Datasheet Texas Instruments LM8500 — 数据表

LM8300, LM8500
www.ti.com SNAS158B – OCTOBER 2002 – REVISED MARCH 2013 LM8300/LM8500 Four Wire Resistive Touchscreen Controller with Brownout
Check for Samples: LM8300, LM8500 FEATURES DESCRIPTION The LM8300/8500 is a 4-wire resistive touch screen
controller. The controller samples and drives the
touch screen without the need of any external
hardware. The built in 10-bit A/D provides a
maximum of 500 coordinate pairs per second (cpps).
The data sampled from the touch screen is sent out
on the UART at a speed of 38400 bps. 1 2 Supports 4 Wire Resistive Touch Panels
Low Power Standby Current Typically Less
Than 2 ВµA at 5.5V
Maximum Speed of 500 Coordinate Pairs per
Second
Automatic Wake Up and Return to Standby
10 bit A/D
On-chip Touch Screen Current Drivers -No
External Driver Required
UART Interface
Controller Configurations are Stored in the
Internal Non-volatile Storage Element
Touch Pressure can be Measured APPLICATIONS Personal Digital Assistants
Smart Hand-Held Devices
Touch Screen Monitors …