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ADuM1446 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADuM1446
Beschreibung Micropower Quad-Channel Digital Isolators
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 25 Seiten
ADuM1446 Datasheet, Funktion
Data Sheet
Micropower
Quad-Channel Digital Isolators
ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
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 and 20-Lead SSOP
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
2500 V rms for 1 minute per UL 1577 QSOP package
3750V rms for 1 minute per UL 1577 SSOP package
CSA Component Acceptance Notice 5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 565 VPEAK QSOP package
VIORM = 849 VPEAK SSOP package
IECEx and ATEX intrinsic safety
Sira 0518 II 1G Ex ia IIC Ga
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 3, 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.
VDD1 1
GND1 2
VIA 3
ADuM144x
ENCODE
VIB 4
ENCODE
QSOP
DECODE
DECODE
VIC/VOC 5
ENCODE
DECODE
VID/VOD 6
EN1 7
GND1 8
ENCODE
DECODE
Figure 1.
16 VDD2
15 GND2
14 VOA
13 VOB
12 VOC/VIC
11 VOD/VID
10 EN2
9 GND2
VDD1 1
GND1 2
VIA 3
ADuM144x
ENCODE
VIB 4
ENCODE
DECODE
DECODE
VIC/VOC 5
ENCODE
DECODE
VID/VOD 6
EN1 7
NIC 8
ENCODE
DECODE
NIC 9
GND1 10
Figure 2.
20 VDD2
19 GND2
18 VOA
17 VOB
16 VOC/VIC
15 VOD/VID
14 EN2
13 NIC
12 NIC
11 GND2
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. 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
ENx = 0
1 ENx = 1
The ADuM1440/ADuM1441/ADuM1442/ADuM1445/
ADuM1446/ADuM1447 family of quad 2.5 kV digital isolation
devices are packaged in a small 16-lead QSOP and 20-lead SSOP,
1 Protected by U.S. Patents 5,952,849, 6,873,065, 7,075,329, 6,262,600. Other patents pending.
0.1
0.1
1
10
100
1000
10000
DATA RATE (kbps)
Figure 3. Typical Total Supply Current per Channel (VDDx = 3.3 V)
Rev. E
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2013–2017 Analog Devices, Inc. All rights reserved.
Technical Support
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ADuM1446 Datasheet, Funktion
ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447
Data Sheet
Table 6. For All Models
Parameter
DC SPECIFICATIONS
Input Threshold
Logic High
Logic Low
Output Voltages
Logic High
Logic Low
Input Current per Channel
Input Switching Thresholds
Positive Threshold Voltage
Negative Going Threshold
Input Hysteresis
Undervoltage Lockout, VDD1 or VDD2
Supply Current per Channel
Quiescent Current
Input Supply
Output Supply
Input (Refresh Off )
Output (Refresh Off )
Dynamic Supply Current
Input
Output
AC SPECIFICATIONS
Output Rise Time/Fall Time
Common-Mode Transient Immunity2
Refresh Rate
Symbol Min
Typ Max
Unit
Test Conditions/Comments
VIH
VIL
VOH
VOL
II
VT+
VT−
ΔVT
UVLO
0.7 VDDx1
VDDx1 − 0.1
VDDx1 − 0.4
−1
0.3 VDDx1
V
V
2.5
2.35
0.0
0.1
+0.01
0.1
0.4
+1
V
V
V
V
µA
1.5 V
1.0 V
0.5 V
1.5 V
IOx = −20 µA, VIx = VIxH
IOx = −4 mA, VIx = VIxH
IOx = 20 µA, VIx = VIxL
IOx = 4 mA, VIx = VIxL
0 V ≤ VIx ≤ VDDx1
IDDI (Q)
IDDO (Q)
IDDI (Q)
IDDO (Q)
IDDI (D)
IDDO (D)
tR/tF
|CM|
fr
25
2.6 3.3
0.5 1.8
0.05
0.05
76
41
2
40
14
µA ENX low
µA ENX low
µA ENX high
µA ENX high
µA/Mbps
µA/Mbps
ns
kV/µs
kbps
10% to 90%
VIx = VDDx1, VCM = 1000 V,
transient magnitude = 800 V
1 VDDx = VDD1 or VDD2.
2 |CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining VOUT > 0.8 VDDx. The common-mode voltage slew rates apply to both rising and
falling common-mode voltage edges.
Rev. E | Page 6 of 25

6 Page









ADuM1446 pdf, datenblatt
ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447
Data Sheet
3.0
SSOP20
2.5
2.0
QSOP16
1.5
1.0
0.5
0
0 50 100 150 200
AMBIENT TEMPERATURE (°C)
Figure 4. Thermal Derating Curve, Dependence of Safety-Limiting Values
with Case Temperature per DIN V VDE V 0884-10
Recommended Operating Conditions
Table 18.
Parameter
Operating Temperature
Supply Voltages1
Input Signal Rise and Fall Times
Symbol
TA
VDD1, VDD2
Value
−40°C to +125°C
2.25 V to 3.6 V
1.0 ms
1 All voltages are relative to their respective grounds. See the DC Correctness
section for information on immunity to external magnetic fields.
Rev. E | Page 12 of 25

12 Page





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