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A/D Converter Characteristics
±
= 5 V
10 %; V
V
CC
SS
I ntAGND ≥
V
– V
I ntAREF
Parameter
Analog input voltage
Analog input
capacitance
Load time
Sample time
(incl. load time)
Conversion time
(incl. sample time)
Total unadjusted
error
V
supply current
AREF
Internal reference error
7)
The output impedance of the analog source must be low enough to assure full loading
of the sample capacitance (
capacitance (
) i n the load time
C
I
(t
of the sample time
S )
8)
The differential impedance r D of the analog reference voltage source must be less than
Ω
1 k
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.
Semiconductor Group
CC ±
= 0 V; V
= V
AREF
1 V;
T
= 0 to 70 °C for SAB 80C515/80C535
A
= – 40 to 85 °C for SAB 80C515/80C535-T40/85
T
A
Symbol
min.
V
V
AINPUT
–
C
–
I
–
t
L
–
t
S
–
t
C
–
TUE
–
I
REF
–
V
I nt REFERR
I ) during load time
C
(t
L ) the analog input must be held constant for the rest
SS ±
5 %; V
= V
AGND
Limit values
typ.
max.
–
V
AGND
AREF
0.2
0.2
+
25
45
–
2
t
CY
–
7
t
CY
–
13
t
CY
*
± 1
± 2
–
5
± 30
(t
L ) . After charging of the internal
252
Device Specifications
0.2 V;
Unit
Test condition
V
9)
pF
7)
µs
–
µs
–
µs
–
LSB
V
I ntAREF
V
= V
AREF
V
I ntAGND
= V
V
AGND
mA
8)
mV
8)
=
CC
=
SS 7)
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