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ADS7843

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12-bit Analog-to-Digital Converter (ADC) with a synchronous serial interface and touch screen con

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Data sheet

ADS7843

LAST TIME BUY
Data sheet Order now

Product details

Control interface SPI Rating Catalog Operating temperature range (°C) -40 to 85
Control interface SPI Rating Catalog Operating temperature range (°C) -40 to 85
SSOP (DBQ) 16 29.4 mm² 4.9 x 6
  • 4-WIRE TOUCH SCREEN INTERFACE
  • 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

US Patent No. 6246394
  • 4-WIRE TOUCH SCREEN INTERFACE
  • 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

US Patent No. 6246394

The ADS7843 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 750uW 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 0.5uW. The ADS7843 is specified down to 2.7V operation.

Low power, high speed, and onboard switches make the ADS7843 ideal for battery-operated systems such as personal digital assistants with resistive touch screens and other portable equipment. The ADS7843 is available in an SSOP-16 package and is specified over the –40°C to +85°C temperature range.

The ADS7843 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 750uW 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 0.5uW. The ADS7843 is specified down to 2.7V operation.

Low power, high speed, and onboard switches make the ADS7843 ideal for battery-operated systems such as personal digital assistants with resistive touch screens and other portable equipment. The ADS7843 is available in an SSOP-16 package and is specified over the –40°C to +85°C temperature range.
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Type Title Date
* Data sheet ADS7843: Touch Screen Controller datasheet (Rev. B) 26 Mar 2002

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