LC717A00AR: Capacitance-Digital-Converter for Electrostatic Capacitive Touch Sensors
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- Detection system: Differential capacitance detection (Mutual capacitance type)
- Input capacitance resolution: Can detect capacitance changes in the femto Farad order
- Measurement interval (8 differential inputs): 18ms (Typ) (at initial configuration),3ms (Typ) (at minimum interval configuration)
- 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.
| Benefits- High sensitivity performance - even wearing multiple layers of gloves, air gap, or thick materials
- Design friendly - can be connected directly to a familiar MCU and execute stand alone operation
- Automated built-in noise and environmental change compensation function technology
|
Applications- White goods
- Black goods
- PC peripherals
- Office Automation
| End Products- Washing machine
- Refrigerator
- Cooking appliances
- TV
- Printer
|
Software (4)
Package Drawings (1)
| Document Title | Document ID/Size | Revision |
|---|
| VCT28 3.5x3.5 | 601AE (59.8kB) | A |
Tutorials (1)
Application Notes (2)
Evaluation Board Documents (8)
Data Sheets (1)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| LC717A00ARGEVK | Active | Pb-free | Capacitance Touch Sensor Operation Evaluation Boards |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| LC717A00AR-NH | Active | Pb-free
Halide free | VCT-28 | 601AE | 3 | Tape and Reel | 2000 | $1.1437 |
Specifications
| Product | Number of Sensing Inputs | Number of Sensing Outputs | Interface Control | Proximity Sensing | VDD Min (V) | VDD Max (V) | IDD Typ (µA) |
|---|
| LC717A00AR-NH | 8 | 8 | I2C
SPI | Yes | 2.6 | 5.5 | 740
320 |
