AD261BND-0 Analog Devices Inc, AD261BND-0 Datasheet

IC LOGIC ISO/3.5KV 0:5IO 22DIP

AD261BND-0

Manufacturer Part Number
AD261BND-0
Description
IC LOGIC ISO/3.5KV 0:5IO 22DIP
Manufacturer
Analog Devices Inc
Series
IsoLogic™r
Datasheet

Specifications of AD261BND-0

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
a
GENERAL DESCRIPTION
The AD261 is designed to isolate five digital control signals
to/from a microcontroller and its related field I/O components.
Six models allow all I/O combinations from five input lines to
five output lines, including combinations in between. Every
AD261 effectively replaces up to five opto-isolators.
Each line of the AD261 has a bandwidth of 20 MHz (min) with
a propagation delay of only 14 ns, which allows for extremely
fast data transmission. Output waveform symmetry is maintained
to within 1 ns of the input so the AD261 can be used to accu-
rately isolate time-based PWM signals.
All field or system output pins of the AD261 can be set to a high
resistance three-state level by use of the two enable pins. A field
output three-stated offers a convenient method of presetting
logic levels at power-up by use of pull-up/down resistors. Sys-
tem side outputs being three-stated allows for easy multiplexing
of multiple AD261s.
The isolation barrier of the AD261 B Grade is 100% tested
as high as 3.5 kV rms (system to field). The barrier design also
provides excellent common-mode transient immunity from
10 kV/ s common-mode voltage excursions of field side termi-
nals relative to the system side, with no false output triggering
on either side.
Each output is updated within nanoseconds by input logic tran-
sitions, the AD261 also has a continuous output update feature
that automatically updates each output based on the dc level of
the input. This guarantees the output is always valid 10 s after
a fault condition or after the power-up reset interval.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Isolation Test Voltage: To 3.5 kV rms
Five Isolated Logic Lines: Available in Six I/O Configurations
Logic Signal Bandwidth: 20 MHz (min)
CMV Transient Immunity: 10 kV/ s min
Waveform Edge Transmission Symmetry:
Field and System Output Enable/Three-State Functions
Performance Rated Over –25 C to +85 C
UL1950, IEC950, EN60950 Certification (VDE, CE, Pending)
APPLICATIONS
PLC/DCS Analog Input and Output Cards
Communications Bus Isolation
General Data Acquisition Applications
IGBT Motor Drive Controls
High Speed Digital I/O Ports
1 ns
PRODUCT HIGHLIGHTS
Six Isolated Logic Line I/O Configurations Available: The
AD261 is available in six pin-compatible versions of I/O con-
figurations to meet a wide variety of requirements.
Wide Bandwidth with Minimal Edge Error: The AD261
affords extremely fast isolation of logic signals due to its 20 MHz
bandwidth and 14 ns propagation delay. It maintains a wave-
form input-to-output edge transition error of typically less than
3.5 kV rms Test Voltage Isolation Rating: The AD261
B Grade is rated to operate at 1.25 kV rms and is 100% pro-
duction tested at 3.5 kV rms, using a standard ADI test method.
High Transient Immunity: The AD261 rejects common-
mode transients slewing at up to 10 kV/ s without false trigger-
ing or damage to the device.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
1 ns (total) for positive vs. negative transition.
ENABLE
5V RTN
+5V dc
FLD
FLD
FLD
F0
F1
F2
F3
F4
High Speed, Logic Isolator
17
16
15
FUNCTIONAL BLOCK DIAGRAM
+5V dc
5Vdc RTN
FIELD
World Wide Web Site: http://www.analog.com
D
E
D
E
LATCH
LATCH
TYPICAL MODEL
(AD261-2)
LINE 2
LINE 3
LINE 4
LINE 0
LINE 1
SYSTEM
LATCH
LATCH
LATCH
© Analog Devices, Inc., 1997
D
E
D
E
D
E
5Vdc RTN
+5V dc
AD261
(Continued on page 5)
4
5
2
3
6
7
8
S1
S2
S4
S0
S3
ENABLE
+5V dc
5V RTN
SYS
SYS
SYS

Related parts for AD261BND-0

AD261BND-0 Summary of contents

Page 1

... Six models allow all I/O combinations from five input lines to five output lines, including combinations in between. Every AD261 effectively replaces up to five opto-isolators. Each line of the AD261 has a bandwidth of 20 MHz (min) with a propagation delay of only 14 ns, which allows for extremely fast data transmission ...

Page 2

AD261–SPECIFICATIONS Parameter INPUT CHARACTERISTICS Threshold Voltage Positive Transition ( Negative Transition (V ) T– Hysteresis Voltage ( Input Capacitance ( Input Bias Current ( OUTPUT CHARACTERISTICS 1 Output Voltage High Level (V ...

Page 3

... Description AD261AND-0 0 Inputs, 5 Outputs AD261AND-1 1 Input, 4 Outputs AD261AND-2 2 Inputs, 3 Outputs AD261AND-3 3 Inputs, 2 Outputs AD261AND-4 4 Inputs, 1 Output AD261AND-5 5 Inputs, 0 Outputs AD261BND-0 0 Inputs, 5 Outputs AD261BND-1 1 Input, 4 Outputs AD261BND-2 2 Inputs, 3 Outputs AD261BND-3 3 Inputs, 2 Outputs AD261BND-4 4 Inputs, 1 Output AD261BND-5 5 Inputs, 0 Outputs CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection ...

Page 4

AD261 AD261-0 LATCH F0 LINE 0 LATCH F1 LINE 1 LATCH F2 LINE 2 LATCH F3 LINE 3 LATCH F4 LINE 4 ENABLE 17 FLD + FLD 5V dc RTN 5V RTN 15 FLD FIELD SYSTEM ...

Page 5

... Power consumption, unlike opto-isolators 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 total idle current (each side). The supply current diminishes ...

Page 6

AD261 Logic information is sent across the barrier as “set-hi/set-lo” data that is derived from logic level transitions of the input. At power-up or after a fault condition, an output might not repre- sent the state of the respective channel ...

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