The AK4185 is a 4-wire/5-wire resistive touch screen controller with SPI serial interface. The AK4185 incorporates a 12-bit A/D converter, enabling a precise measurement of pressed location its pressure. The AK4186 offers an automatic continuous measurement mode and complex sequential measurement option with MAV filter preprocessing, allowing a host controller to save its computing load. The AK4185 operates with a supply voltage down to 1.6V, and is available in a chip-scale ultra package, allowing the device ideally to be used for portable/mobile applications which require high performance touch screen sensing with low power and small footprint.

1. 4-wire or 5-wire Touch Screen Interface
2. SPI* Serial Interface
3. 12bit SAR A/D Converter with S/H circuit
4. Throughput Rate: 300Ksps (Typ.)
5. Pen Pressure Measurement (4-wire)
6. Continuous Read by one time command (External Clock Mode)
7. Built-in Clock Generator (For Sequence Mode)
8. Preprocessing with Median Averaging Filter (in Sequence Mode)
9. Screen Touch Detection Output Pin (PENIRQN)
10. On-chip Temperature Measurement
11. Low Voltage Operation: VDD = 1.6V ~ 3.6V
12. Low Power Consumption: 240µA at 1.8V
13. Auto Power Down
14. Package: 12-pin CSP (1.96mm x 1.46mm, pitch 0.5mm)
15. Software Compatible with AK4182A

* SPI is a trademark of Motorola, Inc