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參數資料
| 型號： | AD7147ACPZ-500RL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 28/73頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CAP-TO-DGTL CONV PROG 24LFCSP |
| 標準包裝： | 1 |
| 系列： | CapTouch™ |
| 類型： | 電容數字轉換器 |
| 分辨率（位）： | 16 b |
| 采樣率（每秒）： | 250k |
| 數據接口： | 串行，SPI? |
| 電壓電源： | 單電源 |
| 電源電壓： | 2.6 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-VFQFN 裸露焊盤，CSP |
| 供應商設備封裝： | 24-LFCSP-VQ（4x4） |
| 包裝： | 標準包裝 |
| 產品目錄頁面： | 781 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7147EBZ-ND - BOARD EVAL FOR AD7147ACPZ EVAL-AD7147-1EBZ-ND - BOARD EVAL FOR AD7147ACPZ-1 |
| 其它名稱： | AD7147ACPZ-500RL7DKR |
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Data Sheet
AD7147
Rev. D | Page 33 of 72
OUTPUTS
ACSHIELD OUTPUT
The AD7147 measures capacitance between CINx and ground.
Any capacitance to ground on the signal path between the CINx
pins and the sensor is included in the AD7147 conversion result.
To eliminate stray capacitance to ground, the ACSHIELD signal should
be used to shield the connection between the sensor and CINx,
as shown in Figure 47. The plane around the sensors should also
be connected to ACSHIELD.
CIN0
CIN1
CIN2
CIN3
ACSHIELD
AD7147
SE
N
SO
R
PC
B
GND
06
66
3-
0
44
Figure 47. ACSHIELD
The ACSHIELD output is the same signal waveform as the
excitation signal on CINx. Therefore, there is no ac current
between CINx and ACSHIELD, and any capacitance between these
pins does not affect the CINx charge transfer.
Using ACSHIELD eliminates capacitance-to-ground pickup, which
means that the AD7147 can be placed up to 10 cm away from
the sensors. This allows the AD7147 to be placed on a separate
PCB than that of the sensors if the connections between the
sensors and the CINx inputs are correctly shielded using
ACSHIELD.
GENERAL-PURPOSE INPUT/OUTPUT (GPIO)
The AD7147 has one GPIO pin. It can be configured as an input or
an output. The GPIO_SETUP Bits[13:12] in the interrupt enable
register determine how the GPIO pin is configured.
Table 16. GPIO_SETUP Bits
GPIO_SETUP
GPIO Configuration
00
GPIO disabled
01
Input
10
Output low
11
Output high
When the GPIO is configured as an output, the voltage level on
the pin is set to either a low level or a high level, as defined by
the GPIO_SETUP bits (see Table 16).
The GPIO_INPUT_CONFIG bits in the interrupt enable
register determine the response of the AD7147 to a signal on
the GPIO pin when the GPIO is configured as an input. The
GPIO can be configured as either active high or active low, as
well as either edge triggered or level triggered (see Table 17).
Table 17. GPIO_INPUT_CONFIG Bits
GPIO_INPUT_CONFIG
GPIO Configuration
00
Triggered on negative level (active low)
01
Triggered on positive edge (active high)
10
Triggered on negative edge (active low)
11
Triggered on positive level (active high)
When GPIO is configured as an input, it triggers the interrupt
output on the AD7147. Table 15 lists the interrupt output
behavior for each of the GPIO configuration setups.
USING THE GPIO TO TURN ON/OFF AN LED
The GPIO on the AD7147 can be used to turn on and off an
LED by setting the GPIO as either output high or low. Setting
the GPIO output high turns on the LED; setting the GPIO
output low turns off the LED. The GPIO pin connects to a
transistor that provides the drive current for the LED. Suitable
transistors include the KTC3875 from Korea Electronics Co.,
Ltd. (KEC).
AD7147
GPIO
VCC
KTC3875
OR SIMILAR
06
66
3-
04
5
Figure 48. Controlling an LED Using the GPIO
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相關代理商/技術參數 |
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| AD7147ACPZ-REEL | 功能描述:IC CAP-TO-DGTL CONV PROG 24LFCSP RoHS:是 類別:集成電路 (IC) >> 數據采集 - ADCs/DAC - 專用型 系列:CapTouch™ 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數據采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數據接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7147EBZ | 制造商:Analog Devices 功能描述:CAPACITANCE TO DIGITAL CONVERTER - Bulk |
| AD7147P-1WAFER | 功能描述:IC CAP-TO-DGTL CONV PROG WAFER 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1 |
| AD7147PACPZ-1500R7 | 功能描述:IC CAP-TO-DGTL CONV PROG 24LFCSP RoHS:是 類別:集成電路 (IC) >> 數據采集 - ADCs/DAC - 專用型 系列:CapTouch™ 產品培訓模塊:Data Converter Basics 標準包裝:1 系列:- 類型:電機控制 分辨率（位）:12 b 采樣率（每秒）:1M 數據接口:串行，并聯 電壓電源:單電源 電源電壓:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:100-TQFP 供應商設備封裝:100-TQFP（14x14） 包裝:剪切帶 (CT) 其它名稱:296-18373-1 |
| AD7147PACPZ-1RL | 功能描述:IC CAP-TO-DGTL CONV PROG 24LFCSP RoHS:是 類別:集成電路 (IC) >> 數據采集 - ADCs/DAC - 專用型 系列:CapTouch™ 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數據采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數據接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
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