NLV14549BDWR2G

MC14549B, MC14559B
http://onsemi.com
7
Q7 Q6 Q5
MR
SC
C
S
out
MC14549B
Q4 Q3 Q2 Q1 Q0 EOC
S
out
TO DAC
Q7 Q6 Q5
SC
CS
out
MC14559B
Q4 Q3 Q2 Q1 Q0 EOC
TO DAC
FF
EOC
Figure 4. Continuously Cycling 12−Bit ADC
Externally Controlled 12−Bit ADC (Figure 5)
In this circuit the external pulse starts the first SAR and
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.
Additional Motorola Parts for Successive
Approximation ADC
Monolithic digital−to−analog converters — The
MC1408/1508 converter has eight−bit resolution and is
available with 6, 7, and 8−bit accuracy. The
amplifier−comparator block — The MC1407/1507
contains a high speed operational amplifier and a high speed
comparator with adjustable window.
With these two linear parts it is possible to construct
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.
Additional information on successive approximation ADC
is found in Motorola Application Note AN−716.
Figure 5. Externally Controlled 12−Bit ADC
Q7 Q6 Q5
MR
SC
C
S
out
MC14549B
Q4 Q3 Q2 Q1 Q0 EOC
S
out
TO DAC
Q7 Q6 Q5
SC
CS
out
MC14559B
Q4 Q3 Q2 Q1 Q0 EOC
TO DAC
FF
EOC
MC14549B, MC14559B
http://onsemi.com
8
PACKAGE DIMENSIONS
SOIC−16 WB
CASE 751G−03
ISSUE C
D
14X
B16X
SEATING
PLANE
S
A
M
0.25 B
S
T
16 9
81
h X 45
_
M
B
M
0.25
H8X
E
B
A
e
T
A1
A
L
C
q
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DIMENSIONS D AND E DO NOT INLCUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 TOTAL IN
EXCESS OF THE B DIMENSION AT MAXIMUM
MATERIAL CONDITION.
DIM MIN MAX
MILLIMETERS
A 2.35 2.65
A1 0.10 0.25
B 0.35 0.49
C 0.23 0.32
D 10.15 10.45
E 7.40 7.60
e 1.27 BSC
H 10.05 10.55
h 0.25 0.75
L 0.50 0.90
q 0 7
__
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MC14549B/D
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NLV14549BDWR2G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Registers SUCCESSIVE APPROXIMA
Lifecycle:
New from this manufacturer.
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