AD7843

更新时间： 2024-02-15 04:18:14

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	191K
描述
Touch Screen Digitizer

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技术参数
数据手册

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AD7843 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	TSSOP
包装说明：	TSSOP, TSSOP16,.25	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	2.14
最大模拟输入电压：	3.6 V	最小模拟输入电压：
转换器类型：	ADC, SUCCESSIVE APPROXIMATION	JESD-30 代码：	R-PDSO-G16
JESD-609代码：	e3	长度：	5 mm
最大线性误差 (EL)：	0.0488%	湿度敏感等级：	1
模拟输入通道数量：	4	位数：	12
功能数量：	1	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
输出位码：	BINARY	输出格式：	SERIAL
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP16,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	采样并保持/跟踪并保持：	TRACK
座面最大高度：	1.2 mm	最大压摆率：	0.38 mA
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
宽度：	4.44 mm	Base Number Matches：	1

AD7843 数据手册

Touch Screen Digitizer

AD7843

FEATURES

FUNCTIONAL BLOCK DIAGRAM

4-Wire Touch Screen Interface

Specified Throughput Rate of 125 kSPS

Low Power Consumption:

PENIRQ

1.37 mW Max at 125 kSPS with V_CC= 3.6 V

Single Supply, V_CCof 2.2 V to 5.25 V

Ratiometric Conversion

PEN

INTERRUPT

AD7843

X+

X–

High-Speed Serial Interface

Programmable 8- or 12-Bit Resolution

Two Auxiliary Analog Inputs

Y+

Y–

T/H

4-TO-1

Shutdown Mode: 1

␮A max

I/P

16-Lead QSOP and TSSOP Packages

MUX

IN3

IN4

COMP

APPLICATIONS

Personal Digital Assistants

Smart Hand-Held Devices

Touch Screen Monitors

Point-of-Sales Terminals

Pagers

GND

REF

CHARGE

REDISTRIBUTION

DAC

SAR + ADC

CONTROL LOGIC

SPORT

DOUT

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.

DIN

DCLK

BUSY

PRODUCT HIGHLIGHTS

1. Ratiometric conversion mode available eliminating errors

due to on-board switch resistances.

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

2. Maximum current consumption of 380 µA while operating at

_REF. The device includes a shutdown mode that reduces the

125 kSPS.

current consumption to less than 1 µA.

3. Power-down options available.

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.

4. Analog input range from 0 V to V_REF

5. Versatile serial I/O port.

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7...16

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与AD7843相关器件

型号	品牌	描述	获取价格	数据表
AD7843_17	ADI	Touch Screen Digitizer	获取价格
AD7843ARQ	ADI	Touch Screen Digitizer	获取价格
AD7843ARQ	ROCHESTER	SPECIALTY CONSUMER CIRCUIT, PDSO16, MO-137AB, QSOP-16	获取价格
AD7843ARQ-REEL	ADI	Touch Screen Digitizer	获取价格
AD7843ARQ-REEL7	ADI	Touch Screen Digitizer	获取价格
AD7843ARQ-REEL7	ROCHESTER	SPECIALTY CONSUMER CIRCUIT, PDSO16, MO-137AB, QSOP-16	获取价格

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