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AD5541ABCPZ Arkusz danych(PDF) 17 Page - Analog Devices

Numer części AD5541ABCPZ
Szczegółowy opis  2.7 V to 5.5 V, Serial-Input, Voltage-Output, 16-/12-Bit nanoDACs in LFCSP
PDF  24 Pages
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Strona internetowa  http://www.analog.com
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AD5541ABCPZ Arkusz danych(HTML) 17 Page - Analog Devices

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Preliminary Technical Data
AD5541A/AD5542A/AD5512AA
Rev. P
rA | Page 17 of 24
APPLICATIONS INFORMATION
OPTOCOUPLER INTERFACE
The digital inputs of the AD5541A/AD5542A/AD5512A are
Schmitt-triggered so that they can accept slow transitions on the
digital input lines. This makes these parts ideal for industrial
applications where it may be necessary to isolate the DAC from
the controller via optocouplers. Figure 37 illustrates such an
interface.
10kΩ
10µF
0.1µF
VDD
VOUT
VDD
SCLK
POWER
10kΩ
VDD
CS
CS
DIN
GND
SCLK
10kΩ
VDD
DIN
5V
REGULATOR
AD5541/AD5542
Figure 37. AD5541/AD5542 in an Optocoupler Interface
DECODING MULTIPLE AD5541/AD5542s
The CS pin of the AD5541/AD5542 can be used to select one of
a number of DACs. All devices receive the same serial clock and
serial data, but only one device receives the CS signal at any one
time. The DAC addressed is determined by the decoder. There is
some digital feedthrough from the digital input lines. Using a
burst clock minimizes the effects of digital feedthrough on the
analog signal channels. Figure 38 shows a typical circuit.
AD5541/AD5542
CS
DIN
SCLK
VOUT
AD5541/AD5542
CS
DIN
SCLK
VOUT
AD5541/AD5542
CS
DIN
SCLK
VOUT
AD5541/AD5542
CS
DIN
SCLK
VOUT
VDD
DGND
EN
CODED
ADDRESS
SCLK
DIN
ENABLE
DECODER
Figure 38. Addressing Multiple AD5541/AD5542s



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