ak4181a AKM Semiconductor, Inc., ak4181a Datasheet - Page 5

• Manufacturer Part Number: ak4181a
• Description: Touch Screen Controller
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Ta=-20°C to 70°C, VCC=2.7V, External Vref =2.5V, fs=125kHz, fDCLK=16*fs, 12bit mode
Parameter
ADC for Touch Screen
Resolution
No Missing Codes
Integral Linearity Error
DNL
Analog Input Voltage Range
Offset Error
Gain Error
Touch Panel Driver
XP Pull Up Register (when pen interrupt enable)
PSRR (10KHz 100mVpp)
Reference Output
Internal Reference
Drift
Load Capacitance
Reference Input
Input Voltage Range
Battery Monitor
Input Voltage Range
Input Impedance (Battery Measure Mode)
Accuracy (Note 2) External VREF = 2.5V is used
Accuracy (Note 2) Internal Reference is used.
Temperature Measurement
Temperature Range
Resolution (Note 3)
Accuracy (Note 4)
Power Supply Current
Normal Mode (Internal Reference OFF)
Normal Mode (Internal Reference ON)
Full Power Down(when writing control command with PD1=PD0= “0”)
Note 2. Accuracy is the difference between the output code when 5 volts is input to the VBAT pin and the “ideal” code at 1.25
Note 3. “ideal” value derived from theory
Note 4. Accuracy is defined as the difference between the voltage measured by two current sources, and the ideal voltage derived
MS0313-E-00
XP, YP, RL=300Ω
XN, YN, RL=300Ω
from theory at specific temperatures.
volts.
Analog Characteristics
5
2.45
min
-20
0.1
11
0
5
2.50
250
520
typ
1.6
±1
±3
12
12
50
70
30
10
5
5
0
VCC
max
Vref
2.55
500
800
5.0
±2
±6
±4
±2
±3
70
3
[AK4181A]
2004/06
ppm/°C
Units
LSB
LSB
LSB
LSB
Bits
Bits
KΩ
KΩ
µA
µA
µA
dB
µF
°C
°C
°C
%
%
V
Ω
Ω
V
V
V