C517A Datasheet, PDF (55/67 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C517A
A/D Converter Characteristics
V_CC = 5 V + 10%, – 15%; V_SS = 0 V
T_A = 0 to 70 °C
T_A = – 40 to 85 °C
T_A = – 40 to 110 °C
4 V ≤ V_AREF ≤ V_CC+0.1 V; V_SS-0.1 V ≤ V_AGND ≤ V_SS+0.2 V
for the SAB-C517A
for the SAF-C517A
for the SAH-C517A
Parameter
Analog input voltage
Sample time
Conversion cycle time
Total unadjusted error
Internal resistance of
reference voltage source
Internal resistance of
analog source
ADC input capacitance
Symbol
V_AIN
t_S
t_ADCC
T_UE
R_AREF
R_ASRC
C_AIN
Limit Values Unit
min. max.
V_AGND
–
–
–
V_AREF
16 x t_IN
8 x t_IN
96 x t_IN
48 x t_IN
±2
V
ns
ns
LSB
–
t_ADC / 250 kΩ
- 0.25
–
t_S / 500 kΩ
- 0.25
–
50
pF
Test Condition
1)
Prescaler ÷ 8
Prescaler ÷ 4 ²⁾
Prescaler ÷ 8
Prescaler ÷ 4 ³⁾
V_SS+0.5V ≤ V_IN ≤ V_CC-0.5V ⁴⁾
t_ADC in [ns] ^{5) 6)}
t_S in [ns] ^{2) 6)}
6)
Notes see next page.
Clock calculation table:
Clock Prescaler ADCL
Ratio
t_ADC
t_S
÷8
1
8 x t_IN 16 x t_IN
÷4
0
4 x t_IN 8 x t_IN
Further timing conditions: t_ADC min = 500 ns
t_IN = 2 / f_OSC = 2 t_CLCL
t_ADCC
96 x t_IN
48 x t_IN
Semiconductor Group
55
1997-10-01