LC717A00AR-NH

Overview

The LC717A00AR-NH is a capacitance-digital-converter LSI designed for electrostatic capacitive touch sensors. It features eight differential input channels capable of detecting femtofarad-level capacitance changes. The device supports both I2C and SPI serial interfaces, allowing flexible integration with external controllers. Operating on a supply voltage range of 2.6 V to 5.5 V, it consumes approximately 320 µA at 2.8 V and 740 µA at 5.5 V in stand-alone mode. The sensor provides 8-bit resolution output data and includes automatic calibration logic to handle environmental variations.

Feature Summary

• Differential mutual capacitance detection system for accurate touch sensing
• Automatic calibration logic that adjusts parameters during power activation or environmental shifts
• Selectable I2C compatible bus or SPI interface for parameter adjustment and data readout
• Integrated logic circuit for direct ON/OFF state detection without complex external processing

Applications

• Electrostatic capacitive touch switch applications
• Consumer electronics requiring low-cost touch interface solutions
• Embedded systems utilizing I2C or SPI communication protocols

Procurement Notes

Verify the specific ordering suffix NH against current manufacturer documentation to confirm package type and shipping configuration. Confirm RoHS compliance status directly from the latest datasheet revision before finalizing procurement specifications.

Selection Notes

Select this component when an 8-channel capacitive touch solution with integrated digital conversion is required. Ensure the application design accommodates the VCT28 package dimensions and operates within the specified -40°C to +105°C temperature range.

Part Context

This part belongs to the LC717A00AR series of capacitance-to-digital converters manufactured by onsemi. It is specifically engineered as a standalone touch sensor controller, eliminating the need for extensive external analog front-end circuitry while providing precise digital output data.

Replacement Considerations

Consult official substitution guides for equivalent parts within the LC717A series. Verify pin compatibility and electrical characteristics against the target application requirements before implementing any alternative components.

FAQ

How does the LC717A00AR handle environmental changes?

The built-in logic circuit automatically performs calibration functions during power activation or whenever environmental changes occur, ensuring consistent detection performance.

What is the maximum operating supply voltage?

The recommended operating conditions specify a maximum supply voltage (VDD) of 5.5 V.

Can the device operate without a microcontroller?

Yes, the LC717A00AR can operate as a standalone device using its internal logic to detect switch states and output results via the Pout pins.