AD7843ARQ-REEL

$1.52

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

SKU:0a82de8767d9 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：Bulk
Touchscreen：-
Resolution (Bits)：12 b
Interface：-
Voltage Reference：External
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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AD7843ARQ-REEL

Overview

The AD7843ARQ-REEL is a 12-bit successive approximation analog-to-digital converter (ADC) designed for touch screen digitizer applications. It features a synchronous serial interface and integrated low on-resistance switches for driving resistive touch screens. The device operates from a single 2.2 V to 5.25 V supply, achieving throughput rates exceeding 125 kSPS with power consumption as low as 1.37 mW at maximum speed. It supports programmable 8-bit or 12-bit resolution, includes two auxiliary analog inputs, and offers a shutdown mode with current draw under 1 µA.

Feature Summary

12-bit SAR ADC with 125 kSPS throughput rate
Integrated 4-wire touch screen interface with low on-resistance switches
Single supply operation from 2.2 V to 5.25 V
Programmable 8-bit or 12-bit resolution via control register
Shutdown mode reduces current consumption to <1 µA

Applications

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

Procurement Notes

Verify the package type matches the 'Q' suffix designation, which indicates a 16-lead Quarter Size Outline Package (QSOP). Confirm the 'REEL' suffix corresponds to tape-and-reel packaging requirements for automated assembly processes. Ensure the voltage grade 'A' meets the specified -40°C to +85°C operating temperature range.

Selection Notes

Select this component when a ratiometric conversion mode is required to eliminate errors caused by internal switch resistances in resistive touch screen interfaces. Choose the AD7843 for battery-powered systems needing low power consumption and high-speed data acquisition. Verify that the external reference voltage range of 1 V to VCC aligns with the system design constraints.

Part Context

This part belongs to the AD7843 family of touch screen digitizers manufactured by Analog Devices Inc. The 'ARQ' designation specifies the commercial temperature grade (-40°C to +85°C), QSOP package, and reel packaging. It serves as a specialized solution for portable electronics requiring precise coordinate tracking with minimal power overhead.