Overview
The AD7147ACPZ-1REEL, produced by Analog Devices Inc., is a 16-bit, 13-channel capacitance-to-digital converter (CDC) designed for various capacitive sensing applications. This component is particularly suited for capacitive touch user interfaces, proximity detection, and other capacitive sensing needs. It features high resolution and sensitivity, making it ideal for accurate capacitive sensing in a variety of environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 bits | |
| Number of Channels | 13 | |
| Sampling Rate | Up to 250 kSPS | |
| Full-Scale Range | Up to 60 pF | |
| Supply Voltage | 2.6 V to 3.6 V | |
| Operating Temperature | -40°C to 85°C | |
| Package Type | 24-Lead LFCSP (4x4 mm) | |
| Serial Interface | SPI-compatible (AD7147), I2C-compatible (AD7147-1) | |
| Power Consumption (Full Power Mode) | Typically 1 mA | |
| Power Consumption (Low Power Mode) | Typically 26 μA for 13 sensors |
Key Features
- High resolution and sensitivity for accurate capacitive sensing
- 13 independent input channels
- Supports single-supply operation from 2.6 V to 3.6 V
- Low power consumption, suitable for battery-powered applications
- Integrated temperature sensor for environmental compensation
- Internal oscillator and automatic conversion sequencer
- On-chip automatic calibration logic and adaptive threshold and sensitivity levels
- SPI-compatible (AD7147) and I2C-compatible (AD7147-1) serial interfaces
- Interrupt output and general-purpose input/output (GPIO)
- Active shield output to minimize noise pickup in the sensor
Applications
- Capacitive touch user interfaces
- Proximity detection
- Other capacitive sensing applications
- Automotive applications
Q & A
- What is the resolution of the AD7147?
The AD7147 has a resolution of 16 bits. - How many input channels does the AD7147 support?
The AD7147 supports 13 independent input channels. - What is the sampling rate of the AD7147?
The sampling rate of the AD7147 is up to 250 kSPS. - What is the full-scale range of the AD7147?
The full-scale range of the AD7147 is up to 60 pF. - What is the operating voltage range of the AD7147?
The AD7147 operates from a supply voltage of 2.6 V to 3.6 V. - What are the key power consumption modes of the AD7147?
The AD7147 has a full power mode consuming typically 1 mA and a low power mode consuming typically 26 μA for 13 sensors. - Does the AD7147 have an integrated temperature sensor?
Yes, the AD7147 includes an integrated temperature sensor for environmental compensation. - What types of serial interfaces does the AD7147 support?
The AD7147 supports SPI-compatible and I2C-compatible serial interfaces. - Is the AD7147 RoHS compliant?
Yes, the AD7147 is RoHS3 compliant. - What is the package type of the AD7147?
The AD7147 is available in a 24-lead, 4 mm x 4 mm LFCSP package.
