Overview
The AD7147PACPZ-1RL, produced by Analog Devices Inc., is a high-performance capacitance-to-digital converter (CDC) designed for touch sensing applications. This component is particularly suited for single electrode capacitance sensors and features advanced CapTouch™ technology. It operates with a 16-bit resolution and supports up to 13 input channels, making it versatile for multiple touch button designs. The AD7147PACPZ-1RL is known for its high accuracy sensing, robust design, and low power consumption, making it ideal for a variety of applications including consumer electronics, industrial control panels, and portable devices.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | 2.6 | 3.3 | 3.6 | V | |
| Serial Interface Voltage (VDRIVE) | 1.65 | 3.6 | V | ||
| Operating Temperature | -40 | 85 | °C | ||
| Resolution | 16 Bits | Guaranteed by design, but not production tested | |||
| Update Rate | 8.73 | 9 | 9.27 | ms | 12 conversion stages, decimation = 64 |
| Sampling Frequency | 250 kHz | ||||
| Current Consumption (Full Power Mode) | 0.9 | 1 | mA | ||
| Current Consumption (Low Power Mode) | 15.5 | 21.5 | μA | Converter idle, decimation = 256 |
Key Features
- CapTouch™ Technology: Advanced touch sensing technology for reliable and accurate touch detection.
- Multiple Input Channels: Supports up to 13 capacitance sensor inputs, allowing for complex input designs.
- High Resolution: 16-bit resolution for high accuracy sensing.
- Fast Sampling Rate: 250 kHz sampling frequency for responsive touch detection.
- Low Power Consumption: Low operating current, typically 26 μA in low power mode, ideal for portable devices.
- Robust Design: Tolerates wet or dirty environments, making it suitable for industrial and harsh environments.
- Flexible Interface: Supports both I2C and SPI serial interfaces for broad microcontroller connectivity.
- Automatic Calibration: On-chip automatic calibration logic to compensate for environmental changes.
- Active Shield Output: Minimizes noise pickup in the sensor.
- Interrupt and GPIO: Interrupt output and general-purpose input/output (GPIO) for additional functionality.
Applications
- Consumer Electronics: Touch screens and user interfaces in consumer devices.
- Industrial Control Panels: Touch-sensitive controls in industrial settings.
- Portable Devices: User interfaces in portable electronics such as smartphones and tablets.
- Healthcare Equipment: Touch-sensitive controls in medical devices.
Q & A
- What is the AD7147PACPZ-1RL used for?
The AD7147PACPZ-1RL is a capacitance-to-digital converter used for touch sensing applications in various devices.
- What is the resolution of the AD7147PACPZ-1RL?
The AD7147PACPZ-1RL has a 16-bit resolution for high accuracy sensing.
- How many input channels does the AD7147PACPZ-1RL support?
The AD7147PACPZ-1RL supports up to 13 capacitance sensor inputs.
- What are the operating temperature ranges for the AD7147PACPZ-1RL?
The operating temperature range is from -40°C to +85°C.
- What serial interfaces does the AD7147PACPZ-1RL support?
The AD7147PACPZ-1RL supports both I2C and SPI serial interfaces.
- How does the AD7147PACPZ-1RL handle environmental changes?
The AD7147PACPZ-1RL has on-chip automatic calibration logic to compensate for changes in the ambient environment.
- What is the typical current consumption in low power mode?
The typical current consumption in low power mode is 26 μA for 13 sensors.
- Is the AD7147PACPZ-1RL suitable for industrial environments?
Yes, it is designed to tolerate wet or dirty environments, making it suitable for industrial and harsh environments.
- Does the AD7147PACPZ-1RL have an active shield output?
Yes, it has an active shield output to minimize noise pickup in the sensor.
- What is the sampling frequency of the AD7147PACPZ-1RL?
The sampling frequency is 250 kHz.
