Overview
The AD7148ACPZ-1500RL7 from Analog Devices Inc. is a CapTouch Programmable Controller designed for use with capacitance sensors. This integrated circuit is optimized for implementing various touch-sensitive functions such as buttons, scroll bars, and wheels. It leverages advanced capacitance-to-digital conversion technology to provide high accuracy and reliability in touch sensing applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | 2.6 | 3.3 | 3.6 | V | Single supply operation |
| Operating Temperature | -40 | 85 | °C | Active temperature range | |
| Resolution | 16 bits | High accuracy sensing | |||
| Update Rate | 9 ms | ms | For all sensor inputs | ||
| Number of Sensor Inputs | 13 | Multiple touch button design | |||
| Interface | I2C, SPI | For easy communication | |||
| Power Consumption (Full Power Mode) | 1 mA | mA | VCC + VDRIVE | ||
| Power Consumption (Low Power Mode) | 21.5 μA | μA | Converter idle, decimation = 256 |
Key Features
- CapTouch™ Technology: Advanced capacitance-to-digital conversion for reliable touch sensing.
- High Resolution: 16-bit resolution for high accuracy sensing.
- Multiple Sensor Inputs: 13 input channels for complex touch button designs.
- Flexible Interface: Supports both I2C and SPI interfaces for broad microcontroller connectivity.
- Low Power Consumption: Ideal for portable devices with low operating current in full and low power modes.
- Robust Design: Tolerates wet or dirty environments and complies with rigorous safety standards.
- Automatic Calibration: On-chip automatic calibration logic to compensate for environmental changes.
- Active Shield Output: Minimizes noise pickup in the sensor.
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.
- Healthcare Equipment: Touch-sensitive controls in medical devices.
Q & A
- What is the AD7148ACPZ-1500RL7 used for?
The AD7148ACPZ-1500RL7 is used for implementing touch-sensitive functions such as buttons, scroll bars, and wheels using capacitance sensors.
- What is the resolution of the AD7148?
The resolution of the AD7148 is 16 bits, providing high accuracy in touch sensing.
- How many sensor inputs does the AD7148 support?
The AD7148 supports 13 sensor inputs, allowing for complex touch button designs.
- What interfaces does the AD7148 support?
The AD7148 supports both I2C and SPI interfaces for communication.
- What is the operating temperature range of the AD7148?
The operating temperature range of the AD7148 is from -40°C to 85°C.
- How does the AD7148 handle environmental changes?
The AD7148 features on-chip automatic calibration logic to compensate for environmental changes.
- What is the power consumption of the AD7148 in full power mode?
The power consumption of the AD7148 in full power mode is typically 1 mA.
- Is the AD7148 suitable for portable devices?
Yes, the AD7148 is suitable for portable devices due to its low power consumption.
- Does the AD7148 have any noise minimization features?
Yes, the AD7148 has an active shield output to minimize noise pickup in the sensor.
- What are some common applications of the AD7148?
Common applications include consumer electronics touch screens, industrial control panels, portable device user interfaces, and healthcare equipment.
