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| 型号： | AD7142ACPZ-1REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 19/73页 |
| 文件大小： | 0K |
| 描述： | IC CAP-TO-DGTL CONV PROG 32LFCSP |
| 标准包装： | 1 |
| 类型： | 电容数字转换器 |
| 分辨率（位）： | 16 b |
| 采样率（每秒）： | 250k |
| 数据接口： | 串行 |
| 电压电源： | 单电源 |
| 电源电压： | 2.6 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 32-LFCSP-VQ |
| 包装： | 标准包装 |
| 产品目录页面： | 781 (CN2011-ZH PDF) |
| 其它名称： | AD7142ACPZ-1REELDKR |
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AD7142
Rev. A | Page 25 of 72
Σ-Δ
16-BIT
CDC
16
STAGE_MAX_WORD0
STAGE_MAX_WORD1
STAGE_MAX_WORD2
STAGE_MAX_WORD3
STAGE_MIN_WORD0
STAGE_MIN_WORD1
STAGE_MIN_WORD2
STAGE_MIN_WORD3
STAGE_MAX_AVG
BANK 3 REGISTERS
STAGE_HIGH_THRESHOLD
BANK 3 REGISTERS
STAGE_MAX_TEMP
BANK 3 REGISTERS
MAX LEVEL
DETECTION
LOGIC
STAGE_MIN_AVG
BANK 3 REGISTER3
STAGE_LOW_THRESHOLD
BANK 3 REGISTERS
STAGE_MIN_TEMP
BANK 3 REGISTERS
BANK 3
REGISTERS
BANK 3
REGISTERS
05
70
2-
06
2
MIN LEVEL
DETECTION
LOGIC
Figure 37. Tracking the Minimum and Maximum Average Sensor Values
Table 13. Additional Information about Environmental Calibration and Adaptive Threshold Registers
Register
Location
Description
NEG_THRESHOLD_SENSITIVITY
Bank 2
Used in Equation 2. This value is programmed once at start up.
NEG_PEAK_DETECT
Bank 2
Used by internal adaptive threshold logic only.
The NEG_PEAK_DETECT is set to a percentage of the difference between the ambient
CDC value, and the min average CDC value. If the output of the CDC gets within the
NEG_PEAK_DETECT percentage of the min average, only then is the min average value
updated.
POS_THRESHOLD_SENSITIVITY
Bank 2
Used in Equation 1. This value is programmed once at start up.
POS_PEAK_DETECT
Bank 2
Used by internal adaptive threshold logic only.
The POS_PEAK_DETECT is set to a percentage of the difference between the ambient
CDC value, and the max average CDC value. If the output of the CDC gets within the
POS_PEAK_DETECT percentage of the min average, only then is the max average value
updated.
STAGE_OFFSET_LOW
Bank 2
Used in Equation 2. An initial value (based on sensor characterization) is programmed
into this register at start up. The AD7142 on chip calibration algorithm automatically
updates this register based on the amount of sensor drift due to changing ambient
conditions. Set to 80% of the STAGE_OFFSET_LOW_CLAMP value.
STAGE_OFFSET_HIGH
Bank 2
Used in Equation 1. An initial value (based on sensor characterization) is programmed
into this register at start up. The AD7142 on chip calibration algorithm automatically
updates this register based on the amount of sensor drift due to changing ambient
conditions. Set to 80% of the STAGE_OFFSET_HIGH_CLAMP value.
STAGE_OFFSET_HIGH_CLAMP
Bank 2
Used by internal environmental calibration and adaptive threshold algorithms only.
An initial value (based on sensor characterization) is programmed into this register at
start up. The value in this register prevents a user from causing a sensor’s output value
to exceed the expected nominal value.
Set to the maximum expected sensor response, maximum change in CDC output code .
STAGE_OFFSET_LOW_CLAMP
Bank 2
Used by internal environmental calibration and adaptive threshold algorithms only.
An initial value (based on sensor characterization) is programmed into this register at
start up. The value in this register prevents a user from causing a sensor’s output value
to exceed the expected nominal value.
Set to the minimum expected sensor response, minimum change in CDC output code .
STAGE_SF_AMBIENT
Bank 3
Used in Equation 1 and Equation 2. This is the ambient sensor output, when the sensor
is not touched, as calculated using the slow FIFO.
STAGE_HIGH_THRESHOLD
Bank 3
Equation 1 value.
STAGE_LOW_THRESHOLD
Bank 3
Equation 2 value.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7142ACPZ-1REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Programmable Controller for Capacitance Touch Sensors |
| AD7142ACPZ-500RL7 | 功能描述:IC CAP-TO-DGTL CONV PROG 32LFCSP 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 |
| AD7142ACPZ-500RL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Programmable Controller for Capacitance Touch Sensors |
| AD7142ACPZ-REEL | 功能描述:IC CAP-TO-DGTL CONV PROG 32LFCSP 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 |
| AD7142ACPZ-REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Programmable Controller for Capacitance Touch Sensors |
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