参数资料
型号: AD7152BRMZ-REEL
厂商: Analog Devices Inc
文件页数: 15/24页
文件大小: 0K
描述: IC CDC 12BIT 2/4CH 10MSOP
标准包装: 3,000
类型: 电容数字转换器
分辨率(位): 12 b
数据接口: 串行
电压电源: 单电源
电源电压: 2.7 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 带卷 (TR)
配用: EVAL-AD7152EBZ-ND - BOARD EVAL AD7152
AD7152/AD7153
Rev. 0 | Page 22 of 24
The offset register of the AD7152/AD7153 allows for offset
calibration over the full capacitive input range. However, the
user must ensure that the offset to be removed is within 40% of
the full scale range; this can be achieved by using the CAPCAC
to perform a coarse offset calibration and use the system offset
calibration then to compensate for an offset within the 40% of
full-scale range pF of the CAPDAC.
The offset calibration register is reloaded by the default value
0x8000 at power-on or after reset. Therefore, if the offset
calibration is not repeated after each system power-up, the
calibration coefficient value should be stored by the host
controller and reloaded as part of the AD7152/AD7153 setup.
Note that the AD7152/AD7153 zero scale for differential mode
is around 0x8000; therefore, the offset register also needs a
value of around 0x8000, where the zero scale in single-ended
mode is 0x0000, with a required offset register value of 0x3000.
For more detailed information, see the Data Registers section.
TYPICAL APPLICATION DIAGRAM
SCL
VDD
GND
AD7153
SDA
3.3V
VSUPPLY
1k
0.1F
10F
1F
CIN1(+)
CSENS1
CSENS2
CIN1(–)
EXC1
C1
R1
C2
R2
C3
R3
C4
R4
47pF
10k
ADP1720-3.3
HOST
SYSTEM
GND
07
45
0
-06
1
Figure 41. Basic Application Diagram for a Differential Capacitive Sensor
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