AK4184 Datasheet, PDF (1/36 Pages) Asahi Kasei Microsystems – TSC with Keypad Scanner and GPIO Expander

[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