- 您现在的位置：买卖IC网 > PDF目录9488 > AD7147WPACPZ-500R7 (Analog Devices Inc)IC CAP-TO-DGTL CONV PROG 24LFCSP PDF资料下载
参数资料
| 型号： | AD7147WPACPZ-500R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 24/73页 |
| 文件大小： | 0K |
| 描述： | IC CAP-TO-DGTL CONV PROG 24LFCSP |
| 标准包装： | 500 |
| 系列： | CapTouch™ |
| 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，SPI? |
| 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： | 24-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 24-LFCSP-VQ（4x4） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页
Data Sheet
AD7147
Rev. D | Page 29 of 72
INTERRUPT OUTPUT
SENSOR-TOUCH INTERRUPT
The AD7147 has an interrupt output that triggers an interrupt
service routine on the host processor. The INT signal is on
Pin 17 and is an open-drain output. There are three types of
interrupt events on the AD7147: a CDC conversion-complete
interrupt, a sensor touch interrupt, and a GPIO interrupt. Each
interrupt has enable and status registers. The conversion-
complete and sensor-touch (sensor-activation) interrupts can be
enabled on a per-conversion-stage basis. The status registers
indicate what type of interrupt triggered the INT pin. Status
registers are cleared, and the INT signal is reset high during a
read operation. The signal returns high as soon as the read
address has been set up.
The sensor-touch interrupt mode is implemented when the host
processor requires an interrupt only when a sensor is contacted.
Configuring the AD7147 into this mode results in the interrupt
being asserted when the user makes contact with the sensor and
again when the user stops touching the sensor. The second
interrupt is required to alert the host processor that the user is
no longer contacting the sensor.
The registers located at Address 0x005 and Address 0x006 are
used to enable the interrupt output for each stage. The registers
located at Address 0x008 and Address 0x009 are used to read
back the interrupt status for each stage.
CDC CONVERSION-COMPLETE INTERRUPT
Figure 40 shows the interrupt output timing during contact with
one of the sensors connected to STAGE0 while operating in the
sensor-touch interrupt mode. For a low limit configuration, the
interrupt output is asserted as soon as the sensor is contacted and
again after the user has stopped contacting the sensor. (Note that
the interrupt output remains low until the host processor reads
back the interrupt status registers located at Address 0x008 and
Address 0x009.)
The AD7147 interrupt signal asserts low to indicate the completion
of a conversion stage and that new conversion result data is
available in the registers.
The interrupt can be independently enabled for each conversion
stage. Each conversion-stage-complete interrupt can be enabled via
the STAGEx_COMPLETE_INT_ENABLE register (Address 0x007).
This register has a bit that corresponds to each conversion stage.
Setting this bit to 1 enables the interrupt for that stage. Clearing this
bit to 0 disables the conversion-complete interrupt for that stage.
The interrupt output is asserted when there is a change in the
interrupt status bits. This can indicate that a user is touching the
sensor(s) for the first time, the number of sensors being touched
has changed, or the user is no longer touching the sensor(s).
Reading the status bits in the interrupt status register shows the
current sensor activations.
The AD7147 interrupt should be enabled only for the last stage
in a conversion sequence. For example, if there are five conver-
sion stages, only the conversion-complete interrupt for STAGE4
is enabled. Therefore, INT only asserts when all five conversion
stages are complete and the host can read new data from all five
result registers. The interrupt is cleared by reading the STAGEx_
COMPLETE_INT_STATUS register located at Address 0x00A.
4
2
CONVERSION
STAGE
SERIAL
READBACK
INT OUTPUT
3
1
STAGE1
STAGE0
FINGER ON SENSOR
FINGER OFF SENSOR
1USER TOUCHING SENSOR.
2ADDRESS 0x008 IS READ BACK TO CLEAR INTERRUPT.
3USER STOPS TOUCHING SENSOR.
4ADDRESS 0x008 IS READ BACK TO CLEAR INTERRUPT.
06663-
037
Register 0x00A is the conversion-complete interrupt status
register. Each bit in this register corresponds to a conversion
stage. If a bit is set, it means that the conversion-complete
interrupt for the corresponding stage was triggered. This
register is cleared upon a read if the underlying condition
that triggered the interrupt is not present.
Figure 40. Example of Sensor-Touch Interrupt
相关PDF资料 |
PDF描述 |
|---|---|
| MS17344R18N5S | CONN PLUG 3POS STRAIGHT W/SCKT |
| ICM7555ESA+ | IC OSC MONO TIMING 500KHZ 8-SOIC |
| LTC6905CS5-96#TRM | IC OSC SILICON 96MHZ TSOT23-5 |
| MC100EL1648DG | IC OSC VCO 1.1GHZ 8SOIC |
| AD7147AACBZ-500RL7 | IC CDC 13CH SPI W/RAM 25WLCSP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7147WPACPZ-RL | 功能描述:IC CAP-TO-DGTL CONV PROG 24LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:CapTouch™ 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 |
| AD7148 | 制造商:AD 制造商全称:Analog Devices 功能描述:Programmable Touch Controller for Single Electrode Capacitance Sensors |
| AD7148ACPZ-1500RL7 | 功能描述:IC CAP-TO-DGTL CONV PROG 16LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:- 标准包装:96 系列:- 类型:- 触摸面板接口:- 输入数/键:- 分辨率（位）:- 评估套件:* 数据接口:- 数据速率/采样率 (SPS，BPS):- 电压基准:- 电源电压:- 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| AD7148ACPZ-1REEL | 功能描述:IC CAP-TO-DGTL CONV PROG 16LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:- 标准包装:96 系列:- 类型:- 触摸面板接口:- 输入数/键:- 分辨率（位）:- 评估套件:* 数据接口:- 数据速率/采样率 (SPS，BPS):- 电压基准:- 电源电压:- 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| AD7150 | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultra Low Power, 2 Channel, Capacitance Converter for Proximity Sensing |
发布紧急采购，3分钟左右您将得到回复。