获取电流读数。ADM1293/ADM1294 采用一个内部 12 位模数转换器对该电压进行放大和数字化处理。此外，同一个模数转换器还可采样初级输入电压和辅助输入电压。ADM1293/ADM1294 的内部数字模块可将电流与初级输入电压相乘，以便计算功率。这些器件还提供功率累加器，实现电能计量功能。业界标准 PMBus 接口允许主控制器读取器件中的数据。主控制器可将此信息与已知的检测电阻值结合，计算一段时间内监控电轨上的电流、电压、功率和能耗值。ADM1293 数字电源监控器用于高侧电源监控，其电压监控范围为 0V 至 20V。ADM1294 数字电源监控器用于低侧电源监控。

特性

  • Monitor current and two voltages
  • High accuracy current monitoring at low sense voltage 0.33% accurate at ±20mV sense voltage over temperature
  • Common-mode sense voltage from 0V to 20V (ADM1293)
  • Support high-side and low-side current sensing
  • Integrated shunt regulator for wide supply input (ADM1294)
  • Reports current, voltage, and power
  • Power accumulation for energy metering
  • Bidirectional current sensing
  • Digitally programmable overcurrent alert
  • Multifunctional pins with user-configurable functions
  • ADC conversion enable input
  • Multisource alert output
  • User-controllable GPO
  • Peak detect registers for current, voltage, and power
  • PMBus fast mode compliant interface
  • Separate SDA I/O for easy isolated communication
  • Two address pins for 16 unique I2C addresses
  • Available in 4mm × 4mm, 16-lead LFCSP, and 14-lead TSSOP
  • -40°C to +105°C operating temperature range

应用

  • Power monitoring/power budgeting
  • Central office equipment
  • Telecommunications and data communications equipment
  • PCs/servers
发布日期: 2015-05-07 | 更新日期: 2023-06-21