參數資料
| 型號： | AD7843ARQZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/21頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT TOUCHSCREEN 16-QSOP |
| 標準包裝： | 98 |
| 類型： | 電阻 |
| 觸摸面板接口： | 4 線 |
| 輸入數/鍵： | 1 TSC |
| 分辨率（位）： | 12 b |
| 評估套件： | 可供 |
| 數據接口： | 串行 |
| 數據速率/采樣率 (SPS，BPS)： | 125k |
| 電壓基準： | 外部 |
| 電源電壓： | 2.2 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-QSOP |
| 包裝： | 管件 |
| 配用： | EVAL-AD7843EBZ-ND - BOARD EVAL FOR AD7843 |
Touch Screen Digitizer
AD7843
Rev. B
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
FEATURES
4-wire touch screen interface
Specified throughput rate of 125 kSPS
Low power consumption:
1.37 mW max at 125 kSPS with VCC = 3.6 V
Single supply, VCC of 2.2 V to 5.25 V
Ratiometric conversion
High speed serial interface
Programmable 8-bit or 12-bit resolution
2 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
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 +VCC, while the analog input range is from 0 V to
VREF. The device includes a shutdown mode that reduces the
current consumption to less than 1 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 package
(QSOP) and a 16-lead thin shrink small outline package
(TSSOP).
FUNCTIONAL BLOCK DIAGRAM
02144-B
-001
AD7843
+VCC
PENIRQ
SPORT
DIN
CS
DOUT
DCLK
BUSY
PEN
INTERRUPT
CHARGE
REDISTRIBUTION
DAC
SAR + ADC
CONTROL LOGIC
4-TO-1
I/P
MUX
T/H
COMP
GND
X+
Y+
X–
Y–
IN3
IN4
VREF
Figure 1.
PRODUCT HIGHLIGHTS
1.
Ratiometric conversion mode available eliminating errors
due to on-board switch resistances.
2.
Maximum current consumption of 380 A while operating
at 125 kSPS.
3.
Power-down options available.
4.
Analog input range from 0 V to VREF.
5.
Versatile serial I/O port.
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相關代理商/技術參數 |
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| AD7843ARQZ2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Touch Screen Digitizer |
| AD7843ARQZ-REEL | 功能描述:IC ADC 12BIT TOUCHSCREEN 16-QSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數/鍵:- 分辨率（位）:- 評估套件:* 數據接口:- 數據速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD7843ARQZ-REEL2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Touch Screen Digitizer |
| AD7843ARQZ-REEL7 | 功能描述:IC ADC 12BIT TOUCHSCREEN 16-QSOP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數/鍵:- 分辨率（位）:- 評估套件:* 數據接口:- 數據速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD7843ARQZ-REEL72 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Touch Screen Digitizer |
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