AD7147PACPZ-RL

Overview

The AD7147PACPZ-RL is a CapTouch programmable controller for single-electrode capacitance sensors, manufactured by Analog Devices Inc. It integrates a 16-bit, 250 kHz sigma-delta capacitance-to-digital converter (CDC) with 13 sensor inputs. The device features on-chip automatic calibration logic to compensate for environmental changes and adaptive threshold levels. It operates on a 2.6 V to 3.6 V supply with full power current of 1 mA and low power mode current of 21.5 μA. Communication is handled via an SPI-compatible serial interface, and it includes an interrupt output and GPIO in a 24-lead LFCSP package.

Feature Summary

• Integrated 16-bit capacitance-to-digital converter with 13 sensor inputs
• On-chip automatic calibration and adaptive threshold logic
• SPI-compatible serial interface with separate VDRIVE level
• Low operating current: 1 mA (full power), 21.5 μA (low power)

Applications

• Cell phones
• Personal music and multimedia players
• Smart handheld devices
• Television, A/V, and remote controls
• Gaming consoles

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm interface type and packaging details. Ensure compatibility with system voltage requirements and serial interface protocols before integration.

Selection Notes

Select this component for applications requiring high-resolution capacitance sensing with minimal external components. Consider the low power mode for battery-operated devices. Verify that the host processor supports the SPI interface or utilizes the provided open-source software libraries for complex sensor functions like scroll bars.

Part Context

This part belongs to the AD7147 series of CapTouch controllers. It is designed to replace mechanical switches with capacitive touch interfaces, enabling ultrathin PCB designs. The device simplifies sensor implementation by handling calibration and threshold detection internally.

Replacement Considerations

Check for pin-compatible alternatives within the AD7147 family, such as the AD7147-1 which offers an I2C interface. Ensure any replacement maintains the required number of sensor inputs and interface compatibility.