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ADuM1241 Datasheet Download - Analog Devices

Номер произв ADuM1241
Описание (ADuM1240 - ADuM1246) Dual-Channel Digital Isolators
Производители Analog Devices
логотип Analog Devices логотип 

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ADuM1241 Даташит, Описание, Даташиты
Data Sheet
Micropower, Dual-Channel Digital Isolators
ADuM1240/ADuM1241/ADuM1245/ADuM1246
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Ultralow power operation
3.3 V operation
16 µA per channel maximum quiescent current, refresh
enabled
0.3 µA per channel typical quiescent current, refresh
disabled
148 µA/Mbps per channel typical dynamic current
2.5 V operation
8 µA per channel maximum quiescent current, refresh
enabled
0.1 µA per channel typical quiescent current, refresh
disabled
116 µA/Mbps per channel typical dynamic current
Small, 20-lead SSOP package
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)
3750 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 = 849 V peak
APPLICATIONS
General-purpose, low power, multichannel isolation
1 MHz low power SPI
4 mA to 20 mA loop process control
GENERAL DESCRIPTION
The ADuM1240/ADuM1241/ADuM1245/ADuM12461 are
micropower, dual-channel digital isolators based on the Analog
Devices, Inc., iCoupler® technology. Combining high speed CMOS
and monolithic air core transformer technologies, these isolation
components provide outstanding performance characteristics supe-
rior to alternatives, such as optocoupler devices, yet consume
extremely low power.
Packaged in a 20-lead SSOP, this series of dual, 3.75 kV rms
digital isolation devices operate with supplies as low as 2.25 V
and typically consume a minimal current of less than 6 µA per
channel at data rates below 20 kbps, a fraction of the power of
comparable isolators at comparable data rates (up to 2 Mbps).
In addition, all models provide low pulse width distortion (<8 ns)
VDD1 1
GND1 2
NIC 3
ADuM124x
20 VDD2
19 GND2
18 NIC
NIC 4
17 NIC
VIA/VOA 5
ENCODE
DECODE
16 VOA/VIA
VIB 6
EN1 7
NIC 8
NIC 9
GND1 10
ENCODE
DECODE
15 VOB
14 EN2
13 NIC
12 NIC
11 GND2
Figure 1.
and an input glitch filter for extraneous noise disturbance protec-
tion. All models operate with an independent supply voltage on
either side (between 2.25 V and 3.6 V), providing compatibility
with lower voltage systems and enabling voltage level translation
functionality across the isolation barrier. In the absence of input
power, the products default to a predetermined output logic state:
the ADuM1240 and ADuM1241 default to high output, and the
ADuM1245 and ADuM1246 default to low output.
PRODUCT HIGHLIGHTS
1. Microwatt Power. These 3.75 kV digital isolators consume
less than 15 μW per channel quiescent and 950 μW per
channel at 2 Mbps.
2. Low Supply Operation. Supports power supply voltages down
to 2.25 V.
3. iCoupler Technology. Patented Analog Devices technology
combining high speed CMOS and monolithic air core
transformer technologies.
1000
100
10
ENx = 0
1 ENx = 1
0.1
0.1
1
10
100
1000
10000
DATA RATE (kbps)
Figure 2. Typical Total Supply Current (IDD1 + IDD2) 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
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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ADuM1241 Даташит, Описание, Даташиты
ADuM1240/ADuM1241/ADuM1245/ADuM1246
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—3.3 V Operation ............................ 3
Electrical Characteristics—2.5 V Operation ............................ 4
Electrical Characteristics—VDD1 = 3.3 V, VDD2 = 2.5 V
Operation....................................................................................... 6
Electrical Characteristics—VDD1 = 2.5 V, VDD2 = 3.3 V
Operation....................................................................................... 6
Package Characteristics ............................................................... 7
Regulatory Information............................................................... 7
Insulation and Safety Related Specifications ............................ 7
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
Insulation Characteristics............................................................ 8
Recommended Operating Conditions .......................................8
Absolute Maximum Ratings ........................................................9
Continuous Working Voltage ......................................................9
ESD Caution...................................................................................9
Pin Configurations and Function Descriptions ......................... 10
Truth Tables................................................................................. 12
Typical Performance Characteristics ........................................... 13
Applications Information .............................................................. 16
PCB Layout ................................................................................. 16
Propagation Delay Related Parameters ................................... 16
DC Correctness and Low Power Operation ........................... 16
Magnetic Field Immunity ......................................................... 17
Power Consumption .................................................................. 18
Insulation Lifetime ..................................................................... 18
Packaging and Ordering Information ......................................... 19
Outline Dimensions................................................................... 19
Ordering Guide .......................................................................... 19
REVISION HISTORY
12/13—Revision 0: Initial Version
Rev. 0 | Page 2 of 20
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ADuM1241 Даташит, Описание, Даташиты
Data Sheet
ADuM1240/ADuM1241/ADuM1245/ADuM1246
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—3.3 V OPERATION
All typical specifications are at TA = 25°C, VDD1 = VDD2 = 3.3 V. Minimum/maximum specifications apply over the entire recommended
operation range of 3.0 V ≤ VDD1 ≤ 3.6 V, 3.0 V ≤ VDD2 ≤ 3.6 V, and −40°C ≤ TA ≤ +125°C, unless otherwise noted. Switching specifications
are tested with CL = 15 pF, and CMOS signal levels, unless otherwise noted.
Table 1.
Parameter
SWITCHING SPECIFICATIONS
Symbol Min Typ Max Unit
Test Conditions/Comments
Data Rate
Propagation Delay
Change vs. Temperature
Minimum Pulse Width
Pulse-Width Distortion
Propagation Delay Skew1
Channel Matching
Codirectional
Opposing Direction
tPHL, tPLH
PW
PWD
tPSK
tPSKCD
tPSKOD
2 Mbps Within pulse-width distortion (PWD) limit
80 180 ns
50% input to 50% output
200 ps/°C
500 ns Within PWD limit
8 ns |tPLH − tPHL|
10 ns
10 ns
15 ns
1 tPSK is the magnitude of the worst-case difference in tPHL and tPLH that is measured between units at the same operating temperature, supply voltages, and output load within the
recommended operating conditions.
Table 2.
Parameter
SUPPLY CURRENT
ADuM1240/ADuM1245
ADuM1241/ADuM1246
Symbol
IDD1
IDD2
IDD1
IDD2
Min Typ Max Unit Test Conditions/Comments
2 Mbps, no load
366 600
µA
246 375
µA
306 450
µA
306 450
µA
Table 3.
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 )
Symbol Min
Typ Max
Unit
VIH
VIL
VOH
VOL
II
VT+
VT−
ΔVT
UVLO
0.7 VDDx1
VDDx1 − 0.1
VDDx1 − 0.4
−1
0.3 VDDx1
V
V
3.3
3.1
0.0
0.2
+0.01
0.1
0.4
+1
V
V
V
V
µA
1.8 V
1.2 V
0.6 V
1.5 V
IDDI (Q)
IDDO (Q)
IDDI (Q)
IDDO (Q)
4.8
0.8
0.12
0.13
Rev. 0 | Page 3 of 20
10
6
µA
µA
µA
µA
Test Conditions/Comments
IOUTx = −20 µA, VIx = VIxH
IOUTx = −4 mA, VIx = VIxH
IOUTx = 20 µA, VIx = VIxL
IOUTx = 4 mA, VIx = VIxL
0 V ≤ VIx ≤ VDDx1
ENX low
ENX low
ENX high
ENX high
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