AD7873ARQ

$2.40

Description：IC ADC 12BIT TOUCHSCREEN 16-QSOP
Series：-

SKU:cd8edc3f662a Category: Touch Screen Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC ADC 12BIT TOUCHSCREEN 16-QSOP
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Touchscreen：-
Resolution (Bits)：12 b
Interface：Serial
Voltage Reference：External, Internal
Voltage - Supply：2.2V ~ 5.25V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：16-SSOP (0.154", 3.90mm Width)
Supplier Device Package：16-QSOP
Current - Supply：-
Grade：-
Qualification：-

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AD7873ARQ

Overview

The AD7873ARQ is a 12-bit successive approximation analog-to-digital converter (ADC) designed for touch screen digitizer applications. It operates from a single 2.2 V to 5.25 V supply and supports throughput rates up to 125 kSPS. The device integrates low on-resistance switches for driving resistive touch screens, an internal 2.5 V reference, and an on-chip temperature sensor. Key specifications include a programmable resolution of 8 or 12 bits, a synchronous serial interface, and a shutdown mode with current consumption below 1 µA.

Feature Summary

Integrated 4-wire touch screen interface with low on-resistance switches
On-chip 2.5 V reference and temperature sensor (-40°C to +85°C)
Direct battery measurement capability (0 V to 6 V input range)
Programmable 8-bit or 12-bit resolution with 125 kSPS throughput

Applications

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

Procurement Notes

Verify the package type matches the 'QSOP' designation in the model suffix. Confirm the specific grade (AD7873A1 vs AD7873B1) required for integral nonlinearity and offset error tolerances. Ensure the operating environment stays within the specified -40°C to +85°C commercial temperature range.

Selection Notes

Select this component for battery-powered systems requiring integrated touch screen driving capabilities. The ratiometric conversion mode eliminates errors caused by on-board switch resistances. Consider the auxiliary analog input channel if additional monitoring beyond touch coordinates and battery voltage is needed.

Part Context

The AD7873 belongs to Analog Devices' family of touch screen digitizers. It combines ADC functionality with multiplexed inputs for X/Y coordinates, battery voltage, and temperature. The ARQ suffix indicates the 16-lead Quarter Size Outline Package (QSOP), distinguishing it from TSSOP or LFCSP variants.