Relays
[AK4184]
AK4184
TSC with Keypad Scanner and GPIO Expander
GENERAL DESCRIPTION The AK4184 is a 12-bit A/D converter witc...
Description
[AK4184]
AK4184
TSC with Keypad Scanner and GPIO Expander
GENERAL DESCRIPTION The AK4184 is a 12-bit A/D converter witch operates 125kHz (max) sampling rate with a 4-wire resistive touch screen controller (TSC), including low-on resistance switches, touch pressure measurement capability, a maximum 6 x 5 keypad scanner, eight GPIO ports, and a PWM generator for LED contrast control. The AK4184 operates down to a 2.5V supply voltage, and it tolerates digital I/O interface voltage from 1.6V to AVDD in order to connect to low voltage controllers. The AK4184 supports SPI interface for communication to a host controller. The AK4184 is available in a 41-pin BGA package and it operates over a temperature range of -40°C to +85°C. The AK4184 is suitable for Cellular Phone, DSC, DVC, Smart Phone and MP3 player application systems. FEATURES SPI Serial Interface 12 bit SAR A/D Converter with S/H Circuit 4-wire Resistive Touch Screen Interface Sampling Frequency: 125 kHz (max) Pen Pressure Measurement 6 x 5 Keypad Scanner 8 GPIO Ports PWM Generator for LED Bias Control Power Supply: AVDD = 2.5V ∼ 3.6V IOVDD = 1.6V ∼ AVDD (Digital I/F) Low Power Consumption (400μA) Package: 41pin BGA (4mm x 4mm, pitch 0.5mm)
MS0603-E-00 1
2007/04
Free Datasheet http://www.Datasheet4U.com
[AK4184]
C1
C2
C3
C4
C5
C6
R1
R2
R3
R4
R5
GP0 GP1 GP2 GP3
GP4
Keypad Scanner GPIO I/F
XP GP5 GP6 GP7
YP
IOVDD
XN
Control Logic
SCLK CSN DOUT
YN
VREF+ AIN+ AIN-
VREF-
Serial ...
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