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FDC1004QDGSTQ1 PDF预览

FDC1004QDGSTQ1

更新时间： 2023-09-03 20:31:19
品牌 Logo 应用领域
德州仪器 - TI 驱动光电二极管驱动器转换器
页数 文件大小 规格书
30页 1099K
描述
具有源屏蔽驱动器的 4 通道、16 位、汽车类电感数字转换器 | DGS | 10 | -40 to 125

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FDC1004QDGSTQ1 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：SSOP
包装说明：TSSOP, TSSOP10,.19,20针数：10
Reach Compliance Code：compliantFactory Lead Time：6 weeks
风险等级：1.77Samacsys Description：Capacitive Touch Sensors Automotive, 4-Channel Capacitance-to-Digital Converter for Capacitive Sensing (Cap Sensing) 10-VSSOP -40 to 125
模拟集成电路 - 其他类型：ANALOG CIRCUITJESD-30 代码：S-PDSO-G10
JESD-609代码：e3长度：3 mm
湿度敏感等级：1信道数量：4
功能数量：1端子数量：10
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP10,.19,20封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH电源：3.3 V
认证状态：Not Qualified筛选级别：AEC-Q100
座面最大高度：1.1 mm子类别：Other Analog ICs
最大供电电流 (Isup)：0.95 mA最大供电电压 (Vsup)：3.6 V
最小供电电压 (Vsup)：3 V标称供电电压 (Vsup)：3.3 V
表面贴装：YES温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
总剂量：9-Sep-19 V宽度：3 mm

FDC1004QDGSTQ1 数据手册

 浏览型号FDC1004QDGSTQ1的Datasheet PDF文件第6页浏览型号FDC1004QDGSTQ1的Datasheet PDF文件第7页浏览型号FDC1004QDGSTQ1的Datasheet PDF文件第8页浏览型号FDC1004QDGSTQ1的Datasheet PDF文件第10页浏览型号FDC1004QDGSTQ1的Datasheet PDF文件第11页浏览型号FDC1004QDGSTQ1的Datasheet PDF文件第12页 
FDC1004Q  
www.ti.com.cn  
ZHCSDR2 –APRIL 2015  
8 Detailed Description  
8.1 Overview  
The FDC1004Q is a high-resolution, 4-channel capacitance-to-digital converter for implementing capacitive  
sensing solutions. Each channel has a full scale range of ±15 pF and can handle a sensor offset capacitance of  
up to 100 pF, which can be either programmed internally or can be an external capacitor for tracking  
environmental changes over time and temperature. The large offset capacitance capability allows for the use of  
remote sensors. The FDC1004Q also includes shield drivers for sensor shields, which can reduce EMI  
interference and help focus the sensing direction of a capacitive sensor. The small footprint of the FDC1004Q  
allows for use in space-constrained applications. For more information on the basics of capacitive sensing and  
applications, refer to FDC1004: Basics of Capacitive Sensing and Applications application note (SNOA927).  
8.2 Functional Block Diagram  
CIN1  
CIN2  
VDD  
FDC1004Q  
M
U
X
CHA  
SHLD1  
SHLD2  
Capacitance to  
Digital Converter  
Offset and Gain  
Calibration  
SDA  
SCL  
Excitation  
I2C  
Configuration and Data Registers  
M
U
X
CHB  
CIN3  
CIN4  
CAPDAC  
GND  
8.3 Feature Description  
8.3.1 The Shield  
The FDC1004Q measures capacitance between CINn and ground. That means any capacitance to ground on  
signal path between the FDC1004Q CINn pins and sensor is included in the FDC1004Q conversion result.  
In some applications, the parasitic capacitance of the sensor connections can be larger than the capacitance of  
the sensor. If that parasitic capacitance is stable, it can be treated as a constant capacitive offset. However, the  
parasitic capacitance of the sensor connections can have significant variation due to environmental changes  
(such as mechanical movement, temperature shifts, humidity changes). These changes are seen as drift in the  
conversion result and may significantly compromise the system accuracy.  
To eliminate the CINn parasitic capacitance to ground, the FDC1004Q SHLDx signals can be used for shielding  
the connection between the sensor and CINn. The SHLDx output is the same signal waveform as the excitation  
of the CINn pin; the SHLDx is driven to the same voltage potential as the CINn pin. Therefore, there is no current  
between CINn and SHLDx pins, and any capacitance between these pins does not affect the CINn charge  
transfer. Ideally, the CINn to SHLD capacitance does not have any contribution to the FDC1004Q result.  
In differential measurements, SHLD1 is assigned to CHn and SHLD2 is assigned to CHm, where n < m. For  
instance in the measurement CIN1 – CIN2, where CHA = CIN1 and CHB = CIN2 (see Table 4), SHDL1 is  
assigned to CIN1 and SHDL2 is assigned to CIN2.  
Copyright © 2015, Texas Instruments Incorporated  
9
 
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