SS7646 datasheet(1/13 Pages) SSC

Numer części	SS7646

Szczegółowy opis	Touch Screen Controller

PDF	13 Pages

Scroll/Zoom	100%

Producent	SSC [Silicon Standard Corp.]

Strona internetowa	http://www.siliconstandard.com

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SS7646

8/21/2004 Rev.2.01

Touch Screen Controller

FEATURES

DESCRIPTION

Pin compatible with SS7643

Serial interface

Interface for 4-wire touch-screen

Embedded touch-screen drivers

Internal 2.5V reference

Direct battery measurement (0V to 6V)

Touch-pressure measurement

One auxiliary analog input

On-chip temperature sensor

Supply voltage from 2.2V to 5.5V

12-bit analog-to-digital converter

Programmable 8- or 12-bit resolution

Conversion rate up to 125kHz

Full power-down control

16 pin SSOP package

APPLICATIONS

Touch-screen Monitors

Personal Digital Assistants

Point-of-Sale Terminals

Pagers

High-Speed Data Acquisition

Portable Instruments

Low-power Instruments

The SS7646 touch-screen controller IC is an advanced

version of the previous controller, the SS7643.

The SS7646 is a 12-biit SAR analog-to-digital converter

(ADC) with SPI serial interface and low-on resistance

drivers for 4-wire resistive touch screens. The SS7646

is fully pin-compatible with the SS7643.

The SS7646 is a highly-integrated controller for portable

applications using 4-wire resistive touch screens, such

as PDAs, portable instruments, cell phones, etc. The

SS7646 contains all the analog and digital circuitry

necessary to complete a pen request, and features

temperature, battery monitor and touch-pressure

measurements.

The SS7646 also features an internal 2.5V reference

that can be turned ON or OFF independently of the

ADC.

The SS7646 consumes only 405 µW (with the internal

reference OFF) at a sample rate of 125kHz with a 2.7V

supply and consumes less than 2.7 µW in the

shutdown mode. The SS7646 will operate with a

supply down to 2.2V.

The SS7646 is supplied in a very small 16-lead SSOP

package and is guaranteed over the temperature range.

ORDERING INFORMATION

PIN CONFIGURATION

SS7646

15

/CS

16

DCLK

14

DIN

12

DOUT

13

BUSY

11

/PENIRQ

10

2

X+

1

VDD

3

Y+

5

Y-

4

X-

6

GND

7

SSOP-16

8

9

VREF

VDD

VBAT

VIN

SS7646TR

SS7646 in SSOP-16 shipped on

tape and reel

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