參數(shù)資料
型號: EVAL-ADM2481EBZ
廠商: Analog Devices Inc
文件頁數(shù): 5/20頁
文件大小: 0K
描述: BOARD EVAL FOR ADM2481
標準包裝: 1
系列: *
Data Sheet
ADM2481
Rev. A | Page 13 of 20
CIRCUIT DESCRIPTION
ELECTRICAL ISOLATION
In the ADM2481, electrical isolation is implemented on the
logic side of the interface. Therefore, the part has two main
sections: a digital isolation section and a transceiver section (see
Figure 26). Driver input and data enable signals, applied to the
TxD and DE pins, respectively, and referenced to logic ground
(GND1), are coupled across an isolation barrier to appear at the
transceiver section referenced to isolated ground (GND2).
Similarly, the receiver output, referenced to isolated ground in
the transceiver section, is coupled across the isolation barrier
to appear at the RxD pin referenced to logic ground (GND1).
iCoupler Technology
The digital signals are transmitted across the isolation barrier
using iCoupler technology. This technique uses chip-scale
transformer windings to couple the digital signals magnet-
ically from one side of the barrier to the other. Digital inputs
are encoded into waveforms that are capable of exciting the
primary transformer winding. At the secondary winding, the
induced waveforms are then decoded into the binary value that
was originally transmitted.
04
73
6-
0
25
RE
TxD
DECODE
ENCODE
DE
DECODE
ENCODE
RxD
ENCODE
DECODE
ISOLATION
BARRIER
DIGITAL ISOLATION
TRANSCEIVER
D
R
A
VDD1
VDD2
GND1
GND2
B
Figure 26. Digital Isolation and Transceiver Sections
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