[AK4184A]
AK4184A
TSC with Keypad Scanner and GPIO Expander
GENERAL DESCRIPTION
The AK4184A 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 AK4184A 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 AK4184A supports SPI interface for
communication to a host controller. The AK4184A is available in a 41-pin BGA package and it operates
over a temperature range of -40°C to +85°C. The AK4184A 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)
MS0947-E-00
-1-
2008/04
AKM [ ASAHI KASEI MICROSYSTEMS ]
