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AD7873ARQ

更新时间： 2024-01-07 05:01:53
品牌 Logo 应用领域
罗彻斯特 - ROCHESTER 光电二极管商用集成电路
页数 文件大小 规格书
29页 1547K
描述
SPECIALTY CONSUMER CIRCUIT, PDSO16, 0.150 INCH, MO-137AB, QSOP-16

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AD7873ARQ 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：SSOP
包装说明：0.150 INCH, MO-137AB, QSOP-16针数：16
Reach Compliance Code：unknown风险等级：5.62
其他特性：FUNCTIONALLY IT OPERATES FROM 2.2 TO 5.25V商用集成电路类型：CONSUMER CIRCUIT
JESD-30 代码：R-PDSO-G16JESD-609代码：e0
长度：4.9022 mm湿度敏感等级：1
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
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：240认证状态：COMMERCIAL
座面最大高度：1.7526 mm最大供电电压 (Vsup)：3.6 V
最小供电电压 (Vsup)：2.2 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：TIN LEAD
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：3.9116 mmBase Number Matches：1

AD7873ARQ 数据手册

 浏览型号AD7873ARQ的Datasheet PDF文件第1页浏览型号AD7873ARQ的Datasheet PDF文件第3页浏览型号AD7873ARQ的Datasheet PDF文件第4页浏览型号AD7873ARQ的Datasheet PDF文件第5页浏览型号AD7873ARQ的Datasheet PDF文件第6页浏览型号AD7873ARQ的Datasheet PDF文件第7页 
Touch Screen Digitizer  
AD7873  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
+V  
4-wire touch screen interface  
PENIRQ  
CC  
On-chip temperature sensor: −40°C to +85°C  
On-chip 2.5 V reference  
Direct battery measurement (0 V to 6 V)  
Touch pressure measurement  
PEN  
INTERRUPT  
TEMP  
SENSOR  
X+  
X–  
Specified throughput rate of 125 kSPS  
Single supply, VCC of 2.2 V to 5.25 V  
Ratiometric conversion  
AD7873  
Y+  
Y–  
T/H  
6-TO-1  
I/P  
MUX  
High speed serial interface  
AUX  
Programmable 8-bit or 12-bit resolution  
One auxiliary analog input  
COMP  
BATTERY  
MONITOR  
Shutdown mode: 1 μA maximum  
16-lead QSOP, TSSOP, and LFCSP packages  
V
BAT  
V
REF  
APPLICATIONS  
GND  
Personal digital assistants  
Smart hand-held devices  
Touch screen monitors  
Point-of-sale terminals  
Pagers  
CHARGE  
REDISTRIBUTION  
DAC  
+V  
CC  
2.5V  
REF  
BUF  
SAR + ADC  
CONTROL LOGIC  
GENERAL DESCRIPTION  
The AD7873 is a 12-bit successive approximation ADC with a  
synchronous serial interface and low on resistance switches for  
driving touch screens. The AD7873 operates from a single 2.2 V  
to 5.25 V power supply and features throughput rates greater  
than 125 kSPS.  
SPORT  
DIN  
DOUT  
DCLK  
BUSY  
CS  
Figure 1.  
PRODUCT HIGHLIGHTS  
The AD7873 features direct battery measurement, temperature  
measurement, and touch pressure measurement. The AD7873  
also has an on-board reference of 2.5 V that can be used for the  
auxiliary input, battery monitor, and temperature measurement  
modes. When not in use, the internal reference can be shut  
down to conserve power. An external reference can also be  
applied and can be varied from 1 V to VCC and 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 μA.  
1. Ratiometric conversion mode available, eliminating errors  
due to on-board switch resistances.  
2. On-board temperature sensor: −40°C to +85°C.  
3. Battery monitor input.  
4. Touch pressure measurement capability.  
5. Low power consumption of 1.37 mW maximum with the  
reference off, or 2.41 mW typical with the reference on, at  
125 kSPS and VCC at 3.6 V.  
The AD7873 features on-board switches. This, coupled with low  
power and high speed operation, makes the 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), a 16-lead, thin shrink small outline package (TSSOP),  
and a 16-lead, lead frame chip scale package (LFCSP).  
6. Package options include 4 mm × 4 mm LFCSP.  
7. Analog input range from 0 V to VREF  
8. Versatile serial I/O ports.  
.
Rev. E  
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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
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