| TYPE | DESCRIPTION |
|---|
| Mounting Style | Surface Mount |
| Number of Pins | 20 Pin |
| Supply Voltage (DC) | 1.80V (min) |
| Case/Package | QFN-20 |
| Supply Current | 10 mA |
| Number of Channels | 4 Channel |
| Number of Positions | 20 Position |
| Load Capacitance | 20 pF |
| Operating Temperature (Max) | 85 ℃ |
| Operating Temperature (Min) | -40 ℃ |
| Supply Voltage | 1.8V ~ 5.5V |
| Supply Voltage (Max) | 5.5 V |
| Supply Voltage (Min) | 1.8 V |
| TYPE | DESCRIPTION |
|---|
| Product Lifecycle Status | Unknown |
| Packaging | Cut Tape (CT) |
| Size-Length | 3.1 mm |
| Size-Width | 3.1 mm |
| Size-Height | 0.8 mm |
| Operating Temperature | -40℃ ~ 85℃ |
The AT42QT1040-MMH is a digital burst mode, charge-transfer (QT™) Capacitive Sensor Driver, designed for touch-key applications. It can sense from one to four keys-one to three keys can be disabled by not installing their respective sense capacitors. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. The outputs are fully debounced. Only a few external parts are required for operation. The device modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise and to suppress RF emissions.
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