29 eleCTRiCal ChaRaCTeRiSTiCS
S1C17624/604/622/602/621 TeChniCal Manual
Seiko epson Corporation
29-11
S1C17602/621 lCD driver circuit current consumption
Unless otherwise specified: V
DD
= 1.8 to 3.6V, V
SS
= 0V, Ta = 25
°
C, C
2
–C
5
= 0.1µF, No LCD panel load,
PCKEN[1:0] = 0x0 (OFF), FLCYC[2:0] = 0x4 (1 cycle), CCLKGR[1:0] = 0x0 (gear ratio 1/1)
item
Symbol
Condition
Min.
Typ.
Max.
unit
LCD circuit current with V
C2
reference
voltage
*
1
I
LCD2
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 2.5
to 3.6V, VCSEL = 1
1
3
µA
Heavy load protection mode
LCD circuit current with V
C2
reference
voltage
*
1
I
LCD2H
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 2.5
to 3.6V, LHVLD = 1, VCSEL = 1
21
32
µA
LCD circuit current with V
C1
reference
voltage
*
1
I
LCD1
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 1.8
to 3.6V, VCSEL = 0
1.5
5
µA
Heavy load protection mode
LCD circuit current with V
C1
reference
voltage
*
1
I
LCD1H
DSPC[1:0] = 0x1 (checker pattern),
LC[3:0] = 0xf, OSC1 = 32kHz, V
DD
= 1.8
to 3.6V, LHVLD = 1, VCSEL = 0
13
20
µA
*
1 This value is added to the current consumption in HALT mode or current consumption during execution when the LCD circuit is ac-
tive. Current consumption increases according to the display contents and panel load.
lCD current consumption-load characteristic
When a load is connected to the V
C3
pin only
V
DD
= 3.6V, Ta = 25°C, Typ. value
0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
4
8
12
16
20
-I
VC3
[µA]
I
LCD1
/I
LCD2
[
µ
A]
VCSEL = 0
VCSEL = 1
a/D Converter Characteristics
29.10
analog characteristics
Unless otherwise specified: V
DD
= AV
DD
= 1.8 to 3.6V, V
SS
= 0V, Ta = -25 to 70
°
C, ADST[2:0] = 0x7 (9 cycles)
item
Symbol
Condition
Min.
Typ.
Max.
unit
Resolution
–
10
bits
A/D conversion clock
f
ADCLK
16
2000
kHz
Sampling rate
*
1
f
SMP
0.8
100
ksps
Zero-scale error
E
ZS
±
3
LSB
Full-scale error
E
FS
±
3
LSB
Integral linearity error
*
2
E
INL
AV
DD
= 2.7 to 3.6 V
±
1.5
LSB
AV
DD
= 1.8 to 3.6 V
±
2.0
LSB
Differential linearity error
E
DNL
±
1.0
LSB
Analog input resistance
R
AIN
11
k
W
Analog input capacitance
C
AIN
20
pF
*
1 Condition for Max. value: A/D converter clock frequency f
ADCLK
= 2MHz. Condition for Min. value: A/D converter clock frequency
f
ADCLK
= 16kHz.
*
2 Integral linearity error is measured at the end point line.
a/D converter current consumption
Unless otherwise specified: V
DD
= AV
DD
= 1.8 to 3.6V, V
SS
= 0V, Ta = 25
°
C, ADST[2:0] = 0x7 (9 cycles), PCKEN[1:0] = 0x3 (ON),
A
IN
= AV
DD
/2V
item
Symbol
Condition
Min.
Typ.
Max.
unit
A/D converter operating current
*
1
I
ADC
V
DD
= AV
DD
= 3.6V, sampling rate = 100ksps
200
350
µA
*
1 This value is added to the current consumption in HALT mode (only when PCKEN[1:0] = 0x3 (ON)) or current consumption during
execution when the A/D converter is active.