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MFG:BB  Package Cooled:SOP-16  D/C:N/A  

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Part Number: ADS7845

 

MFG: BB

Package Cooled: SOP-16

D/C: N/A

Description: The ADS7845 is a 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface...


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ADS7845 General Description


The ADS7845 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 750mW 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 0.5mW.

The ADS7845 is guaranteed down to 2.7V operation. Low power, high speed, and on-board switches make the ADS7845 ideal for battery-operated systems such as personal digital assistants with resistive touch screens and other portable equipment. The ADS7845 is available in a 16-lead SSOP package and is guaranteed over the 40°C to +85°C temperature range.

ADS7845 Maximum Ratings

+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°C
Operating Temperature Range ..........................  40°C to +85°C
Storage Temperature Range ............................ 65°C to +150°C
Lead Temperature (soldering, 10s) .................................... +300°C
NOTE: (1) Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability.

ADS7845 Features

·5-WIRE TOUCH SCREEN INTERFACE
·RATIOMETRIC CONVERSION
·SINGLE SUPPLY: 2V to 5V
·UP TO 125kHz CONVERSION RATE
·SERIAL INTERFACE
·PROGRAMMABLE 8- OR 12-BIT RESOLUTION
·AUXILIARY ANALOG INPUTS
·FULL POWER-DOWN CONTROL

ADS7845 Typical Application

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

ADS7845 Connection Diagram

ADS7845 Connection Diagram

ADS7845 datasheet

ADS7845
PDF/DataSheet Download

Find ADS7845 Suppliers

  • ·ADS1100
  • BURR-BROWN [Burr-Brown Corporation] 
  • Self-Calibrating, 16-Bit ANALOG-TO-DIGITAL CONVERTER 
  • 189503 KB
  • ADS1100 Datasheet Download
  • ·ADS1100A7IDBVR
  • BURR-BROWN 
  • 1.2-V, 12-/10-/8-BIT, 200-KSPS/100-KSPS, MICRO-POWER, MINIATURE ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE  
  • 288993 KB
  • ADS1100A7IDBVR Datasheet Download
  • ·ADS1100A7IDBVT
  • BURR-BROWN 
  • 1.2-V, 12-/10-/8-BIT, 200-KSPS/100-KSPS, MICRO-POWER, MINIATURE ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE  
  • 288993 KB
  • ADS1100A7IDBVT Datasheet Download
  • ·ADS1100IDBVR
  • BURR-BROWN [Burr-Brown Corporation] 
  • Self-Calibrating, 16-Bit ANALOG-TO-DIGITAL CONVERTER 
  • 189503 KB
  • ADS1100IDBVR Datasheet Download
  • ·ADS1100IDBVT
  • BURR-BROWN [Burr-Brown Corporation] 
  • Self-Calibrating, 16-Bit ANALOG-TO-DIGITAL CONVERTER 
  • 189503 KB
  • ADS1100IDBVT Datasheet Download
  • ·ADS1110
  • TI [Texas Instruments] 
  • 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference 
  • 532959 KB
  • ADS1110 Datasheet Download
  • ·ADS1110A0IDBVR
  • TI [Texas Instruments] 
  • 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference 
  • 532959 KB
  • ADS1110A0IDBVR Datasheet Download
  • ·ADS1110A0IDBVT
  • TI [Texas Instruments] 
  • 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference 
  • 532959 KB
  • ADS1110A0IDBVT Datasheet Download

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