AD7147WPACPZ-1RL

Overview

The AD7147WPACPZ-1RL 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 environmental calibration and adaptive threshold logic to compensate for ambient changes. It operates on a 2.6 V to 3.6 V supply, consuming 1 mA in full power mode and approximately 21.5 μA in low power mode. The component utilizes an SPI-compatible serial interface and is housed in a 24-lead, 4 mm × 4 mm LFCSP package.

Feature Summary

• Integrated 16-bit capacitance-to-digital converter with femtofarad resolution
• 13 capacitance sensor inputs with automatic conversion sequencer
• On-chip automatic calibration logic for environmental compensation
• SPI-compatible serial interface with separate VDRIVE level

Applications

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

Procurement Notes

Verify the specific suffix 'W' against the manufacturer's official ordering guide to confirm automotive qualification status and temperature range specifications. Ensure the source documentation explicitly supports the '-1RL' designation as it may indicate specific packaging or variant details distinct from standard commercial versions.

Selection Notes

Select this component for applications requiring high-resolution capacitive sensing without external RC components. The AD7147 supports both SPI and I2C interfaces via the AD7147-1 variant; ensure the host processor matches the selected interface type. Consider the low power mode options if battery life is a critical constraint for the portable device design.

Part Context

This part belongs to the AD7147 family of CapTouch controllers designed for user input methods like buttons, scroll bars, and wheels. It is compatible with the register map of the AD7142. The device is qualified for automotive applications and includes an active shield output to minimize noise pickup in sensor designs.

Replacement Considerations

The AD7147ACCPZ-RL is a commercial grade alternative within the same series. Verify interface compatibility and operating temperature ranges when substituting.