MC14549 ONSEMI [ON Semiconductor], MC14549 Datasheet - Page 8

• Manufacturer Part Number: MC14549
• Description: Successive Approximation Registers
• Manufacturer: ONSEMI [ON Semiconductor]

Externally Controlled 12–Bit ADC (Figure 5)
simultaneously resets the cascaded second SAR. When Q4
of the first SAR goes high, the second SAR starts
conversion, and the first one stops conversion. EOC
indicates that the parallel data are valid and that the serial
output is complete. Updating the output data is started with
every external control pulse.
In this circuit the external pulse starts the first SAR and
Figure 4. Continuously Cycling 12–Bit ADC
Figure 5. Externally Controlled 12–Bit ADC
MC14549B, MC14559B
http://onsemi.com
8
Additional Motorola Parts for Successive
Approximation ADC
MC1408/1508 converter has eight–bit resolution and is
available
amplifier–comparator block — The MC1407/1507
contains a high speed operational amplifier and a high speed
comparator with adjustable window.
SA–ADCs with an accuracy of up to eight bits, using as the
register one MC14549B or one MC14559B. An additional
CMOS block will be necessary to generate the clock
frequency.
ADC is found in Motorola Application Note AN–716.
Monolithic digital–to–analog converters — The
With these two linear parts it is possible to construct
Additional information on successive approximation
with
6,
7,
and
8–bit
accuracy.
The