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AD7873ACPZ-REEL7 PDF预览

AD7873ACPZ-REEL7

更新时间: 2024-02-14 02:36:32
品牌 Logo 应用领域
亚德诺 - ADI 消费电路商用集成电路
页数 文件大小 规格书
29页 600K
描述
Touch Screen Digitizer

AD7873ACPZ-REEL7 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:QFN
包装说明:HVQCCN,针数:16
Reach Compliance Code:unknown风险等级:5.05
Is Samacsys:N其他特性:FUNCTIONALLY IT OPERATES FROM 2.2 TO 5.25V
商用集成电路类型:CONSUMER CIRCUITJESD-30 代码:S-XQCC-N16
JESD-609代码:e3长度:4 mm
湿度敏感等级:3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:UNSPECIFIED
封装代码:HVQCCN封装形状:SQUARE
封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度(摄氏度):260
认证状态:COMMERCIAL座面最大高度:1 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:MATTE TIN端子形式:NO LEAD
端子节距:0.65 mm端子位置:QUAD
处于峰值回流温度下的最长时间:40宽度:4 mm
Base Number Matches:1

AD7873ACPZ-REEL7 数据手册

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Touch Screen Digitizer  
Data Sheet  
AD7873  
FEATURES  
4-wire touch screen interface  
FUNCTIONAL BLOCK DIAGRAM  
+V  
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  
High speed serial interface  
Programmable 8-bit or 12-bit resolution  
One auxiliary analog input  
AD7873  
Y+  
Y–  
T/H  
6-TO-1  
I/P  
MUX  
AUX  
COMP  
BATTERY  
MONITOR  
Shutdown mode: 1 µA maximum  
16-lead QSOP, TSSOP, and LFCSP packages  
V
BAT  
APPLICATIONS  
V
REF  
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 supply, with a throughput rate of 125 kSPS.  
SPORT  
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 varied from 1 V to VCC with an analog input range  
from 0 V to VREF. The device includes a shutdown mode that  
reduces the current consumption to less than 1 µA.  
DIN  
DOUT  
DCLK  
BUSY  
CS  
Figure 1.  
PRODUCT HIGHLIGHTS  
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.  
The AD7873 features on-board switches. This, coupled with low  
power and high speed operation, makes the device ideal for  
battery-powered systems with resistive touch screens. The part  
is available in a 16-lead, 0.15 inch quarter size outline package  
(QSOP), a 16-lead, thin shrink small outline package (TSSOP),  
and a 16-lead, lead frame chip scale package (LFCSP).  
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.  
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. F  
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: 781.461.3113  
www.analog.com  
©2013 Analog Devices, Inc. All rights reserved.  
 
 
 
 
 

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