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WM5620CD Fiches technique(PDF) 11 Page - Wolfson Microelectronics plc

No de pièce WM5620CD
Description  3 & 5V Quad 8-Bit Voltage Output DAC with Serial Interface
PDF  14 Pages
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Fabricant  WOLFSON [Wolfson Microelectronics plc]
Site Internet  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM5620CD Fiches technique(HTML) 11 Page - Wolfson Microelectronics plc

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Wolfson Microelectronics
11
WM5620L, WM5620
Serial Input Decode
Functional Description (Continued)
A1
A0
DAC
0
0
DACA
0
1
DACB
1
0
DACC
1
1
DACD
D7
D6
D5
D4
D3
D2
D1
D0
Output Voltage
0
0
0
0
0
0
0
0
GND
0
0
0
0
0
0
0
1
(1/256) x Ref (1 + RNG)
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
0
1
1
1
1
1
1
1
(127/256) x Ref (1 + RNG)
1
0
0
0
0
0
0
0
(128/256) x Ref (1 + RNG)
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1
1
1
1
1
1
1
1
(255/256) x Ref (1 + RNG)
Using these inputs individual DACs can be updated using
one 11 bit serial input word and the LOAD pin. Using both
LOAD and LDAC, all or selected DACs can be updated
after an appropriate number of data words have been
inputted. Figures 3 & 4 illustrate operation with the 8 clock
pulses available from some microprocessors. If the data
input is interrupted in this way the clock input must be
held low during the break in clock pulses.
The RNG bit controls the DAC output range. When RNG
= 0 the output is between Vref(A,B,C,D) and GND and
when RNG = 1 the range is between 2 x Vref (A,B,C,D)
and GND.



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