ADS7843-Q1
www.ti.com
SBAS504A –MARCH 2011–REVISED JULY 2012
TOUCH SCREEN CONTROLLER
Check for Samples: ADS7843-Q1
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FEATURES
DESCRIPTION
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Qualified for Automotive Applications
Ratiometric Conversion
The ADS7843-Q1 is a 12-bit sampling Analog-to-
Digital Converter (ADC) with a synchronous serial
interface and low on-resistance switches for driving
touch screens. Typical power dissipation is 750µW at
a 125kHz throughput rate and a +2.7V supply. The
reference voltage (VREF) can be varied between 1V
and +VCC, providing a corresponding input voltage
range of 0V to VREF. The device includes a shutdown
mode which reduces typical power dissipation to
under 0.5µW. The ADS7843-Q1 is specified down to
2.7V operation.
Single Supply: 2.7V to 5V
Up to 125kHz Conversion Rate
Serial Interface
Programmable 8- or 12-Bit Resolution
2 Auxiliary Analog Inputs
Full Power-Down Control
APPLICATIONS
Low power, high speed, and onboard switches make
the ADS7843-Q1 ideal for battery-operated systems
such as personal digital assistants with resistive
touch screens and other portable equipment. The
ADS7843-Q1 is available in an SSOP-16 package
and is specified over the –40°C to +85°C temperature
range.
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Personal Digital Assistants
Portable Instruments
Point-of-Sales Terminals
Pagers
Touch Screen Monitors
ORDERING INFORMATION(1)
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PACKAGE(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
–40°C to 85°C
SSOP-16 – DBQ Tape and reel
ADS7843IDBQRQ1
S7843Q
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2011–2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.