User ManualTable of ContentsPreface5Introduction5Document Layout5Conventions Used in this Guide6Recommended Reading7The Microchip Web Site7Customer Support7Document Revision History7Chapter 1. Quick Start Instructions91.1 Introduction91.2 Description of the MCP3422 Evaluation Board91.3 Getting Started with the PICkit Serial Analyzer10Appendix A. Schematic and Layouts25A.1 Introduction25A.2 Board Schematic26A.3 Board – Top Layer27A.4 Board – Top Metal Layer28A.5 Board – Bottom Layer29Appendix B. Bill Of Materials (BOM)31Worldwide Sales and Service32Size: 474 KBPages: 32Language: EnglishOpen manual
Data SheetTable of Contents1.0 Electrical Characteristics52.0 Typical Performance Curves9FIGURE 2-1: INL vs. Supply Voltage (VDD).9FIGURE 2-2: INL vs. Temperature.9FIGURE 2-3: Offset Error vs. Temperature.9FIGURE 2-4: Output Noise vs. Input Voltage.9FIGURE 2-5: Total Error vs. Input Voltage.9FIGURE 2-6: Gain Error vs. Temperature.9FIGURE 2-7: IDDA vs. Temperature.10FIGURE 2-8: IDDS vs. Temperature.10FIGURE 2-9: IDDB vs. Temperature.10FIGURE 2-10: Oscillator Drift vs. Temperature.10FIGURE 2-11: Frequency Response.103.0 Pin Descriptions11TABLE 3-1: PIN Function Table113.1 Analog Inputs (CHn+, CHn-)113.2 Supply Voltage (VDD, VSS)11FIGURE 3-1: Equivalent Analog Input Circuit.123.3 Serial Clock Pin (SCL)123.4 Serial Data Pin (SDA)123.5 Exposed Thermal Pad (EP)124.0 Description of Device Operation134.1 General Overview134.2 Power-On-Reset (POR)13FIGURE 4-1: POR Operation.134.3 Internal Voltage Reference134.4 Analog Input Channels134.5 Input Voltage Range144.6 Input Impedance144.7 Aliasing and Anti-aliasing Filter144.8 Self-Calibration144.9 Digital Output Codes and Conversion to Real Values15TABLE 4-1: Resolution Settings VS. LSB15TABLE 4-2: Example of output code for 18 bits (Note 1, Note 2)15TABLE 4-3: Minimum and Maximum Output codes (Note)15TABLE 4-4: Example of converting output code to voltage (With 18 Bit Setting)165.0 Using the Devices175.1 Operating Modes175.2 Configuration Register18TABLE 5-1: Write Configuration Bits19TABLE 5-2: READ Configuration Bits195.3 I2C Serial Communications19FIGURE 5-1: Address Byte.20FIGURE 5-2: General Call Latch Command and Voltage Output at Address Pin Left “Floating” (MCP3423 and MCP3424).20FIGURE 5-3: Timing Diagram For Writing To The MCP3422/3/4.21TABLE 5-3: Output Codes of each Resolution OPTION22FIGURE 5-4: Timing Diagram For Reading From The MCP3422/3/4 With 18-Bit Mode.23FIGURE 5-5: Timing Diagram For Reading From The MCP3422/3/4 With 12-Bit to 16-Bit Modes.245.4 General Call25FIGURE 5-6: General Call Address Format.255.5 High-Speed (HS) Mode255.6 I2C Bus Characteristics25FIGURE 5-7: Data Transfer Sequence on I2C Serial Bus.26TABLE 5-4: I2c serial timing Specifications (Continued)27FIGURE 5-8: I2C Bus Timing Data.296.0 Basic Application Configuration316.1 Connecting to the Application Circuits31FIGURE 6-1: Typical Connection.31FIGURE 6-2: Example of Multiple Device Connection on I2C Bus.31FIGURE 6-3: I2C Bus Connection Test.32FIGURE 6-4: Differential and Single- Ended Input Connections.326.2 Application Examples33FIGURE 6-5: Battery Voltage and Charging/Discharging Current Measurement.33FIGURE 6-6: Four-Channel Thermocouple Applications.34FIGURE 6-7: Example of Pressure and Temperature Measurement.357.0 Development Tool Support377.1 MCP3422/3/4 Evaluation Boards37FIGURE 7-1: MCP3424 Evaluation Board.37FIGURE 7-2: Setup for the MCP3424 Evaluation Board with PICkit™ Serial Analyzer.37FIGURE 7-3: Example of PICkit™ Serial User Interface.378.0 Packaging Information398.1 Package Marking Information39Size: 1.05 MBPages: 58Language: EnglishOpen manual
