Dual-Channel Isolators with
Integrated DC/DC Converter, 50 mW
ADuM5240/ADuM5241/ADuM5242
GENERAL DESCRIPTION
Preliminary Technical Data
FEATURES
Integrated isolated DC/DC converter
Regulated 5V/10 mA output
The ADuM524x1 are dual-channel digital isolators having an
integrated DC/DC converter. Based on Analog Devices’
iCoupler® technology, the DC/DC converter provides up to
50 mW of regulated, isolated power at +5V. This eliminates the
need for a separate isolated DC/DC converter in low-power
isolated designs. Analog Devices’ chip-scale transformer
iCoupler® technology is used both for the isolation of the logic
signals as well as for the DC/DC converter. The result is a small
form-factor total-isolation solution.
Dual dc-to-10 Mbps (NRZ) signal isolation channels
Narrow body SOIC 8-lead package
High temperature operation: 105°C
Precise timing characteristics:
3 ns maximum pulse-width distortion
3 ns maximum channel-to-channel matching
70 ns maximum propagation delay
High common-mode transient immunity: > 25 kV/μs
Safety and regulatory approvals (pending)
UL recognition
ADuM524x units may be used in combination or with other
iCoupler products to achieve greater channel counts.
2500 V rms for 1 minute per UL 1577
CSA component acceptance notice #5A
VDE certificate of conformity
DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01
DIN EN 60950 (VDE 0805): 2001-12; DIN EN 60950: 2000
VIORM = 425 V peak
The ADuM524x isolators provide two independent isolation
channels in a variety of channel configurations and data rates
(see Ordering Guide) operating off a 5V input supply.
1 Protected by U.S. Patents 5,952,849 6,873,065 and 7,075,329 Other patents
pending.
FUNCTIONAL BLOCK DIAGRAM
rect.
osc.
rect.
osc.
rect.
osc.
1
2
1
2
1
2
8
7
8
7
8
7
VDD
VIA
VISO
VOA
VOB
VDD
VOA
VISO
VIA
VDD
VOA
VISO
VIA
ENCODE
DECODE
DECODE
DECODE
ENCODE
ENCODE
ENCODE
ENCODE
DECODE
DECODE
DECODE
ENCODE
3
4
3
4
3
4
6
5
6
5
6
5
VIB
VOB
VIB
VOB
VIB
GND
GNDISO
GND
GND
GNDISO
GNDISO
Figure 1. ADuM5240 Functional Block
Diagram
Figure 2. ADuM5241 Functional Block
Diagram
Figure 3. ADuM5242 Functional Block
Diagram
Rev. PrN
November 17, 2006
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However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
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