Wish to use electronic touch sensors that are extremely low powered and have extremely fast response time? As a breakthrough in human input device, using ATLab¡¯s proprietary impedance matching technology, this full-digitally implemented DCC not only enables an easy realization of navigation and access to contents in portable devices such as mobile phone, multimedia players and PDA¡¯s, but also is able to replace various types of mechanical switches and buttons used in so many electronic products.
ATA2501 consumes extremely low current (120uA) in active mode and has 2 msec of response time, fastest among other similar devices.
ATA2501 can detect up to 12 touch sensing inputs and these are transferred to MCU (Micro-Controller Unit) for further translations and actions.
ATA2501 is so sensitive that touch pad can be as small as 1mm by 1mm. The pad size will depend on how thick the material you want to cover the PCB.
Note that the PCB pattern for touch pads can have any shape. Three basic types in touch pads on PCB are
How DCC works can be explained conceptually in the following MOVIE.
Automatic Impedance Calibration (AIC), another ATLab¡¯s patented technology, ensures consistent sensitivity that can be fluctuated not only by external temperature and humidity, but also by production deviations between produced PCBs as well as between production lots. As shown in the above figure, by setting proper value of ? you can maintain consistent sensitivity regardless of the external environment changes. A software tool kit is provided for you to adjust several parameters so that you can have more design flexibility and reduce PCB design iterations to have optimal settings.
ATA2501 comes with several package types to give you further design flexibility
Package Type
Product Code
Package Dimension
Pin Pitch
Digital Output (AIC mode)
Quad. Output
No. of Sensor Inputs
View
48TQFP
ATA2501DB- 48TQ
9mm X 9mm (Lead Included)
0.5mm
3ea (AIC)
Available
12ea
48QFN
ATA2501DB- 48QN
7mm X 7mm
0.5mm
3ea (AIC)
Available
12ea
40QFN
ATA2501DB- 40QN
5mm X 5mm
0.4mm
Not Available
Not Available
12ea
32QFN
ATA2501DB- 32QN
5mm X 5mm
0.5mm
Not Available
Not Available
9ea
Up to 12 contact sensor inputs used for scroll, navigation and selection
Versatile interfaces available; Serial
Interface, Direct I/O Interface, and Quadrature
Interface
Software development tool kit to support user¡¯s own sensor layout for maximum design flexibility
Automatically adjusts sensor sensitivity
to cope with various operating environment
No external clock source is required
Supports idle and sleep/suspension
modes for power saving
Highly reliable ESD protection (up to 15KV in MM and 8kV in HBM)
ROHS compliant (lead-free package)
Portable devices such
as PDA¡¯s, mobile phones, MP3 players, remote controllers,
and other integrated input
devices
Home appliances and consumer electronic
products
Computer peripherals such as mice
for desktop and laptop PC¡¯s
