AD7877ACP-REEL7

$2.78

Description：IC ADC 12BIT TOUCHSCREEN 32LFCSP
Series：-

SKU:53614582820b Category: Touch Screen Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC ADC 12BIT TOUCHSCREEN 32LFCSP
Series：-
Mfr：Analog Devices Inc.
Package：Bulk
Touchscreen：-
Resolution (Bits)：12 b
Interface：-
Voltage Reference：External, Internal
Voltage - Supply：2.7V ~ 5.25V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：32-VFQFN Exposed Pad, CSP
Supplier Device Package：32-LFCSP-VQ (5x5)
Current - Supply：1 µA
Grade：-
Qualification：-

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AD7877ACP-REEL7

Overview

The AD7877 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 with a throughput rate of 125 kSPS. The device integrates an on-chip 2.5 V reference, an 8-bit DAC, and an internal temperature sensor. It supports four-wire touch screens via low on-resistance switches and includes two battery measurement channels, three auxiliary inputs, and four GPIOs. The part features a synchronous serial interface and is available in a 32-lead LFCSP package.

Feature Summary

12-bit resolution with 125 kSPS throughput rate
Integrated 2.5 V reference, 8-bit DAC, and temperature sensor
Four-wire touch screen interface with LCD noise reduction (STOPACQ)
Two direct battery measurement channels and three auxiliary analog inputs

Applications

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

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm package type and automotive qualification status. Confirm that the REEL7 designation corresponds to the intended tape and reel packaging configuration for production integration.

Selection Notes

Select this component for systems requiring integrated touch digitization and auxiliary monitoring. Ensure the host system provides a compatible SPI serial clock within the 20 MHz maximum limit. Verify that the power supply voltage remains within the 2.7 V to 5.25 V range for specified performance.

Part Context

The AD7877 belongs to Analog Devices' family of touch screen controllers. It is functionally similar to the AD7843 but offers additional integrated features such as the on-chip DAC and temperature sensor. The device is suitable for portable applications due to its shutdown mode which reduces current consumption to less than 1 µA.