AK4181A

[AK4181A]
AK4181A
„
125kHz (max)
„
„
„
„
„
„
(2.5V)
„
12bit ADC
S/H
„
(250μA
„
(2.7V 3.6V)
„ Package
16pin TSSOP
AK4181A
AK4181A
125kHz
12
2.7V
DCLK
XP
CSN
YP
DIN
Control
Logic
XN
YN
DOUT
BUSY
IN1
Internal VREF(2.5V)
VREF
IN2
VBAT
R1
R2
VREF+
AIN+
AIN-
VREF-
12bit
ADC
(SAR type)
PENIRQN
PEN
INTERRUPT
Temp.
Sensor
VCC
MS0313-J-02
1
GND
2010/09
[AK4181A]
„
AK4181AVT
-20°C ∼ +70°C
16pin TSSOP
„
MS0313-J-02
VCC
1
16
DCLK
XP
2
15
CSN
YP
3
14
DIN
XN
4
13
BUSY
YN
5
12
DOUT
GND
6
11
PENIRQN
VBAT
7
10
IN2
IN1
8
9
Top View
2
VREF
2010/09
[AK4181A]
No.
1
2
Signal Name
VCC
XP
I/O
I/O
3
YP
I/O
4
XN
I/O
5
YN
I/O
6
7
8
9
GND
VBAT
IN1
VREF
I
I
I/O
10
11
IN2
PENIRQN
12
13
14
DOUT
BUSY
DIN
I
O
O
O
I
15
CSN
I
16
DCLK
I
MS0313-J-02
Description
Power Supply
Touch Screen X+ plate Voltage supply
„X
X+
„Y
ADC
„
Z1
ADC
„
OPEN
„
50k
Touch Screen Y+ plate Voltage supply
„Y
Y+
„X
ADC
„
Y+
„
OPEN
„
OPEN
Touch Screen X- plate Voltage supply
„X
X„Y
OPEN
„
X„
OPEN
„
OPEN
Touch Screen Y- plate Voltage supply
„Y
Y„X
OPEN
„
Z2
ADC
„
OPEN
„
GND
Ground
Analog Input for Battery Monitor
Auxiliary 1 Analog Input
Voltage Reference Input/Output
2.5V
Auxiliary 2 Analog Input
Pen Interrupt Output
100KΩ PullUp
CSN = “H”
Enable
“H”
CSN = “H”
Disable
“H”
CSN = “L”
„
Serial A/D Data Output
A/D
DCLK ↓ MSB
MSB
BUSY ↓
CSN = “L”
AD
CSN = “H”
Hi-Z
BUSY Output
CSN↓ “L”
8DCLK↓
CSN = “H”
Hi-Z
Serial Data Input
CSN = “L”
8
AK4181A
DCLK ↑
“L”
„
“L”
9DCLK↓
“H”
“L”
Chip Select Input
CSN = “L”
External Clock Input
3
2010/09
[AK4181A]
GND = 0V (Note 1)
Parameter
Power Supplies
Input Current (any pins except for supplies)
Input Voltage
Touch Panel Drive Current
Ambient Temperature (power supplied)
Storage Temperature
Symbol
VCC
IIN
VIN
IOUTDRV
Ta
Tstg
min
-0.3
-0.3
max
6.0
±10
6.0(VCC+0.3)
50
70
150
-20
-65
Units
V
mA
V
mA
°C
°C
Note 1.
:
GND = 0V (Note 1)
Parameter
Power Supplies
Symbol
VCC
min
2.7
typ
3.3
max
3.6
Units
V
Note 1.
:
MS0313-J-02
4
2010/09
[AK4181A]
Ta = -20°C to 70°C,VCC = 2.7V, External Vref = 2.5V, fs = 125kHz, fDCLK = 16*fs, 12bit mode
Parameter
min.
typ.
ADC for Touch Screen
Resolution
12
No Missing Codes
11
12
Integral Linearity Error
DNL
±1
Analog Input Voltage Range
0
Offset Error
Gain Error
Touch Panel Driver
5
XP, YP, RL = 300Ω
5
XN, YN, RL = 300Ω
XP Pull Up Register (when pen interrupt enable)
50
PSRR (10KHz 100mVpp)
70
Reference Output
Internal Reference
2.44
2.50
Drift
30
Load Capacitance
0.1
Reference Input
Input Voltage Range
Battery Monitor
Input Voltage Range
Input Impedance (Battery Measure Mode)
5
10
Accuracy (Note 2) (
VREF
)
Accuracy (Note 2) (
VREF
)
Temperature Measurement
Temperature Range
-20
1.6
Resolution (Note )
±3
Accuracy (Note )
Power Supply Current
Normal Mode (Internal VREF OFF)
250
Normal Mode (Internal VREF ON)
520
0
Full Power Down (
PD1=PD0= ”0“
)
Note 2.
2. 5V VBAT
Note 3.
Note 4.
MS0313-J-02
max.
±2
Vref
±6
±4
Units
Bits
Bits
LSB
LSB
V
LSB
LSB
Ω
Ω
KΩ
dB
2.56
V
ppm/°C
μF
VCC
V
5.0
V
KΩ
%
%
±2
±3
70
°C
°C
°C
500
800
3
μA
μA
μA
1.25V
2
5
2010/09
[AK4181A]
DC
Ta=-20 to 70°C, VCC=2.7V to 3.6V
Parameter
“H” level input voltage
“L” level input voltage
Input Leakage Current
“H” level output voltage (@ Iout = -250uA)
“L” level output voltage
(@ Iout = 250uA)
Tri-state Leakage Current
All pins except for XP, YP, XN, YN pins
XP, YP, XN, YN pins
PENIRQN “L” level output voltage (100KΩ Pull-Up)
Ta=-20°C to 70°C, VCC=2.7V to 3.6V
Parameter
Touch Panel (A/D Converter)
Throughput Rate
DCLK
frequency
duty
Tracking Time (Rin=600Ω) ( Note 5)
Conversion Time
CSN “↓” to First DCLK “↑”
CSN “↓” to BUSY Tri-State Disabled
CSN “↓” to DOUT Tri-State Disabled
DCLK High Pulse Width
DCLK Low Pulse Width
DCLK “↓” to BUSY “↑”
Data Setup Time
Data Valid to DCLK Hold Time
Data Output Delay after DCLK “↓”
CSN “↑” to DCLK Ignored
CSN “↑” to BUSY High-Z state
CSN “↑” to DOUT High-Z state
Note 5.
3tDCLK
Symbol
VIH
VIL
IILK
VOH
VOL
IOLK
min.
0.8xVCC
typ.
-
-10
VCC-0.4
-
-
-10
-50
VOLP
Symbol
min
typ
fs
fDCLK
10
duty
40
tTRK
1.428
tCONV
t1
100
t2
t3
t4
190
t5
190
t6
t7
100
t8
10
t9
t10
0
t11
t12
(tDCLK = 1/fDCLK)
50
max.
0.4
Units
V
V
μA
V
V
10
50
0.8
μA
μA
V
max
Units
125
kHz
2100
60
kHz
%
μs
1/fDCLK
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
0.2xVCC
10
12
200
200
160
160
200
200
CSN
50%VCC
t5
t1
t6
t6
t9
t4
t10
DCLK
50%VCC
t8
t7
PD0
50%VCC
DIN
t2
t11
VOH
BUSY
VOL
t12
t3
DOUT
D11
D10
D0
Figure 1 Timing Diagram
MS0313-J-02
6
2010/09
VOH
VOL
[AK4181A]
„
A/D
12 bit
A/D
A/D
12
A/D
Table 1
(ΔVREF-1.5LSB)~ ΔVREF
(ΔVREF-2.5LSB) ~ (ΔVREF-1.5LSB)
--------0.5LSB ~ 1.5LSB
0 ~ 0.5LSB
ΔVREF (VREF+) – (VREF-)
FFFH
FFEH
--------001H
000H
Table 1
ΔVREF
A/D
8
„
A2, A1, A0
YP
SER/ DFR
XP,
“0”
SER/ DFR
ΔVREF
A/D
X
(XP) – (XN)
(YP) – (XN)
X
ΔAIN
SER/ DFR
”1”
A/D
ΔVREF
GND
GND
ΔAIN
A/D
SER/ DFR = “0”
VREF
CSN = “L”
(Rin)
GND
IN2
VBAT, IN1
VREF
IN2
START
Rin
125kHz
A/D
5DCLK
600
8CLK
1.428
s 2.1MHz
3tDCLK
ADC
„
YP
2
XP, XN
X
Y
A/D
MS0313-J-02
7
2010/09
[AK4181A]
ON
ON
XP
VREF
XP
AIN+
VREF
YP
ADC
VREF-
AIN+
YP
ADC
VREF-
AIN-
AIN-
XN
XN
ON
YN
YN
ON
a)
X-Position Measurement Differential Mode
b)
Y-Position Measurement Differential Mode
Figure 2
A/D
ON
3DCLK
ON
A/D
OFF
PD0
“0”
„
YP
VREF+
XN
VREF-
XP YN
2
X
Z1
Rtouch =
Rxplate
Z2
Rxplate
X
X
Y
Xposition/4096
Y
* [ (Z2/Z1) – 1]
Rxplate, Ryplate
Z1
Rtouch = (Rxplate*Xposition/4096)*[(4096/Z1) – 1] – Ryplate*[1 – (Yposition/4096)]
MS0313-J-02
8
2010/09
[AK4181A]
ON
ON
YP
YP
XP
VREF+
AIN+
VREF-
AIN-
touch
XP
ADC
VREF+
AIN+
VREF-
AIN-
touch
ADC
XN
XN
ON
ON
YN
a)
YN
b)
Z1-Position Measurement Differential Mode
Z2-Position Measurement Differential Mode
Figure 3
„
VREF
AK4181A
2.5V
VREF
PD1
“1”
“0”
PD1
VREF
VREF
“1”
0.1μF
VREF
400μs
0.1μF
PD1
“0”
„
AK4181A
2.7~3.6V
Figure 4
VBAT
R1
R2
5V
7.5k 2.5k
5μs
VBAT
VREF
PD1
Internal
VREF(2.5V)
VBAT
AIN+
R0
VREF+
ADC
R1=7.5K
AIN-
VREF-
R2=2.5K
Enable
Figure 4
MS0313-J-02
9
2010/09
[AK4181A]
„
iD = I0exp(vD/VT) (
I0:
q : 1.602189×10-19 (
k : 1.38054×10-23(
vD:
T:
VT = kT/q)
<1>
)
)
Temp.
Sensor
I
82I
TEMP0
TEMP1
Figure 5
AK4181A
Figure 5
2
2
2
2
<1>
(iD2 / iD1) = exp {(V(82I) – V(I))/VT}
N = (iD2 / iD1) = 82 (
)
T°C = ΔVbe * q /(k * ln N) – 273
ΔVbe = V(82I) – V(I)
T°C = 2.63×103 × ΔVbe – 273
<2>
1
2
T = (k/q)* vD/ln(iD/I0)
MS0313-J-02
<2>
10
2010/09
[AK4181A]
„
8
AK4181A
Table 2
DCLK
AK4181A
D7
S
D6
A2
BIT
7
6-4
3
Name
S
A2-A0
MODE
2
SER/ DFR
3
PD1-PD0
A2
CSN = “L”
DCLK
A1
A0
D5
A1
D4
A0
D3
MODE
D2
SER/ DFR
D1
PD1
D0
PD0
“H”
ADC
A/D
12
/8
“L” 12
“H”
8
ADC
„
SER/
XP
XN
YP
YN
ADC
AIN+
(ΔAIN)
AIN-
VREF+
(ΔVREF)
VREF-
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
TEMP0
XP
VBAT
XP(Z1)
YN(Z2)
YP
IN1
TEMP1
GND
GND
GND
GND
GND
GND
GND
GND
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
GND
GND
GND
GND
GND
GND
GND
GND
OFF
OFF
ON
ON
XP
YN
YP
YN
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
XP(Z1)
YN(Z2)
YP
IN2
XN
XN
XN
GND
YP
YP
XP
VREF
XN
XN
XN
GND
Note
DFR
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Note 6. IN2
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
TEMP0
Y
(Z1)
(Z2)
X
IN1
TEMP1
NA
Y
NA
(Z1)
(Z2)
X
IN2
(Note 6)
NA
SER/ DFR = “0”
Table 2
MS0313-J-02
11
2010/09
[AK4181A]
„
PD1, PD0
PD1
2
PD0
A/D
PD0 = “1”
YN
XP, YP, XN
PD1
0
PD0
0
CSN = “L”
CSN = “L”
5DCLK↑
OFF
CSN = “L”
A/D
7DCLK↑
8DCLK↑
CSN = “H”
PENIRQN
Enabled
A/D
CSN = “H”
OPEN
A/D
GND
YN
„
0
1
Enabled
ADC ON
CSN = “L”
A/D
ADC
ON
X
Y
ON
CSN = “H”
1
0
Enabled
VREF ON
CSN
CSN = “L”
A/D
A/D
ON
5DCLK↓ 20DCLK↓
AD
CSN
PENIRQN
1
1
Disabled
ADC
ON
PEN
ON/OFF
CSN = “H”
PENIRQN
“H”
CSN = “L”
Table 3
„
CSN, DCLK, DIN, DOUT
4
CSN
1
2
3
4
5
6
7
8
MO SER/
DFR
PD1
PD0
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
DCLK
S
DIN
A2
A1
A0
S
A2
5
4
A1
A0
MO SER/
DFR
PD1
PD0
Hi-Z
BUSY
11
Hi-Z
10
9
8
7
6
3
2
1
0
DCLK
↑
11
10
DOUT
Driver SW
SER/ DFR
=”1”
Driver SW
SER/ DFR
=”0”
Figure 6
↓
DIN
MSB S
CSN
MS0313-J-02
BUSY
DOUT
CSN
“H”
Hi-Z
↓
“L”
AK4181A
“H”
12
2010/09
[AK4181A]
5DCLK↓
8DCLK↓
SER/ DFR = “1”
ADC
PD0 = “0”
ON
SER/ DFR = “0”
5DCLK↓
20 DCLK↓
ON
PD0 = ”1”
8DCLK↓
9DCLK↓
8bit
5DCLK↓
ON
BUSY “H”
DOUT
7DCLK
9DCLK↓
MSB
CSN = “H”
“L”
A/D
DIN = “L”
A/D
15DCLK
A/D
„
A/D
YN
GND
100KΩ
50K
XP
XP
Ri
PENIRQN
2
(VCC)--- (Ri)--- (X+)---(Y-)
PENIRQN
“L”
PENIRQN
CSN = “H”
PENIRQN
PD1
“L”
PENIRQN
CSN = “L”
8DCLK↑
PD0
PD1
“H”
“H”
(1,1)
PD0
“1”
PENIRQN
„
PD0
CSN = “H”
PD0
PD1
PD0
ON/OFF
CSN = “H”
ON
i.
CSN = “L”
5DCLK↓
20DCLK↓
PENIRQN
X
Y
“L”
VBAT IN1IN2
ii.
CSN = “L”
5DCLK↓
PENIRQN
“0”
PD0 “1”
“H”
PD0
X
VBAT IN1 IN2
“H”
iii.
CSN = “L” 20DCLK↓
PENIRQN
“0”
PD0
“1”
PENIRQN
VBAT IN1 IN2
Y
“L”
PD0
PD0
“L”
X
Y
“H”
“L”
“H”
A/D
MS0313-J-02
PD0
“H”
PENIRQN
“L”
CSN
13
“L”
PEN
2010/09
[AK4181A]
100kΩ
PENIRQN
EN2
50kΩ
Driver OFF
XP
EN1
YN
Driver ON
Figure 7
CSN
1
2
3
4
5
6
7
8
MO SER/
DFR
PD1
PD0
9
10
11
12
13
14
15
16
9
8
7
6
5
17
18
19
20
21
22
23
24
DCLK
DIN
S
A2
A1
A0
BUSY
11
10
4
3
2
1
0
DOUT
CONV
Internal
AXIS = ((!A2) & (!A1) & (A0))
| ((!A2) & (A1) & (A0))
| ((A2) & (!A1) & (!A0))
| ((A2) & (!A1) & (A0));
/* X
/* Z1
/* Z2
/* Y
*/
*/
*/
*/
EN1 = ((!CSN) & (!CONV) & AXIS & PD0)
/* CSN = “L” X/Y/Z1/Z2
| ((!CSN) & AXIS & CONV);
/* CSN = “L”, X/Y/Z1/Z2
PD0 = 1 5DCLK↓~20DCLK↓
*/
5DCLK↓~20DCLK↓
EN2 = ((!CSN) & (!CONV) & (!PD0))
/* CSN = “L”, PD0 = 1, 5DCLK↓~20DCLK↓
| (CSN & (!DCLK) & (!(PD1& PD0));
/* CSN = “H”
DCLK = “L”
PD0, PD1
*/
*/
(1,1)
*/
„
(PD1,PD0)
([PD1,PD0]=[1,1])
ON
8
CSN = “L”
CSN= “H”
CSN = “H”
MS0313-J-02
CSN = “H”
CSN = “L”
1
14
2010/09
[AK4181A]
16pin TSSOP (Unit: mm)
1.1 (max)
*5.0±0.1
16
9
8
1
0.13
6.4±0.2
*4.4±0.1
A
0.65
0.22±0.1
M
0.17±0.05
Detail A
0.5±0.2
0.1±0.1
Seating Plane
0.10
NOTE: Dimension "*" does not include mold flash.
0-10°
„
:
:
:
MS0313-J-02
15
2010/09
[AK4181A]
AKM
4181AVT
XXYYY
Contents of XXYYY
XX:
Lot #
YYY:
Date Code
Date (YY/MM/DD)
04/08/30
10/09/17
MS0313-J-02
Revision
01
02
Reason
Page
Contents
15
16
2010/09
[AK4181A]
z
z
z
z
z
z
MS0313-J-02
17
2010/09