AK4188VN

AK4188VN Datasheet

[AK4188]

Part	Datasheet
AK4188VN	AK4188VN (pdf)

PDF Datasheet Preview
[AK4188] AK4188 Touch Screen Controller for Dual Touch Gestures GENERAL DESCRIPTION The AK4188 is a 4-wire resistive touch screen controller with an integrated 12-bit SAR A/D converter. It is capable of supporting dual touch gestures, and can detect both the pressed screen location and touch pressure. It can also detect the dual touch center location and the parameters related to two touch points distance. The AK4188 is available in a 16pin QFN, and it is ideal for touch screens for mobile phones, DSC, DVC, smart phones, and other portable devices. FEATURES - 4-wire Touch Screen Interface - SPITM Serial Interface - 12bit SAR A/D Converter with S/H circuit - Dual Touch Functions - Dual Touch Judgment - Dual Touch Information Outputs 1 Center Location 2 Parameter that Related to Dual Touch Distance - Pen Pressure Measurement - Continuous Read Function - Integrated Internal Osc Sequence Mode - Integrated Median Averaging Filter - Low Voltage Operation VDD = 2.7V ~ 3.6V TVDD = 1.6V ~ 3.6V Digital I/F - PENIRQN Buffer Output - General Purpose Analog Input - Low Power Consumption typ. 276uA 450Hz - Auto Power Down - Ta = −40 ~ 85 °C - Package 16pin QFN 3.0mm x 3.0mm, pitch 0.5mm SPITM is a registered trademark of Motorola, Inc. MS1396-E-00 -1- 2012/05 [AK4188] TVDD XP RXP XN YP RYP YN IN 4wire Touch Screen Drivers Interface VREF+ AIN+ SAR AIN V REF- Cal c ula tor Inte rn al Osc Figure Block Diagram SPI & Co ntrol Log ic TEST CSN SCLK SDI SDO PENIRQN • Ordering Guide AK4188EN AK4188VN AKD4188 −40 ~ +85°C 16pin QFN 3mm x 3mm, 0.5mm pitch −40 ~ +85°C 16pin QFN 3mm x 3mm, 0.5mm pitch AK4188EN/VN Evaluation Board *The AK4188EN is used for this board. • Pin Layout AK4188EN/VN 12 YP 11 RYP 10 RXP 9 XP YN 13 VSS 14 CSN 15 SCLK 16 AK4188 Top View 8 XN 7 VDD 6 IN 5 TEST SDI 1 SDO 2 TVDD 3 PENIRQN 4 MS1396-E-00 -2- 2012/05 [AK4188] PIN/FUNCTION AK4188EN/VN Pin No. Pin Name I/O Function I Serial Data Input O Serial Data Output TVDD - Digital I/F Power Supply 1.6V ~ 3.6V PENIRQN O Pen Interrupt Output CMOS output The PENIRQN pin is “L” when touch-screen press is detected. This pin is always “H” or “Hi-z” irrespective of touch-press in sleep mode. This pin acts as “Busy” active low in internal calculations. TEST I TEST pin This pin must be connected to VSS. TEST pin has internal pull-down device, nominally 100 I Auxiliary Analog Input - Power Supply and External Reference Input 2.7V ~ 3.6V I/O Touch Panel X- Input Touch Panel X- Driver pin through a resistor for dual touch I/O Touch Panel X+ Input Touch Panel X+ Driver pin O Touch Panel X+ Driver pin through a resistor for dual touch O Touch Panel Y+ Driver pin through a resistor for dual touch I/O Touch Panel Y+ Input Touch Panel Y+ Driver pin I/O Touch Panel Y- Input Touch Panel Y- Driver pin through a resistor for dual touch

PDF Datasheet Preview

[AK4188]

AK4188

Touch Screen Controller for Dual Touch Gestures

GENERAL DESCRIPTION The AK4188 is a 4-wire resistive touch screen controller with an integrated 12-bit SAR A/D converter. It is capable of supporting dual touch gestures, and can detect both the pressed screen location and touch pressure. It can also detect the dual touch center location and the parameters related to two touch points distance. The AK4188 is available in a 16pin QFN, and it is ideal for touch screens for mobile phones, DSC, DVC, smart phones, and other portable devices.

FEATURES - 4-wire Touch Screen Interface - SPITM Serial Interface - 12bit SAR A/D Converter with S/H circuit - Dual Touch Functions
- Dual Touch Judgment - Dual Touch Information Outputs
1 Center Location 2 Parameter that Related to Dual Touch Distance - Pen Pressure Measurement - Continuous Read Function - Integrated Internal Osc Sequence Mode - Integrated Median Averaging Filter - Low Voltage Operation VDD = 2.7V ~ 3.6V

TVDD = 1.6V ~ 3.6V Digital I/F - PENIRQN Buffer Output - General Purpose Analog Input - Low Power Consumption typ. 276uA 450Hz - Auto Power Down - Ta = −40 ~ 85 °C - Package 16pin QFN 3.0mm x 3.0mm, pitch 0.5mm

SPITM is a registered trademark of Motorola, Inc.

MS1396-E-00 -1-
2012/05
[AK4188]

TVDD

XP RXP

XN YP RYP YN IN
4wire Touch Screen Drivers Interface

VREF+

AIN+ SAR

AIN V REF-

Cal c ula tor

Inte rn al Osc

Figure Block Diagram

SPI &

Co ntrol Log ic

TEST

CSN SCLK SDI SDO PENIRQN
• Ordering Guide

AK4188EN AK4188VN AKD4188
−40 ~ +85°C 16pin QFN 3mm x 3mm, 0.5mm pitch −40 ~ +85°C 16pin QFN 3mm x 3mm, 0.5mm pitch AK4188EN/VN Evaluation Board *The AK4188EN is used for this board.
• Pin Layout

AK4188EN/VN
12 YP 11 RYP 10 RXP 9 XP

YN 13 VSS 14 CSN 15 SCLK 16

AK4188

Top View
8 XN 7 VDD 6 IN 5 TEST

SDI 1 SDO 2 TVDD 3 PENIRQN 4

MS1396-E-00 -2-
2012/05
[AK4188]

PIN/FUNCTION AK4188EN/VN

Pin No. Pin Name I/O

Function

I Serial Data Input

O Serial Data Output

TVDD
- Digital I/F Power Supply 1.6V ~ 3.6V

PENIRQN O Pen Interrupt Output CMOS output

The PENIRQN pin is “L” when touch-screen press is detected. This pin is always
“H” or “Hi-z” irrespective of touch-press in sleep mode.

This pin acts as “Busy” active low in internal calculations.

TEST

I TEST pin

This pin must be connected to VSS.

TEST pin has internal pull-down device, nominally 100

I Auxiliary Analog Input
- Power Supply and External Reference Input 2.7V ~ 3.6V

I/O Touch Panel X- Input

Touch Panel X- Driver pin through a resistor for dual touch

I/O Touch Panel X+ Input

Touch Panel X+ Driver pin

O Touch Panel X+ Driver pin through a resistor for dual touch

O Touch Panel Y+ Driver pin through a resistor for dual touch

I/O Touch Panel Y+ Input

Touch Panel Y+ Driver pin

I/O Touch Panel Y- Input

Touch Panel Y- Driver pin through a resistor for dual touch

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AK4188VN Datasheet file may be downloaded here without warranties.

Datasheet ID: AK4188VN 515870