Datasheet Texas Instruments ADS7845

Manufacturer	Texas Instruments
Series	ADS7845

Datasheets

Prices

Status

Packaging

Parametrics

Parameters / Models	ADS7845E	ADS7845E/2K5	ADS7845E/2K5G4	ADS7845EG4
Control Interface	SPI	SPI	SPI	SPI
Input Type	Differential,Single-Ended	Differential,Single-Ended	Differential,Single-Ended	Differential,Single-Ended
Operating Temperature Range, C	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package Group	SSOP	SSOP	SSOP	SSOP
Package Size: mm2:W x L, PKG	16SSOP: 19 mm2: 3.9 x 4.9(SSOP)	16SSOP: 19 mm2: 3.9 x 4.9(SSOP)	16SSOP: 19 mm2: 3.9 x 4.9(SSOP)	16SSOP: 19 mm2: 3.9 x 4.9(SSOP)
Rating	Catalog	Catalog	Catalog	Catalog
SAR ADC Resolution, Bits	12	12	12	12
SAR Sample Rate(Max), kSPS	125	125	125	125
Supply Voltage (Analog), Max	2.7	2.7	2.7	2.7
Supply Voltage (I/O VDD), Max	2.7	2.7	2.7	2.7
Touch Panel	5-Wire	5-Wire	5-Wire	5-Wire
Vref, Int/Ext	Ext	Ext	Ext	Ext

Eco Plan

Application Notes

• Download
  Analog-to-Digital Converter Grounding Practices Affect System Performance (Rev. A)
  PDF, 69 Kb, Revision: A, File published: May 18, 2015
• Download
  Q4 2007 Issue Analog Applications Journal (Rev. A)
  PDF, 316 Kb, Revision: A, File published: Nov 14, 2007
• Download
  A Glossary of Analog-to-Digital Specifications and Performance Characteristics (Rev. B)
  PDF, 425 Kb, Revision: B, File published: Oct 9, 2011
  This glossary is a collection of the definitions of Texas Instruments' Delta-Sigma (О”ОЈ), successive approximation register (SAR), and pipeline analog-to-digital (A/D) converter specifications and performance characteristics. Although there is a considerable amount of detail in this document, the product data sheet for a particular product specification is the best and final reference.
• Download
  Using a touch-screen controller’s auxiliary inputs
  PDF, 149 Kb, File published: Oct 12, 2007
• Download
  Touch Screen Controller Tips
  PDF, 86 Kb, File published: Sep 27, 2000
  The ADS7843, ADS7845, and the new ADS7846 converters all are designed for specific touch screen applications. Applications using these devices can benefit greatly from the tips presented in this application bulletin. Most of the examples discuss the ADS7843, but the techniques shown are applicable to all of the devices.
• Download
  Calibration in touch-screen systems
  PDF, 169 Kb, File published: Aug 10, 2007
• Download
  Operation Schemes of Touch Screen Controllers
  PDF, 846 Kb, File published: May 21, 2007
• Download
  Apply TI TSC for Various and Multiple Functions
  PDF, 316 Kb, File published: Dec 11, 2006
  This application report presents several examples showing how a touch screen controller (TSC) from Texas Instruments provides a variety of functions such as graphs, scroll bars, pressure buttons, and analog dials. A simple resistive TSC can be used to achieve all of these functions as long as they are not activated simultaneously. This application report demonstrates a few simple examples how th
• Download
  Reducing Analog Input Noise in Touch Screen Systems (Rev. A)
  PDF, 535 Kb, Revision: A, File published: Sep 15, 2007
  This application report discusses some common methods for reducing noise in the analog input circuitry of a resistive touch screen controller. In terms of hardware design, PCB layout and grounding are critical; the additional noise-decoupling capacitor built into a touch screen controller input pin may also help. On the software side, several simple, widely-applied filtering algorithms are present
• Download
  PCB Layout Guideline for TI Resistive TSC Devices
  PDF, 144 Kb, File published: Oct 4, 2012
• Download
  Principles of Data Acquisition and Conversion (Rev. A)
  PDF, 132 Kb, Revision: A, File published: Apr 16, 2015

Model Line

Manufacturer's Classification

• Semiconductors> Data Converters> Integrated/Special Function Data Converters> Touch Screen Controllers