AD7877ACPZ-500RL7

Overview

The AD7877ACPZ-500RL7 is a 12-bit successive approximation analog-to-digital converter (ADC) designed for resistive touch screen digitization. It operates from a single 2.7 V to 5.25 V supply and achieves throughput rates of 125 kSPS. The device integrates an on-chip 2.5 V reference, an 8-bit DAC, temperature sensor, and two battery measurement channels. It features a synchronous serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. The component is housed in a 32-lead LFCSP package measuring 5 mm × 5 mm.

Feature Summary

• Integrated 4-wire touch screen interface with low on-resistance switches
• On-chip 2.5 V reference, 8-bit DAC, and temperature sensor
• Two direct battery measurement channels (0.5 V to 5 V)
• Three auxiliary analog inputs and four GPIOs
• LCD noise reduction via STOPACQ pin control

Applications

• Personal digital assistants
• Smart hand-held devices
• Touch screen monitors
• Point-of-sale terminals
• Medical devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current data sheet to confirm package type and automotive qualification status. Ensure that the voltage levels on the VDRIVE pin are compatible with the host system's logic requirements before integration.

Selection Notes

Select this component when a high-resolution 12-bit ADC with integrated touch screen driving capabilities is required. Consider the internal 2.5 V reference if external precision references are not available. Verify that the 32-lead LFCSP package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the AD7877 series of touch screen controllers manufactured by Analog Devices Inc. The series includes variants such as the AD7877WACPZ-REEL7 and AD7877ACPZ-500RL7, which share core functional specifications but may differ in packaging or reel quantities.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.