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21 ELECTRICAL CHARACTERISTICS
S1C17M20/M21/M22/M23/M24/M25
Seiko Epson Corporation
21-13
TECHNICAL MANUAL (Rev. 1.0)
RFC reference/sensor oscillation frequency-
RFC reference/sensor oscillation current
temperature characteristic
consumption-frequency characteristic
R
REF
/R
SEN
= 100 k
W
, C
REF
= 1,000 pF, Typ. value
C
REF
= 1,000 pF, Ta = 25
°
C, Typ. value
-50
20
18
16
14
12
10
8
6
4
2
0
-25
0
25
50
75
100
Ta [
°
C]
f
RFCLK
[kHz]
V
DD
= 5.5 V
3.6 V
1.8 V
1
10
100
1,000
1,600
1,400
1,200
1,000
800
600
400
200
0
f
RFCLK
[kHz]
I
RFC
[µA]
3.6 V
1.8 V
V
DD
= 5.5 V
21.13 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
= 2,000 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.