C515A_9708 Datasheet, PDF (166/182 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Device Specifications
C515A
10.3 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
T_A = – 40 to 125 °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-C515A
for the SAF-C515A
for the SAH-C515A
for the SAK-C515A
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 Limit Values Unit
min. max.
V_AIN
t_S
t_ADCC
T_UE
R_AREF
V_AGND
–
–
–
–
V_AREF
16 × t_IN
8 × t_IN
96 × t_IN
48 × t_IN
±2
V
ns
ns
LSB
t_ADC / 250 kΩ
–1
R_ASRC
–
t_S / 500 kΩ
– 0.8
C_AIN
–
50
pF
Test Condition
1)
Prescaler ÷ 8
Prescaler ÷ 4 ²⁾
Prescaler ÷ 8
Prescaler ÷ 4 ³⁾
V_SS + 0.5 V ≤ V_IN ≤ V_CC – 0.5 V 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
÷8
1
÷4
0
t_ADC
8 × t_IN
4 × t_IN
t_S
16 × t_IN
8 × t_IN
Further timing conditions : t_ADC min = 500 ns
t_IN = 2 / f_OSC = 2 t_CLCL
t_ADCC
96 × t_IN
48 × t_IN
Semiconductor Group
10-5
1997-08-01