E0C63256
● Analog Circuit Characteristics
LCD Drive Voltage Characteristics
(Unless otherwise specified: VDD=2.7 to 5.5V, VSS=0V, VC2/VC1 are internal voltage, Ta=-20 to 85°C, C
2=C3=0.1µF)
Characteristic
LCD supply voltage
LCD drive voltage
Symbol
Condition
Min.
2.7
Typ.
Max.
5.5
Unit Note
V
C3I
VC3
V
V
1
2
VC1
Connect 1 MΩ load resistor between VSS or VDD Typ. - 0.2
and VC1 (without panel load)
Connect 1 MΩ load resistor between VSS or VDD Typ. - 0.2
and VC2 (=VC2) (without panel load)
V
V
V
C3·1/3 Typ. + 0.2
C3·2/3 Typ. + 0.2
C3·1/2 Typ. + 0.2
(when 1/3 bias is selected)
V
V
R
C2
V
V
2
2
2
LCD drive voltage
(when 1/2 bias is selected)
Built-in resistance
C1&2 Connect 1 MΩ load resistor between VSS or VDD and
C1(=VC2)(without panel load), VC1 and VC2 are shorted
LCD Resistance between VC3 and VSS
Typ. - 0.2
V
30
50
100
kΩ
Note) 1. When "Internal power (external VC3 is used)" is selected by mask option.
2. VC3 = VDD when "Internal power (external VC3 is not used)" is selected by mask option.
A/D Conversion Characteristics
(Unless otherwise specified: VDD=2.7 to 5.5V, VSS=AVSS=0V, Ta=-20 to 85°C)
Characteristic
Analog supply voltage
Analog reference voltage range
Analog input voltage range
Analog input capacitance
Analog reference resistance
Resolution
Symbol
Condition
AVDD
AVREF
Min.
2.7
2.7
Typ.
Max.
Unit Note
V
V
VAVDD
VREF
VIN
VDD
AVDD
AVREF
60
30
8
AD0 to AD3 (P40 to P43)
AD0 to AD3 (P40 to P43)
REF Resistance for AVREF–AVSS
AVSS
V
C
R
–
AIN
During sampling
35
20
pF
kΩ
bit
10
Offset error
Full scale error
Non-linearity error
Overall error
A/D conversion time
Sampling time
E
E
E
E
OFF
AVDD=2.7V to VDD
AVREF=2.7V to AVDD
-1
-1
-2
-2
20
1
1
4
4
LSB
LSB
LSB 1,2
LSB 1,2
clock
clock
1
1
FS
LI
T
f
AD=240kHz to 2.5MHz
t
t
ADC
SMP
f
f
AD=240kHz to 2.5MHz
AD=240kHz to 2.5MHz
21
1
1
8
Note) 1.
fAD=fPRS=fOSC/2n or fAD=fOSC/2 (fAD: A/D conversion clock frequency, fOSC: oscillation clock frequency, n=1–16: PRSM setting value + 1)
2. The best straight line within a ±3LSB of error can be obtained by correcting the conversion result with -1LSB by software.
a
c
FFH
Ideal line
b
Real conversion curve
End point line
00H
AVSS
AVREF
Analog input voltage VIN
Offset error
: EOFF = a (the deviation from the ideal value at zero point)
Non-linearity error : ELI = b (the deviation of the real conversion curve from the end point line)
Full scale error
: EFS = c (the deviation from the ideal value at the full scale point)
Total error
: E
E
T
= max (EOFF, ELI, EABS
)
ABS = the deviation from the ideal line (including quantizing error)
6
SEIKO [ SEIKO EPSON CORPORATION ]
