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MC14532BD Datenblatt(PDF) 6 Page - ON Semiconductor

Teilenummer MC14532BD
Bauteilbeschribung  MC14532B_06
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Hersteller  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC14532BD Datenblatt(HTML) 6 Page - ON Semiconductor

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MC14532B
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6
Figure 5. Two MC14532B’s Cascaded for 4−Bit Output
D15 D14 D13 D12 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Q1
Q0
Q2
Q1
Q0
Q2
Q1
Q0
Q2
Q3
GS
3/4 MC14071B
VDD
Ein
Eout
Ein
Eout
Eout = 1"
WITH Din = 0"
Figure 6. Digital to Analog and Analog to Digital Converter
DIGITAL TO ANALOG CONVERSION
The digital eight−bit word to be converted is applied to the
inputs of the MC14512 with the most significant bit at X7
and the least significant bit at X0. A clock input of up to
2.5 MHz (at VDD = 10 V) is applied to the MC14520B.
A compromise between Ibias for the MC1710 and DR be-
tween N and P−channel outputs gives a value of R of 33 k
W.
In order to filter out the switching frequencies, RC should
be about 1.0 ms (if R = 33 k
W, C [ 0.03 mF). The analog 3.0
dB bandwidth would then be dc to 1.0 kHz.
ANALOG TO DIGITAL CONVERSION
An analog signal is applied to the analog input of the
MC1710. A digital eight−bit word known to represent a dig-
itized level less than the analog input is applied to the
MC14512 as in the D to A conversion. The word is increm-
ented at rates sufficient to allow steady state to be reached
between incrementations (i.e. 3.0 ms). The output of the
MC1710 will change when the digital input represents the
first digitized level above the analog input. This word is the
digital representation of the analog word.
ANALOG
OUTPUT
CLOCK
INPUT
ANALOG
INPUT
VDD
X7 X6 X5 X4 X3 X2 X1 X0
MC14512
A
B
C
MC1710
R
C
Z
VDD
VSS
Ein
D0 D1 D2 D3 D4 D5 D6 D7
Q2
Q0
Q1
STOP
WORD
INCREMENTATION
Q2
Q4
Q3
Q1
Q2
Q4
Q3
Q1
CE
R
C
E
R
1/2 MC14520B
1/2 MC14520B
DIGITAL INPUT/OUTPUT
8−BIT WORD
TO BE CONVERTED


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