User ManualTable of ContentsPreface5Introduction5Document Layout5Conventions Used in this Guide6Recommended Reading7The Microchip Web Site7Customer Support7Document Revision History8Chapter 1. Quick Start Instructions91.1 Introduction91.2 Description of the MCP3425 SOT23-6 Evaluation Board91.3 Getting Started with PICkit™ Serial Analyzer11Appendix A. Schematic and Layouts27A.1 Introduction27A.2 Board – Schematic28A.3 Board – Top Layer29A.4 Board – Top MetAl Layer30A.5 Board – BoTtom Layer31Appendix B. Bill Of Materials (BOM)33Worldwide Sales and Service34Size: 680 KBPages: 34Language: EnglishOpen manual
Data SheetTable of Contents1.0 Electrical Characteristics31.1 Absolute Maximum Ratings†32.0 Typical Performance Curves5FIGURE 2-1: INL vs. Supply Voltage (VDD).5FIGURE 2-2: INL vs. Temperature.5FIGURE 2-3: Offset Error vs. Temperature.5FIGURE 2-4: Output Noise vs. Input Voltage.5FIGURE 2-5: Total Error vs. Input Voltage.5FIGURE 2-6: Gain Error vs. Temperature.5FIGURE 2-7: IDDA vs. Temperature.6FIGURE 2-8: IDDS vs. Temperature.6FIGURE 2-9: IDDB vs. Temperature.6FIGURE 2-10: OSC Drift vs. Temperature.6FIGURE 2-11: Frequency Response.63.0 Pin Descriptions7TABLE 3-1: PIN Function Table73.1 Analog Inputs (VIN+, VIN-)73.2 Supply Voltage (VDD, VSS)73.3 Serial Clock Pin (SCL)73.4 Serial Data Pin (SDA)74.0 Description of Device Operation94.1 General Overview94.2 Power-On-Reset (POR)9FIGURE 4-1: POR Operation.94.3 Internal Voltage Reference94.4 Analog Input Channel94.5 Input Voltage Range104.6 Input Impedance104.7 Aliasing and Anti-aliasing Filter104.8 Self-Calibration104.9 Digital Output Codes and Conversion to Real Values11TABLE 4-1: Resolution Settings VS. LSB11TABLE 4-2: Example of output code for 16 bits11TABLE 4-3: Minimum and Maximum codes11TABLE 4-4: Example of converting output code to voltage (With 16 Bit Setting)125.0 Using the MCP3425 Device135.1 Operating Modes135.2 Configuration Register14TABLE 5-1: Write Configuration Bits15TABLE 5-2: READ Configuration Bits155.3 I2C Serial Communications15FIGURE 5-1: MCP3425 Address Byte.16FIGURE 5-2: Timing Diagram For Writing To The MCP3425.16TABLE 5-3: Output Codes of each Resolution OPTION17FIGURE 5-3: iming Diagram For Reading From The MCP3425.185.4 General Call19FIGURE 5-4: General Call Address Format.195.5 High-Speed (HS) Mode195.6 I2C Bus Characteristics19FIGURE 5-5: Data Transfer Sequence on I2C Serial Bus.20TABLE 5-4: I2c serial timing Specifications21FIGURE 5-6: I2C Bus Timing Data.236.0 Basic Application Configurations and Examples256.1 Connecting to the Application Circuits25FIGURE 6-1: Typical Connection Example.25FIGURE 6-2: Example of Multiple Device Connection on I2C Bus.25FIGURE 6-3: I2C Bus Communications Test.26FIGURE 6-4: Differential and Single- Ended Input Connections.266.2 Application Examples27FIGURE 6-5: Battery Voltage Measurement.27FIGURE 6-6: Battery Current Measurement.27FIGURE 6-7: Example of Pressure Measurement.28FIGURE 6-8: Simple Signal Conditioning Design with Asymmetric Circuit.28FIGURE 6-9: High Performance Signal Conditioning Design with Symmetric Circuit.28FIGURE 6-10: Example of Temperature Measurement.287.0 Development TOOL Support297.1 MCP3425 Evaluation Boards29FIGURE 7-1: MCP3425 Evaluation Board.29FIGURE 7-2: Setup for the MCP3425 Evaluation Board with PICkit™ Serial Analyzer.298.0 Packaging Information318.1 Package Marking Information31Size: 698 KBPages: 38Language: EnglishOpen manual
