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ADM3260 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADM3260
Beschreibung Dual I2C Isolators
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 20 Seiten
ADM3260 Datasheet, Funktion
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
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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
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ADM3260 Datasheet, Funktion
Data Sheet
ADM3260
DIGITAL ISOLATOR DC SPECIFICATIONS
All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical specifications are
at TA = 25°C, VDDISO = 3.3 V or 5 V, and VDDP = 3.3 V or 5 V, unless otherwise noted. All voltages are relative to their respective ground.
Table 6.
Parameter
I2C SIGNAL ISOLATION BLOCK
Input Supply Current
Side 1 (5 V)
Side 2 (5 V)
Side 1 (3.3 V)
Side 2 (3.3 V)
LEAKAGE CURRENTS
SIDE 1 LOGIC LEVELS
Logic Input Threshold1
Logic Low Output Voltages
Input/Output Logic Low Level Difference2
SIDE 2 LOGIC LEVELS
Input Voltage
Logic Low
Logic High
Output Voltage
Logic Low
Symbol
Min Typ Max Unit Test Conditions/Comments
IDDISO1
IDDP1
IDDISO2
IDDP2
ISDA1, ISDA2, ISCL1, ISCL2
VSDA1T, VSCL1T
VSDA1OL, VSCL1OL
ΔVSDA1, ΔVSCL1
500
600
600
50
2.8 5.0
2.7 5.0
1.9 3.0
1.7 3.0
0.01 10
700
900
850
mA VDDISO = 5 V
mA VDDP = 5 V
mA VDDISO = 3.3 V
mA VDDP = 3.3 V
μA VSDA1 = VDDISO, VSDA2 = VDDP,
VSCL1 = VDDISO, VSCL2 = VDDP
mV
mV ISDA1 = ISCL1 = 3.0 mA
mV ISDA1 = ISCL1 = 0.5 mA
mV
VSDA2IL, VSCL2IL
VSDA2IH, VSCL2IH
VSDA2OL, VSCL2OL
0.7 VDDP
0.3 VDDP V
V
400 mV ISDA2 = ISCL2 = 30 mA
1 VIL < 0.5 V, VIH > 0.7 V.
2 ΔVSDA1 = VSDA1OL – VSDA1T, ΔVSCL1 = VSCL1OL – VSCL1T. This is the minimum difference between the output logic low level and the input logic threshold within a given
component. This ensures that there is no possibility of the device latching up the bus to which it is connected.
DIGITAL ISOLATOR AC SPECIFICATIONS
All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical specifications
are at TA = 25°C, VDDISO = 3.3 V or 5 V, and VDDP = 3.3 V or 5 V, unless otherwise noted. Refer to Figure 17. All voltages are relative to
their respective ground.
Table 7.
Parameter
MAXIMUM FREQUENCY
OUTPUT FALL TIME
5 V Operation
Symbol
Side 1 Output (0.9 VDDISO to 0.9 V)
Side 2 Output (0.9 VDDP to 0.1 VDDP)
3 V Operation
tf1
tf2
Side 1 Output (0.9 VDDISO to 0.9 V)
Side 2 Output (0.9 VDDP to 0.1 VDDP)
PROPAGATION DELAY
5 V Operation
tf1
tf2
Side 1 to Side 2
Rising Edge1
Falling Edge2
tPLH12
tPHL12
Min Typ Max Unit Test Conditions/Comments
1000
kHz
13 26 120 ns
32 52 120 ns
13 32 120 ns
32 61 120 ns
4.5 V ≤ VDDISO, VDDP ≤ 5.5 V, CL1 = 40 pF,
R1 = 1.6 kΩ, CL2 = 400 pF, R2 = 180 Ω
3.0 V ≤ VDDISO, VDDP ≤ 3.6 V, CL1 = 40 pF,
R1 = 1.0 kΩ, CL2 = 400 pF, R2 = 120 Ω
4.5 ≤ VDDISO, VDDP ≤ 5.5 V, CL1 = CL2 = 0 pF,
R1 = 1.6 kΩ, R2 = 180 Ω
95 130 ns
162 275 ns
Rev. C | Page 5 of 19

6 Page









ADM3260 pdf, datenblatt
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADM3260
GNDP
SCL2
SDA2
VDDP
GNDP
NC
GNDP
PDIS
VIN
GNDP
1
2
3
4
5
6
7
8
9
10
ADM3260
TOP VIEW
(Not to Scale)
20 GNDISO
19 SCL1
18 SDA1
17 VDDISO
16 GNDISO
15 NC
14 GNDISO
13 VSEL
12 VISO
11 GNDISO
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN
Figure 4. Pin Configuration
Table 16. Pin Function Descriptions
Pin No.
Mnemonic Description
1, 5, 7 ,10
GNDP
Ground Reference for Primary Side. Connect all GNDP pins to the primary ground reference.
2
SCL2
Clock Input/Output, Primary Side.
3
SDA2
Data Input/Output, Primary Side.
4
VDDP
Digital Isolator Primary Supply Input, 3.0 V to 5.5 V.
6, 15 NC No Connect. Do not connect to this pin.
8 PDIS Power Disable. When PDIS is tied to VIN, the power supply enters low power standby mode. When PDIS is tied
to GNDP, the power converter is active.
9 VIN isoPower Converter Primary Supply Input, 3.0 V to 5.5 V.
11, 14, 16, 20 GNDISO
Ground Reference for Isolated Side. Connect all GNDISO pins to the isolated ground reference.
12 VISO Secondary Supply Voltage Output for Digital Isolator Isolated Side Power and External Loads. The output
voltage is adjustable from 3.15 V to 5.25 V.
13 VSEL Output Voltage Set. Provide a thermally matched resistor network between VISO and GNDISO to divide the
required output voltage to match the 1.25 V reference voltage. The VISO voltage can be programmed up to
20% higher or 75% lower than VIN but must be within the allowed output voltage range.
17
VDDISO
Digital Isolator Isolated Side Supply Input, 3.0 V to 5.5 V.
18
SDA1
Data Input/Output, Isolated Side.
19
SCL1
Clock Input/Output, Isolated Side.
Rev. C | Page 11 of 19

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