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Updated at 17/06/2025 10:30:15(UTC+8)
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Description
- Product Details
- The AD7142 and AD7142-1 are integrated capacitance-to-digital converters (CDCs) with on-chip environmental calibration for use in systems requiring a novel user input method. The AD7142 and AD7142-1 can interface to external capacitance sensors implementing functions such as capacitive buttons, scroll bars, or wheels.
- The CDC has 14 inputs channeled through a switch matrix to a 16-bit, 250 kHz sigma-delta (∑-Δ) capacitance-to-digital converter. The CDC is capable of sensing changes in the capacitance of the external sensors and uses this information to register a sensor activation. The external sensors can be arranged as a series of buttons, as a scroll bar or wheel, or as a combination of sensor types. By programming the registers, the user has full control over the CDC setup. High resolution sensors require minor software to run on the host processor.
- The AD7142 and AD7142-1 have on-chip calibration logic to account for changes in the ambient environment. The calibration sequence is performed automatically and at continuous intervals, when the sensors are not touched. This ensures that there are no false or nonregistering touches on the external sensors due to a changing environment.
- The AD7142 has an SPI-compatible serial interface, and the AD7142-1 has an I2C-compatible serial interface. Both parts have an interrupt output, as well as a general-purpose input/ output (GPIO).
- The AD7142 and AD7142-1 are available in a 32-lead, 5 mm × 5 mm LFCSP_VQ and operate from a 2.6 V to 3.6 V supply. The operating current consumption is less than 1 mA, falling to 50 μA in low power mode (conversion interval of 400 ms).
- **Applications**
- Personal music and multimedia players
- Cell phones
- Digital still cameras
- Smart hand-held devices
- Television, A/V, and remote controls
- Gaming consoles
- ### Features and Benefits
- Programmable capacitance-to-digital converter
- 36 ms update rate (@ maximum sequence length)
- Better than 1 fF resolution
- 14 capacitance sensor input channels
- No external RC tuning components required
- Automatic conversion sequencer
- On-chip automatic calibration logic
- Automatic compensation for environmental changes
- Automatic adaptive threshold and sensitivity levels
- On-chip RAM to store calibration data
- SPI®-compatible serial interface (AD7142)
- I2C®-compatible serial interface (AD7142-1)
- |
- Separate VDRIVE level for serial interface
- Interrupt output and GPIO
- 32-lead, 5 mm x 5 mm LFCSP_VQ
- 2.6 V to 3.6 V supply voltage
- Low operating current
- Full power mode: less than 1 mA
- Low power mode: 50 μA
- ---|---
AD7142 Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Show | |
| Product Lifecycle Status | Active |
Order guide
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- Please confirm with the logistics company in advance for remote areas.
(Additional charges ($35-$50) may apply for delivery in these areas)
- Delivery date: usually 2 to 7 working days.
- A tracking number will be sent after your order ships.
- - Carefully inspected and packed by ManyChip warehouse - Vacuum packaging - Anti-static packaging - Shockproof foam
- The terms here are for reference only, the actual terms are subject to the sales quotation. - Please confirm product specifications when ordering. - MOQ refers to the minimum order quantity required to purchase each part. - If you have special ordering instructions, please indicate them on the ordering page. - Inspection (PSI) will be performed prior to shipment.
- - Income Quality Control (IQC), 1000+ qualified dealers. - Chips are tested by authoritative organizations to ensure the quality, authenticity and safety of your device. - Decapsulation control - X-ray control - XRF inspection - Electrical testing - Surface testing -Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity
Contact Us
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