本文介紹了AK4186主要特性,,方框圖,4線和5線典型連接框圖,,觸摸屏輸入電路以及AKD4186-A評估板電路圖,。
AK4186是采用12位SAR ADC的 4線/5線電阻觸摸屏控制器,具有自動(dòng)連續(xù)測量和測量數(shù)據(jù)計(jì)算功能以及連續(xù)讀出功能,,I2C串行接口,,取樣速率22.2kHz,工作電壓1.6V-3.6V,,1.8V的功耗為60uA,,并具有自動(dòng)關(guān)機(jī)功能。主要用在手機(jī),,數(shù)碼相機(jī),,DVC和智能手機(jī)以及其它手提設(shè)備。
AK4186主要特性:
4-wire or 5-wire Touch Screen Interface
I2C Serial Interface
12bit SAR A/D Converter with S/H circuit
Sampling Rate: 22.2kHz
Pen Pressure Measurement (4-wire)
Continuous Read Function
Integrated Internal Osc (Sequence Mode)
Integrated Median Averaging Filter
Low Voltage Operation: VDD = 1.6V ~ 3.6V
PENIRQN Buffer Output
Low Power Consumption: 60μA at 1.8V
Auto Power Down
Package: 12pin CSP (1.7mm x 1.3mm, pitch 0.4mm)16pin QFN (3mm x 3mm, pitch 0.5mm)
圖1,。AK4186方框圖
圖2,。AK4186典型連接框圖(4線,,AK4186ECB)
圖3。AK4186典型連接框圖(4線,,AK4186EN)
圖4,。AK4186典型連接框圖(5線,AK4186ECB)
圖5,。AK4186典型連接框圖(5線,,AK4186EN)
AKD4186-A評估板
AKD4186-A is the board for evaluation of the touch screen controller AK4186, which adopted the CSP small package suitable for the cellular phone, the handheld game machine. Since AKD4186-A has a touch-screen I/F and a digital I/O power supply input terminal, it is easily connectable with a target system of low power/voltage drive. Furthermore, since the analog input terminal is equipped analog voltage can also be measured.
圖6。觸摸屏輸入電路
圖7,。AKD4186-A評估板電路圖