C515A Datasheet, PDF (46/58 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C515A
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
Symbol
Analog input voltage
V_AIN
Sample time
t_S
Conversion cycle time t_ADCC
Total unadjusted error TUE
Internal resistance of
R_AREF
reference voltage source
Internal resistance of
analog source
R_ASRC
ADC input capacitance C_AIN
Limit Values Unit
min. max.
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
–
t_S / 500 kΩ
– 0.8
–
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
46
1997-10-01