Siemens SAB 80515 Series, User Manual, Page: 252 / 270

Device Specifications
Semiconductor Group 252
A/D Converter Characteristics
V
CC
= 5 V
±
10 %;
V
SS
= 0 V;
V
AREF
=
V
CC
±
5 %;
V
AGND
=
V
SS
±
0.2 V;
V
I ntAREF
–
V
I ntAGND
≥
1 V;
T
A
= 0 to 70 °C for SAB 80C515/80C535
T
A
= – 40 to 85 °C for SAB 80C515/80C535-T40/85
Parameter Symbol Limit values Unit Test condition
min. typ. max.
Analog input voltage
V
AINPUT
V
AGND
–
0.2
–
V
AREF
+
0.2
V 9)
Analog input
capacitance
C
I
– 25 45 pF
7)
Load time t
L
– – 2
t
CY
µ
s –
Sample time
(incl. load time)
t
S
– – 7
t
CY
µ
s –
Conversion time
(incl. sample time)
t
C
– – 13
t
CY
µ
s –
Total unadjusted
error TUE –
±
1
±
2 LSB
V
I ntAREF
=
V
AREF
=
V
CC
V
I ntAGND
=
V
AGND
= V
SS7)
V
AREF
supply current
I
REF
– – 5 mA 8)
Internal reference error V
I nt REFERR
–
±
30 mV 8)
7)
The output impedance of the analog source must be low enough to assure full loading
of the sample capacitance (
C
I ) d uring load time
(t
L ) . After charging of the internal
capacitance (
C
I
) i n the load time
(t
L ) the analog input must be held constant for the rest
of the sample time
(t
S )
8)
The differential impedance r
D
of the analog reference voltage source must be less than
1 k
Ω
at reference supply voltage.
9)
Exceeding these limit values at one or more input channels will cause additional
current which is sinked / sourced at these channels. This may also affect the accuracy
of other channels which are operated within these specifications.
*