SNOSCZ5A June   2015  – June 2015 FDC2112 , FDC2114 , FDC2212 , FDC2214

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description, continued
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Switching Characteristics - I2C
    8. 8.8 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagrams
    3. 9.3 Feature Description
      1. 9.3.1 Clocking Architecture
      2. 9.3.2 Multi-Channel and Single-Channel Operation
        1. 9.3.2.1 Gain and Offset (FDC2112, FDC2114 only)
      3. 9.3.3 Current Drive Control Registers
      4. 9.3.4 Device Status Registers
      5. 9.3.5 Input Deglitch Filter
    4. 9.4 Device Functional Modes
      1. 9.4.1 Start-up Mode
      2. 9.4.2 Normal (Conversion) Mode
      3. 9.4.3 Sleep Mode
      4. 9.4.4 Shutdown Mode
        1. 9.4.4.1 Reset
    5. 9.5 Programming
      1. 9.5.1 I2C Interface Specifications
    6. 9.6 Register Maps
      1. 9.6.1  Register List
      2. 9.6.2  Address 0x00, DATA_CH0
      3. 9.6.3  Address 0x01, DATA_LSB_CH0 (FDC2212 / FDC2214 only)
      4. 9.6.4  Address 0x02, DATA_CH1
      5. 9.6.5  Address 0x03, DATA_LSB_CH1 (FDC2212 / FDC2214 only)
      6. 9.6.6  Address 0x04, DATA_CH2 (FDC2114, FDC2214 only)
      7. 9.6.7  Address 0x05, DATA_LSB_CH2 (FDC2214 only)
      8. 9.6.8  Address 0x06, DATA_CH3 (FDC2114, FDC2214 only)
      9. 9.6.9  Address 0x07, DATA_LSB_CH3 (FDC2214 only)
      10. 9.6.10 Address 0x08, RCOUNT_CH0
      11. 9.6.11 Address 0x09, RCOUNT_CH1
      12. 9.6.12 Address 0x0A, RCOUNT_CH2 (FDC2114, FDC2214 only)
      13. 9.6.13 Address 0x0B, RCOUNT_CH3 (FDC2114, FDC2214 only)
      14. 9.6.14 Address 0x0C, OFFSET_CH0 (FDC21112 / FDC2114 only)
      15. 9.6.15 Address 0x0D, OFFSET_CH1 (FDC21112 / FDC2114 only)
      16. 9.6.16 Address 0x0E, OFFSET_CH2 (FDC2114 only)
      17. 9.6.17 Address 0x0F, OFFSET_CH3 (FDC2114 only)
      18. 9.6.18 Address 0x10, SETTLECOUNT_CH0
      19. 9.6.19 Address 0x11, SETTLECOUNT_CH1
      20. 9.6.20 Address 0x12, SETTLECOUNT_CH2 (FDC2114, FDC2214 only)
      21. 9.6.21 Address 0x13, SETTLECOUNT_CH3 (FDC2114, FDC2214 only)
      22. 9.6.22 Address 0x14, CLOCK_DIVIDERS_CH0
      23. 9.6.23 Address 0x15, CLOCK_DIVIDERS_CH1
      24. 9.6.24 Address 0x16, CLOCK_DIVIDERS_CH2 (FDC2114, FDC2214 only)
      25. 9.6.25 Address 0x17, CLOCK_DIVIDERS_CH3 (FDC2114, FDC2214 only)
      26. 9.6.26 Address 0x18, STATUS
      27. 9.6.27 Address 0x19, ERROR_CONFIG
      28. 9.6.28 Address 0x1A, CONFIG
      29. 9.6.29 Address 0x1B, MUX_CONFIG
      30. 9.6.30 Address 0x1C, RESET_DEV
      31. 9.6.31 Address 0x1E, DRIVE_CURRENT_CH0
      32. 9.6.32 Address 0x1F, DRIVE_CURRENT_CH1
      33. 9.6.33 Address 0x20, DRIVE_CURRENT_CH2 (FDC2114 / FDC2214 only)
      34. 9.6.34 Address 0x21, DRIVE_CURRENT_CH3 (FDC2114 / FDC2214 only)
      35. 9.6.35 Address 0x7E, MANUFACTURER_ID
      36. 9.6.36 Address 0x7F, DEVICE_ID
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Sensor Configuration
      2. 10.1.2 Shield
    2. 10.2 Typical Application
      1. 10.2.1 Schematic
      2. 10.2.2 Design Requirements
      3. 10.2.3 Detailed Design Procedure
        1. 10.2.3.1 Application Performance Plot
        2. 10.2.3.2 Recommended Initial Register Configuration Values
        3. 10.2.3.3 Inductor Self-Resonant Frequency
      4. 10.2.4 Application Curves
      5. 10.2.5 Power-Cycled Applications
    3. 10.3 Do's and Don'ts
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Related Links
    3. 13.3 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • EMI-Resistant Architecture
  • Maximum Output Rates (one active channel):
    • 13.3 ksps (FDC2112, FDC2114)
    • 4.08 ksps (FDC2212, FDC2214)
  • Maximum Input Capacitance: 250 nF (at 10 kHz with 1 mH inductor)
  • Sensor Excitation Frequency: 10 kHz to 10 MHz
  • Number of channels: 2, 4
  • Resolution: up to 28 bits
  • System Noise Floor: 0.3 fF at 100 sps
  • Supply Voltage: 2.7 V to 3.6 V
  • Power Consumption: Active: 2.1 mA
  • Low-Power Sleep Mode: 35 uA
  • Shutdown: 200 nA
  • Interface: I2C
  • Temperature range: -40°C to +125°C

2 Applications

  • Proximity Sensor
  • Gesture Recognition
  • Level Sensor for Liquids, including Conductive ones such as Detergent, Soap, and Ink
  • Collision Avoidance
  • Rain, Fog, Ice, Snow Sensor
  • Automotive Door and Kick Sensors
  • Material Size Detection

3 Description

Capacitive sensing is a low-power, low-cost, high-resolution contactless sensing technique that can be applied to a variety of applications ranging from proximity detection and gesture recognition to remote liquid level sensing. The sensor in a capacitive sensing system is any metal or conductor, allowing for low cost and highly flexible system design.

The main challenge limiting sensitivity in capacitive sensing applications is noise susceptibility of the sensors. With the FDC2x1x innovative EMI resistant architecture, performance can be maintained even in presence of high-noise environments.

The FDC2x1x is a multi-channel family of noise- and EMI-resistant, high-resolution, high-speed capacitance-to-digital converters for implementing capacitive sensing solutions. The devices employ an innovative narrow-band based architecture to offer high rejection of noise and interferers while providing high resolution at high speed. The devices support a wide excitation frequency range, offering flexibility in system design. A wide frequency range is especially useful for reliable sensing of conductive liquids such as detergent, soap, and ink.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
FDC2112, FDC2212 WSON (DNT 12) 4.00 mm x 4.00 mm
FDC2114, FDC2214 WQFN (RGH 16) 4.00 mm x 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic

FDC2212 FDC2214 FDC2112 FDC2114 4_channel_block_snoscz5.gif