12-bit Analog-to-Digital Converter (ADC) with a synchronous serial interface and touch screen con
Product details
Parameters
Package | Pins | Size
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
- APPLICATIONS
- PERSONAL DIGITAL ASSISTANTS
- PORTABLE INSTRUMENTS
- POINT-OF-SALES TERMINALS
- PAGERS
- TOUCH SCREEN MONITORS
US Patent No. 6246394
Description
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | ADS7843: Touch Screen Controller datasheet (Rev. B) | Mar. 26, 2002 |
Application note | PCB Layout Guideline for TI Resistive TSC Devices | Oct. 04, 2012 | |
Application note | Using a touch-screen controller’s auxiliary inputs | Oct. 12, 2007 | |
Application note | Reducing Analog Input Noise in Touch Screen Systems (Rev. A) | Sep. 15, 2007 | |
Application note | Calibration in touch-screen systems | Aug. 10, 2007 | |
Application note | Operation Schemes of Touch Screen Controllers | May 21, 2007 | |
Application note | Apply TI TSC for Various and Multiple Functions | Dec. 11, 2006 | |
Application note | How to Use TI's 4-Wire TSC to Control an 8-Wire Resistive Touch Screen | Mar. 27, 2006 | |
User guide | DEM-CIB Evaluation Fixture Computer Interface Board | Feb. 13, 2001 | |
Application note | ADS7843 Pen Interrupt | Sep. 27, 2000 | |
User guide | DEM-ADS7843E: Demonstration Fixture for the ADS7843 | Sep. 27, 2000 | |
Application note | Touch Screen Controller Tips | Sep. 27, 2000 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SSOP (DBQ) | 16 | View options |
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