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AD7148ACPZ-1500RL7 PDF预览

AD7148ACPZ-1500RL7

更新时间： 2024-02-28 23:18:58
品牌 Logo 应用领域
亚德诺 - ADI 传感器消费电路商用集成电路控制器
页数 文件大小 规格书
56页 855K
描述
Programmable Touch Controller for Single Electrode Capacitance Sensors

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AD7148ACPZ-1500RL7 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：4 X 4 MM, ROHS COMPLIANT, MO-220-VGGC, LFCSP-16针数：16
Reach Compliance Code：unknown风险等级：5.69
Is Samacsys：N商用集成电路类型：CONSUMER CIRCUIT
JESD-30 代码：S-PQCC-N16JESD-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：PLASTIC/EPOXY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)：3.3 V
最小供电电压 (Vsup)：2.6 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 mmBase Number Matches：1

AD7148ACPZ-1500RL7 数据手册

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Programmable Touch Controller for  
Single Electrode Capacitance Sensors  
AD7148  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
AC  
V
SHIELD  
CC  
GND  
BIAS  
Programmable capacitance-to-digital converter (CDC)  
Femtofarad (fF) resolution  
8 capacitance sensor inputs  
5
8
7
6
AD7148  
13  
CIN0  
POWER-ON  
RESET  
LOGIC  
25 ms update rate, all 8 sensor inputs  
No external RC components required  
Automatic conversion sequencer  
On-chip automatic calibration logic  
Automatic compensation for environmental changes  
Automatic adaptive threshold and sensitivity levels  
Register map compatible with AD7143  
On-chip RAM to store calibration data  
I2C-compatible serial interface  
EXCITATION  
SOURCE  
CIN1 14  
CIN2  
CIN3  
CIN4  
CIN5  
CIN6  
CIN7  
15  
CALIBRATION  
RAM  
16  
1
16-BIT  
Σ-Δ  
CDC  
CALIBRATION  
ENGINE  
2
CONTROL  
AND  
3
4
DATA  
REGISTERS  
Separate VDRIVE level for serial interface  
Interrupt output  
16-lead, 4 mm × 4 mm LFCSP  
2.6 V to 3.3 V supply voltage  
Low operating current  
INTERRUPT  
AND GPIO  
LOGIC  
SERIAL INTERFACE  
AND CONTROL LOGIC  
Full power mode: 1 mA  
Low power mode: 21.5 μA  
10  
11  
12  
9
V
SDA  
SCLK  
INT  
DRIVE  
APPLICATIONS  
Figure 1.  
Cell phones  
Personal music and multimedia players  
Smart handheld devices  
Television, A/V, and remote controls  
Gaming consoles  
Digital still cameras  
GENERAL DESCRIPTION  
The AD7148 is designed for single electrode capacitance sensors  
(grounded sensors). There is an active shield output to minimize  
noise pickup in the sensor. For floating, or two, electrode sensors,  
use the AD7143.  
The AD7148 is designed for use with capacitance sensors imple-  
menting functions such as buttons, scroll bars, and wheels.  
The sensors need only one PCB layer, enabling ultrathin  
applications.  
The AD7148 has on-chip calibration logic to compensate for  
changes in the ambient environment. The calibration sequence is  
performed automatically and at continuous intervals as long as  
the sensors are not touched. This ensures that there are no false  
or nonregistering touches on the external sensors due to a  
changing environment.  
The AD7148 is an integrated capacitance-to-digital converter  
(CDC) with on-chip environmental calibration. The CDC has  
eight inputs channeled through a switch matrix to a 16-bit,  
250 kHz sigma-delta (∑-Δ) converter. The CDC is capable of  
sensing changes in the capacitance of the external sensors and  
uses this information to register a sensor activation. The external  
sensors can be arranged as a series of buttons, as a scroll bar or  
wheel, or as a combination of sensor types. By programming the  
registers, the user has full control over the CDC setup.  
The AD7148 has an I2C®-compatible serial interface, as well as  
an interrupt output. There is a VDRIVE pin to set the voltage level  
for the serial interface independent of VCC  
.
High resolution sensors require minimal software to run on the  
host processor.  
The AD7148 is available in a 16-lead, 4 mm × 4 mm LFCSP and  
operates from a 2.6 V to 3.6 V supply. The operating current  
consumption in low power mode is typically 26 μA.  
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 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  
©2007 Analog Devices, Inc. All rights reserved.  
 
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