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ADS7846E2K5G4 参数 Datasheet PDF下载

ADS7846E2K5G4图片预览
型号: ADS7846E2K5G4
PDF下载: 下载PDF文件 查看货源
内容描述: 触摸屏控制器 [TOUCH SCREEN CONTROLLER]
分类和应用: 控制器
文件页数/大小: 30 页 / 1226 K
品牌: TI [ TEXAS INSTRUMENTS ]
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ADS7846
ADS
784
6
AD
S78
46
®
AD
S78
46
SBAS125H – SEPTEMBER 1999 – REVISED JANUARY 2005
TOUCH SCREEN CONTROLLER
FEATURES
q
SAME PINOUT AS ADS7843
q
2.2V TO 5.25V OPERATION
q
INTERNAL 2.5V REFERENCE
q
DIRECT BATTERY MEASUREMENT (0V to 6V)
q
ON-CHIP TEMPERATURE MEASUREMENT
q
TOUCH-PRESSURE MEASUREMENT
q
QSPI
TM
/SPI
TM
3-WIRE INTERFACE
q
AUTO POWER-DOWN
q
TSSOP-16, SSOP-16, QFN-16,
AND VFBGA-48 PACKAGES
DESCRIPTION
The ADS7846 is a next-generation version to the industry
standard ADS7843 4-wire touch screen controller. The
ADS7846 is 100% pin-compatible with the existing ADS7843,
and drops into the same socket. This allows for easy upgrade
of current applications to the new version. Only software
changes are required to take advantage of the added fea-
tures of direct battery measurement, temperature measure-
ment, and touch-pressure measurement. The ADS7846 also
has an on-chip 2.5V reference that can be used for the
auxiliary input, battery monitor, and temperature measure-
ment modes. The reference can also be powered down when
not used to conserve power. The internal reference operates
down to 2.7V supply voltage while monitoring the battery
voltage from 0V to 6V.
The low-power consumption of < 0.75mW (typ at 2.7V,
reference off), high speed (up to 125kHz clock rate), and on-
chip drivers make the ADS7846 an ideal choice for battery-
operated systems such as personal digital assistants (PDAs)
with resistive touch screens, pagers, cellular phones, and
other portable equipment. The ADS7846 is available in the
small TSSOP-16, SSOP-16, QFN-16, and VFBGA-48 pack-
ages and is specified over the –40°C to +85°C temperature
range.
PENIRQ
APPLICATIONS
q
q
q
q
q
q
PERSONAL DIGITAL ASSISTANTS
PORTABLE INSTRUMENTS
POINT-OF-SALE TERMINALS
PAGERS
TOUCH SCREEN MONITORS
CELLULAR PHONES
US Patent No. 6246394
QSPI and SPI are registered trademarks of Motorola.
+V
CC
X+
X–
Temperature
Sensor
SAR
Y+
Y–
ADS7846
DOUT
BUSY
Comparator
6-Channel
MUX
CDAC
Serial
Data
Out
CS
V
BAT
AUX
Battery
Monitor
DCLK
DIN
V
REF
Internal 2.5V
Reference
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1999-2005, Texas Instruments Incorporated
www.ti.com