Azoteq ProxSense® Proximity & Touch Sensing Controllers
Azoteq IQS127D / IQS128 ProxSense™
Capacitive Proximity / Touch ControllersThe Azoteq IQS127D and IQS128 are high-performance IQ Switch® - ProxSense™ Single-Channel Capacitive Proximity/Touch Controllers. Azoteq IQS127D ProxSense features dual touch and proximity outputs and Automatic Antenna Tuning Implementation (ATI) for automatic adjustment for optimal performance. The IQS128 features Dynamic Calibration (DYCAL™) technology, providing intelligent hysteresis to allow for sensor drift even during sensor activation. Azoteq IQS127D and IQS128 single-channel capacitive proximity/touch controllers feature Internal Capacitor Implementation (ICI) reference capacitor on-chip. The IQS127D is designed for use in LCD, Plasma, and LED TVs, GSM cell phones (on ear detection / touch keys), LED flashlights or head lamps, and more. The IQS128 is optimized for 3-D glasses, occupancy sensors, personal media players, and more.
IQS127D Features
- Dual outputs (Touch and Proximity outputs)
- Automatic Antenna Tuning Implementation (ATI) - Automatic adjustment for optimal performance.
- Internal Capacitor Implementation (ICI) - reference capacitor on-chip
- Supply voltage: 2V to 5.5V
- Minimum external components
- Data streaming option
- Advanced on-chip digital signal processing
- User selectable (OTP):
- 4 Power Modes (15uA min)
- IO sink / source
- Time-out for stuck key
- Output mode (Direct / Latch / Toggle)
- Proximity and Touch Button sensitivity
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IQS127D Applications
- LCD, Plasma & LED TVs
- GSM cellular telephones - On ear detection / touch keys
- LED flashlights or headlamps
- White goods and appliances
- Office equipment, toys, sanitary ware
- Flame proof, hazardous environment Human Interface Devices
- Proximity detection that enables backlighting activation
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IQS128 Features
- DYCAL™ : Intelligent Hysteresis
- Internal Capacitor Implementation (ICI) - reference capacitor on-chip
- Automatic Antenna Tuning Implementation (Auto-ATI) - Automatic adjustment for optimal sensor performance
- Supply voltage: 2.95V to 5.5V
- Minimum external components
- 1-Wire open drain data streaming option
- Advanced on-chip digital signal processing
- User selectable (OTP):
- External synchronisation control or
- External control over filter operation
- I/O Sink or Source selection Time-out for stuck key Proximity and Touch sensitivity selections
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IQS128 Applications
- Occupancy sensors
- SAR qualification for Tablet PCs
- On-ear detection for mobile phones
- 3D glasses
- Personal Media Players
- White goods and appliances
- Human Interface Devices
- Proximity activated backlighting
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IQS127D Schematic
IQS128 Schematic
Azoteq IQS133 IQ Switch® - ProxSense™
3-Channel Capacitive SensorsAzoteq IQS133 IQ Switch® - ProxSense™ 3-Channel Capacitive Sensors are fully integrated 3-channel capacitive contact and proximity sensors with market-leading sensitivity and automatic tuning of the sense antenna. Azoteq IQS133 ProxSense 3-Channel Capacitive Sensors provide a minimalist implementation requiring as few as two external components. The Azoteq IQS133 features sub 4µA current consumption and is ideal for use in a variety of applications, including white goods/appliances, remote controls, office equipment, and more.
Features
- Sub 4uA current consumption
- Automatic tuning for optimal operation in various environments & compensation against sensitivity reducing objects
- 3 Channel input device
- Differentiated Touch & Proximity Output
- ATI: Automatic tuning to optimum sensitivity
- Supply Voltage 3V to 5V
- Internal voltage regulator and reference capacitor
- OTP options
- Direct (logic level) and serial data output
- Low Power Modes (sub 4μA min)
- Proximity & Touch Thresholds
- Automatic drift compensation
- Small outline MSOP-10
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Applications
- White goods and appliances
- Remote Controls
- Office equipment, toys, sanitary ware
- Flame proof, hazardous environment Human Interface Devices
- Proximity detection that enables backlighting activation (Patented)
- Wake-up from standby applications
- Replacement for electromechanical switches
- GUI trigger on proximity detection
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Schematic
Pin-outs
Azoteq IQS222 IQ Switch® - ProxSense®
Wheel/Slider ControllersAzoteq IQS222 IQ Switch® - ProxSense® Wheel/Slider and Touch Key Controllers with Proximity Detection offer industry-leading resolution (up to 11 bits) for a wheel/slider controller. Azoteq IQ222 ProxSense Wheel/Slider and Touchkey Controllers are 8-channel capacitive sensing devices, 3 of which can be used for a wheel/slider type interface. The IQS222 can operate as a controller for 8 keys or a wheel or slider and up to 5 keys. These Azoteq wheel/slider controllers are designed for use in a variety of applications, including personal navigation devices, personal media players, consumer electronics, white goods/appliances, keypads, and more.
Features
- Single device controls a wheel/slider (using 3 channels) and up to 5 keys, or up to 8 keys
- System cost reduction (lower BOM count)
- Class leading wheel/slider resolution with up to 11 bits
- Reliability through reducing system complexity
- Class leading proximity sensitivity - suitable for wake-up from sleep or launching a menu screen on a user approaching
- 2-wire serial interface bus, I²C compatible
- Noise immunity and detection
- 8 touch sensitivity settings per channel
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Applications
- Personal Navigation Devices
- Personal Media Players
- Consumer Electronics
- White goods and appliances
- Keypads
- Kiosk and POS Terminals
- E-Book Readers
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Application Circuit
Azoteq IQS316 IQ Switch® - ProxSense™
Capacitive Sensing ControllersAzoteq IQS316 IQ Switch® - ProxSense™ Multi-Channel Capacitive Sensing Controllers are 20-channel surface capacitive touch and proximity controllers with advanced on-chip signal processing features, including Antenna Tuning Implementation (ATI). Proximity detection can be distributed over all keys, or only selected keys, providing high flexibility for stable operation in varying designs. Azoteq IQS316 ProxSense Multi-Channel Capacitive Sensing Controllers are based on patented capacitive sensing technology that yields stability with high sensitivity and excellent noise immunity. The Azoteq IQS316 can operate with a small number of external components to provide a low-cost solution for medium to high channel count applications. These capacitive sensing controllers are ideal for use in a variety of applications, including office machines, digital cameras, keypads, high-end kitchen appliances, personal media players, consumer electronics, and more.
Features
- 16 Touch Keys with distributed Proximity Sensing
- Internal Capacitor Implementation (ICI). No external reference capacitors required
- Class leading proximity sensitivity with dedicated Prox Mode charging scheme
- User selectable gain through Antenna Tuning Implementation (ATI)
- All channels individually configurable for maximum design flexibility
- Advanced on-chip signal processing
- User selectable I²C and SPI communication
- High sensitivity
- Internal voltage regulator
- Supply voltage 2.85V-5.5V
- Low power modes (45uA)
- Active shield options
- RF detection
- Available in QFN(5x5)-32 package
- 8 General Purpose I/Os
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Applications
- Office machines
- Digital cameras
- Keypads
- High-end kitchen appliances
- Personal Media Players
- Consumer Electronics
- White goods and appliances
- Kiosk and POS Terminals
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Application Circuit
Azoteq IQS410 IQ Switch® - ProxSense™
XY Touch Panel ControllersAzoteq IQS410 IQ Switch® - ProxSense™ Series XY Touch Panel Controllers revolutionizes the touch panel industry by offering a cost-effective controller IC interfaced to a simplified touch panel. Azoteq IQS410 ProxSense XY Touch Panel Controllers offer class leading proximity sensitivity. The devices provide a PROXIMITY detected signal to activate features such as launching a menu screen, activating backlighting, or waking a system from sleep on the user approaching. The Azoteq IQS410 is a 6-channel capacitive sensing device that uses four channels to produce touchscreen coordinate data. Two additional channels implemented to be used as buttons with proximity and touch functionality by adding one capacitor to the design. These Azoteq touch panel controllers are ideal for use in a variety of applications, including navigation device,s media players, consumer electronics, and more.
Features
- System cost reduction through using a simplified single ITO layer touch panel
- Class leading proximity sensitivity - suitable for wake-up from sleep or launching a menu screen on a user approaching
- Increased reliability by reducing system complexity with reduced sensor lines and component count
- Serial Peripheral Interface (SPI)
- On-chip regulator providing lower Bill of Material (BOM) cost, increased stability and sensitivity
- User selectable Proximity threshold and Touch sensitivity settings
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Applications
- Navigation Devices
- Media Players
- Consumer Electronics
- White goods and appliances
- Office Equipment
- Keypads
- Kiosk and Point of Sale (POS) Terminals
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Circuit Overview
Pin Descriptions| Pin | Name | I/O | Description |
| 1 | RDY | Output | Data available indication from slave |
| 2 | SCK | Input | Clock from master |
| 3 | /SS | Input | / Slave select |
| 4 | RF | Input | RF detector |
| 5 | VDDHI | Supply Input | Supply Voltage Input |
| 6 | VSS | Ground Input | GND Reference |
| 7 | ICTRL | Custom | Current Reference |
| 8 | VREG | Analog Output | Internal Regulator Pin |
| 9 | MCLR | Input | Master Clear Pin |
| 10 | B1 | Bi-Directional | Button1 Sensor |
| 11 | CS2 | Bi-Directional | Reference Capacitor 2 (Buttons) |
| 12 | B0 | Bi-Directional | Button0 Sensor |
| 13 | Y1 | Bi-Directional | Vertical Sensor 1 |
| 14 | CS1 | Bi-Directional | Reference Capacitor 1 |
| 15 | X1 | Bi-Directional | Horizontal Sensor 1 |
| 16 | Y0 | Bi-Directional | Vertical Sensor 0 |
| 17 | CS0 | Bi-Directional | Reference Capacitor 0 |
| 18 | X0 | Bi-Directional | Horizontal Sensor 0 |
| 19 | MOSI | Input | Data output from master |
| 20 | SOMI | Output | Data output from slave |
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