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PDF ADM3260 Data sheet ( Hoja de datos )
| Número de pieza | ADM3260 | |
| Descripción | Dual I2C Isolators | |
| Fabricantes | Analog Devices | |
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Data Sheet
Hot Swappable, Dual I2C Isolators with
Integrated DC-to-DC Converter
ADM3260
FEATURES
isoPower integrated, isolated dc-to-dc converter
Regulated 3.15 V to 5.25 V output
Up to 150 mW output power
High common-mode transient immunity: >25 kV/μs
iCoupler integrated I2C digital isolator
Bidirectional I2C communication
3.0 V to 5.5 V supply/logic levels
Open-drain interfaces
Suitable for hot swap applications
30 mA current sink capability
1000 kHz maximum frequency
20-lead SSOP package with 5.3 mm creepage
High temperature operation: 105°C
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)
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 V peak
APPLICATIONS
Isolated I2C, SMBus, and PMBus interfaces
Multilevel I2C interfaces
Central office switching
Telecommunication and data communication equipment
−48 V distributed power systems
−48 V power supply modules
Networking
GENERAL DESCRIPTION
Based on the iCoupler® and isoPower® chip scale transformer
technology, the ADM32601 is a hot swappable digital and power
isolator with two nonlatching, bidirectional communication
channels, supporting a complete isolated I2C interface, and an
integrated isolated dc-to-dc converter, supporting up to
150 mW of isolated power conversion.
iCoupler is a chip scale transformer technology with functional,
performance, size, and power consumption advantages as
compared to optocouplers. The bidirectional I2C channels
eliminate the need for splitting I2C signals into separate transmit
and receive signals for use with standalone optocouplers.
FUNCTIONAL BLOCK DIAGRAM
ADM3260
GNDP
SCL2
SDA2
VDDP
GNDP
DECODE
ENCODE
ENCODE
DECODE
DECODE
ENCODE
ENCODE
DECODE
SIGNAL ISOLATION
GNDISO
SCL1
SDA1
VDDISO
GNDISO
NC
GNDP
POWER ISOLATION
NC
GNDISO
PDIS
PCS
VSEL
VIN
GNDP
OSC
RECT REG
VISO
GNDISO
Figure 1.
Table 1. Power Levels for Isolated Converter
Input Voltage (V) Output Voltage (V) Output Power (mW)
5.0 5.0
150
5.0 3.3
150
3.3 3.3
66
Based on the Analog Devices, Inc., isoPower technology, the
on-chip isolated dc-to-dc converter provides a regulated, isolated
voltage of 3.15 V to 5.25 V with up to 150 mW of output power
(see Figure 1).
With the ADM3260, the iCoupler and isoPower channels, along
with the I2C transceivers, can be integrated with semiconductor
circuitry, which enables a complete isolated I2C interface and
allows the power converter to be implemented in a small form
factor. The ADM3260 is available in 20-lead SSOP package and
has an operating temperature range of −40°C to+105°C.
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.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents are pending.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2013–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
ADM3260
Data Sheet
ELECTRICAL CHARACTERISTICS—3.3 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY
All typical specifications are at TA = 25°C, VIN = VISO = 3.3 V, VSEL resistor network RBOTTOM = 10 kΩ, RTOP = 16.9 kΩ. Minimum/maximum
specifications apply over the entire recommended operation range which is 3.0 V ≤ VIN, VISO ≤ 3.6 V, and −40°C ≤ TA ≤ +105°C, unless
otherwise noted. Switching specifications are tested with CL = 15 pF and CMOS signal levels, unless otherwise noted.
Table 4.
Parameter
Symbol Min Typ Max Unit
Test Conditions/Comments
DC-TO-DC CONVERTER SUPPLY
Setpoint
VISO 3.3 V IISO = 10 mA, RBOTTOM = 10 kΩ, RTOP = 16.9 kΩ
Thermal Coefficient
Line Regulation
Load Regulation
Output Ripple
VISO (TC)
VISO (LINE)
VISO (LOAD)
VISO (RIP)
Output Noise
Switching Frequency
Pulse-Width Modulation Frequency
Output Current
VISO (NOISE)
fOSC
fPWM
IISO (MAX)
20
−26
20
1.3 3
50
130
125
600
μV/°C
mV/V
%
mV p-p
mV p-p
MHz
kHz
mA
IISO = 20 mA
IISO = 10 mA, VIN = 3.0 V to 3.6 V
IISO = 2 mA to 18 mA
20 MHz bandwidth, COUTPUT_BYPASS = 0.1 μF||10 μF,
IISO = 18 mA
COUTPUT_BYPASS = 0.1 μF||10 μF, IISO = 18 mA
3.6 V > VISO > 3 V
Efficiency at IISO (MAX)
27 % IISO = 18 mA
IVIN, No VISO Load
IVIN (Q)
3.3 10.5 mA
IVIN, Full VISO Load
Thermal Shutdown
IVIN (MAX) 77 mA
Shutdown Temperature
Thermal Hysteresis
TSHUTDOWN
THYST
154
10
°C
°C
DC-TO-DC CONVERTER CHARACTERISTICS
All typical specifications are at TA = 25°C. Minimum/maximum specifications apply over the entire recommended operation range unless
otherwise noted. Switching specifications are tested with CL = 15 pF and CMOS signal levels, unless otherwise noted.
Table 5.
Parameter
UNDERVOLTAGE LOCKOUT
Positive Going Threshold
Negative Going Threshold
PDIS PIN
Input Threshold
Logic High
Logic Low
Input Current
Symbol
VUV+
VUV−
Min
Typ Max
2.7
2.4
Unit Test Conditions/Comments
VIN, VISO supply
V
V
VIH 0.7 VIN
V
VIL 0.3 VIN V
IPDIS −10 +0.01 +10 μA 0 V ≤ VPDIS ≤ VIN
Rev. C | Page 4 of 19
5 Page 
ADM3260
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 13.
Parameter
Storage Temperature (TST)
Ambient Operating Temperature (TA)
Supply Voltages (VIN, VISO)1
Supply Voltages (VDDISO, VDDP)1
VISO Supply Current2
TA = −40°C to +105°C
Digital Isolator Average Output
Current per Pin3
Side 1 (IO1)
Side 2 (IO2)
Input/Output Voltage
Side 1 (VSDA1, VSCL1)3
Side 2 (VSDA2, VSCL2)3
Input Voltage (PDIS, VSEL)1, 4
Common-Mode Transients5
Rating
−55°C to +150°C
−40°C to +105°C
−0.5 V to +7.0 V
−0.5 V to +7.0 V
30 mA
±18 mA
±100 mA
−0.5 V to VDDISO + 0.5 V
−0.5 V to VDDP + 0.5 V
−0.5 V to VIN + 0.5 V
−100 kV/μs to +100 kV/μs
1 All voltages are relative to their respective ground.
2 VISO provides current for dc and dynamic loads on the VISO input/output
channels. This current must be included when determining the total VISO
supply current.
3 See Figure 3 for maximum rated current values for various temperatures.
4 VCC can be either VIN or VISO depending on the whether the input is on the
primary or secondary side of the device, respectively.
5 Refers to common-mode transients across the insulation barrier. Common-mode
transients exceeding the absolute maximum ratings may cause latch-up or
permanent damage.
Data Sheet
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
Table 14. Maximum Continuous Working Voltage Supporting 50-Year Minimum Lifetime1
Parameter
Maximum
Unit Applicable Certification
AC Voltage
Bipolar Waveform
560
V peak
All certifications, 50-year operation
Unipolar Waveform
560 V peak
DC Voltage
|DC Peak Voltage|
560 V peak
1 Refers to the continuous voltage magnitude imposed across the isolation barrier. See the Insulation Lifetime section for more information.
VISO VOLTAGE TRUTH TABLE
Table 15. Truth Table (Positive Logic)
VIN (V)
VSEL Input
5 RBOTTOM = 10 kΩ, RTOP = 30.9 kΩ
5 RBOTTOM = 10 kΩ, RTOP = 30.9 kΩ
3.3 RBOTTOM = 10 kΩ, RTOP = 16.9 kΩ
3.3 RBOTTOM = 10 kΩ, RTOP = 16.9 kΩ
5 RBOTTOM = 10 kΩ, RTOP = 16.9 kΩ
5 RBOTTOM = 10 kΩ, RTOP = 16.9 kΩ
3.3 RBOTTOM = 10 kΩ, RTOP = 30.9 kΩ
3.3 RBOTTOM = 10 kΩ, RTOP = 30.9 kΩ
PDIS Input
Low
High
Low
High
Low
High
Low
High
VISO Output (V)
5
0
3.3
0
3.3
0
5
0
Notes
Configuration not recommended
Rev. C | Page 10 of 19
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ADM3260.PDF ] | |
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