SAB80C515A-5 SIEMENS [Siemens Semiconductor Group], SAB80C515A-5 Datasheet - Page 36

• Manufacturer Part Number: SAB80C515A-5
• Description: 8-Bit CMOS Single-Chip Microcontroller Family
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

5.1
In the SAB 80C515A a new high performance/high speed 8-channel 10-bit A/D-Converter is
implemented. Its successive approximation technique provides 7 s conversion time
(
The major components are shown in figure 5-1.
The comparator is a fully differential comparator for a high power supply rejection ratio and very low
offset voltages. The capacitor network is binary weighted providing 10-bit resolution.
The table below shows the sample time
on
f
12
16
18
Semiconductor Group
f
osc
OSC
f
[MHz]
OSC
= 16 MHz). The conversion principle is upward compatible to the one used in the SAB 80C515.
10-Bit A/D-Converter
and the selected prescaler (see also Bit ADCL in SFR ADCON 1).
Prescaler
8
16
8
16
8
16
T
1.5
0.75
1.0
–
1.125
f
2.0
ADC
S
and the conversion time
[MHz]
5-3
On-Chip Peripheral Components
T
2.67
5.33
2.0
4.0
–
3.555
S
[ s]
T
C
(including
T
(incl.
9.33
18.66
7.0
14.0
–
12.4
T
C
S
), which depend
[ s]
T
S
)