5 a/d converter characteristics – Epson S1C33210 User Manual
Page 86
8 ELECTRICAL CHARACTERISTICS
A-72
EPSON
S1C33210 PRODUCT PART
8.5 A/D Converter Characteristics
(Unless otherwise specified: AV
DD
=V
DD
=2.7V to 3.6V, V
SS
=0V, Ta=-40
°
C to +85
°
C, ST[1:0]=11)
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
∗
Resolution
–
–
10
–
bit
Conversion time
–
10
–
625
µ
s
1
Zero scale error
E
ZS
0
2
4
LSB
Full scale error
E
FS
-2
–
2
LSB
Integral linearity error
E
L
-3
–
3
LSB
Differential linearity error
E
D
-3
–
3
LSB
Permissible signal source impedance
–
–
–
5
k
Ω
Analog input capacitance
–
–
–
45
pF
∗
note 1) Indicates the minimum value when A/D clock = 2MHz (maximum clock frequency in 3V system).
Indicates the maximum value when A/D clock = 32 kHz (minimum clock frequency in 3V system).
Note: • Be sure to use as V
DD
= AV
DD
.
• The A/D converter cannot be used when the S1C33210 is used with a 2V power source.
A/D conversion error
V[000]h = Ideal voltage at zero-scale point (=0.5LSB)
V'[000]h = Actual voltage at zero-scale point
V[3FF]h = Ideal voltage at full-scale point (=1022.5LSB)
V'[3FF]h = Actual voltage at full-scale point
1LSB =
1LSB' =
AV
DD
- V
SS
2
10
- 1
V'[3FF]h - V'[000]h
2
10
- 2
V[000]h
(=0.5LSB)
V'[000]h
004
003
002
001
000
V
SS
Zero scale error
Zero scale error E
ZS
=
[LSB]
(V'[000]h - 0.5LSB') - (V[000]h - 0.5LSB)
1LSB
Digital output (hex)
Analog input
Ideal conversion characteristic
Actual conversion characteristic
V[3FF]h (=1022.5LSB)
V'[3FF]h
3FF
3FE
3FD
3FC
3FB
AV
DD
Full scale error
Full scale error E
FS
=
[LSB]
(V'[3FF]h + 0.5LSB') - (V[3FF]h + 0.5LSB)
1LSB
Digital output (hex)
Analog input
Ideal conversion characteristic
Actual conversion characteristic