AD261BND-1 Analog Devices Inc, AD261BND-1 Datasheet - Page 5

• Manufacturer Part Number: AD261BND-1
• Description: IC LOGIC ISO/3.5KV 1:4IO 22DIP
• Manufacturer: Analog Devices Inc
• Series: IsoLogic™r

Specifications of AD261BND-1

• Rohs Status: RoHS non-compliant
• Inputs - Side 1/side 2: 2/3
• Number Of Channels: 5
• Isolation Rating: 1250Vrms
• Voltage - Supply: 4 V ~ 5.75 V
• Data Rate: 40MBd
• Propagation Delay: 14ns
• Output Type: Tri-State
• Package / Case: 22-DIP Module
• Operating Temperature: -25°C ~ 85°C

Pin
1
2
3
4
5
6
7
8
9–14
15
16
17
18
19
20
21
22
*Pin function is the same on all models, as shown in the AD261-0 column.
REV. 0
(Continued from page 1)
Field and System Enable Functions: Both the isolated and
nonisolated sides of the AD261 have ENABLE pins that three-
state all outputs. Upon reenabling these pins, all outputs are
updated to reflect the current input logic level.
CE Certifiable: Simply by adding the external bypass capacitors
at the supply pins, the AD261 can attain CE certification in
most applications (to the EMC directive) and conformance to
the low voltage (safety) directive is assured by the EN60950
certification.
ENABLE
5V RTN
+5V dc
AD261-0
S0 (Xmt)
S1 (Xmt)
S2 (Xmt)
S3 (Xmt)
S4 (Xmt)
ENABLE
+5 V dc
5 V RTN
5 V RTN
+5 V dc
ENABLE
F0 (Rcv)
F1 (Rcv)
F2 (Rcv)
F3 (Rcv)
F4 (Rcv)
FLD
FLD
FLD
Table I. Model Number and Pinout Function
F0
F1
F2
F3
F4
17
16
15
SYS
FLD
FLD
SYS
SYS
FLD
+5V dc
5V dc RTN
AD261-1 AD261-2 AD261-3 AD261-4 AD261-5
S0 (Xmt) S0 (Xmt) S0 (Xmt) S0 (Xmt) S0 (Rcv)
S1 (Xmt) S1 (Xmt) S1 (Xmt) S1 (Rcv) S1 (Rcv)
S2 (Xmt) S2 (Xmt) S2 (Rcv) S2 (Rcv) S2 (Rcv)
S3 (Xmt) S3 (Rcv) S3 (Rcv) S3 (Rcv) S3 (Rcv)
S4 (Rcv) S4 (Rcv) S4 (Rcv) S4 (Rcv) S4 (Rcv)
*
*
*
*
*
*
F0 (Rcv) F0 (Rcv) F0 (Rcv) F0 (Rcv) F0 (Xmt)
F1 (Rcv) F1 (Rcv) F1 (Rcv) F1 (Xmt) F1 (Xmt)
F2 (Rcv) F2 (Rcv) F2 (Xmt) F2 (Xmt) F2 (Xmt)
F3 (Rcv) F3 (Xmt) F3 (Xmt) F3 (Xmt) F3 (Xmt)
F4 (Xmt) F4 (Xmt) F4 (Xmt) F4 (Xmt) F4 (Xmt)
FIELD
D
D
E
D
E
D
E
E
LATCH
LATCH
LATCH
LATCH
*
*
*
*
*
*
LINE 2
LINE 4
Not Present
LINE 3
LINE 0
LINE 1
*
*
*
*
*
*
SYSTEM
AD261-4
LATCH
D
E
5V dc RTN
+5V dc
*
*
*
*
*
4
5
2
3
6
7
8
AD261 CONFIGURATIONS
S0
S1
S2
S3
S4
+5V dc
ENABLE
5V RTN
*
*
*
*
*
*
SYS
SYS
SYS
–5–
GENERAL ATTRIBUTES
The AD261 provides five HCMOS compatible isolated logic
lines with
The case design and pin arrangement provides greater than
18 mm spacing between field and system side conductors, pro-
viding CSA/IS and IEC creepage spacing consistent with 750 V
mains isolation.
The five unidirectional logic lines have six possible combina-
tions of “ins” and “outs,” or transmitter/receiver pairs; hence
there are six AD261 part configurations (see Table I).
Each 20 MHz logic line has a Schmidt trigger input and a three-
state output (on the other side of the isolation barrier) and 14 ns of
propagation delay. A single enable pin on either side of the
barrier causes all outputs on that side to go three-state and all
inputs (driven pins) to ignore their inputs and retain their last
known state.
Note: All unused logic inputs (1–5) should be tied either high or low,
but not left floating.
Edge “fidelity,” or the difference in propagation time for rising
and falling edges, is typically less than 1 ns.
Power consumption, unlike opto-isolators, is a function of operat-
ing frequency. Each logic line barrier driver requires about 160 A
per MHz and each receiver 40 A per MHz plus, of course, 4 mA
total idle current (each side). The supply current diminishes
slightly with increasing temperature (about –0.03%/ C).
The total capacitance spanning the isolation barrier is less than
10 pF.
The minimum period of a pulse that can be accurately coupled
across the barrier is about 25 ns. Therefore the maximum
square-wave frequency of operation is 20 MHz.
ENABLE
5V RTN
+5V dc
FLD
FLD
FLD
F0
F1
F2
F3
F4
17
16
15
10 kV/ s common-mode transient immunity.
+5V dc
5V dc RTN
FIELD
D
D
D
D
D
E
E
E
E
E
LATCH
LATCH
LATCH
LATCH
LATCH
LINE 2
LINE 3
LINE 4
LINE 1
LINE 0
SYSTEM
AD261-5
5V dc RTN
+5V dc
AD261
2
3
4
5
6
7
8
S1
S2
S3
S4
+5V dc
S0
ENABLE
5V RTN
SYS
SYS
SYS