ADUM3441_15 Datasheet, PDF (1/24 Pages) Analog Devices – Quad Channel, High Speed Digital Isolators

Data Sheet
Quad Channel, High Speed
Digital Isolators
ADuM3440/ADuM3441/ADuM3442
FEATURES
Low power operation
5 V operation
1.7 mA per channel maximum @ 0 Mbps to 2 Mbps
68 mA per channel maximum @ 150 Mbps
3.3 V operation
1.0 mA per channel maximum @ 0 Mbps to 2 Mbps
33 mA per channel maximum @ 150 Mbps
Bidirectional communication
3.3 V/5 V level translation
High temperature operation: 105°C
High data rate: dc to 150 Mbps (NRZ)
Precise timing characteristics
5 ns maximum pulse width distortion
5 ns maximum channel-to-channel matching
High common-mode transient immunity: >25 kV/μs
Output enable function
16-lead SOIC wide body package
Safety and regulatory approvals
UL recognition: 2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 V peak
APPLICATIONS
High speed multichannel isolation
SPI interface/data converter isolation
Instrumentation
GENERAL DESCRIPTION
The ADuM344x¹ are four channel, digital isolators based on the
Analog Devices, Inc., iCoupler® technology supporting data rates
up to 150 Mbps. Combining high speed CMOS and monolithic
air core transformer technology, these isolation components
provide outstanding performance characteristics superior to
alternatives such as optocoupler devices.
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 discrete
components is eliminated with these iCoupler products.
1 _{Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329.}
Rev. D
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 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 registered trademarks are the property of their respective owners.
FUNCTIONAL BLOCK DIAGRAMS
V_DD1 1
GND₁ 2
V_IA 3
V_IB 4
ENCODE
ENCODE
ADuM3440 16 V_DD2
15 GND₂
DECODE
14 V_OA
DECODE
13 V_OB
V_IC 5
ENCODE
DECODE
12 V_OC
V_ID 6
NC 7
GND₁ 8
ENCODE
DECODE
11 V_OD
10 V_E2
9 GND₂
Figure 1. ADuM3440 Functional Block Diagram
V_DD1 1
GND₁ 2
V_IA 3
V_IB 4
ENCODE
ENCODE
ADuM3441 16 V_DD2
15 GND₂
DECODE
14 V_OA
DECODE
13 V_OB
V_IC 5
ENCODE
DECODE
12 V_OC
V_OD 6
V_E1 7
GND₁ 8
DECODE
ENCODE
11 V_ID
10 V_E2
9 GND₂
Figure 2. ADuM3441 Functional Block Diagram
V_DD1 1
GND₁ 2
V_IA 3
V_IB 4
ENCODE
ENCODE
ADuM3442 16 V_DD2
15 GND₂
DECODE
14 V_OA
DECODE
13 V_OB
V_OC 5
DECODE
ENCODE
12 V_IC
V_OD 6
V_E1 7
GND₁ 8
DECODE
ENCODE
11 V_ID
10 V_E2
9 GND₂
Figure 3. ADuM3442 Functional Block Diagram
Furthermore, iCoupler devices consume one-tenth to one-sixth
the power of optocouplers at comparable signal data rates.
The ADuM344x isolators provide four independent isolation
channels in a variety of channel configurations (see the
Ordering Guide). The ADuM344x operates with the supply
voltage on either side ranging from 3.0 V to 5.5 V, providing
compatibility with lower voltage systems as well as enabling
voltage translation functionality across the isolation barrier. In
addition, the ADuM344x provides low pulse width distortion
and tight channel-to-channel matching. Unlike other opto-
coupler alternatives, the ADuM344x isolators have a patented
refresh feature that ensures dc correctness in the absence of
input logic transitions and during the power-up/power-down
condition.
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