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PDF ADUM3160 Data sheet ( Hoja de datos )
| Número de pieza | ADUM3160 | |
| Descripción | Full/Low Speed 2.5 kV USB Digital Isolator | |
| Fabricantes | Analog Devices | |
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Data Sheet
Full/Low Speed 2.5 kV USB Digital Isolator
ADuM3160
FEATURES
USB 2.0 compatible
Low and full speed data rate: 1.5 Mbps and 12 Mbps
Bidirectional communication
4.5 V to 5.5 V VBUS operation
7 mA maximum upstream supply current at 1.5 Mbps
8 mA maximum upstream supply current at 12 Mbps
2.3 mA maximum upstream idle current
Upstream short-circuit protection
Class 3A contact ESD performance per ANSI/ESD STM5.1-2007
High temperature operation: 105°C
High common-mode transient immunity: >25 kV/μs
16-lead SOIC wide body package
RoHS compliant
Qualified for automotive applications
Safety and regulatory approvals
UL recognition: 2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
IEC 60950-1: 600 V rms (basic)
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 V peak
APPLICATIONS
USB peripheral isolation
Isolated USB hub
GENERAL DESCRIPTION
The ADuM31601 is a USB port isolator based on Analog
Devices, Inc., iCoupler® technology. Combining high speed CMOS
and monolithic air core transformer technology, this isolation
component provides outstanding performance characteristics
and is easily integrated with low and full speed USB-compatible
peripheral devices.
Many microcontrollers implement USB so that it presents only the
D+ and D− lines to external pins. This is desirable in many cases
because it minimizes external components and simplifies the
design; however, this presents particular challenges when isolation
is required. Because the USB lines must switch between actively
driving D+/D− and allowing external resistors to set the state of
the bus, the ADuM3160 provides mechanisms for detecting the
direction of data flow and control over the state of the output
buffers. Data direction is determined on a packet-by-packet basis.
The ADuM3160 uses the edge detection based iCoupler
technology in conjunction with internal logic to implement
a transparent, easily configured, upstream-facing port isolator.
Isolating the upstream port provides several advantages in
simplicity, power management, and robust operation.
The isolator has a propagation delay comparable to that of a
standard hub and cable. It operates with the bus voltage on either
side ranging from 4.5 V to 5.5 V, allowing connection directly to
VBUSx by internally regulating the voltage to the signaling level.
The ADuM3160 provides isolated control of the pull-up resistor
to allow the peripheral to control connection timing. The device
draws low enough idle current that a suspend state is not required.
A 5 kV, reinforced insulation version, the ADuM4160, is available.
FUNCTIONAL BLOCK DIAGRAM
VBUS1 1
GND1 2
VDD1 3
PDEN 4
SPU 5
UD– 6
UD+ 7
GND1 8
REG
PU LOGIC
Figure 1.
PD LOGIC
REG
16 VBUS2
15 GND2
14 VDD2
13 SPD
12 PIN
11 DD–
10 DD+
9 GND2
1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329; and 8,432,812.
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 ©2010–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
ADuM3160
Data Sheet
Parameter
For All Operating Modes
Common-Mode Transient Immunity
at Logic High Output4
Common-Mode Transient Immunity
at Logic Low Output4
Symbol Min Typ Max Unit Test Conditions/Comments1
|CMH|
25
|CML|
25
35
35
kV/µs
kV/µs
VUD+, VUD−, VDD+, VDD− = VDD1 or VDD2,
VCM = 1000 V, transient magnitude =
800 V
VUD+, VUD−, VDD+, VDD− = 0 V, VCM =
1000 V, transient magnitude = 800 V
1 CL = load capacitance, RL = test load resistance, VL = test load voltage, and VCM = common-mode voltage.
2 The supply current values are for the device running at a fixed continuous data rate 50% duty cycle, alternating J and K states. Supply current values are specified with
USB-compliant load present.
3 Propagation delay of DD+ to UD+ or DD− to UD− in either signal direction is measured from the 50% level of the rising or falling edge to the 50% level of the rising or
falling edge of the corresponding output signal.
4 CMH is the maximum common-mode voltage slew rate that can be sustained while maintaining VO > 0.8 VDD2. CML is the maximum common-mode voltage slew rate
that can be sustained while maintaining VO < 0.8 V. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges. The transient
magnitude is the range over which the common mode is slewed.
PACKAGE CHARACTERISTICS
Table 2.
Parameter
Resistance (Input to Output)1
Capacitance (Input to Output)1
Input Capacitance2
IC Junction-to-Ambient Thermal Resistance
Symbol Min Typ Max Unit Test Conditions/Comments
RI-O 1012 Ω
CI-O 2.2 pF f = 1 MHz
CI 4.0 pF
θJA 45 °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 data pin to ground.
REGULATORY INFORMATION
The ADuM3160 has been approved by the organizations listed in Table 3. For more information about the recommended maximum
working voltages for specific cross-insulation waveforms and insulation levels, see Table 8 and the Insulation Lifetime section.
Table 3.
UL
Recognized under UL 1577 component
recognition program1
Single protection, 2500 V rms isolation
voltage
File E214100
CSA
Approved under CSA Component Acceptance Notice #5A
Basic insulation per CSA 60950-1-07 and IEC 60950-1,
600 V rms (849 V peak) maximum working voltage
File 205078
VDE
Certified according to DIN V VDE V
0884-10 (VDE V 0884-10):2006-122
Reinforced insulation, 560 V peak
File 2471900-4880-0001
1 In accordance with UL 1577, each ADuM3160 is proof tested by applying an insulation test voltage ≥ 3000 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 ADuM3160 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 indicates DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 approval.
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 4.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Symbol
L(I01)
Value
2500
8.0 min
Unit
V
mm
Minimum External Tracking (Creepage)
L(I02)
7.7 min mm
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
CTI
0.017 min
>175
IIIa
mm
V
Test Conditions/Comments
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
Insulation distance through insulation
DIN IEC 112/VDE 0303, Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
Rev. C | Page 4 of 16
5 Page 
ADuM3160
COMPATIBILITY OF UPSTREAM APPLICATIONS
The ADuM3160 is designed specifically for isolating a USB
peripheral. However, the chip has two USB interfaces that meet
the electrical requirements for driving USB cables. This opens the
possibility of implementing isolation in downstream USB ports
such as isolated cables, which have generic connections to both
upstream and downstream devices, as well as isolating host ports.
In a fully compliant application, a downstream-facing port must
be able to detect whether a peripheral is low speed or full speed
based on the application of the upstream pull-up. The buffers
and logic conventions must adjust to match the requested speed.
Because the ADuM3160 sets its speed by hardwiring pins, the
part cannot adjust to different peripherals on the fly.
The practical result of using the ADuM3160 in a host port is
that the port works at a single speed. This behavior is acceptable
in embedded host applications; however, this type of interface is
not fully compliant as a general-purpose USB port.
Isolated cable applications have a similar issue. The cable operates
at the preset speed only; therefore, treat cable assemblies as custom
applications, not general-purpose isolated cables.
POWER SUPPLY OPTIONS
In most USB transceivers, 3.3 V is derived from the 5 V USB bus
through an LDO regulator. The ADuM3160 includes internal
LDO regulators on both the upstream and downstream sides. The
output of the LDO regulators is available on the VDD1 and VDD2 pins.
In some cases, especially on the peripheral side of the isolation,
there may not be a 5 V power supply available. The ADuM3160
has the ability to bypass the regulator and run on a 3.3 V supply
directly.
Two power pins are present on each side, VBUSx and VDDx. If 5 V
is supplied to VBUSx, an internal regulator creates 3.3 V to power
the xD+ and xD− drivers. VDDx provides external access to the
3.3 V supply to allow external bypass as well as bias for external
pull-ups. If only 3.3 V is available, it can be supplied to both VBUSx
and VDDx. This disables the regulator and powers the coupler
directly from the 3.3 V supply.
Figure 5 shows how to configure a typical application when the
upstream side of the coupler receives power directly from the USB
bus and the downstream side receives 3.3 V from the peripheral
power supply. The downstream side can run from a 5 V VBUS2
power supply as well. It can be connected in the same manner
as VBUS1, as shown in Figure 5, if needed.
Data Sheet
PRINTED CIRCUIT BOARD LAYOUT
The ADuM3160 digital isolator requires no external interface
circuitry for the logic interfaces. For full speed operation, the D+
and D− lines on each side of the device require a 24 Ω ± 1% series
termination resistor. These resistors are not required for low speed
applications. Power supply bypassing is required at the input and
output supply pins (see Figure 5). Install bypass capacitors between
VBUSx and VDDx on each side of the chip. The capacitors should have
a minimum value of 0.1 µF and low ESR. The total lead length
between both ends of the capacitor and the power supply pin
should not exceed 10 mm.
Bypassing between Pin 2 and Pin 8 and between Pin 9 and Pin 15
should also be considered unless the ground pair on each package
side is connected close to the package. All logic level signals are
3.3 V and should be referenced to the local VDDx pin or 3.3 V logic
signals from an external source.
VBUS1 = 5.0V INPUT
VDD1 = 3.3V OUTPUT
VBUS2 = 3.3V INPUT
VDD2 = 3.3V INPUT
VBUS1
GND1
VDD1
VBUS2
GND2
VDD2
PDEN
SPU
ADuM3160
SPD
PIN
UD–
DD–
UD+
DD+
GND1
GND2
Figure 5. Suggested PCB Layout Example
In applications that involve high common-mode transients, care
should be taken to minimize board coupling across the isolation
barrier. 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
that exceed the absolute maximum ratings of the device, thereby
leading to latch-up or permanent damage.
DC CORRECTNESS AND MAGNETIC FIELD
IMMUNITY
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.
The limitation on the magnetic field immunity of the ADuM3160
is set by the condition in which 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 may occur. The 3 V operating condition of the
ADuM3160 is examined because it represents the most suscep-
tible mode of operation.
Rev. C | Page 10 of 16
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ADUM3160.PDF ] | |
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