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BU2505FV-E2 Folha de dados(PDF) 6 Page - Rohm

Nome de Peças BU2505FV-E2
Descrição Electrónicos  10bit 8ch/10ch D/A Converters
Download  22 Pages
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Fabricante Electrônico  ROHM [Rohm]
Página de início  http://www.rohm.com
Logo ROHM - Rohm

BU2505FV-E2 Folha de dados(HTML) 6 Page - Rohm

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BU2505FV BU2506FV
TSZ02201-0RLR0GZ10140-1-2
© 2015 ROHM Co., Ltd. All rights reserved.
11.Dec.2015 Rev.001
www.rohm.co.jp
TSZ22111・15・001
Cascade Connection
A data output terminal for cascade connection (DO) is available for reducing the number of ports of a CPU if more channels are
needed. The DO terminal can be connected to a data input terminal (DI) of another IC.
However, DO signal transitions (of the IC #1 in the figure below) are triggered by the rising edge of the CLK signal. Also, DI signal
transitions of another IC (#2) should follow the restriction of the data hold time. Therefore, some amount of the delay time is needed
from DO of the IC #1 to DI of the IC #2. The delay time can be made with a circuit with a resister and a capacitor.
Also in some cases, a CLK signal frequency has to be decreased to ensure a margin of the data setup time.
If extra CPU ports are available, it is recommended to connect independent LD signals to each IC.
In this case, more ports of the CPU are needed for the LD signals, but the restrictions described above in the explanation of
the cascade connection don’t have to be considered.
BU2505FV
BU2506FV
DO
LD
CLK
DI
(#2)
BU2505FV
BU2506FV
DO
LD
CLK
DI
(#1)
CPU
LD
CLK
DI
BU2505FV
BU2506FV
(#2)
BU2505FV
BU2506FV
(#1)
LD
CLK
DI
LD
CLK
DI
LD1
LD2
DI
CLK
Data of #2
CLK
DI(#1)
LD
DI(#2)
Data of #2
Data of #1
DO
Data of #2
delay


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