ZHCA962 October   2019

 

  1.    说明
  2.    资源
  3.    特性
  4.    应用
  5.    设计图像
  6. 1System Description
    1. 1.1 Key System Specifications
    2. 1.2 Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Input Power
        1. 2.2.1.1 Vpwr
        2. 2.2.1.2 3.3 V
        3. 2.2.1.3 3.3 V_ISO
      2. 2.2.2 Communication Interface
        1. 2.2.2.1 PSE I2C Communication
        2. 2.2.2.2 MCU - Host Communication
      3. 2.2.3 MSP430F523x Hardware Design
    3. 2.3 Highlighted Products
      1. 2.3.1  TPS23882
      2. 2.3.2  MSP430F523x
      3. 2.3.3  ISO7741
      4. 2.3.4  ISO7731
      5. 2.3.5  CSD19538
      6. 2.3.6  LM5017
      7. 2.3.7  LM5020
      8. 2.3.8  LM5050
      9. 2.3.9  INA240
      10. 2.3.10 REF3425
      11. 2.3.11 TPS3890
  8. 3Hardware, Software, Testing Requirement and Test Result
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Software
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
        1. 3.2.1.1 Hardware Setup
        2. 3.2.1.2 LED, Test Point, Jumper and Connector Settings
          1. 3.2.1.2.1 EVM LEDs
          2. 3.2.1.2.2 EVM Test Points
          3. 3.2.1.2.3 EVM Jumpers
          4. 3.2.1.2.4 EVM Input and Output Connectors
        3. 3.2.1.3 System Firmware GUI Setup
          1. 3.2.1.3.1 PSE System Firmware GUI Installation
          2. 3.2.1.3.2 PSE System Firmware GUI Operation
      2. 3.2.2 Test Results
  9. 4Design Files
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 商标

2.3.10 REF3425

The REF3425 device is used to provide a threshold to output the INA240 and generate a signal to MCU for overcurrent alert.

The REF34xx device is a low temperature drift (6 ppm/°C), low-power, high-precision CMOS voltage reference, featuring ±0.05% initial accuracy, low operating current with power consumption less than 95 μA. This device also offers very low output noise of 3.8 μVp-p /V, which enables its ability to maintain high signal integrity with high-resolution data converters in noise critical systems. With a small SOT-23 package, the REF34xx offers enhanced specifications and pin-to-pin replacement for MAX607x and ADR34xx. The REF34xx family is compatible to most of the ADC and DAC such as the ADS1287, ADUCM360, and ADS1112 devices. Stability and system reliability are further improved by the low output-voltage hysteresis of the device and low long-term output voltage drift. Furthermore, the small size and low operating current of the devices (95 μA) can benefit portable and battery-powered applications.