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| 型号： | AD7151BRMZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/28页 |
| 文件大小： | 0K |
| 描述： | IC CAP CONV 1CH ULT LP 10MSOP |
| 标准包装： | 3,000 |
| 类型： | 电容数字转换器 |
| 输入类型： | 电压 |
| 输出类型： | 数字 |
| 接口： | 2 线串口 |
| 电流 - 电源： | 120µA |
| 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) |
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AD7151
Rev. 0 | Page 24 of 28
PARASITIC SERIAL RESISTANCE
DATA
CDC
EXC
RS1
CIN
RS2
CX
07
08
6-
0
34
Figure 45. Parasitic Serial Resistance
The AD7151 CDC result is affected by a resistance in series
with the measured capacitance. The total serial resistance (RS1 +
See Figure 12.
INPUT OVERVOLTAGE PROTECTION
EXC
GND
CDC
RS1
CIN
RS2
CX
07
08
6-
03
5
Figure 46. AD7151 CIN Overvoltage Protection
The AD7151 capacitive input has an internal ESD protection.
However, some applications may require an additional
overvoltage protection, depending on the application-specific
requirements. Any additional circuit in the capacitive front end
must be carefully designed, especially with respect to the limits
recommended for maximum capacitance to ground, maximum
serial resistance, maximum leakage, and so on.
INPUT EMC PROTECTION
EXC
CDC
CIN
CX
10k
82k
39k
47pF
22pF
68pF
GND
07
08
6-
0
36
Figure 47. AD7151 CIN EMC Protection
Some applications may require an additional input filter for
improving electromagnetic compatibility (EMC). Any input
filter must be carefully designed, considering the balance between
the system capacitance performance and system electromagnetic
immunity.
Figure 47 shows one of the possible input circuit configurations
significantly improving the system immunity against high
frequency noise and slightly affecting the AD7151 performance
in terms of additional gain and offset error.
POWER SUPPLY DECOUPLING AND FILTERING
CDC
GND
SDA
SCL
0.1F
10F
1k
VDD
1k
07
08
6-
05
8
Figure 48. AD7151 VDD Decoupling and Filtering
The AD7151 has good dc and low frequency power supply
rejection but may be sensitive to higher frequency ripple and
noise, specifically around the excitation frequency and its
harmonics. Figure 48 shows a possible circuit configuration for
improving the system immunity against ripple and noise
coupled to the AD7151 via the power supply.
If the serial interface is connected to the other circuits in the
system, it is better to connect the pull-up resistors on the other
side of the VDD filter than connect to the AD7151. If the
AD7151 is used in standalone mode and the serial interface is
not used, it is better to connect the pull-up resistors directly to
the AD7151 VDD.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7152 | 制造商:AD 制造商全称:Analog Devices 功能描述:12-Bit Capacitance-to-Digital Converter |
| AD7152BRMZ | 功能描述:IC CDC 12BIT 2/4CH 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Data Converter Basics 标准包装:1 系列:- 类型:电机控制 分辨率（位）:12 b 采样率（每秒）:1M 数据接口:串行，并联 电压电源:单电源 电源电压:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:100-TQFP 供应商设备封装:100-TQFP（14x14） 包装:剪切带 (CT) 其它名称:296-18373-1 |
| AD7152BRMZ-REEL | 功能描述:IC CDC 12BIT 2/4CH 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| AD7153 | 制造商:AD 制造商全称:Analog Devices 功能描述:12-Bit Capacitance-to-Digital Converter |
| AD7153BRMZ | 功能描述:IC CDC 12BIT 1/2CH 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
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