ADS7843-Q1 Datasheet, PDF (1/21 Pages) Texas Instruments – TOUCH SCREEN CONTROLLER

ADS7843-Q1
www.ti.com
SBAS504A – MARCH 2011 – REVISED JULY 2012
TOUCH SCREEN CONTROLLER
Check for Samples: ADS7843-Q1
FEATURES
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• Qualified for Automotive Applications
• Ratiometric Conversion
• 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
• Personal Digital Assistants
• Portable Instruments
• Point-of-Sales Terminals
• Pagers
• Touch Screen Monitors
DESCRIPTION
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 (V_REF) can be varied between 1V
and +V_CC, providing a corresponding input voltage
range of 0V to V_REF. 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.
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.
T_A
–40°C to 85°C
ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART NUMBER
SSOP-16 – DBQ
Tape and reel
ADS7843IDBQRQ1
TOP-SIDE MARKING
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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