Cypress MB90910 Series, Manual

Page: 58 / 64

Document Number: 002-04578 Rev. *A Page 58 of 64
MB90910 Series

About errors
As | AVR

AV
SS
| becomes smaller, values of relative errors grow larger.

At 4.5 V

AV
CC

5.5 V
Minimum sampling time [

s]
(External impedance

0 k

to 20 k

)

At 3.0 V

AV
CC
< 4.5 V
(External impedance

0 k

to 100 k

)
(External impedance

0 k

to 20 k

)

The relationship between external impedance and minimum sampling time
Exter
n
al
im
ped
an
ce
[k

]
(External impedance

0 k

to 100 k

)
Minimum sampling time [

s]
Exter
nal imp
eda
nce [k

]
Minimum sampling time [

s]
Exte
rn
al impe
da
nce [k

]
Minimum sampling time [

s]
Exte
rna
l impe
dan
ce
[k

]
MB90911AS
MB90F912BS
100
90
80
70
60
50
40
30
20
10
0
0 5 10 1 2
3 4
6 7
8
9
MB90V950AMAS
MB90911AS
MB90F912BS
20
18
16
14
12
10
8
6
4
2
0
0
5
1 2 3
4
MB90V950AMAS
MB90911AS
MB90F912BS
100
90
80
70
60
50
40
30
20
10
0
0 5 10 1 2
3 4
6 7
8
9
MB90V950AMAS
MB90911AS
MB90F912BS
20
18
16
14
12
10
8
6
4
2
0
0
5
1 2 3
4
MB90V950AMAS
Minimum sampling time [

s](4.5 V

AVcc

5.5 V)
External impedance [k

] 5 10 50
MB90911AS/MB90F912BS 0.54 0.84 3.22
MB90V950AMAS 0.56 0.94 3.93
Minimum sampling time [

s] (3.0 V

AVcc

4.5 V)
External impedance [k

] 5 10 50
MB90911AS/MB90F912BS 0.91 1.21 3.59
MB90V950AMAS 1.39 1.77 4.76