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參數(shù)資料
| 型號： | EVAL-AD7843CB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Touch Screen Digitizer |
| 中文描述： | 觸摸屏數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 193K |
| 代理商： | EVAL-AD7843CB |
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD7843
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2000
Touch Screen Digitizer
FUNCTIONAL BLOCK DIAGRAM
PEN
INTERRUPT
DCLK
GND
+V
CC
BUSY
PENIRQ
SAR + ADC
CONTROL LOGIC
SPORT
CS
DOUT
DIN
4-TO-1
I/P
MUX
AD7843
+V
CC
IN3
IN4
V
REF
Y–
Y+
X–
X+
T/H
CHARGE
REDISTRIBUTION
DAC
COMP
GENERAL DESCRIPTION
The AD7843 is a 12-bit successive-approximation ADC with a
synchronous serial interface and low on resistance switches for
driving touch screens. The part operates from a single 2.2 V to
5.25 V power supply and features throughput rates greater than
125 kSPS.
The external reference applied to the AD7843 can be varied
from 1 V to +V
CC
, while the analog input range is from 0 V to
V
REF
. The device includes a shutdown mode that reduces the
current consumption to less than 1
μ
A.
The AD7843 features on-board switches. This coupled with low
power and high-speed operation make this device ideal for
battery-powered systems such as personal digital assistants with
resistive touch screens and other portable equipment. The part
is available in a 16-lead 0.15" Quarter Size Outline (QSOP) pack-
age and a 16-lead Thin Shrink Small Outline (TSSOP) package.
FEATURES
4-Wire Touch Screen Interface
Specified Throughput Rate of 125 kSPS
Low Power Consumption:
1.37 mW Max at 125 kSPS with V
CC
= 3.6 V
Single Supply, V
CC
of 2.2 V to 5.25 V
Ratiometric Conversion
High-Speed Serial Interface
Programmable 8- or 12-Bit Resolution
Two Auxiliary Analog Inputs
Shutdown Mode: 1 A max
16-Lead QSOP and TSSOP Packages
APPLICATIONS
Personal Digital Assistants
Smart Hand-Held Devices
Touch Screen Monitors
Point-of-Sales Terminals
Pagers
PRODUCT HIGHLIGHTS
1. Ratiometric conversion mode available eliminating errors
due to on-board switch resistances.
2. Maximum current consumption of 380
μ
A while operating at
125 kSPS.
3. Power-down options available.
4. Analog input range from 0 V to V
REF
.
5. Versatile serial I/O port.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD7843CB3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Touch Screen Digitizer |
| EVAL-AD7843EBZ | 功能描述:BOARD EVAL FOR AD7843 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7851CB | 制造商:Analog Devices 功能描述:14-BIT 333 KSPS SERIAL A/D CONVERTER 制造商:Analog Devices 功能描述:EVALUATION CONTROL BOARD I.C. - Bulk |
| EVAL-AD7851CB4 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit 333 kSPS Serial A/D Converter |
| EVAL-AD7853CB | 制造商:Analog Devices 功能描述:EVALUATION CONTROL BOARD - Bulk |
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