CapTouch⑩可编程控制器,用于单电极电容式传感器 CapTouch⑩ Programmable Controller for Single-Electrode Capacitance Sensors
Product Details
The AD7147 CapTouch™ controller is designed for use with capacitance sensors implementing functions such as buttons, scroll bars, and wheels. The sensors need only one PCB layer, enabling ultrathin applications.
The AD7147 is an integrated CDC with on-chip environmental calibration. The CDC has 13 inputs channeled through a switch matrix to a 16-bit, 250 kHz sigma-delta Σ-Δ converter. The CDC is capable of sensing changes in the capacitance of the external sensors and uses this information to register a sensor activation. By programming the registers, the user has full control over the CDC setup.
High resolution sensors require minor software to run on the host processor.
The AD7147 is designed for single electrode capacitance sensors grounded sensors. There is an active shield output to minimize noise pickup in the sensor.
The AD7147 has on-chip calibration logic to compensate for changes in the ambient environment. The calibration sequence is performed automatically and at continuous intervals as long as the sensors are not touched. This ensures that there are no false or nonregistering touches on the external sensors due to a changing environment.
The AD7147 has an SPI-compatible serial interface, and the AD7147-1 has an I2C®-compatible serial interface. Both parts have an interrupt output, as well as a GPIO. There is a VDRIVE pin to set the voltage level for the serial interface independent of VCC.
The AD7147 is available in a 24-lead, 4 mm × 4 mm LFCSP and operates from a 2.6 V to 3.6 V supply. The operating current con-sumption in low power mode is typically 26 μA for 13 sensors.
**Applications**
### Features and Benefits
Femtofarad resolution
13 capacitance sensor inputs
9 ms update rate, all 13 sensor inputs
No external RC components required
Automatic conversion sequencer
Automatic compensation for environmental changes
Automatic adaptive threshold and sensitivity levels
通道数 13
耗散功率 3.60 mW
采样率 250 ksps
分辨率Bits 16.0
工作温度Max 85 ℃
工作温度Min -40 ℃
电源电压 2.6V ~ 3.6V
安装方式 Surface Mount
引脚数 24
封装 LFCSP-24
高度 0.83 mm
封装 LFCSP-24
工作温度 -40℃ ~ 85℃
产品生命周期 Active
包装方式 Tape & Reel TR
制造应用 Life Sciences & Medical Instrumentation, Building Control and Automation, Scanning Equipment, White Goods and Vending, Healthcare, Security and Surveillance, Building Technology, Access Control
RoHS标准 RoHS Compliant
含铅标准 Lead Free
军工级 No
ECCN代码 EAR99
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
AD7147ACPZ-1REEL ADI 亚德诺 | 当前型号 | 当前型号 |
AD7147ACPZ-1500RL7 亚德诺 | 完全替代 | AD7147ACPZ-1REEL和AD7147ACPZ-1500RL7的区别 |
AD7147ACPZ-500RL7 亚德诺 | 完全替代 | AD7147ACPZ-1REEL和AD7147ACPZ-500RL7的区别 |
AD7147ACPZ-REEL 亚德诺 | 类似代替 | AD7147ACPZ-1REEL和AD7147ACPZ-REEL的区别 |