Quad-Channel Digital Isolators, 5KV
Preliminary Technical Data
ADuM2400/ADuM2401/ADuM2402
Rev. PrD October 5, 2004
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FEATURES
Low power operation
5 V operation:
1.0 mA per channel max @ 0–2 Mbps
3.5 mA per channel max @ 10 Mbps
31 mA per channel max @ 90 Mbps
3 V operation:
0.7 mA per channel max @ 0–2 Mbps
2.1 mA per channel max @ 10 Mbps
20 mA per channel max @ 90 Mbps
Bidirectional communication
3 V/5 V level translation
High temperature operation: 105°C
High data rate: DC–90 Mbps (NRZ)
Precise timing characteristics:
2 ns max. pulsewidth distortion
2 ns max. channel-to-channel matching
High common-mode transient immunity: > 25 kV/μs
Output enable function
Wide body SOIC 16-lead package
Safety and regulatory approvals (pending)
UL recognition: 5000 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;EN 60950:2000
V
IORM
= 848 V peak
IEC 60601-1
APPLICATIONS
General-purpose, high voltage, multichannel isolation
Medical Equipment
Motor Drives
Power Supplies
GENERAL DESCRIPTION
The ADuM240x are four-channel digital isolators based on
Analog Devices’ iCoupler® technology. Combining high speed
CMOS and monolithic air core transformer technology, these
isolation components provide outstanding performance
characteristics superior to alternatives such as optocoupler
devices. In comparison to the 2.5KV ADuM140x product
family, ADuM240x models have increased insulation thickness
to achieve the higher 5.0KV isolation rating.
By avoiding the use of LEDs and photodiodes, iCoupler devices
remove the design difficulties commonly associated with
optocouplers. The typical optocoupler concerns regarding
uncertain current transfer ratios, nonlinear transfer functions,
and temperature and lifetime effects are eliminated with the
simple, iCoupler digital interfaces and stable performance
characteristics. The need for external drivers and other discretes
is eliminated with these iCoupler products. Furthermore,
iCoupler devices run at one-tenth to one-sixth the power
consumption of optocouplers at comparable signal data rates.
The ADuM240x isolators provide four independent isolation
channels in a variety of channel configurations and data rates (see
Ordering Guide). All ADuM240x models operate with the supply
voltage of either side ranging from 2.7 V to 5.5 V, providing
compatibility with lower voltage systems as well as enabling a
voltage translation functionality across the isolation barrier. In
addition, the ADuM240x provides low pulse width distortion (<2
ns for CRWZ grade), and tight channel-to-channel matching (<2
ns for CRWZ grade). Unlike other optocoupler alternatives, the
ADuM240x isolators have a patented refresh feature that ensures
dc correctness in the absence of input logic transitions and during
power-up/power-down conditions.
FUNCTIONAL BLOCK DIAGRAMS
ENCODE DECODE
ENCODE DECODE
ENCODE DECODE
ENCODE DECODE
V
DD1
ND
1
V
IA
V
IB
V
IC
V
ID
NC
ND
1
V
DD2
GND
2
V
OA
V
OB
V
OC
V
OD
V
E2
GND
2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
03786-0-001
Figure 1. ADuM2400 Functional Block Diagram
V
dd1
1
V
dd2
16
GND
1
2
GND
2
15
E1
7
E2
10
GND
1
8
GND
2
9
DECODE
ENCODE
3
14
V
IA
V
OA
DECODE
ENCODE
4
13
V
IB
V
OB
V
IC
5
V
OC
DECODE
ENCODE
6
11
V
OD
V
ID
ENCODE
DECODE
12
Figure 2. ADuM2401 Functional Block Diagram
DECODE
DECODE ENCODE
ENCODE
ENCODE DECODE
ENCODE DECODE
V
DD1
GND
1
V
IA
V
IB
V
OC
V
OD
V
E1
GND
1
V
DD2
GND
2
V
OA
V
OB
V
IC
V
ID
V
E2
GND
2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
03786-0-003
Figure 3. ADuM2402 Functional Block Diagram
