ADUM1440 Datasheet, PDF (1/24 Pages) Analog Devices – Micropower Quad-Channel Digital Isolators

Data Sheet
Micropower
Quad-Channel Digital Isolators
ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447
FEATURES
Ultralow power operation
3.3 V operation (typical)
5.6 µA per channel quiescent current, refresh enabled
0.3 µA per channel quiescent current, refresh disabled
148 µA/Mbps per channel typical dynamic current
2.5 V operation (typical)
3.1 µA per channel quiescent current, refresh enabled
0.1 µA per channel quiescent current, refresh disabled
117 µA/Mbps per channel typical dynamic current
Small, 16-lead QSOP
Bidirectional communication
Up to 2 Mbps data rate (NRZ)
High temperature operation: 125°C
High common-mode transient immunity: >25 kV/µs
Safety and regulatory approvals
UL 1577 Component Recognition Program (pending)
2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A (pending)
VDE Certificate of Conformity (pending)
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 VPEAK
APPLICATIONS
General-purpose, low power multichannel isolation
1 MHz, low power peripheral interface (SPI)
4 mA to 20 mA loop process controls
GENERAL DESCRIPTION
The ADuM1440/ADuM1441/ADuM1442/ADuM1445/
ADuM1446/ADuM1447¹ are micropower, 4-channel digital
isolators based on the Analog Devices, Inc., iCoupler® technology.
Combining high speed, complementary metal oxide semiconductor
(CMOS) and monolithic air core transformer technologies,
these isolation components provide outstanding performance
characteristics superior to the alternatives, such as optocoupler
devices. As shown in Figure 2, in standard operating mode,
when ENx = 0 (internal refresh enabled), the current per channel is
less than 10 µA. When ENx = 1 (internal refresh disabled), the
current per channel drops to less than 1 µA.
FUNCTIONAL BLOCK DIAGRAM
V_DD1 1
GND₁ 2
V_IA 3
ADuM144x
ENCODE
V_IB 4
ENCODE
QSOP
DECODE
DECODE
V_IC/V_OC 5
V_ID/V_OD 6
EN₁ 7
GND₁ 8
ENCODE
ENCODE
DECODE
DECODE
Figure 1.
16 V_DD2
15 GND₂
14 V_OA
13 V_OB
12 V_OC/V_IC
11 V_OD/V_ID
10 EN₂
9 GND₂
The ADuM1440/ADuM1441/ADuM1442/ADuM1445/
ADuM1446/ADuM1447 family of quad 2.5 kV digital isolation
devices are packaged in a small 16-lead QSOP, freeing almost
70% of board space compared to isolators packages in wide
body SOIC packages. The devices withstand high isolation
voltages and meet regulatory requirements, such as UL and
CSA standards (pending). In addition to the space savings, the
ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/
ADuM1447 operate with supplies as low as 2.25 V.
Despite the low power consumption, all models of the ADuM1440/
ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447
provide low, pulse width distortion at <8 ns. In addition, every
model has an input glitch filter to protect against extraneous
noise disturbances.
1000
100
10
EN_x = 0
1
EN_x = 1
0.1
0.1
1
10
100
1000
10000
DATA RATE (Mbps)
Figure 2. Typical Total Supply Current per Channel (VDDx = 3.3 V)
1 _{Protected by U.S. Patents 5,952,849, 6,873,065, 7,075,329, 6,262,600. Other patents pending.}
Rev. 0
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