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LC717A00AR: Capacitance-Digital-Converter for Electrostatic Capacitive Touch Sensors

Datasheet: Capacitance-Digital-Converter LSI for Electrostatic Capacitive Touch Sensors
Rev. 3 (133kB)
Product Overview
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The LC717A00AR is a high-performance, low-cost capacitance-digital-converter LSI for electrostatic capacitive touch sensor, especially focused on usability. It has 8 channels capacitance-sensor input. The built-in logic circuit can detect the state (ON/OFF) of each input and output the result. This makes it ideal for various switch applications. The calibration function is automatically performed by the built-in logic circuit during power activation or whenever there are environmental changes. In addition, since initial settings of parameters, such as gain, are configured, LC717A00AR can operate as stand-alone when the recommended switch pattern is applied. Also, since LC717A00AR has a serial interface compatible with I2C and SPI bus, parameters can be adjusted using external devices whenever necessary. Moreover, outputs of the 8-input capacitance data can be detected and measured as 8-bit data.
Features   Benefits
  • Detection system: Differential capacitance detection (Mutual capacitance type)
  • High sensitivity performance - even wearing multiple layers of gloves, air gap, or thick materials
  • Input capacitance resolution: Can detect capacitance changes in the femto Farad order
  • Design friendly - can be connected directly to a familiar MCU and execute stand alone operation
  • Measurement interval (8 differential inputs):
    18ms (Typ) (at initial configuration),
    3ms (Typ) (at minimum interval configuration)
  • Automated built-in noise and environmental change compensation function technology
  • External components for measurement: Not required
  • Current consumption: 320 µA (Typ) (VDD = 2.8 V), 740 µA (Typ) (VDD = 5.5 V)
  • Supply voltage: 2.6 V to 5.5 V
  • Detection operations: Switch
  • Interface: I2C compatible bus or SPI selectable.
Applications   End Products
  • White goods
  • Black goods
  • PC peripherals
  • Office Automation
  • Washing machine
  • Refrigerator
  • Cooking appliances
  • TV
  • Printer
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
TS-GEVB Active
Touch Switch Shield Evaluation Board
FutureElectronics (2020-08-19) : 2
Budgetary Price/Unit
Case Outline
LC717A00AR-NH Lifetime
Halide free
LC717A00AR VCT-28 601AE 3 260 Tape and Reel 2000 $1.2398
Market Leadtime (weeks) : Contact Factory
Case Outlines
LC717A00AR: Capacitance-Digital-Converter for Electrostatic Capacitive Touch Sensors
LC717A00AR: Capacitance-Digital-Converter for Electrostatic Capacitive Touch Sensors
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