Digital Isolator, Enhanced
System-Level ESD Reliability
ADuM3100
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V DD1 1
VI
2
(DATA IN)
8 V DD2
E
N
C
O
D
E
D
E
C
O
D
E
7 GND 2
6 VO
(DATA OUT)
V DD1 3
UPDATE
WATCHDOG
GND 1 4
5 GND 2
ADuM3100
NOTES
1. FOR PRINCIPLES OF OPERATION, SEE METHOD OF OPERATION,
DC CORRECTNESS, AND MAGNETIC FIELD IMMUNITY SECTION.
05637-001
Enhanced system-level ESD performance per IEC 61000-4-x
High data rate: dc to 100 Mbps (NRZ)
Compatible with 3.3 V and 5.0 V operation/level translation
105°C maximum operating temperature
Low power operation
5 V operation
2.0 mA maximum @ 1 Mbps
5.6 mA maximum @ 25 Mbps
18 mA maximum @ 100 Mbps
3.3 V operation
1.1 mA maximum @ 1 Mbps
4.2 mA maximum @ 25 Mbps
8.3 mA maximum @ 50 Mbps
RoHS-compliant, 8-lead SOIC
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals
UL recognized: 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
Figure 1.
APPLICATIONS
Digital fieldbus isolation
Opto-isolator replacement
Computer-peripheral interface
Microprocessor system interface
General instrumentation and data acquisition
GENERAL DESCRIPTION
The ADuM31001 is a digital isolator based on the Analog
Devices, Inc., iCoupler® technology. Combining high speed
CMOS and monolithic transformer technology, this isolation
component provides outstanding performance characteristics
superior to alternatives, such as optocoupler devices.
Configured as a pin-compatible replacement for existing high
speed optocouplers, the ADuM3100 supports data rates as high
as 25 Mbps and 100 Mbps.
The ADuM3100 operates with a voltage supply ranging from 3.0 V
to 5.5 V, boasts a propagation delay of 400
II
565
mm
V
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
Maximum Working Voltage Compatible with 50 Years
Service Life
CTI
VIORM
Rev. D | Page 7 of 16
V peak
Conditions
Measured from input terminals to output terminals,
shortest distance through air
Measured from input terminals to output terminals,
shortest distance path along body
Insulation distance through insulation
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
Continuous peak voltage across the isolation barrier
ADuM3100
Data Sheet
DIN V VDE V 0884-10 (VDE V 0884-10) INSULATION CHARACTERISTICS
This isolator is suitable for reinforced isolation only within the safety limit data. Maintenance of the safety data is ensured by means of
protective circuits. The asterisk (*) on the package denotes DIN V VDE V 0884-10 approval for 560 V peak working voltage.
Table 7.
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
Input-to-Output Test Voltage, Method A
After Environmental Tests Subgroup 1
After Input and/or Safety Test Subgroup 2
and Subgroup 3
Highest Allowable Overvoltage
Safety-Limiting Values
Case Temperature
Side 1 Current
Side 2 Current
Insulation Resistance at TS
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
Characteristic
Unit
VIORM
VPR
I to IV
I to III
I to II
40/105/21
2
560
1050
V peak
V peak
896
672
V peak
V peak
VTR
4000
V peak
TS
IS1
IS2
RS
150
160
170
>109
°C
mA
mA
Ω
VPR
VIORM × 1.2 = VPR, tm = 60 sec, partial discharge < 5 pC
Transient overvoltage, tTR = 10 seconds
Maximum value allowed in the event of a failure
(see Figure 2)
VIO = 500 V
RECOMMENDED OPERATING CONDITIONS
180
160
Table 8.
140
Parameter
Operating Temperature
Supply Voltages1
OUTPUT CURRENT
120
100
INPUT CURRENT
80
60
40
05637-002
SAFETY-LIMITING CURRENT (mA)
Symbol
20
0
0
50
100
150
CASE TEMPERATURE (°C)
200
Figure 2. Thermal Derating Curve, Dependence of Safety-Limiting Values
with Case Temperature per DIN V VDE V 0884-10
Logic High Input Voltage,
5 V Operation
(See Figure 10 and Figure 11)
Logic Low Input Voltage,
5 V Operation1, 2
(See Figure 10 and Figure 11)
Logic High Input Voltage,
3.3 V Operation1, 2
(See Figure 10 and Figure 11)
Logic Low Input Voltage,
3.3 V Operation1, 2
(See Figure 10 and Figure 11)
Input Signal Rise and Fall Times
1
2
Symbol
TA
VDD1,
VDD2
VIH
Min
−40
3.0
Max
+105
5.5
Unit
°C
V
2.0
VDD1
V
VIL
0.0
0.8
V
VIH
1.5
VDD1
V
VIL
0.0
0.5
V
1.0
ms
All voltages are relative to their respective ground.
Input switching thresholds have 300 mV of hysteresis. See the Method of
Operation, DC Correctness, and Magnetic Field Immunity section, Figure 18,
and Figure 19 for information on immunity to external magnetic fields.
Rev. D | Page 8 of 16
Data Sheet
ADuM3100
ABSOLUTE MAXIMUM RATINGS
Ambient temperature = 25°C, unless otherwise noted.
Table 9.
Parameter
Storage Temperature (TST)
Ambient Operating Temperature (TA)
Supply Voltages (VDD1, VDD2)1
Input Voltage (VI)1
Output Voltage (VO)1
Average Current, per Pin2
Temperature ≤ 105°C
Common-Mode Transients3
Min
−55
−40
−0.5
−0.5
−0.5
Max
+150
+105
+6.5
VDD1 + 0.5
VDD2 + 0.5
Unit
°C
°C
V
V
V
−25
−100
+25
+100
mA
kV/µs
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
1
All voltages are relative to their respective ground.
See Figure 2 for information on maximum allowable current for various
temperatures.
3
Refers to common-mode transients across the insulation barrier. Commonmode transients exceeding the Absolute Maximum Rating can cause latchup or permanent damage.
2
Table 10. Truth Table (Positive Logic)
VI Input
H
L
X
X
1
VDD1 State
Powered
Powered
Unpowered
Powered
VDD2 State
Powered
Powered
Powered
Unpowered
VO returns to VI state within 1 μs of power restoration.
Rev. D | Page 9 of 16
VO Output
H
L
H1
X1
ADuM3100
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VDD1 1 1
VI 2
VDD1 1 3
GND1 4
8
VDD2
ADuM3100
7
TOP VIEW
(Not to Scale)
GND22
6
VO
5
GND22
1 AND PIN 3 ARE INTERNALLY CONNECTED. IT IS STRONGLY
RECOMMENDED THAT BOTH BE CONNECTED TO VDD1 .
5 AND PIN 7 ARE INTERNALLY CONNECTED. IT IS STRONGLY
RECOMMENDED THAT BOTH BE CONNECTED TO GND2.
2PIN
Figure 3. Pin Configuration
Table 11. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
Mnemonic
VDD1
VI
VDD1
GND1
GND2
VO
GND2
VDD2
Description
Input Supply Voltage, 3.0 V to 5.5 V
Logic Input
Input Supply Voltage, 3.0 V to 5.5 V
Input Ground
Output Ground
Logic Output
Output Ground
Output Supply Voltage, 3.0 V to 5.5 V
Rev. D | Page 10 of 16
05637-003
1PIN
Data Sheet
ADuM3100
TYPICAL PERFORMANCE CHARACTERISTICS
20
18
18
17
PROPAGATION DELAY (ns)
16
12
5V
10
8
3.3V
6
4
tPHL
15
tPLH
14
0
0
100
50
75
DATA RATE (Mbps)
25
125
12
–50
150
Figure 4. Typical Input Supply Current vs. Logic Signal Frequency
for 5 V and 3.3 V Operation
4
13
PROPAGATION DELAY (ns)
14
3
5V
2
3.3V
05637-005
0
50
75
100
DATA RATE (Mbps)
0
75
25
50
TEMPERATURE (°C)
100
125
tPLH
12
tPHL
11
10
1
25
–25
Figure 7. Typical Propagation Delays vs. Temperature, 3.3 V Operation
5
0
05637-007
05637-004
13
2
CURRENT (mA)
16
125
9
–50
150
Figure 5. Typical Output Supply Current vs. Logic Signal Frequency
for 5 V and 3.3 V Operation
05637-008
CURRENT (mA)
14
–25
0
25
50
75
TEMPERATURE (°C)
100
125
Figure 8. Typical Propagation Delays vs. Temperature, 5 V/3 V Operation
13
18
PROPAGATION DELAY (ns)
PROPAGATION DELAY (ns)
17
12
11
tPHL
tPLH
10
16
tPHL
15
tPLH
14
–25
0
50
75
25
TEMPERATURE (°C)
100
12
–50
125
Figure 6. Typical Propagation Delays vs. Temperature, 5 V Operation
05637-009
9
–50
05637-006
13
–25
0
25
50
75
TEMPERATURE (°C)
100
125
Figure 9. Typical Propagation Delays vs. Temperature, 3 V/5 V Operation
Rev. D | Page 11 of 16
Data Sheet
1.4
1.6
1.3
INPUT THRESHOLD, VITH (V)
1.7
–40°C
1.5
+25°C
1.4
1.3
+105°C
–40°C
+25°C
1.2
+105°C
1.1
1.0
1.1
3.0
3.5
4.0
4.5
5.0
INPUT SUPPLY VOLTAGE, VDD1 (V)
0.8
3.0
5.5
05637-011
0.9
1.2
05637-010
INPUT THRESHOLD, VITH (V)
ADuM3100
3.5
4.0
4.5
5.0
INPUT SUPPLY VOLTAGE, VDD1 (V)
Figure 11. Typical Input Voltage Switching Threshold,
High-to-Low Transition
Figure 10. Typical Input Voltage Switching Threshold,
Low-to-High Transition
Rev. D | Page 12 of 16
5.5
Data Sheet
ADuM3100
APPLICATIONS INFORMATION
PC BOARD LAYOUT
PROPAGATION DELAY-RELATED PARAMETERS
The ADuM3100 digital isolator requires no external interface
circuitry for the logic interfaces. A bypass capacitor is
recommended at the input and output supply pins. The input
bypass capacitor can conveniently connect between Pin 3 and
Pin 4 (see Figure 12). Alternatively, the bypass capacitor can be
located between Pin 1 and Pin 4. The output bypass capacitor
can be connected between Pin 7 and Pin 8 or Pin 5 and Pin 8.
The capacitor value should be between 0.01 μF and 0.1 μF. The
total lead length between both ends of the capacitor and the
power supply pins should not exceed 20 mm.
Propagation delay time describes the length of time it takes for a
logic signal to propagate through a component. Propagation
delay time to logic low output and propagation delay time to
logic high output refer to the duration between an input signal
transition and the respective output signal transition
(see Figure 13).
50%
tPLH
OUTPUT (VO)
50%
VDD2
Figure 13. Propagation Delay Parameters
VO (DATA OUT)
GND1
GND2
05637-012
(OPTIONAL)
Figure 12. Recommended Printed Circuit Board Layout
See the AN-1109 Application Note for board layout guidelines.
SYSTEM-LEVEL ESD CONSIDERATIONS AND
ENHANCEMENTS
System-level ESD reliability (for example, per IEC 61000-4-x)
is highly dependent on system design, which varies widely by
application. The ADuM3100 incorporates many enhancements
to make ESD reliability less dependent on system design. The
enhancements include
ESD protection cells added to all input/output interfaces.
Key metal trace resistances reduced using wider geometry
and paralleling of lines with vias.
The SCR effect inherent in CMOS devices minimized by
use of guarding and isolation techniques between PMOS
and NMOS devices.
Areas of high electric field concentration eliminated using
45° corners on metal traces.
Supply pin overvoltage prevented with larger ESD clamps
between each supply pin and its respective ground.
While the ADuM3100 improves system-level ESD reliability, it
is no substitute for a robust system-level design. See the AN-1109
Application Note, ESD/Latch-Up Considerations with iCoupler
Isolation Products for detailed recommendations on board
layout and system-level design.
VI
Pulse-width distortion is the maximum difference between tPLH
and tPHL and provides an indication of how accurately the input
signal timing is preserved in the component output signal.
Propagation delay skew is the difference between the minimum
and maximum propagation delay values among multiple
ADuM3100 components operated at the same operating
temperature and having the same output load.
Depending on the input signal rise/fall time, the measured
propagation delay based on the input 50% level can vary from
the true propagation delay of the component (as measured from
its input switching threshold). This is due to the fact that the
input threshold, as is the case with commonly used optocouplers,
is at a different voltage level than the 50% point of typical input
signals. This propagation delay difference is
ΔLH = t'PLH − tPLH = (tr/0.8 VI)(0.5 V1 − VITH (L-H))
ΔHL = t'PHL − tPHL = (tf/0.8 VI)(0.5 V1 − VITH (H-L))
where:
tPLH, tPHL are propagation delays as measured from the input
50%.
t'PLH, t'PHL are propagation delays as measured from the input
switching thresholds.
tr, tf are input 10% to 90% rise/fall time.
VI is the amplitude of input signal (0 V to VI levels assumed).
VITH (L–H), VITH (H–L) are input switching thresholds.
∆LH
∆HL
VITH(L–H)
50%
VITH(H–L)
tPLH
INPUT (VI)
tPHL
t'PLH
50%
OUTPUT (VO)
Figure 14. Impact of Input Rise/Fall Time on Propagation Delay
Rev. D | Page 13 of 16
t'PHL
05637-014
V1 (DATA)
tPHL
05637-013
VDD1
INPUT (VI)
ADuM3100
Data Sheet
3
5V INPUT SIGNAL
2
1
3.3V INPUT SIGNAL
0
1
2
3
4
8
5
6
7
INPUT RISE TIME (10%–90%, ns)
9
4
5V INPUT SIGNAL
3
3.3V INPUT SIGNAL
2
1
0
10
1
Figure 15. Typical Propagation Delay Change Due to
Input Rise Time Variation (for VDD1 = 3.3 V and 5 V)
2
3
4
5
6
7
8
INPUT RISE/FALL TIME (10%–90%, ns)
9
10
Figure 17. Typical Pulse-Width Distortion Adjustment Due to
Input Rise/Fall Time Variation (for VDD1 = 3.3 V and 5 V)
0
METHOD OF OPERATION, DC CORRECTNESS, AND
MAGNETIC FIELD IMMUNITY
Referring to Figure 1, the two coils act as a pulse transformer.
Positive and negative logic transitions at the isolator input
cause narrow (2 ns) pulses to be sent via the transformer to the
decoder. The decoder is bistable and therefore either set or reset
by the pulses indicating input logic transitions. In the absence
of logic transitions at the input for more than ~1 μs, a periodic
update pulse of the appropriate polarity is sent to ensure dc
correctness at the output. If the decoder does not receive any of
these update pulses for more than approximately 5 μs, the input
side is assumed unpowered or nonfunctional, in which case the
isolator output is forced to a logic high state by the watchdog
timer circuit.
–1
5V INPUT SIGNAL
–2
3.3V INPUT SIGNAL
–3
05637-016
PROPAGATION DELAY CHANGE, ∆HL (ns)
5
05637-017
PULSE-WIDTH DISTORTION ADJUSTMENT,
∆PWD (ns)
6
05637-015
PROPAGATION DELAY CHANGE, ∆LH (ns)
4
–4
1
2
3
4
5
6
7
8
INPUT RISE TIME (10%–90%, ns)
9
10
Figure 16. Typical Propagation Delay Change Due to
Input Fall Time Variation (for VDD1 = 3.3 V and 5 V)
The impact of the slower input edge rates can also affect the
measured pulse-width distortion as based on the input 50%
level. This impact can either increase or decrease the apparent
pulse-width distortion depending on the relative magnitudes of
tPHL, tPLH, and PWD. The case of interest here is the condition
that leads to the largest increase in pulse-width distortion. The
change in this case is given by
ΔPWD = PWDʹ − PWD = ΔLH − ΔHL =
(t/0.8 V1)(V − VITH (L-H) − VITH (H-L)), (for t = tr = tf)
where:
PWD = |tPLH − tPHL|.
PWDʹ = |t'PLH − t'PHL|.
This adjustment in pulse-width distortion is plotted as a
function of input rise/fall time in Figure 17.
The limitation on the ADuM3100 magnetic field immunity
is set by the condition in which induced voltage in the
transformer-receiving coil is sufficiently large to either falsely
set or reset the decoder. The analysis that follows defines the
conditions under which this can occur. The ADuM3100 3.3 V
operating condition is examined because it represents the most
susceptible mode of operation.
The pulses at the transformer output are greater than 1.0 V in
amplitude. The decoder has sensing thresholds at about 0.5 V,
therefore establishing a 0.5 V margin in which induced voltages
can be tolerated. The voltage induced across the receiving coil is
given by
V = (−dβ/dt) ∑π rn2, n = 1, 2, . . . , N
where:
β is magnetic flux density (gauss).
N is the number of turns in the receiving coil.
rn is the radius of nth turn in the receiving coil (cm).
Rev. D | Page 14 of 16
Data Sheet
ADuM3100
1
0.1
DISTANCE = 1m
100
10
DISTANCE = 100mm
1
DISTANCE = 5mm
0.1
0.01
1k
05637-019
10
10k
100k
1M
10M
100M
MAGNETIC FIELD FREQUENCY (Hz)
0.01
0.001
1k
Figure 19. Maximum Allowable Current for Current-to-ADuM3100 Spacing
05637-018
MAXIMUM ALLOWABLE MAGNETIC FLUX
DENSITY (kgauss)
100
1000
MAXIMUM ALLOWABLE CURRENT (kA)
Given the geometry of the receiving coil in the ADuM3100 and
an imposed requirement that the induced voltage be at most
50% of the 0.5 V margin at the decoder, a maximum allowable
magnetic field is calculated, as shown in Figure 18.
10k
100k
1M
10M
100M
MAGNETIC FIELD FREQUENCY (Hz)
Figure 18. Maximum Allowable External Magnetic Field
For example, at a magnetic field frequency of 1 MHz, the
maximum allowable magnetic field of 0.2 kgauss induces a
voltage of 0.25 V at the receiving coil. This is about 50% of the
sensing threshold and does not cause a faulty output transition.
Similarly, if such an event were to occur during a transmitted
pulse (and had the worst-case polarity), it reduces the received
pulse from >1.0 V to 0.75 V—still well above the 0.5 V sensing
threshold of the decoder.
The preceding magnetic flux density values correspond to
specific current magnitudes at given distances away from
the ADuM3100 transformers. Figure 19 shows the allowable
current magnitudes as a function of frequency for selected
distances. As shown, the ADuM3100 is extremely immune and
can be affected only by extremely large currents operated at
high frequency and very close to the component. For the 1 MHz
example noted, a current of 0.5 kA would have to be placed
5 mm away from the ADuM3100 to affect the component’s
operation.
Note that at combinations of strong magnetic field and high
frequency, any loops formed by printed circuit board traces
could induce sufficiently large error voltages to trigger the
thresholds of succeeding circuitry. Care should be taken in
the layout of such traces to avoid this possibility.
POWER CONSUMPTION
The supply current of the ADuM3100 isolator is a function of
the supply voltage, the input data rate, and the output load.
The input supply current is given by
IDDI = IDDI (Q)
f ≤ 0.5fr
IDDI = IDDI (D) × (2f − fr) + IDDI (Q)
f > 0.5fr
The output supply current is given by
IDDO = IDDO (Q)
f ≤ 0.5fr
−3
IDDO = (IDDO (D) + (0.5 × 10 ) × CLVDDO) × (2f − fr) + IDDO (Q)
f > 0.5fr
where:
IDDI (D), IDDO (D) are the input and output dynamic supply currents
per channel (mA/Mbps).
CL is output load capacitance (pF).
VDDO is the output supply voltage (V).
f is the input logic signal frequency (MHz, half of the input data
rate, NRZ signaling).
fr is the input stage refresh rate (Mbps).
IDDI (Q), IDDO (Q) are the specified input and output quiescent
supply currents (mA).
Rev. D | Page 15 of 16
ADuM3100
Data Sheet
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
1
5
6.20 (0.2441)
5.80 (0.2284)
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
SEATING
PLANE
0.50 (0.0196)
0.25 (0.0099)
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-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.
012407-A
8
4.00 (0.1574)
3.80 (0.1497)
Figure 20. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body (R-8)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model1
ADuM3100ARZ
ADuM3100ARZ-RL7
ADuM3100BRZ
ADuM3100BRZ-RL7
1
Temperature Range
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
−40°C to +105°C
Max Data
Rate (Mbps)
25
25
100
100
Minimum
Pulse Width (ns)
40
40
10
10
Z = RoHS Compliant Part.
©2005–2015 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05637-0-7/15(D)
Rev. D | Page 16 of 16
Package Description
8-Lead SOIC_N
8-Lead SOIC_N, 1,000 Piece Reel
8-Lead SOIC_N
8-Lead SOIC_N, 1,000 Piece Reel
Package
Option
R-8
R-8
R-8
R-8
工商网监
湘ICP备2023018690号
