FEATURES
isoPower integrated, isolated dc-to-dc converter
Regulated 3.3 V or 5 V output
Up to 500 mW output power
16-lead SOIC package with 7.6 mm creepage
High temperature operation: 105°C maximum
Thermal overload protection
Safety and regulatory approvals
UL recognition
2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity (pending)
IEC 60747-5-2 (VDE 0884, Part 2)
VIORM = 560 V peak
FUNCTIONAL BLOCK DIAGRAM
OSC
VDD1
1
GND1
2
15 GNDISO
NC
3
14 NC
RCIN
4
13 VSEL
RCOUT
5
12 NC
RCSEL
6
11 NC
VDD1
7
10 VISO
GND1
8
RECT
REG
ADuM5000
16 VISO
9
GNDISO
07539-001
Data Sheet
2.5 kV, Isolated DC-to-DC Converter
ADuM5000
Figure 1.
APPLICATIONS
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
Power supply startups and gate drives
Isolated sensor interfaces
Industrial PLCs
GENERAL DESCRIPTION
The ADuM50001 is an isolated dc-to-dc converter based on
the Analog Devices, Inc., iCoupler® technology. The dc-to-dc
converter in this device provides regulated, isolated power in
several combinations of input and output voltages as listed in
Table 1.
The Analog Devices chip scale transformer, iCoupler technology,
transfers isolated power in this dc-to-dc converter with up to
33% efficiency. The result is a small form factor, total isolation
solution.
isoPower uses high frequency switching elements to transfer power
through its transformer. Special care must be taken during printed
circuit board (PCB) layout to meet emissions standards. See the
AN-0971 Application Note for board layout recommendations.
Table 1.
Input Voltage (V)
5
5
3.3
Output Voltage (V)
5
3.3
3.3
Output Power (mW)
500
330
200
Higher output power levels are obtained by using the ADuM5000
to augment the power output of ADuM5401, ADuM5402,
ADuM5403, ADuM5404, ADuM520x, and other ADuM5000
iCouplers with isoPower®.
1
Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329.
Rev. B
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2008–2012 Analog Devices, Inc. All rights reserved.
ADuM5000
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Recommended Operating Conditions .......................................6
Applications ....................................................................................... 1
Absolute Maximum Ratings ............................................................7
Functional Block Diagram .............................................................. 1
ESD Caution...................................................................................7
General Description ......................................................................... 1
Pin Configuration and Function Descriptions..............................8
Revision History ............................................................................... 2
Typical Performance Characteristics ..............................................9
Specifications..................................................................................... 3
Applications Information .............................................................. 11
Electrical Characteristics—5 V Primary Input Supply/
5 V Secondary Isolated Supply ................................................... 3
PCB Layout ................................................................................. 11
Electrical Characteristics—3.3 V Primary Input Supply/
3.3 V Secondary Isolated Supply ................................................ 3
EMI Considerations ................................................................... 12
Electrical Characteristics—5 V Primary Input Supply/
3.3 V Secondary Isolated Supply ................................................ 4
Current Limit and Thermal Overload Protection ................. 12
Package Characteristics ............................................................... 5
Regulatory Information ............................................................... 5
Insulation and Safety-Related Specifications ............................ 5
IEC 60747-5-2 (VDE 0884, Part 2):2003-01 Insulation
Characteristics .............................................................................. 6
Start-Up Behavior....................................................................... 11
Thermal Analysis ....................................................................... 12
Power Considerations ................................................................ 12
Increasing Available Power ....................................................... 13
Insulation Lifetime ..................................................................... 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 15
REVISION HISTORY
5/12—Rev. A to Rev. B
Created Hyperlink for Safety and Regulatory Approvals
Entry in Features Section................................................................. 1
11/10—Rev. 0 to Rev. A
Changes to Product Title and Features Section ............................ 1
Changes to Table 6, Minimum External Air Gap (Clearance)
Parameter, Table 7, and Minimum External Tracking
(Creepage) Parameter, Table 7 ........................................................ 5
Changed DIN V VDE V 0884-10 (VDE V 0884-10 Insulation
Characteristics Section to IEC 60747-5-2 (VDE 0884,
Part 2):2003-1 Insulation Characteristics and Table Summary .... 6
Changes to Table 9 ............................................................................ 6
Changes to Table 10 and Table 11 ...................................................7
Changes to Pin 10, Pin 16 Description in Table 12;
Changes to Table 13 ..........................................................................8
Changes to Figure 6 Caption and Figure 9 Caption .....................9
Added Figure 12 and Figure 13; Renumbered Sequentially ..... 10
Added Start-Up Behavior Section ................................................ 11
Changes to EMI Considerations Section and Current Limit
and Thermal Overload Protection Section ................................. 12
Changes to Increasing Available Power Section ......................... 12
Changes to Table 14 and Table 15 ................................................ 13
10/08—Revision 0: Initial Version
Rev. B | Page 2 of 16
Data Sheet
ADuM5000
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/5 V SECONDARY ISOLATED SUPPLY
4.5 V ≤ VDD1 ≤ 5.5 V, VSEL = VISO; each voltage is relative to its respective ground. All minimum/maximum specifications apply over the
entire recommended operating range, unless otherwise noted. All typical specifications are at TA = 25°C, VDD1 = 5.0 V, VISO = 5.0 V, and
VSEL = VISO.
Table 2.
Parameter
DC-TO-DC CONVERTER POWER SUPPLY
Setpoint
Line Regulation
Load Regulation
Output Ripple
Output Noise
Switching Frequency
PWM Frequency
IDD1 Supply Current, Full VISO Load
Maximum Output Supply Current
Efficiency at Maximum Output
Supply Current
IDD1 Supply Current, No VISO Load
Undervoltage Lockout, VDD1 and VISO
Supply
Positive Going Threshold
Negative Going Threshold
Hysteresis
Symbol
Min
Typ
Max
Unit
Test Conditions
VISO
VISO(LINE)
VISO(LOAD)
VISO(RIP)
4.7
5.0
1
1
75
5.4
V
mV/V
%
mV p-p
IISO = 0 mA
IISO = 50 mA, VDD1 = 4.5 V to 5.5 V
IISO = 10 mA to 90 mA
20 MHz bandwidth, CBO = 0.1 µF||10 µF,
IISO = 90 mA
CBO = 0.1 μF||10 μF, IISO = 90 mA
VISO(N)
fOSC
fPWM
IDD1(MAX)
IISO(MAX)
5
200
180
625
290
100
34
IDD1(Q)
4
VUV+
VUV−
VUVH
2.7
2.4
0.3
15
mV p-p
MHz
kHz
mA
mA
%
IISO = 100 mA
VISO > 4.5 V
IISO = 100 mA
mA
IISO = 0 mA
V
V
V
ELECTRICAL CHARACTERISTICS—3.3 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY
3.0 V ≤ VDD1 ≤ 3.6 V, VSEL = GNDISO; each voltage is relative to its respective ground. All minimum/maximum specifications apply over
the entire recommended operating range, unless otherwise noted. All typical specifications are at TA = 25°C, VDD1 = 3.3 V, VISO = 3.3 V,
and VSEL = GNDISO.
Table 3.
Parameter
DC-TO-DC CONVERTER POWER SUPPLY
Setpoint
Line Regulation
Load Regulation
Output Ripple
Output Noise
Switching Frequency
PWM Frequency
IDD1 Supply Current, Full VISO Load
Maximum Output Supply Current
Efficiency at Maximum Output
Supply Current
IDD1 Supply Current, No VISO Load
Undervoltage Lockout, VDD1 and VISO
Supply
Positive Going Threshold
Negative Going Threshold
Hysteresis
Symbol
Min
Typ
Max
Unit
Test Conditions
VISO
VISO(LINE)
VISO(LOAD)
VISO(RIP)
3.0
3.3
1
1
50
3.6
V
mV/V
%
mV p-p
IISO = 0 mA
IISO = 30 mA, VDD1 = 3.0 V to 3.6 V
IISO = 6 mA to 54 mA
20 MHz bandwidth, CBO = 0.1 μF||10 μF,
IISO = 54 mA
CBO = 0.1 μF||10 μF, IISO = 54 mA
VISO(N)
fOSC
fPWM
IDD1(MAX)
IISO(MAX)
5
130
180
625
175
mV p-p
MHz
kHz
mA
mA
%
60
35
IDD1(Q)
3
VUV+
VUV−
VUVH
2.7
2.4
0.3
12
Rev. B | Page 3 of 16
mA
V
V
V
IISO = 60 mA
VISO > 3.0 V
IISO = 60 mA
IISO = 0 mA
ADuM5000
Data Sheet
ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY
4.5 V ≤ VDD1 ≤ 5.5 V, VSEL = GNDISO, each voltage is relative to its respective ground. All minimum/maximum specifications apply over
the entire recommended operating range, unless otherwise noted. All typical specifications are at TA = 25°C, VDD1 = 5.0 V, VISO = 3.3 V,
and VSEL = GNDISO.
Table 4.
Parameter
DC-TO-DC CONVERTER POWER SUPPLY
Setpoint
Line Regulation
Load Regulation
Output Ripple
Output Noise
Switching Frequency
PWM Frequency
IDD1 Supply Current, Full VISO Load
Maximum Output Supply Current
Efficiency at Maximum Output
Supply Current
IDD1 Supply Current, No VISO Load
Undervoltage Lockout, VDD1 and VISO
Supply
Positive Going Threshold
Negative Going Threshold
Hysteresis
Symbol
Min
Typ
Max
Unit
Test Conditions
VISO
VISO(LINE)
VISO(LOAD)
VISO(RIP)
3.0
3.3
1
1
50
3.6
V
mV/V
%
mV p-p
IISO = 0 mA
IISO = 50 mA, VDD1 = 4.5 V to 5.5 V
IISO = 10 mA to 100 mA
20 MHz bandwidth, CBO = 0.1 μF||10 μF,
IISO = 90 mA
CBO = 0.1 μF||10 μF, IISO = 90 mA
VISO(N)
fOSC
fPWM
IDD1(MAX)
IISO(MAX)
5
130
180
625
250
mV p-p
MHz
kHz
mA
mA
%
100
28
IDD1(Q)
3
VUV+
VUV−
VUVH
2.7
2.4
0.3
12
Rev. B | Page 4 of 16
mA
V
V
V
IISO = 100 mA
VISO > 3.0 V
IISO = 100 mA
IISO = 0 mA
Data Sheet
ADuM5000
PACKAGE CHARACTERISTICS
Table 5.
Parameter
RESISTANCE AND CAPACITANCE
Resistance (Input-to-Output) 1
Capacitance (Input-to-Output)1
Input Capacitance 2
IC Junction-to-Ambient Thermal Resistance
Symbol
Min
Typ
Max
Unit
RI-O
CI-O
CI
θJA
1012
2.2
4.0
45
Ω
pF
pF
°C/W
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
TSSD
TSSD-HYS
150
20
°C
°C
Test Conditions
f = 1 MHz
Thermocouple is located at the center of
the package underside; test conducted
on a 4-layer board with thin traces 3
TJ rising
1
This device is considered a 2-terminal device; Pin 1 through Pin 8 are shorted together, and Pin 9 through Pin 16 are shorted together.
Input capacitance is from any input data pin to ground.
3
Refer to the Power Considerations section for thermal model definitions.
2
REGULATORY INFORMATION
The ADuM5000 is approved by the organizations listed in Table 6. Refer to Table 11 and the Insulation Lifetime section for more
information about recommended maximum working voltages for specific cross isolation waveforms and insulation levels.
Table 6.
UL
Recognized under 1577 component
recognition program 1
Single protection, 2500 V rms isolation
voltage
File E214100
1
2
CSA
Approved under CSA Component Acceptance
Notice #5A
Testing was conducted per CSA 60950-1-07
and IEC 60950-1, 2nd Edition at 2.5 kV rated
voltage
Basic insulation at 400 V rms (566 V peak)
working voltage
Reinforced insulation at 250 V rms (353 V peak)
working voltage
File 205078
VDE (Pending)
Certified according to IEC 60747-5-2 (VDE 0884,
Part 2):2003-01 2
Basic insulation, 560 V peak
File 2471900-4880-0001
In accordance with UL 1577, each ADuM5000 is proof tested by applying an insulation test voltage ≥ 3000 V rms for 1 sec (current leakage detection limit = 5 µA).
In accordance with IEC 60747-5-2 (VDE 0884, Part 2):2003-01, each ADuM5000 is proof tested by applying an insulation test voltage ≥ 1050 V peak for 1 sec (partial
discharge detection limit = 5 pC). The asterisk (*) marking branded on the component designates IEC 60747-5-2 (VDE 0884, Part 2):2003-01.
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 7.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Symbol
L(I01)
Value
2500
8.0
Unit
V rms
mm
Minimum External Tracking (Creepage)
L(I02)
7.6
mm
0.017
min
>175
IIIa
mm
Minimum Internal Distance (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
CTI
V
Rev. B | Page 5 of 16
Conditions
1-minute duration
Measured from input terminals to output terminals,
shortest distance through air
Measured from input terminals to output terminals,
shortest distance path along body
Distance through the insulation
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
ADuM5000
Data Sheet
IEC 60747-5-2 (VDE 0884, PART 2):2003-01 INSULATION CHARACTERISTICS
This power module is suitable for reinforced electrical isolation only within the safety limit data. Maintenance of the safety data is ensured
by protective circuits. The asterisk (*) marking branded on the component designates IEC 60747-5-2 (VDE 0884, Part 2):2003-01 approval.
Table 8.
Description
Installation Classification per DIN VDE 0110
For Rated Mains Voltage ≤ 150 V rms
For Rated Mains Voltage ≤ 300 V rms
For Rated Mains Voltage ≤ 400 V rms
Climatic Classification
Pollution Degree per DIN VDE 0110, Table 1
Maximum Working Insulation Voltage
Input-to-Output Test Voltage
Method b1
Conditions
VIORM × 1.875 = VPR, 100% production test, tm = 1 sec,
partial discharge < 5 pC
VIORM × 1.6 = VPR, tm = 60 sec, partial discharge < 5 pC
Method a
After Environmental Tests Subgroup 1
After Input and/or Safety Test
Subgroup 2 and Subgroup 3
Highest Allowable Overvoltage
Safety-Limiting Values
Symbol
Characteristic
Unit
VIORM
I to IV
I to III
I to II
40/105/21
2
560
V peak
VPR
1050
V peak
896
672
V peak
V peak
VTR
4000
V peak
TS
IS1
RS
150
555
>109
°C
mA
Ω
VPR
VIORM × 1.2 = VPR, tm = 60 sec, partial discharge < 5 pC
Transient overvoltage, tTR = 10 sec
Maximum value allowed in the event of a failure
(see Figure 2)
Case Temperature
Side 1 IDD1 Current
Insulation Resistance at TS
VIO = 500 V
Thermal Derating Curve
500
400
300
200
100
0
0
50
100
150
AMBIENT TEMPERATURE (°C)
200
07539-002
SAFE OPERATING VDD1 CURRENT (mA)
600
Figure 2. Thermal Derating Curve, Dependence of Safety-Limiting Values on Case Temperature, per DIN EN 60747-5-2
RECOMMENDED OPERATING CONDITIONS
Table 9.
Parameter
TEMPERATURE 1
Operating Temperature
SUPPLY VOLTAGES 2
VDD1 at VSEL = 0 V
VDD1 at VSEL = 5 V
1
2
Symbol
Min
Max
Unit
TA
−40
+105
°C
VDD1
VDD1
2.7
4.5
5.5
5.5
V
V
Comments
Each voltage is relative to its respective ground
Operation at 105°C requires reduction of the maximum load current as specified in Table 10.
Each voltage is relative to its respective ground.
Rev. B | Page 6 of 16
Data Sheet
ADuM5000
ABSOLUTE MAXIMUM RATINGS
Table 11. Maximum Continuous Working Voltage1
Ambient temperature = 25°C, unless otherwise noted.
Table 10.
Parameter
Storage Temperature (TST)
Ambient Operating Temperature (TA)
Supply Voltages (VDDx, VISO)1
Input Voltage (RCSEL, RCIN, VSEL)1, 2
Output Voltage (RCOUT)1, 2
Average Total Output Current3
IISO
Common-Mode Transients4
Rating
−55°C to +150°C
−40°C to +105°C
−0.5 V to +7.0 V
−0.5 V to VDDI + 0.5 V
−0.5 V to VDDO + 0.5 V
Parameter
AC Voltage
Bipolar Waveform
Max
Unit
Reference Standard
424
V peak
50-year minimum
lifetime
Unipolar Waveform
Basic Insulation
600
V peak
353
V peak
Maximum approved
working voltage per
IEC 60950-1
Maximum approved
working voltage per
IEC 60950-1
600
V peak
353
V peak
Reinforced Insulation
100 mA
−100 kV/µs to +100 kV/µs
1
Each voltage is relative to its respective ground.
VDDI and VDDO refer to the supply voltages on the input and output sides of a
given channel, respectively. See the PCB Layout section.
3
See Figure 2 for maximum rated current values for various temperatures.
4
Refers to common-mode transients across the isolation barrier. Commonmode transients exceeding the absolute maximum ratings may cause
latch-up or permanent damage.
2
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
DC Voltage
Basic Insulation
Reinforced Insulation
1
Maximum approved
working voltage per
IEC 60950-1
Maximum approved
working voltage per
IEC 60950-1
Refers to continuous voltage magnitude imposed across the isolation
barrier. See the Insulation Lifetime section for more details.
ESD CAUTION
Rev. B | Page 7 of 16
ADuM5000
Data Sheet
VDD1 1
16
VISO
GND1 2
15
GNDISO
ADuM5000
14
NC
TOP VIEW
(Not to Scale)
13
VSEL
12
NC
RCSEL 6
11
NC
VDD1 7
10
VISO
GND1 8
9
GNDISO
NC 3
RCIN 4
RCOUT 5
07539-003
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
NC = NO CONNECT
Figure 3. Pin Configuration
Table 12. Pin Function Descriptions
Pin No.
1, 7
Mnemonic
VDD1
2, 8
GND1
3, 11, 12, 14
4
NC
RCIN
5
RCOUT
6
RCSEL
9, 15
GNDISO
10, 16
VISO
13
VSEL
Description
Primary Supply Voltage 3.0 V to 5.5 V. Pin 1 and Pin 7 are internally connected to each other, and it is recommended that both pins be externally connected to a common power source.
Ground 1. Ground reference for the primary side of the converter. Pin 2 and Pin 8 are internally connected to
each other, and it is recommended that both pins be connected to a common ground.
No Internal Connection.
Regulation Control Input. In slave power configuration (RCSEL = low), this pin is connected to the RCOUT pin of a
master isoPower device, or tied low to disable the converter. In master/standalone mode (RCSEL = high), this pin
has no function. This pin is weakly pulled to low. In noisy environments, it should be tied to low or to a PWM
control source. Note that this pin must not be tied high if RCSEL is low; this combination causes excessive voltage
on the secondary side of the converter, damaging the ADuM5000 and possibly the devices that it powers.
Regulation Control Output. In master power configuration, this pin is connected to the RCIN pin of a slave
isoPower device to allow the ADuM5000 to regulate additional devices.
Control Input. Sets either self-regulation/master mode (RCSEL high) or slave mode (RCSEL low). This pin is weakly
pulled to the high state. In noisy environments, tie this pin either high or low.
Ground Reference for the Secondary Side of the Converter. Pin 9 and Pin 15 are internally connected to each
other, and it is recommended that both pins be connected to a common ground.
Secondary Supply Voltage Output for External Loads, 3.3 V (VSEL low) or 5.0 V (VSEL high). 5.0 V output functionality
is not guaranteed for a 3.3 V primary supply input. Pin 10 and Pin 16 are internally connected to each other and
connecting both externally is recommended.
Output Voltage Selection. When VSEL = VISO, the VISO setpoint is 5.0 V. When VSEL = GNDISO, the VISO setpoint is 3.3 V.
This pin is weakly pulled to high. In noisy environments, tie this pin either high or low. In slave regulation
mode, this pin has no function.
Table 13. Truth Table (Positive Logic) 1
RCSEL
Input
H
H
H
H
L
L
L
RCIN
Input
X
X
X
X
RCOUT(EXT)
L
H
RCOUT
Output
PWM 2
PWM2
PWM2
PWM2
RCIN
L
H
VSEL
Input
H
L
H
L
X
X
X
VDD1
Input
5.0 V
5.0 V
3.3 V
3.3 V
X3
X
X
VISO
Output
5.0 V
3.3 V
5.0 V
3.3 V
X
0V
X
Operation
Master mode operation, self regulating.
Master mode operation, self regulating.
This configuration is not recommended due to poor efficiency.
Master mode operation, self regulating.
Slave mode, RCOUT(EXT) supplied by a master isoPower device.
Low power mode, converter disabled.
Note that this combination of RCIN and RCSEL is prohibited. Damage occurs
on the secondary side of the converter due to excess output voltage at
VISO. RCIN must be low, or it must be connected to a PWM signal from a
master isoPower part.
1
X = don’t care.
PWM refers to the regulation control signal. This signal is derived from the secondary side regulator or from the RCIN input, depending on the value of RCSEL.
3
VDD1 must be common between all isoPower devices being regulated by a master isoPower part.
2
Rev. B | Page 8 of 16
Data Sheet
ADuM5000
TYPICAL PERFORMANCE CHARACTERISTICS
3.5
35
EFFICIENCY (%)
30
25
20
15
5V IN/5V OUT
3.3V IN/3.3V OUT
5V IN/3.3V OUT
10
5
3.0
2.5
2.0
1.5
1.0
0.04
0.06
0.08
0.10
0
3.0
07539-004
0.02
OUTPUT CURRENT (A)
IDD
0.5
0
0
POWER
Figure 4. Typical Power Supply Efficiency in All Supported Power
Configurations
3.5
4.0
4.5
VDD1 (V)
5.0
5.5
6.0
Figure 7. Typical Short-Circuit Input Current and Power
vs. VDD1 Supply Voltage
OUTPUT VOLTAGE
(500mV/DIV)
0.12
0.08
5V IN/5V OUT
3.3V IN/3.3V OUT
5V IN/3.3V OUT
0.04
0
0
0.05
0.10
0.15
0.20
INPUT CURRENT (A)
0.25
10% LOAD
07539-005
0.02
0.30
07539-007
90% LOAD
0.06
DYNAMIC LOAD
OUTPUT CURRENT (A)
0.10
(100µs/DIV)
Figure 8. Typical VISO Transient Load Response, 5 V Output,
10% to 90% Load Step
Figure 5. Typical Isolated Output Supply Current vs. External Load
in All Supported Power Configurations
OUTPUT VOLTAGE
(500mV/DIV)
1.0
0.9
0.7
0.6
0.5
0.4
0.3
5V IN/5V OUT
3.3V IN/3.3V OUT
5V IN/3.3V OUT
0.2
0
0
0.02
0.04
0.06
IISO (A)
0.08
0.10
07539-122
0.1
90% LOAD
10% LOAD
07539-008
DYNAMIC LOAD
POWER DISSIPATION (W)
0.8
(100µs/DIV)
Figure 6. Typical Total Power Dissipation vs. Isolated Output Supply Current
in All Supported Power Configurations
Rev. B | Page 9 of 16
Figure 9. Typical VISO Transient Load Response, 3 V Output,
10% to 90% Load Step
07539-006
IDD1 (A) AND POWER DISSIPATION (W)
40
ADuM5000
Data Sheet
7
–40
10% LOAD
BW = 20MHz
6
5
–60
VISO (V)
–70
4
90% LOAD
3
–80
2
–90
07539-009
1
–100
0
0.5
1.0
1.5
2.0
2.5
TIME (µs)
3.0
3.5
07539-012
RIPPLE, VISO = 5V (mV)
–50
0
–1
4.0
Figure 10. Typical Output Voltage Ripple at 90% Load, VISO = 5 V
0
1
TIME (ms)
2
3
Figure 12. Typical Output Voltage Start-Up Transient
at 10% and 90% Load, VISO = 5 V
5
–20
BW = 20MHz
4
10% LOAD
–40
VISO (V)
–50
3
90% LOAD
2
–60
1
07539-010
–70
–80
0
0.5
1.0
1.5
2.0
2.5
TIME (µs)
3.0
3.5
4.0
Figure 11. Typical Output Voltage Ripple at 90% Load, VISO = 3.3 V
0
–1.0
07539-013
RIPPLE, VISO = 3.3V (mV)
–30
–0.5
0
0.5
1.0
1.5
TIME (ms)
2.0
2.5
Figure 13. Typical Output Voltage Start-Up Transient
at 10% and 90% Load, VISO = 3.3 V
Rev. B | Page 10 of 16
3.0
Data Sheet
ADuM5000
APPLICATIONS INFORMATION
The ADuM5000 provides a regulation control output (RCOUT)
signal that can be connected to other isoPower devices. This feature
allows a single regulator to control multiple power modules without
contention. When auxiliary power modules are present, the VISO
pins can be connected together to work as a single supply. Because
there is only one feedback control path, the supplies work together
seamlessly. The ADuM5000 can be a source of regulation control,
as well as being controlled by another isoPower device.
There is an undervoltage lockout (UVLO) with hysteresis in the
VDD1 input protection circuit. When the input voltage rises above
the UVLO threshold, the dc-to-dc converter becomes active.
The input voltage must be decreased below the turn-on threshold
by the hysteresis value to disable the converter. This feature has
many benefits in the power-up sequence of the converter, such
as ensuring that the system supply rises to a minimum level
before the ADuM5000 demands current. It also prevents any
voltage drop due to converter current from turning the supply
off and possibly oscillating.
PCB LAYOUT
The ADuM5000 digital isolator is a 0.5 W isoPower integrated
dc-to-dc converter that requires no external interface circuitry
for the logic interfaces. Power supply bypassing is required at
the input and output supply pins (see Figure 14).
The power supply section of the ADuM5000 uses a 180 MHz
oscillator frequency to pass power efficiently through its chip
scale transformers. In addition, the normal operation of the
data section of the iCoupler introduces switching transients
on the power supply pins. Bypass capacitors are required for
several operating frequencies. Noise suppression requires a low
inductance, high frequency capacitor, whereas ripple suppression
and proper regulation require a large value capacitor. These
capacitors are most conveniently connected between Pin 1 and
Pin 2 for VDD1, and between Pin 15 and Pin 16 for VISO.
To suppress noise and reduce ripple, a parallel combination of
at least two capacitors is required. The recommended capacitor
values are 0.1 μF and 10 μF. Best practice recommends using a
very low inductance ceramic capacitor, or its equivalent, for the
smaller value. The total lead length between both ends of the
capacitor and the input power supply pin should not exceed
10 mm. Consider bypassing between Pin 1 and Pin 8 and
between Pin 9 and Pin 16 unless both common ground pins
are connected together close to the package.
VDD1
VISO
GND1
GNDISO
NC
NC
RCIN
VSEL
RCOUT
NC
RCSEL
NC
VDD1
VISO
GND1
GNDISO
07539-011
The dc-to-dc converter section of the ADuM5000 works on
principles that are common to most switching power supplies.
It has a secondary side controller architecture with isolated pulsewidth modulation (PWM) feedback. VDD1 power is supplied to
an oscillating circuit that switches current into a chip scale air
core transformer. Power transferred to the secondary side is
rectified and regulated to either 3.3 V or 5 V. The secondary (VISO)
side controller regulates the output by creating a PWM control
signal that is sent to the primary (VDD1) side by a dedicated
iCoupler data channel. The PWM modulates the oscillator circuit
to control the power being sent to the secondary side. Feedback
allows for significantly higher power and efficiency.
Figure 14. Recommended PCB Layout
In applications involving high common-mode transients, ensure
that board coupling across the isolation barrier is minimized.
Furthermore, design the board layout such that any coupling that
does occur affects all pins equally on a given component side.
Failure to ensure this can cause voltage differentials between
pins exceeding the absolute maximum ratings for the device
as specified in Table 10, thereby leading to latch-up and/or
permanent damage.
The ADuM5000 is a power device that dissipates approximately
1 W of power when fully loaded. Because it is not possible to apply
a heat sink to an isolation device, the device primarily depends
on heat dissipation into the PCB through the GND pins. If the
device is used at high ambient temperatures, provide a thermal
path from the GND pins to the PCB ground plane. The board
layout in Figure 14 shows enlarged pads for Pin 2 and Pin 8
(GND1) and for Pin 9 and Pin 15 (GNDISO). Implement multiple
vias from the pad to the ground plane to significantly reduce the
temperature inside the chip. The dimensions of the expanded
pads are at the discretion of the designer and depend on the
available board space.
START-UP BEHAVIOR
The ADuM5000 does not contain a soft start circuit. Take the
start-up current and voltage behavior into account when designing
with this device.
When power is applied to VDD1, the input switching circuit begins
to operate and draw current when the UVLO minimum voltage
is reached. The switching circuit drives the maximum available
power to the output until it reaches the regulation voltage where
PWM control begins. The amount of current and time this
takes depends on the load and the VDD1 slew rate.
Rev. B | Page 11 of 16
ADuM5000
Data Sheet
With a fast VDD1 slew rate (200 μs or less), the peak current
draws up to 100 mA/V of VDD1. The input voltage goes high
faster than the output can turn on; therefore, the peak current
is proportional to the maximum input voltage.
With a slow VDD1 slew rate (in the millisecond range), the input
voltage does not change quickly when VDD1 reaches UVLO. The
current surge is about 300 mA because VDD1 is nearly constant at
the 2.7 V UVLO point. The behavior during start-up is similar
to when the device load is a short circuit; these values are consistent with the short-circuit current shown in Figure 7.
When starting the device for VISO = 5 V operation, do not limit
the current available to the VDD1 power pin to less than 300 mA.
The ADuM5000 may not be able to drive the output to the
regulation point if a current-limiting device clamps the VDD1
voltage during startup. As a result, the ADuM5000 can draw
large amounts of current at low voltage for extended periods.
The output voltage of the ADuM5000 device exhibits VISO overshoot during startup. If this could potentially damage components
attached to VISO, then a voltage-limiting device, such as a Zener
diode, can be used to clamp the voltage. Typical behavior is
shown in Figure 12 and Figure 13.
EMI CONSIDERATIONS
CURRENT LIMIT AND THERMAL OVERLOAD
PROTECTION
The ADuM5000 is protected against damage due to excessive
power dissipation by thermal overload protection circuits. Thermal
overload protection limits the junction temperature to a maximum
of 150°C (typical). Under extreme conditions (that is, high ambient
temperature and power dissipation), when the junction temperature starts to rise above 150°C, the PWM is turned off, which
turns off the output current. When the junction temperature
falls below 130°C (typical), the PWM turns on again, restoring
the output current to its nominal value.
Consider the case where a hard short from VISO to ground occurs.
At first, the ADuM5000 reaches its maximum current, which is
proportional to the voltage applied at VDD1. Power dissipates on
the primary side of the converter (see Figure 7). If self-heating of
the junction becomes great enough to cause its temperature to rise
above 150°C, thermal shutdown activates, turning off the PWM
and turning off the output current. As the junction temperature
cools and falls below 130°C, the PWM turns on and power
dissipates again on the primary side of the converter, causing
the junction temperature to rise to 150°C again. This thermal
oscillation between 130°C and 150°C causes the part to cycle
on and off as long as the short remains at the output.
It is necessary for the dc-to-dc converter section of the ADuM5000
to operate at 180 MHz to allow efficient power transfer through
the small transformers. This creates high frequency currents that
can propagate in circuit board ground and power planes, causing
edge emissions and dipole radiation between the input and output
ground planes. Grounded enclosures are recommended for
applications that use these devices. If grounded enclosures are
not possible, follow good RF design practices in the layout of
the PCB. See the AN-0971 Application Note for board layout
recommendations.
Thermal limit protections are intended to protect the device
against accidental overload conditions. For reliable operation,
externally limit device power dissipation to prevent junction
temperatures from exceeding 130°C.
THERMAL ANALYSIS
When the primary side oscillator begins to operate, it transfers
power to the secondary power circuits. The secondary VISO voltage
starts below its UVLO limit making it inactive and unable to
generate a regulation control signal. The primary side power
oscillator is allowed to free run under this condition, supplying
the maximum amount of power to the secondary side.
The ADuM5000 consists of four internal silicon die, attached to
a split lead frame with two die attach paddles. For the purposes
of thermal analysis, it is treated as a thermal unit with the highest
junction temperature reflected in the θJA from Table 5. The value
of θJA is based on measurements taken with the part mounted
on a JEDEC standard 4-layer board with fine width traces and
still air. Under normal operating conditions, the ADuM5000
operates at full load across the full temperature range without
derating the output current. However, following the recommendations in the PCB Layout section decreases the thermal resistance
to the PCB, allowing increased thermal margin at high ambient
temperatures.
POWER CONSIDERATIONS
The ADuM5000 converter primary side is protected from premature operation by undervoltage lockout (UVLO) circuitry.
Below the minimum operating voltage, the power converter
holds its oscillator inactive.
As the secondary side voltage rises to its regulation setpoint,
a large inrush current transient is present at VDD1. When the
regulation point is reached, the regulation control circuit produces
the regulation control signal that modulates the oscillator on the
primary side. The VDD1 current is then reduced and is proportional
to the load current. The inrush current is less than the shortcircuit current shown in Figure 7. The duration of the inrush
depends on the VISO loading conditions and on the current and
voltage available at the VDD1 pin.
Rev. B | Page 12 of 16
Data Sheet
ADuM5000
INCREASING AVAILABLE POWER
Table 14. Allowed Combinations of isoPower Parts
The ADuM5000 device is designed to work in combination with
other compatible isoPower devices. The RCOUT, RCIN, and RCSEL
pins allow the ADuM5000 to provide its PWM signal to another
device through the RCOUT pin acting as a master. It can also
receive a PWM signal from another device through its RCIN pin
and act as a slave to that control signal. The RCSEL pin chooses
whether the part acts as a master or slave device.
When the ADuM5000 is acting as a slave, its power is regulated
by the master device, allowing multiple isoPower parts to be
combined in parallel while sharing the load equally. When the
ADuM5000 is configured as a master or standalone unit, it
generates its own PWM feedback signal to regulate itself and
slave devices.
The ADuM5000 can function as a master, slave, or standalone
device. All devices in the ADuM5xxx and ADuM6xxx family
can function as standalone devices. Some of these devices also
function as master devices or slave devices, but not both (see
Table 14).
Table 15 shows how isoPower devices can provide many
combinations of data channel count and multiples of the
single unit power.
Part No.
ADuM6000
ADuM620x
ADuM640x
ADuM5000
ADuM520x
ADuM5400
ADuM5401 to
ADuM5404
Master
Yes
No
No
Yes
No
No
Yes
Function
Slave
Yes
Yes
No
Yes
Yes
No
No
Standalone
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Another feature allowed by the RCSEL and RCIN control architecture
is the ability to completely shut down the oscillator in the dc-todc converter. This places the part in a low power standby mode
and reduces the current draw to a fraction of a milliamp.
When the ADuM5000 is placed in slave mode by driving RCSEL
low, the oscillator is controlled by RCIN. If RCIN is held low, the
oscillator is shut down and the part is in low power standby
mode. With no oscillator driving power to the secondary side,
VISO turns off. This mode is useful for applications where an
isolated subsystem may be shut down to conserve power. To
reactivate the power module, drive RCSEL high; the power supply
resumes operation.
Table 15. Configurations for Power and Data Channels
Power Units
1-Unit Power
0 Channels
ADuM6000 or ADuM5000 (standalone)
Number of Data Channels
2 Channels
ADuM620x or ADuM520x (standalone)
2-Unit Power
ADuM6000 or ADuM5000 (master)
ADuM6000 or ADuM5000 (slave)
ADuM6000 or ADuM5000 (master)
ADuM620x or ADuM520x (slave)
3-Unit Power
ADuM6000 or ADuM5000 (master)
ADuM6000 or ADuM5000 (slave)
ADuM6000 or ADuM5000 (slave)
ADuM6000 or ADuM5000 (master)
ADuM6000 or ADuM5000 (slave)
ADuM620x or ADuM520x (slave)
Rev. B | Page 13 of 16
4 Channels
ADuM5401, ADuM5402, ADuM5403,
ADuM5404, or ADuM640x (standalone)
ADuM5401, ADuM5402, ADuM5403,
ADuM5404 (master)
ADuM6000 or ADuM5000 (slave)
ADuM6000 or ADuM5000 (master)
ADuM620x or ADuM520x (slave)
ADuM620x or ADuM520x (slave)
ADuM5000
Data Sheet
The insulation lifetime of the ADuM5000 depends on the voltage
waveform imposed across the isolation barrier. The iCoupler
insulation structure degrades at different rates depending on
whether the waveform is bipolar ac, unipolar ac, or dc. Figure 15,
Figure 16, and Figure 17 illustrate these different isolation voltage
waveforms.
Bipolar ac voltage is the most stringent environment. The goal
of a 50-year operating lifetime under the ac bipolar condition
determines the maximum working voltage that Analog Devices
recommends.
RATED PEAK VOLTAGE
07539-021
Analog Devices performs accelerated life testing using voltage
levels higher than the rated continuous working voltage. Acceleration factors for several operating conditions are determined.
These factors allow calculation of the time to failure at the actual
working voltage. The values shown in Table 11 summarize the
peak voltage for 50 years of service life for a bipolar ac operating
condition, and the maximum CSA/VDE approved working
voltages. In many cases, the approved working voltage is higher
than 50-year service life voltage. Operation at these high working voltages can lead to shortened insulation life in some cases.
0V
Figure 15. Bipolar AC Waveform
RATED PEAK VOLTAGE
07539-022
All insulation structures eventually break down when subjected
to voltage stress over a sufficiently long period. The rate of insulation degradation is dependent on the characteristics of the
voltage waveform applied across the insulation. In addition to
the testing performed by the regulatory agencies, Analog Devices
carries out an extensive set of evaluations to determine the lifetime of the insulation structure within the ADuM5000.
In the case of unipolar ac or dc voltage, the stress on the insulation is significantly lower. This allows operation at higher working
voltages while still achieving a 50-year service life. The working
voltages listed in Table 11 can be applied while maintaining the
50-year minimum lifetime, provided the voltage conforms to
either the unipolar ac or dc voltage cases. Treat any cross insulation voltage waveform that does not conform to Figure 16 or
Figure 17 as a bipolar ac waveform and limit its peak voltage to
the 50-year lifetime voltage value listed in Table 11. The voltage
presented in Figure 16 is shown as sinusoidal for illustration
purposes only. It is meant to represent any voltage waveform
varying between 0 V and some limiting value. The limiting
value can be positive or negative, but the voltage cannot cross 0 V.
0V
Figure 16. Unipolar AC Waveform
RATED PEAK VOLTAGE
07539-023
INSULATION LIFETIME
0V
Figure 17. DC Waveform
Rev. B | Page 14 of 16
Data Sheet
ADuM5000
OUTLINE DIMENSIONS
10.50 (0.4134)
10.10 (0.3976)
9
16
7.60 (0.2992)
7.40 (0.2913)
8
1.27 (0.0500)
BSC
0.30 (0.0118)
0.10 (0.0039)
COPLANARITY
0.10
0.51 (0.0201)
0.31 (0.0122)
10.65 (0.4193)
10.00 (0.3937)
0.75 (0.0295)
45°
0.25 (0.0098)
2.65 (0.1043)
2.35 (0.0925)
SEATING
PLANE
8°
0°
0.33 (0.0130)
0.20 (0.0079)
COMPLIANT TO JEDEC STANDARDS MS-013-AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
1.27 (0.0500)
0.40 (0.0157)
03-27-2007-B
1
Figure 18. 16-Lead Standard Small Outline Package [SOIC_W]
Wide Body
(RW-16)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model 1, 2
ADuM5000ARWZ
1
2
Temperature Range
−40°C to +105°C
Package Description
16-Lead SOIC_W
Z = RoHS Compliant Part.
Tape and reel are available. The additional -RL suffix designates a 13-inch (1,000 units) tape and reel option.
Rev. B | Page 15 of 16
Package Option
RW-16
ADuM5000
Data Sheet
NOTES
©2008–2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D07539-0-5/12(B)
Rev. B | Page 16 of 16
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