Overview
The PCF8885TS/1,118, produced by NXP USA Inc., is a capacitive 8-channel touch and proximity sensor. This integrated circuit utilizes a patented (EDISEN) method to detect changes in capacitance on remote sensing plates. It features continuous auto-calibration to compensate for static capacitance changes, ensuring reliable and accurate sensing. The sensor supports both direct and latching switch modes and is compatible with I2C Fast-mode Plus (Fm+) interface, making it versatile for various applications.
Key Specifications
| Parameter | Description |
|---|---|
| Package | 28-TSSOP (0.173, 4.40mm Width) Exposed Pad |
| Supply Voltage | 2.5 V to 5.5 V |
| Operating Temperature | -40°C to +85°C |
| Pin Count | 28 |
| Interface | I2C Fast-mode Plus (Fm+) |
| Power Consumption | Low-power battery operation (IDD ~ 10 μA), Sleep mode (IDD < 100 nA) |
| Remote Sensing | Sensing plates can be connected remotely using coaxial cable |
| Auto-Calibration | Continuous auto-calibration for static capacitance changes |
| Switch Modes | Direct and latching switch modes |
| Interrupt Output | Interrupt signaling over I2C-bus |
Key Features
- Dynamic touch and proximity sensor with 8 independent sensor channels
- Support for matrix arrangement of sensors
- Adjustable response time and sensitivity
- Continuous auto-calibration and digital processing method
- Can cope with up to 6 mm of acrylic glass
- I2C Fast-mode Plus (Fm+) compatible interface with two I2C-bus addresses
- Cascading of two ICs possible
- Interrupt output and signaling over I2C-bus
- Low-power battery operation and sleep mode
Applications
- Replacing mechanical switches
- Hermetically sealed keys on a keyboard
- Switches for medical applications and explosive environments
- Audio control: on/off, channel, volume
- Sliders and wheel-switches
- Vandal proof switches
- Switches in or under upholstery, leather, handles, mats, carpets, tiles, and glass
- Home automation switches
- Use of standard metal sanitary parts as switches (e.g., a tap)
- Portable communication and entertainment units
- White goods control panels
Q & A
- What is the PCF8885TS/1,118 used for?
The PCF8885TS/1,118 is a capacitive 8-channel touch and proximity sensor used in various applications such as replacing mechanical switches, audio control, and home automation.
- What is the operating voltage range of the PCF8885TS/1,118?
The operating voltage range is from 2.5 V to 5.5 V.
- What is the operating temperature range of the PCF8885TS/1,118?
The operating temperature range is from -40°C to +85°C.
- Does the PCF8885TS/1,118 support remote sensing?
- What interface does the PCF8885TS/1,118 use?
The PCF8885TS/1,118 uses an I2C Fast-mode Plus (Fm+) interface.
- Can the PCF8885TS/1,118 be used in low-power applications?
- What are the switch modes supported by the PCF8885TS/1,118?
The PCF8885TS/1,118 supports both direct and latching switch modes.
- Can multiple PCF8885TS/1,118 ICs be cascaded?
- How does the PCF8885TS/1,118 handle changes in capacitance?
The PCF8885TS/1,118 uses continuous auto-calibration to compensate for static capacitance changes.
- What types of materials can the PCF8885TS/1,118 sense through?
The PCF8885TS/1,118 can sense through materials such as acrylic glass up to 6 mm thick.
