EVAL-ADM1191EBZ: 电流检测放大器

The ADM1191 is an integrated current sense amplifier that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I²C interface.

An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC pin and the SENSE pin.

A 12-bit ADC can measure the current seen in the sense resistor, as well as the supply voltage on the VCC pin.

An industry-standard I²C interface allows a controller to read current and voltage data from the ADC. Measurements can be initiated by an I²C command or via the convert (CONV) pin. The CONV pin is especially useful for synchronizing reads on multiple ADM1191 devices. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to 16 unique I²C addresses can be created, depending on the way the A0 pin and the A1 pin are connected.

A SETV pin is also included. A voltage applied to this pin is internally compared to the output voltage on the current sense amplifier. The output of the SETV comparator asserts when the current sense amplifier ouput exceeds the SETV voltage. When this event occurs, the ALERTB output asserts.

The ALERTB output can be used as a flag to warn a micro-controller or field programmable gate array (FPGA) of an overcurrent condition. ALERTB outputs of multiple ADM1191 devices can be tied together and used as a combined alert.

The ADM1191 is packaged in a 10-lead MSOP.

EVAL-ADM1191EBZ 应用
EVAL-ADM1191EBZ 特点
EVAL-ADM1191EBZ 功能框图

ADM1191 功能框图

芯片引脚定义图

EVAL-ADM1191EBZ 技术指标
Voltage/Current Readback X Reference Adjust X
ALERT/ALERTB ALERTB Number of I²C Addresses 16
ADM1191 订购指南
产品型号 产品状态 封装 引脚 温度范围
ADM1191-2ARMZ-R7 量产 10 ld MSOP 10 工业
EVAL-ADM1191EBZ 量产 评估板   待定
EVAL-ADM1191EBZ 应用技术支持与电子电路设计开发资源下载
  1. 电流检测放大器系列ADM1191 数据手册DataSheet 下载 . pdf
  2. ADI 模拟器件公司比较器产品选型指南 . pdf
  3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf