SAB80515 Datasheet, PDF (252/270 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller Family

Device Specifications
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_IntAGND ≥ 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 ^–
V_AREF V
9)
– 0.2
+ 0.2
Analog input
capacitance
C_I
–
25 45
pF
7)
Load time
t_L
–
–
2 t_CY µs
–
Sample time
t_S
(incl. load time)
–
–
7 t_CY µs
–
Conversion time
t_C
(incl. sample time)
–
–
13 t_CY µs
–
Total unadjusted
TUE
error
–
±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 ) during 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 kΩ 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
252