19 ELECTRICAL CHARACTERISTICS
S1C17M12/M13 TECHNICAL MANUAL
Seiko Epson Corporation
19-11
(Rev. 1.2)
19.12 12-bit A/D Converter (ADC12A) Characteristics
Unless otherwise specified: V
DD
= 1.8 to 5.5 V, VREFAn = 1.8 to 5.5 V, V
SS
= 0 V, Ta = -40 to 85 °C,
ADC12_nTRG.SMPCLK[2:0] bits = 0x3 (7cycles)
Item
Symbol
Condition
V
DD
Min.
Typ.
Max. Unit
VREFAn voltage range
V
REFA
1.8
–
V
DD
V
A/D conversion clock
frequency
f
CLK_ADC12A
16
–
2,200 kHz
Sampling rate
*
1
f
SMP
–
–
100
ksps
Integral nonlinearity
*
2
INL
V
DD
= VREFAn
*
3
–
–
±
3
LSB
Differential nonlinearity
DNL
V
DD
= VREFAn
*
3
–
–
±
3
LSB
Zero-scale error
ZSE
V
DD
= VREFAn
*
3
–
–
±
5
LSB
Full-scale error
FSE
V
DD
= VREFAn
*
3
–
–
±
5
LSB
Analog input resistance
R
ADIN
–
–
4
k
W
Analog input capacitance C
ADIN
–
–
30
pF
A/D converter circuit
current
I
ADC
ADC12_nCFG.VRANGE[1:0] bits = 0x3,
V
DD
= V
REFA
, ADIN = V
REFA
/2, f
SMP
= 100 ksps,
Ta = 25 °C
3.6 V
–
380
670
µA
ADC12_nCFG.VRANGE[1:0] bits = 0x2,
V
DD
= V
REFA
, ADIN = V
REFA
/2, f
SMP
= 100 ksps,
Ta = 25 °C
4.8 V
–
230
390
µA
ADC12_nCFG.VRANGE[1:0] bits = 0x1,
V
DD
= V
REFA
, ADIN = V
REFA
/2, f
SMP
= 100 ksps,
Ta = 25 °C
5.5 V
–
210
350
µA
*
1 The Max. value is the value when the A/D conversion clock frequency f
CLK_ADC12A
= 1,000 kHz.
*
2 Integral nonlinearity is measured at the end point line.
*
3 The error will be increased according to the potential difference between V
DD
and VREFAn.
A/D converter current consumption-
power supply voltage characteristic
V
DD
= V
REFA
, ADIN = V
REFA
/2, f
SMP
= 100 ksps, Ta = 25 °C, Typ. value
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
1,000
900
800
700
600
500
400
300
200
100
0
V
DD
= V
REFA
[
V
]
I
ADC
[
µ
A]
0x3
0x2
0x1
ADC12_nCFG.VRANGE[1:0] bits =