参数资料
| 型号： | AD7152BRMZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/24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 20 of 24
DIFFERENTIAL CAPACITIVE INPUT
When configured for differential mode (the CAPDIFF bit in the
Channel 1 Setup or Channel 2 Setup registers is set to 1), the
CDC measures the difference between positive and negative
capacitance input.
Each of the two input capacitances, CX and CY, between the
EXC and CIN pins must be less than 2 pF (without using the
CAPDACs) or must be less than 9 pF and balanced by the
CAPDACs. Balancing by the CAPDACs means that both
CX CAPDAC(+) and CY CAPDAC() are less than 2 pF.
If the unbalanced capacitance between the EXC and CIN pins
is higher than 2 pF, the CDC introduces a gain error, an offset
0x0000 ... 0xFFF0
DATA
CAPDIFF = 1
±2pF
CDC
EXC
CIN(+)
CIN(–)
CX
0pF TO 4pF
CY
0pF TO 4pF
CAPDAC(+)
OFF
CAPDAC(–)
OFF
07
45
0-
0
20
Figure 32. CDC Differential Input Mode
0x0000 ... 0xFFF0
DATA
CAPDIFF = 1
±2pF
CDC
EXC
CIN(+)
CIN(–)
CX
4pF TO 6pF
(5 ± 1pF)
CY
4pF TO 6pF
(5 ± 1pF)
CAPDAC(+)
5pF
CAPDAC(–)
5pF
07
45
0-
0
21
Figure 33. Using CAPDAC in Differential Mode
0x0000 ... 0xFFF0
DATA
CAPDIFF = 1
±2pF
CDC
EXC
CIN(+)
CIN(–)
CX
3pF TO 7pF
(5 ± 2pF)
CY
5pF
CAPDAC(+)
5pF
CAPDAC(–)
5pF
07
45
0-
1
21
Figure 34. Using CAPDAC in Differential Mode
PARASITIC CAPACITANCE TO GROUND
DATA
CDC
EXC
CGND1
CIN
CGND2
CX
07
45
0-
0
1
2
Figure 35. Parasitic Capacitance to Ground
The CDC architecture used in the AD7152/AD7153 measures
CX connected between the EXC pin and the CIN pin. In theory,
any capacitance, CGND, to ground should not affect the CDC
result (see Figure 35).
The practical implementation of the circuitry in the chip
implies certain limits and the result is gradually affected by
capacitance to ground. See the allowed capacitance to GND
PARASITIC RESISTANCE TO GROUND
DATA
CDC
EXC
RGND1
CIN
RGND2
CX
07
45
0-
0
13
Figure 36. Parasitic Resistance to Ground
The CDC result can be affected by a leakage current from
the CX to ground; therefore, the CX should be isolated from
the ground. The influence of the leakage current varies with
the power supply voltage (see Figure 36).
A higher leakage current to ground results in a gain error,
an offset error, and a nonlinearity error (see Figure 13 and
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相关代理商/技术参数 |
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| 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 |
| AD7153BRMZ-REEL | 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 |
| AD7156 | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultralow Power, 1.8 V, 3 mm × 3 mm, 2-Channel Capacitance Converter |
| AD7156BCPZ-REEL | 功能描述:IC CDC 2CH 12BIT 1.8V 10-LFCSP 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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