AK4186

更新时间： 2024-11-18 07:16:11

品牌	Logo	应用领域
AKM		控制器
页数	文件大小	规格书
33页	595K
描述
Low Power Touch Screen Controller with I2C Interface

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AK4186 数据手册

[AK4186]

AK4186

Low Power Touch Screen Controller with I²C Interface

GENERAL DESCRIPTION

The AK4186 is a 4-wire/ 5-wire resistive touch screen controller that incorporates 12bit SAR A/D

converter. The AK4186 can detect the pressed screen location with two A/D conversions and it can also

measure touch pressure. The AK4186 has both an automatic continuous measurement and a

measurement data calculation function. The functions that normally require external processing, such

as calculating the average screen input value, are processed by the AK4186. In addition, a new

sequential mode achieves short coordinate measurement time while greatly reducing the

microprocessor overhead. The AK4186 operates off of supply voltage down to 1.6V in order to connect

a low voltage microprocessor. The AK4186 is the best fit for cellular phone, DSC, DVC, smart phone

and other portable devices.

FEATURES

! 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)

VDD

TEST

CAD0

SCL

XP/BR

YP/TR

I²C

4/5wire

Touch

Screen

Drivers

Interface

Serial I/F

VREF+

AIN+

AIN-

SAR

ADC

Control

Logic

XN/TL

YN/BL

MUX

SDA

VREF-

IN/

WIPER

PENIRQN

Internal

Osc

VSS

Figure 1. Block Diagram

I²C-bus is a trademark of NXP B.V.

2011/03

MS1068-E-04

- 1 -

12 3 4 5 6 7...33

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