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ADS7843

Features: 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 INPUTSFULL POWER-DOWN CONTROLApplication PERSONAL DIGITAL ASSISTANTS PORTABLE INSTRUMENTS POINT-OF-SALES T...

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SeekIC No. : 004277254 Detail

ADS7843: Features: 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...

ADS7843 Data Sheet

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Part Number:
ADS7843
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/2/15

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Product Details

Description



Features:

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


Application

PERSONAL DIGITAL ASSISTANTS
PORTABLE INSTRUMENTS
POINT-OF-SALES TERMINALS
PAGERS
 TOUCH SCREEN MONITORS


Pinout

Connection Diagram


Specifications

+VCC to GND ............................................................................................................. 0.3V to +6V
Analog Inputs to GND .................................................................................. 0.3V to +VCC + 0.3V
Digital Inputs to GND ................................................................................... 0.3V to +VCC + 0.3V
Power Dissipation .............................................................................................................. 250mW
Maximum Junction Temperature .......................................................................................... +150
Operating Temperature Range .............................................................................. 40 to +85
Storage Temperature Range ............................................................................... 65 to +150
Lead Temperature (soldering, 10s) .................................................................................... +300


Description

The ADS7843 is a 12-bit sampling Analog-to-Digital Converter (ADC) with a synchronous serial interface and low onresistance switches for driving touch screens. Typical power dissipation is 750W 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 0.5W. 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. It is available in an SSOP-16 package and is specified over the 40 to +85 temperature range.

 


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