ADUM4190ARIZ-RL [ADI]
High Stability Isolated Error Amplifier;
| 型号： | ADUM4190ARIZ-RL |
| 厂家： | 
ADI |
| 描述： | High Stability Isolated Error Amplifier 光电二极管 |
| 文件： | 总21页 (文件大小：512K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
High Stability Isolated Error Amplifier
Data Sheet
ADuM4190
FEATURES
GENERAL DESCRIPTION
Stable over time and temperature
0.5% initial accuracy
1% accuracy over the full temperature range
The ADuM41901 is an isolated error amplifier based on Analog
Devices, Inc., iCoupler® technology. The ADuM4190 is ideal for
linear feedback power supplies. The primary side controllers of
Compatible with Type II or Type III compensation networks
Reference voltage: 1.225 V
Compatible with DOSA
the ADuM4190 enable improvements in transient response, power
density, and stability as compared to commonly used optocoupler
and shunt regulator solutions.
Low power operation: <7 mA total
Wide voltage supply range
Unlike optocoupler-based solutions, which have an uncertain
current transfer ratio over lifetime and at high temperatures, the
ADuM4190 transfer function does not change over its lifetime
and is stable over a wide temperature range of −40°C to +125°C.
V
V
DD1: 3 V to 20 V
DD2: 3 V to 20 V
Bandwidth: 400 kHz
Included in the ADuM4190 is a wideband operational amplifier
for a variety of commonly used power supply loop compensation
techniques. The ADuM4190 is fast enough to allow a feedback loop
to react to fast transient conditions and overcurrent conditions.
Also included is a high accuracy 1.225 V reference to compare
with the supply output setpoint.
Isolation voltage: 5 kV rms reinforced
Safety and regulatory approvals (pending)
UL recognition: 5000 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
V
IORM = 849 V peak
The ADuM4190 is packaged in a wide body, 16-lead SOIC package
for a reinforced 5 kV rms isolation voltage rating.
Wide temperature range
−40°C to +125°C ambient operation
150°C maximum junction temperature
APPLICATIONS
Linear feedback power supplies
Inverters
Uninterruptible power supplies (UPS)
DOSA-compatible modules
Voltage monitors
FUNCTIONAL BLOCK DIAGRAM
V
V
DD2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DD1
GND
1
GND
V
2
V
REG UVLO
UVLO
REG
REG1
REG2
REF
REF
REF
REF
OUT1
OUT
NC
+IN
–IN
Tx
EA
OUT2
Rx
EA
OUT
COMP
GND
2
GND
1
ADuM4190
Figure 1.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.
Rev. 0 Document Feedback
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Technical Support
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www.analog.com
ADUM4190* PRODUCT PAGE QUICK LINKS
Last Content Update: 07/21/2017
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EVALUATION KITS
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DOCUMENTATION
Data Sheet
DISCUSSIONS
View all ADUM4190 EngineerZone Discussions.
• ADuM4190-DSCC: Military Data Sheet
• ADUM4190-EP: Enhanced Product Data Sheet
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• ADuM4190: High Stability Isolated Error Amplifier Data
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Sheet
TECHNICAL SUPPORT
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number.
TOOLS AND SIMULATIONS
• ADuM3190/ADuM4190 Spice Macro Model
REFERENCE DESIGNS
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REFERENCE MATERIALS
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• Isolated Error Amplifiers Outperform Optocouplers and
Shunt Regulators in Power Supply Applications
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ADuM4190
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Pin Configuration and Function Descriptions..............................7
Typical Performance Characteristics ..............................................8
Test Circuits..................................................................................... 12
Applications Information .............................................................. 13
Accuracy Circuit Operation...................................................... 13
Isolated Amplifier Circuit Operation ...................................... 14
Application Block Diagram ...................................................... 14
Setting the Output Voltage........................................................ 15
DOSA Module Application....................................................... 15
DC Correctness and Magnetic Field Immunity..................... 15
Insulation Lifetime..................................................................... 16
Outline Dimensions....................................................................... 17
Ordering Guide .......................................................................... 17
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Package Characteristics ............................................................... 4
Regulatory Information............................................................... 4
Insulation and Safety Related Specifications ............................ 4
Recommended Operating Conditions ...................................... 5
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
Insulation Characteristics............................................................ 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
REVISION HISTORY
7/13—Revision 0: Initial Version
Rev. 0 | Page 2 of 20
Data Sheet
ADuM4190
SPECIFICATIONS
VDD1 = VDD2 = 3 V to 20 V for TA = TMIN to TMAX. All typical specifications are at TA = 25°C and VDD1 = VDD2 = 5 V, unless otherwise noted.
Table 1.
Parameter
Test Conditions/Comments
(1.225 V − EAOUT)/1.225 V × 100%; see Figure 27
TA = 25°C
Min
Typ
Max
Unit
ACCURACY
Initial Error
Total Error
0.25
0.5
0.5
1
%
%
TA = TMIN to TMAX
OP AMP
Offset Error
−5
66
0.35
2.5
80
+5
mV
dB
V
MHz
dB
pF
V
Open-Loop Gain
Input Common-Mode Range
Gain Bandwidth Product
Common-Mode Rejection
Input Capacitance
Output Voltage Range
Input Bias Current
REFERENCE
1.5
10
72
2
COMP pin
0.2
2.7
0.01
µA
Output Voltage
0 mA to 1 mA load, CREFOUT = 15 pF
TA = 25°C
1.215
1.213
2.0
1.225
1.225
1.235
1.237
V
V
mA
TA = TMIN to TMAX
CREFOUT = 15 pF
Output Current
UVLO
Positive Going Threshold
Negative Going Threshold
EAOUT Impedance
OUTPUT CHARACTERISTICS
Output Gain1
2.8
2.6
High-Z
2.96
V
V
Ω
2.4
VDD2 or VDD1 < UVLO threshold
See Figure 29
From COMP to EAOUT, 0.3 V to 2.4 V, 3 mA
From EAOUT to EAOUT2, 0.4 V to 5.0 V, 1 mA,
VDD1 = 20 V
0.83
2.5
1.0
2.6
1.17
2.7
V/V
V/V
Output Offset Voltage
Output Linearity2
From COMP to EAOUT, 0.3 V to 2.4 V, 3 mA
From EAOUT to EAOUT2, 0.4 V to 5.0 V, 1 mA,
−0.4
−0.1
+0.05
+0.01
+0.4
+0.1
V
V
V
DD1 = 20 V
From COMP to EAOUT, 0.3 V to 2.4 V, 3 mA
From EAOUT to EAOUT2, 0.4 V to 5.0 V, 1 mA,
−1.0
−1.0
+0.15
+0.1
+1.0
+1.0
%
%
V
DD1 = 20 V
Output −3 dB Bandwidth
From COMP to EAOUT, 0.3 V to 2.4 V, 3 mA,
and from COMP to EAOUT2, 0.4 V to 5.0 V,
1 mA, VDD1 = 20 V
A and S Grades
B and T Grades
Output Voltage, EAOUT
Low Voltage
100
250
200
400
kHz
kHz
3 mA output
0.4
V
V
High Voltage
2.4
2.5
Output Voltage, EAOUT2
Low Voltage
1 mA output
VDD1 = 4.5 V to 5.5 V
VDD1 = 10 V to 20 V
VDD1 = 4.5 V to 5.5 V
VDD1 = 10 V to 20 V
See Figure 15
0.3
0.3
4.9
5.4
1.7
4.8
0.6
0.6
V
V
V
V
High Voltage
4.8
5.0
Noise, EAOUT
Noise, EAOUT2
mV rms
mV rms
See Figure 15
POWER SUPPLY
Operating Range, Side 1
Operating Range, Side 2
VDD1
VDD2
3.0
3.0
20
20
V
V
Rev. 0 | Page 3 of 20
ADuM4190
Data Sheet
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
Power Supply Rejection
DC, VDD1 = VDD2 = 3 V to 20 V
60
dB
Supply Current
IDD1
IDD2
See Figure 4
See Figure 5
1.4
2.9
2.0
5.0
mA
mA
1 Output gain is defined as the slope of the best-fit line of the output voltage vs. the input voltage over the specified input range, with the offset error adjusted out.
2 Output linearity is defined as the peak-to-peak output deviation from the best-fit line of the output gain, expressed as a percentage of the full-scale output voltage.
PACKAGE CHARACTERISTICS
Table 2.
Parameter
Symbol Min
Typ
Max
Unit
Test Conditions/Comments
RESISTANCE
Input-to-Output1
CAPACITANCE
Input-to-Output1
Input Capacitance2
RI-O
1013
Ω
CI-O
CI
2.2
4.0
45
pF
f = 1 MHz
pF
IC JUNCTION-TO-AMBIENT THERMAL
RESISTANCE
θJA
°C/W
Thermocouple located at center of package
underside
1 The device is considered a 2-terminal device; Pin 1 through Pin 8 are shorted together, and Pin 9 through Pin 16 are shorted together.
2 Input capacitance is from any input pin to ground.
REGULATORY INFORMATION
The ADuM4190 is pending approval by the organizations listed in Table 3. See Table 8 and the Insulation Lifetime section for recommended
maximum working voltages for specific cross-isolation waveforms and insulation levels.
Table 3.
UL (Pending)
CSA (Pending)
VDE (Pending)
Recognized under UL 1577 component
recognition program1
Approved under CSA Component Acceptance
Notice #5A
Certified according to DIN V VDE V 0884-10
(VDE V 0884-10):2006-122
Single protection, 5000 V rms isolation
voltage, 16-lead SOIC
Reinforced insulation per CSA 60950-1-03 and
IEC 60950-1, 400 V rms (565 V peak) maximum
working voltage
Reinforced insulation, 849 V peak
Basic insulation per CSA 60950-1-03 and IEC
60950-1, 800 V rms (1131 V peak) maximum
working voltage
File E214100
File 205078
File 2471900-4880-0001
1 In accordance with UL 1577, each ADuM4190 is proof tested by applying an insulation test voltage ≥ 6000 V rms for 1 sec (current leakage detection limit = 10 µA).
2 In accordance with DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, each ADuM4190 is proof tested by applying an insulation test voltage ≥ 1590 V peak for 1 sec
(partial discharge detection limit = 5 pC). The asterisk (*) marking branded on the component designates DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 approval.
INSULATION AND SAFETY RELATED SPECIFICATIONS
Table 4.
Parameter
Symbol
Value
5000
8.0 min
Unit
V rms
mm
Test Conditions/Comments
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
1-minute duration
L(I01)
Measured from input terminals to output
terminals, shortest distance through air
along the PCB mounting plane, as an aid
to PCB layout
Minimum External Tracking (Creepage)
L(I02)
CTI
8.3 min
mm
Measured from input terminals to output
terminals, shortest distance path along body
Insulation distance through insulation
DIN IEC 112/VDE 0303, Part 1
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
0.017 min mm
>400
II
V
Material Group DIN VDE 0110, 1/89, Table 1
Rev. 0 | Page 4 of 20
Data Sheet
ADuM4190
RECOMMENDED OPERATING CONDITIONS
Table 5.
Parameter
Symbol
Min
Max
Unit
OPERATING TEMPERATURE
ADuM4190A/ADuM4190B
ADuM4190S/ADuM4190T
SUPPLY VOLTAGES1
TA
−40
−40
3.0
+85
+125
20
°C
°C
V
VDD1, VDD2
tR, tF
INPUT SIGNAL RISE AND FALL TIMES
1.0
ms
1 All voltages are relative to their respective grounds.
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 INSULATION CHARACTERISTICS
This isolator is suitable for reinforced 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 DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 approval for
an 849 V peak working voltage.
Table 6.
Description
Test Conditions/Comments
Symbol
Characteristic Unit
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
I to IV
I to III
I to II
40/105/21
2
VIORM
Vpd(m)
849
1592
V peak
V peak
VIORM × 1.875 = Vpd(m), 100% production test,
tini = 60 sec, tm = 10 sec, partial discharge < 5 pC
Input-to-Output Test Voltage, Method A
After Environmental Tests Subgroup 1
VIORM × 1.5 = Vpd(m), tini = 60 sec, tm = 10 sec, partial
discharge < 5 pC
Vpd(m)
Vpd(m)
VIOTM
1273
1018
V peak
V peak
After Input and/or Safety Tests Subgroup 2 VIORM × 1.2 = Vpd(m), tini = 60 sec, tm = 10 sec, partial
and Subgroup 3
Highest Allowable Overvoltage
Surge Isolation Voltage
Safety Limiting Values
discharge < 5 pC
6000
6000
V peak
V peak
V peak = 10 kV; 1.2 µs rise time; 50 µs, 50% fall time VIOSM
Maximum value allowed in the event of a failure
(see Figure 2)
Maximum Junction Temperature
Safety Total Dissipated Power
Insulation Resistance at TS
TS
PS
RS
150
2.78
>109
°C
W
Ω
VIO = 500 V
3.0
2.5
2.0
1.5
1.0
0.5
0
0
50
100
150
200
AMBIENT TEMPERATURE (°C)
Figure 2. Thermal Derating Curve, Dependence of Safety Limiting Values
on Case Temperature, per DIN V VDE V 0884-10
Rev. 0 | Page 5 of 20
ADuM4190
Data Sheet
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
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.
Table 7.
Parameter
Rating
Storage Temperature (TST) Range
Ambient Operating Temperature
(TA) Range
−65°C to +150°C
−40°C to +125°C
Junction Temperature Range
Supply Voltages1
−40°C to +150°C
ESD CAUTION
VDD1, VDD2
VREG1, VREG2
Input Voltages (+IN, −IN)
Output Voltages
−0.5 V to +24 V
−0.5 V to +3.6 V
−0.5 V to +3.6 V
REFOUT, REFOUT1, CO M P, EAOUT
EAOUT2
−0.5 V to +3.6 V
−0.5 V to +5.5 V
Output Current per Output Pin
Common-Mode Transients2
−11 mA to +11 mA
−100 kV/µs to +100 kV/µs
1 All voltages are relative to their respective grounds.
2 Refers to common-mode transients across the insulation barrier. Common-
mode transients exceeding the absolute maximum ratings may cause latch-up
or permanent damage.
Table 8. Maximum Continuous Working Voltage1
Parameter
Max
Unit
Constraint
AC Voltage, Bipolar Waveform
AC Voltage, Unipolar Waveform
DC Voltage
560
1131
1131
V peak
V peak
V peak
50-year minimum lifetime
50-year minimum lifetime
50-year minimum lifetime
1 Refers to the continuous voltage magnitude imposed across the isolation barrier. See the Insulation Lifetime section for more information.
Rev. 0 | Page 6 of 20
Data Sheet
ADuM4190
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
V
1
2
3
4
5
6
7
8
16
15
14
13
V
DD2
DD1
GND
GND
1
2
V
V
REG2
REG1
OUT1
NC
REF
REF
ADuM4190
TOP VIEW
(Not to Scale)
OUT
12 +IN
EA
–IN
11
10
9
OUT2
COMP
EA
OUT
GND
2
GND
1
NC = NO CONNECTION. CONNECT PIN 5 TO GND ;
1
DO NOT LEAVE THIS PIN FLOATING.
Figure 3. Pin Configuration
Table 9. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
2, 8
3
VDD1
GND1
VREG1
Supply Voltage for Side 1 (3 V to 20 V). Connect a 1 µF capacitor between VDD1 and GND1.
Ground Reference for Side 1.
Internal Supply Voltage for Side 1. Connect a 1 µF capacitor between VREG1 and GND1.
4
5
REFOUT1
NC
Reference Output Voltage for Side 1. The maximum recommended capacitance for this pin (CREFOUT1) is 15 pF.
No Connection. Connect Pin 5 to GND1; do not leave this pin floating.
6
EAOUT2
Isolated Output Voltage 2, Open-Drain Output. Connect a pull-up resistor between EAOUT2 and VDD1 for current
up to 1 mA.
7
EAOUT
GND2
COMP
−IN
Isolated Output Voltage.
Ground Reference for Side 2.
9, 15
10
11
12
13
14
16
Output of the Op Amp. A loop compensation network can be connected between the COMP pin and the −IN pin.
Inverting Op Amp Input. Pin 11 is the connection for the power supply setpoint and compensation network.
Noninverting Op Amp Input. Pin 12 can be used as a reference input.
Reference Output Voltage for Side 2. The maximum recommended capacitance for this pin (CREFOUT) is 15 pF.
Internal Supply Voltage for Side 2. Connect a 1 µF capacitor between VREG2 and GND2.
Supply Voltage for Side 2 (3 V to 20 V). Connect a 1 µF capacitor between VDD2 and GND2.
+IN
REFOUT
VREG2
VDD2
Rev. 0 | Page 7 of 20
ADuM4190
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
3
1.228
1.227
1.226
1.225
1.224
1.223
1.222
V
V
= 20V
= 5V
DDx
DDx
2
1
0
–40
–20
0
20
40
60
80
100
120
140
–40
–20
0
20
40
60
80
100
120
140
140
140
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 7. REFOUT Accuracy vs. Temperature
Figure 4. Typical IDD1 Supply Current vs. Temperature
1.0
0.5
5
4
3
2
1
0
V
V
= 20V
= 5V
DDx
DDx
0
–0.5
–1.0
–40
–20
0
20
40
60
80
100
120
140
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 5. Typical IDD2 Supply Current vs. Temperature
Figure 8. EAOUT Accuracy vs. Temperature
12
10
8
3
2
1
6
0
4
–1
–2
–3
2
0
–40
–20
0
20
40
60
80
100
120
–40
–20
0
20
40
60
80
100
120
140
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 6. +IN, −IN Input Bias Current vs. Temperature
Figure 9. Op Amp Offset Voltage vs. Temperature
Rev. 0 | Page 8 of 20
Data Sheet
ADuM4190
100
90
80
70
60
50
0
–20
–40
–60
–80
–100
–40
–20
0
20
40
60
80
100
120
140
–40
–20
0
20
40
60
80
100
120
140
140
140
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 13. EAOUT Offset Voltage vs. Temperature
Figure 10. Op Amp Open-Loop Gain vs. Temperature
1.05
100
50
1.04
1.03
1.02
1.01
1.00
0
–50
–100
–40
–20
0
20
40
60
80
100
120
140
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 11. EAOUT Gain vs. Temperature
Figure 14. EAOUT2 Offset Voltage vs. Temperature
2.66
2.64
2.62
2.60
2.58
2.56
1
2
CH1 10mV Ω CH2 10mV Ω
M4.0µs
102.4ns
A CH1
1.18V
–40
–20
0
20
40
60
80
100
120
T
TEMPERATURE (°C)
Figure 12. EAOUT2 Gain vs. Temperature
Figure 15. Output Noise with Test Circuit 1 (10 mV/DIV),
Channel 1 = EAOUT, Channel 2 = EAOUT2
Rev. 0 | Page 9 of 20
ADuM4190
Data Sheet
30
25
20
15
10
5
30
25
20
15
10
5
0
0
0.90
0.95
1.00
1.05
GAIN (V/V)
1.10
1.10
1.10
–0.4
–0.2
0
0.2
OFFSET VOLTAGE (V)
OUT
0.4
COMP TO EA
COMP TO EA
OUT
Figure 16. EAOUT Gain Distribution at 25°C
Figure 19. EAOUT Offset Voltage Distribution at 25°C
30
25
20
15
10
5
30
25
20
15
10
5
0
0.90
0
–0.4
0.95
1.00
1.05
GAIN (V/V)
–0.2
0
0.2
OFFSET VOLTAGE (V)
OUT
0.4
COMP TO EA
COMP TO EA
OUT
Figure 17. EAOUT Gain Distribution at 125°C
Figure 20. EAOUT Offset Voltage Distribution at 125°C
30
25
20
15
10
5
30
25
20
15
10
5
0
0.90
0
–0.4
0.95
1.00
1.05
GAIN (V/V)
–0.2
0
0.2
OFFSET VOLTAGE (V)
OUT
0.4
COMP TO EA
COMP TO EA
OUT
Figure 18. EAOUT Gain Distribution at −40°C
Figure 21. EAOUT Offset Voltage Distribution at −40°C
Rev. 0 | Page 10 of 20
Data Sheet
ADuM4190
30
25
20
15
10
5
1
2
3
0
CH1 100mV Ω CH2 100mV Ω M2µs
A CH1
434mV
1.215
1.220
1.225
1.230
1.235
1.235
1.235
Ω
CH3 200mV
T
0s
EA
ACCURACY (V)
OUT
Figure 22. EAOUT Accuracy Voltage Distribution at 25°C
Figure 25. Output 100 kHz Signal with Test Circuit 3, Channel 1 = +IN,
Channel 2 = EAOUT, Channel 3 = EAOUT2
30
25
20
15
10
5
2
1
3
0
CH1 20mV
CH3 20mV
Ω
Ω
CH2 50mV Ω
M2µs
T
A CH1
399mV
1.215
1.220
1.225
1.230
5.92µs
EA
ACCURACY (V)
OUT
Figure 23. EAOUT Accuracy Voltage Distribution at 125°C
Figure 26. Output Square Wave Response with Test Circuit 3,
Channel 1 = +IN, Channel 2 = EAOUT, Channel 3 = EAOUT2
30
25
20
15
10
5
0
1.215
1.220
1.225
1.230
EA
ACCURACY (V)
OUT
Figure 24. EAOUT Accuracy Voltage Distribution at −40°C
Rev. 0 | Page 11 of 20
ADuM4190
Data Sheet
TEST CIRCUITS
V
V
DD2
DD1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1µF
1µF
1µF
1µF
GND
GND
V
1
2
V
REG2
REG1
REG
UVLO
Rx
UVLO
REG
REF
REF
+IN
REF
REF
OUT1
NC
OUT
Tx
680Ω
–IN
EA
OUT2
2.2nF
EA
COMP
GND
OUT
GND
1
2
ADuM4190
Figure 27. Test Circuit 1: Accuracy Circuit Using EAOUT
V
V
DD2
DD1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1µF
1µF
1µF
1µF
GND
GND
1
2
V
V
REG2
REG1
OUT1
REG
UVLO
Rx
UVLO
REG
REF
REF
+IN
REF
REF
OUT
R
OD
NC
680Ω
Tx
EA
OUT2
–IN
2.2nF
EA
COMP
OUT
GND
GND
1
2
ADuM4190
Figure 28. Test Circuit 2: Accuracy Circuit Using EAOUT2
V
V
DD2
DD1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1µF
1µF
1µF
1µF
GND
GND
1
2
V
V
REG2
REG1
OUT1
REG
UVLO
Rx
UVLO
REG
REF
REF
REF
REF
+IN
OUT
R
OD
NC
Tx
EA
OUT2
–IN
EA
COMP
GND
OUT
FILTERED
EA
OUT
680Ω
GND
1
2
ADuM4190
470pF
Figure 29. Test Circuit 3: Isolated Amplifier Circuit
Rev. 0 | Page 12 of 20
Data Sheet
ADuM4190
APPLICATIONS INFORMATION
In the test circuits of the ADuM4190 (see Figure 27 through
Figure 29), external supply voltages from 3 V to 20 V are provided
to the VDD1 and VDD2 pins, and internal regulators provide 3.0 V
to operate the internal circuits of each side of the ADuM4190. An
internal precision 1.225 V reference provides the reference for
the 1% accuracy of the isolated error amplifier. UVLO circuits
monitor the VDDx supplies to turn on the internal circuits when
the 2.8 V rising threshold is met and to turn off the error amplifier
outputs to a high impedance state when VDDx falls below 2.6 V.
Figure 30 also shows the linear isolator alone (the blocks from
the op amp output to the ADuM4190 output, labeled as the linear
isolator), which introduces a pole at approximately 400 kHz. This
total Bode plot of the op amp and linear isolator shows that the
phase shift is approximately −180° from the −IN pin to the EAOUT
pin before the crossover frequency. Because a −180° phase shift
can make the system unstable, adding an integrator configuration,
consisting of a 2.2 nF capacitor and a 680 Ω resistor, helps to
make the system stable (see Figure 27 and Figure 28).
AMPLITUDE (dB)
The op amp on the right side of the ADuM4190 has a nonin-
verting +IN pin and an inverting −IN pin available for connecting
a feedback voltage in an isolated dc-to-dc converter output, usually
through a voltage divider. The COMP pin is the op amp output,
which can be used to attach resistor and capacitor components in
a compensation network. The COMP pin internally drives the
Tx transmitter block, which converts the op amp output voltage
into an encoded output that is used to drive the digital isolator
transformer.
100
OP AMP AND
LINEAR ISOLATOR
OP AMP
ALONE
LINEAR ISOLATOR
POLE AT 400kHz
FREQUENCY
(Hz)
100
1k
10k
100k
1M
10M
LINEAR
ISOLATOR
PHASE (°)
100
1k
10k
100k
1M
10M
FREQUENCY
(Hz)
–90
On the left side of the ADuM4190, the Rx block decodes the
PWM signal that is output by the transformer and converts the
signal into a voltage that drives an amplifier block; the amplifier
block produces the error amplifier output available at the EAOUT
pin. The EAOUT pin can deliver 3 mA and has a voltage level
from 0.4 V to 2.4 V, which is typically used to drive the input
of a PWM controller in a dc-to-dc circuit.
–180
Figure 30. Bode Plot 1: Op Amp and Linear Isolator
In Figure 31, Bode Plot 2, with an integrator configuration added,
the system crosses over 0 dB at approximately 100 kHz, but the
circuit is more stable with a phase shift of approximately −120°,
which yields a stable 60° phase margin. This circuit is used for
accuracy tests only, not for real-world applications, because it has
a 680 Ω resistor across the isolation barrier to close the loop for
the error amplifier; this resistor causes leakage current to flow
across the isolation barrier. For this test circuit only, GND1 must
be connected to GND2 to create a return for the leakage current
that is created by the 680 Ω resistor connection.
For an application that requires more output voltage to drive
its controller, the EAOUT2 pin can be used (see Figure 28). The
E
AOUT2 pin delivers up to 1 mA with an output voltage of 0.6 V
to 4.8 V for an output that has a pull-up resistor to a 5 V supply.
If the EAOUT2 pull-up resistor is connected to a 10 V to 20 V supply,
the output is specified to a minimum of 5.0 V to allow use with a
PWM controller that requires a minimum input operation of 5 V.
ACCURACY CIRCUIT OPERATION
AMPLITUDE (dB)
See Figure 27 and Figure 28 for accuracy circuit operation. The
op amp on the right side of the ADuM4190, from the −IN pin to
the COMP pin, has a unity-gain bandwidth (UGBW) of 10 MHz.
Figure 30, Bode Plot 1, shows a dashed line for the op amp alone
and its 10 MHz pole.
OP AMP AND
100
LINEAR ISOLATOR
LINEAR ISOLATOR
POLE AT 400kHz
OP AMP
ALONE
INTEGRATOR
CONFIGURATION
FREQUENCY
(Hz)
100
1k
10k
10k
100k
100k
1M
1M
10M
10M
PHASE (°)
100
1k
FREQUENCY
(Hz)
–90
–180
Figure 31. Bode Plot 2: Op Amp and Linear Isolator
with Integrator Configuration
Rev. 0 | Page 13 of 20
ADuM4190
Data Sheet
The COMP output of the op amp is encoded and then decoded
by the digital isolator transformer block to a signal that drives the
output of the ADuM4190 high. The output of the ADuM4190
drives the COMP pin of the PWM controller, which is designed
to reset the PWM latch output to low only when its COMP pin is
low. A high at the COMP pin of the PWM controller causes the
latching PWM comparator to produce a PWM duty cycle output.
This PWM duty cycle output drives the power stage to increase
the VOUT voltage until it returns to regulation.
ISOLATED AMPLIFIER CIRCUIT OPERATION
Figure 29 shows an isolated amplifier circuit. In this circuit, the
input side amplifier is set as a unity-gain buffer so that the EAOUT
output follows the +IN input. The EAOUT2 output follows the
EAOUT output, but with a voltage gain of 2.6.
This circuit has an open-drain output, which should be pulled
up to a supply voltage from 3 V to 20 V using a resistor value set
for an output current of up to 1 mA. The EAOUT2 output can be
used to drive up to 1 mA to the input of a device that requires
a minimum input operation of 5 V. The EAOUT2 circuit has an
internal diode clamp to protect the internal circuits from voltages
greater than 5 V.
The power stage output is filtered by output capacitance and, in
some applications, by an inductor. Various elements contribute to
the gain and phase of the control loop and the resulting stability.
The output filter components (LO and CO) create a double pole;
the op amp has a pole at 10 MHz (see Figure 30), and the linear
isolator has a pole at 400 kHz (see Figure 30 and Figure 31).
The gain, offset, and linearity of EAOUT and EAOUT2 are specified
in Table 1 using this test circuit. When designing applications
for voltage monitoring using an isolated amplifier, review these
specifications, noting that the 1% accuracy specifications for the
isolated error amplifier do not apply. In addition, the EAOUT circuit
in Figure 29 is shown with an optional external RC low-pass filter
with a corner frequency of 500 kHz, which can reduce the 3 MHz
output noise from the internal voltage to the PWM converter.
The output capacitor and its ESR can add a zero at a frequency
that is dependent on the component type and values. With the
ADuM4190 providing the error amplifier, a compensation network
is provided from the −IN pin to the COMP pin to compensate
the control loop for stability. The compensation network values
depend on both the application and the components that are
selected; information about the component network values is
provided in the data sheet of the selected PWM controller.
APPLICATION BLOCK DIAGRAM
Figure 32 shows a typical application for the ADuM4190: an
isolated error amplifier in primary side control.
PWM CONTROLLER
The ADuM4190 has two different error amplifier outputs:
EAOUT and EAOUT2. The EAOUT output, which can drive 3 mA,
has a guaranteed maximum high output voltage of at least 2.4 V,
which may not be sufficient to drive the COMP pin of some
PWM controllers. The EAOUT2 pin can drive 1 mA and has an
output range that guarantees 5.0 V for a VDD1 voltage range of
10 V to 20 V, which works well with the COMP pin of many
PWM controllers.
V
IN
OSC
V
REF
L
O
ERROR
AMP
V
DCR
OUT
LATCHING
PWM
POWER
STAGE
+
C
O
CURRENT
SENSE
ESR
COMP
FB
COMPENSATION
NETWORK
C
1
C
2
R
2
COMP
EA
OUT2
Figure 32 shows how to use the ADuM4190 to provide isolated
feedback in the control loop of an isolated dc-to-dc converter. In
this application block diagram, the loop is closed at approxi-
mately the 1.225 V reference voltage, providing 1% accuracy
over temperature. The ADuM4190 op amp has a high gain band-
width of 10 MHz to allow the dc-to-dc converter to operate at
high switching speeds, enabling smaller values for the output
filter components (LO and CO).
OP AMP
–IN
+IN
1.225V
ADuM4190
REF
OUT
Figure 32. Application Block Diagram
The op amp of the ADuM4190 is used as the error amplifier for
the feedback of the output voltage, VOUT, using a resistor divider
to the −IN pin of the op amp. is configuration inverts the
output signal at the COMP pin when compared to the +IN pin,
which is connected to the internal 1.225 V reference.
The 400 kHz bandwidth of the ADuM4190 error amplifier output
offers faster loop response for better transient response than the
typical shunt regulator and optocoupler solutions, which typically
have bandwidths of only 25 kHz to 50 kHz maximum.
For example, when the output voltage, VOUT, falls due to a load
step, the divider voltage at the −IN pin falls below the +IN ref-
erence voltage, causing the COMP pin output signal to go high.
Rev. 0 | Page 14 of 20
Data Sheet
ADuM4190
SETTING THE OUTPUT VOLTAGE
DC CORRECTNESS AND MAGNETIC FIELD
IMMUNITY
The output voltage in the application circuit shown in Figure 32
can be set with two resistors in a voltage divider (see Figure 33).
Positive and negative logic transitions at the isolator input cause
narrow (~1 ns) pulses to be sent to the decoder via the transformer.
The decoder is bistable and is, therefore, either set or reset by the
pulses, indicating input logic transitions. If the decoder receives
no internal pulses for more than approximately 3 μs, the input side
is assumed to be unpowered or nonfunctional, and the isolator
output is forced to a default high impedance state by the watch-
dog timer circuit. In addition, the outputs are in a default high
impedance state while the power is increasing before the UVLO
threshold is crossed.
V
OUT
ISOLATED DC-TO-DC SUPPLY
R
R
1
–IN
V
= 0.35V TO 1.5V
IN
+IN
2
ERROR
AMPLIFIER
V
REF
1.225V
REF
OUT
ADuM4190
Figure 33. Setting the Output Voltage
The ADuM4190 is immune to external magnetic fields. The
limitation on the magnetic field immunity of the ADuM4190 is
set by the condition in which the induced voltage in the receiving
coil of the transformer is sufficiently large to either falsely set or
reset the decoder. The following analysis defines the conditions
under which this can occur. The 3 V operating condition of the
ADuM4190 is examined because the internal regulators provide
3 V to operate the internal circuits of each side of the device.
The output voltage is determined by the following equation:
OUT = VREF × (R1 + R2)/R2
V
where VREF = 1.225 V.
DOSA MODULE APPLICATION
Figure 34 is a block diagram of a Distributed-power Open
Standards Alliance (DOSA) circuit using the ADuM4190. The
block diagram shows how to use the 1.225 V reference and the
error amplifier of the ADuM4190 in a DOSA standard power
supply module circuit to produce output voltage settings using
a combination of resistors.
The pulses at the transformer output have an amplitude greater
than 1.0 V. The decoder has a sensing threshold at approximately
0.5 V, thus establishing a 0.5 V margin within which induced
voltages are tolerated. The voltage induced across the receiving
coil is given by
The 1.225 V reference of the ADuM4190 is specified for 1ꢀ
over the −40°C to +125°C temperature range. To set the output
voltage of the module, use Table 10 to select the resistor values.
2
V = (−dβ/dt) ∑ πrn , n = 1, 2, … , N
where:
Two different ranges of VOUT can be implemented, VOUT > 1.5 V
or VOUT < 1.5 V, depending on the required module. Table 10 shows
two sets of resistor values for the VOUT > 1.5 V and VOUT < 1.5 V
ranges; the second set of resistor values (where 5.11 kΩ resistors
are used) consumes less current than the first set.
β is the magnetic flux density (gauss).
rn is the radius of the nth turn in the receiving coil (cm).
N is the number of turns in the receiving coil.
Given the geometry of the receiving coil in the ADuM4190 and
an imposed requirement that the induced voltage be, at most,
50ꢀ of the 0.5 V margin at the decoder, a maximum allowable
magnetic field is calculated as shown in Figure 35.
100
V
OUT
DOSA MODULE
R
R
1
2
R
TRIM-UP
V
= 0.35V TO 1.5V
IN
OPTIONAL TRIM-UP
OR TRIM-DOWN
RESISTOR FOR ±10%
OF NOMINAL VALUE
ACCORDING TO DOSA
ERROR
AMPLIFIER
10
1
R
3
R
R
4
6
R
5
V
R
REF
TRIM-DOWN
1.225V
ADuM4190
0.1
Figure 34. DOSA Module
0.01
0.001
Table 10. Resistor Values for DOSA Module
Module
Nominal Output R3
R4
R5
R6
1k
10k
100k
1M
10M
100M
VOUT > 1.5 V
VOUT < 1.5 V
VOUT > 1.5 V
VOUT < 1.5 V
1 kΩ
1 kΩ
5.11 kΩ
5.11 kΩ
1 kΩ
0 Ω
5.11 kΩ
0 Ω
0 Ω
2.05 kΩ
0 Ω
Open
1.96 kΩ
Open
10.0 kΩ
MAGNETIC FIELD FREQUENCY (Hz)
Figure 35. Maximum Allowable External Magnetic Flux Density
10.5 kΩ
Rev. 0 | Page 15 of 20
ADuM4190
Data Sheet
For example, at a magnetic field frequency of 1 MHz, the maxi-
mum allowable magnetic field of 0.2 kgauss induces a voltage of
0.25 V at the receiving coil. This voltage is approximately 50% of
the sensing threshold and does not cause a faulty output transi-
tion. Similarly, if such an event occurs during a transmitted pulse
(and is of the worst-case polarity), the received pulse is reduced
from >1.0 V to 0.75 V—still well above the 0.5 V sensing threshold
of the decoder.
The values shown in Table 8 summarize the peak voltage for
50 years of service life for a bipolar ac operating condition. In
many cases, the approved working voltage is higher than the
50-year service life voltage. Operation at these high working
voltages can lead to shortened insulation life in some cases.
The insulation lifetime of the ADuM4190 depends on the voltage
waveform type 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 37,
Figure 38, and Figure 39 illustrate these different isolation voltage
waveforms.
The preceding magnetic flux density values correspond to specific
current magnitudes at given distances from the ADuM4190 trans-
formers. Figure 36 shows these allowable current magnitudes
as a function of frequency for selected distances. As shown in
Figure 36, the ADuM4190 is immune and can be affected only by
extremely large currents operating at a high frequency very close
to the component. For the 1 MHz example, a 0.7 kA current must
be placed 5 mm away from the ADuM4190 to affect the operation
of the device.
A bipolar ac voltage environment is the worst case for the iCoupler
products yet meets the 50-year operating lifetime recommended
by Analog Devices for maximum working voltage. 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. Treat any cross-insulation voltage
waveform that does not conform to Figure 38 or Figure 39 as a
bipolar ac waveform, and limit its peak voltage to the 50-year
lifetime voltage value listed in Table 8.
1000
DISTANCE = 1m
100
Note that the voltage presented in Figure 38 is shown as sinu-
soidal 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.
10
DISTANCE = 100mm
1
DISTANCE = 5mm
0.1
RATED PEAK VOLTAGE
0V
0.01
Figure 37. Bipolar AC Waveform
1k
10k
100k
1M
10M
100M
MAGNETIC FIELD FREQUENCY (Hz)
Figure 36. Maximum Allowable Current for Various
Current-to-ADuM4190 Spacings
RATED PEAK VOLTAGE
INSULATION LIFETIME
0V
All insulation structures eventually break down when subjected
to voltage stress over a sufficiently long period. The rate of insu-
lation 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 ADuM4190.
Figure 38. Unipolar AC Waveform
RATED PEAK VOLTAGE
0V
Figure 39. DC Waveform
Analog Devices performs accelerated life testing using voltage
levels higher than the rated continuous working voltage. Accel-
eration factors for several operating conditions are determined.
These factors allow calculation of the time to failure at the actual
working voltage.
Rev. 0 | Page 16 of 20
Data Sheet
ADuM4190
OUTLINE DIMENSIONS
12.85
12.75
12.65
1.93 REF
16
9
8
7.60
7.50
7.40
10.51
10.31
10.11
1
PIN 1
MARK
0.71
0.50 45°
0.31
0.25 BSC
2.64
2.54
2.44
2.44
2.24
GAGE
0.32
0.23
PLANE
0.30
0.20
0.10
SEATING
PLANE
8°
0°
1.27 BSC
1.01
0.76
0.51
0.46
0.36
COPLANARITY
0.1
COMPLIANT TO JEDEC STANDARDS MS-013-AC
Figure 40. 16-Lead Standard Small Outline Package, with Increased Creepage [SOIC_IC]
Wide Body
(RI-16-2)
Dimensions shown in millimeters
ORDERING GUIDE
Model1, 2
Temperature Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Bandwidth (Typical)
200 kHz
200 kHz
400 kHz
400 kHz
200 kHz
200 kHz
400 kHz
400 kHz
Package Description
16-Lead SOIC_IC
16-Lead SOIC_IC
16-Lead SOIC_IC
16-Lead SOIC_IC
16-Lead SOIC_IC
16-Lead SOIC_IC
16-Lead SOIC_IC
16-Lead SOIC_IC
Evaluation Board
Package Option
RI-16-2
RI-16-2
RI-16-2
RI-16-2
RI-16-2
RI-16-2
RI-16-2
RI-16-2
ADuM4190ARIZ
ADuM4190ARIZ-RL
ADuM4190BRIZ
ADuM4190BRIZ-RL
ADuM4190SRIZ
ADuM4190SRIZ-RL
ADuM4190TRIZ
ADuM4190TRIZ-RL
EVAL-ADuM3190EBZ
1 Z = RoHS Compliant Part.
2 The EVAL-ADuM3190EBZ can be used to evaluate the ADuM3190 and the ADuM4190.
Rev. 0 | Page 17 of 20
ADuM4190
NOTES
Data Sheet
Rev. 0 | Page 18 of 20
Data Sheet
NOTES
ADuM4190
Rev. 0 | Page 19 of 20
ADuM4190
NOTES
Data Sheet
©2013 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D11336-0-7/13(0)
Rev. 0 | Page 20 of 20
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