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Full/Low Speed 5 kV USB Digital Isolator

Data Sheet

ADuM4160

Rev. D

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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 V

BUS

operation

7 mA maximum upstream supply current @ 1.5 Mbps

8 mA maximum upstream supply current @ 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 version

16-lead SOIC wide body enhanced creepage version

RoHS compliant

Safety and regulatory approvals (RI-16 package)

UL recognition: 5000 V rms for 1 minute per

UL 1577

CSA Component Acceptance Notice #5A

IEC 60601-1: 250 V rms (reinforced)

IEC 60950-1: 400 V rms (reinforced)

VDE Certificate of Conformity

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

IORM

= 846 V peak

APPLICATIONS

USB peripheral isolation

Isolated USB hub

Medical applications

GENERAL DESCRIPTION

The ADuM4160

is a USB port isolator, based on Analog Devices,

Inc., iCoupler® technology. Combining high speed CMOS and

monolithic air core transformer technology, these isolation

components provide outstanding performance characteristics

and are easily integrated with low and full speed USB-compatible

peripheral devices.

FUNCTIONAL BLOCK DIAGRAM

BUS1

GND

DD1

UD+

GND

PDEN

BUS2

GND

DD2

DD–

DD+

GND

SPD

SPU

UD–

REG

PU LOGIC

REG

08171-001

PD LOGIC

Figure 1.

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. USB lines must automatically switch between

actively driving D+/D−, receiving data, and allowing external

resistors to set the idle state of the bus. The ADuM4160 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 ADuM4160 uses the edge detection based iCoupler tech-

nology in conjunction with internal logic to implement a

transparent, easily configured, upstream facing port isolator.

Isolating an upstream facing port provides several advantages

in simplicity, power management, and robust operation.

The isolator has 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 V

BUS

by internally regulating the voltage to the signaling

level. The ADuM4160 provides isolated control of the pull-up

resistor to allow the peripheral to control connection timing.

The device has a low idle current; so a suspend mode is not

required. A 2.5 kV version, the ADuM3160, is also available.

Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329.

Summary of content (16 pages)

PAGE 1
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 @ 1.5 Mbps 8 mA maximum upstream supply current @ 12 Mbps 2.3 mA maximum upstream idle current Upstream short-circuit protection Class 3A contact ESD performance per ANSI/ESD STM5.
PAGE 2
ADuM4160 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................7 Applications....................................................................................... 1 ESD Caution...................................................................................7 General Description .........................................................
PAGE 3
Data Sheet ADuM4160 SPECIFICATIONS ELECTRICAL CHARACTERISTICS 4.5 V ≤ VBUS1 ≤ 5.5 V, 4.5 V ≤ VBUS2 ≤ 5.5 V; 3.1 V ≤ VDD1 ≤ 3.6 V, 3.1 V ≤ VDD2 ≤ 3.6 V; all minimum/maximum specifications apply over the entire recommended operation range, unless otherwise noted; all typical specifications are at TA = 25°C, VDD1 = VDD2 = 3.3 V. Each voltage is relative to its respective ground. Table 1. Parameter DC SPECIFICATIONS Total Supply Current1 1.
PAGE 4
ADuM4160 Data Sheet Parameter For All Operating Modes Common-Mode Transient Immunity At Logic High Output 3 At Logic Low Output3 Symbol Min Typ |CMH| 25 35 |CML| 25 35 Max Unit Test Conditions kV/μs VUD+, VUD−, VDD+, VDD− = VDD1 or VDD2, VCM = 1000 V, transient magnitude = 800 V kV/μs VUD+, VUD−, VDD+, VDD− = 0 V, VCM = 1000 V, transient magnitude = 800 V 1 The supply current values for the device running at a fixed continuous data rate at 50% duty cycle alternating J and K states.
PAGE 5
Data Sheet ADuM4160 INSULATION AND SAFETY-RELATED SPECIFICATIONS Table 4. Parameter Rated Dielectric Insulation Voltage Minimum External Air Gap (Clearance) Symbol L(I01) Value 5000 8.0 min Unit V rms mm Minimum External Tracking (Creepage) RW-16 Package L(I02) 7.7 min mm Minimum External Tracking (Creepage) RI-16 Package L(I02) 8.3 min mm Minimum Internal Gap (Internal Clearance) Tracking Resistance (Comparative Tracking Index) Isolation Group 0.
PAGE 6
ADuM4160 Data Sheet RECOMMENDED OPERATING CONDITIONS Table 6. Parameter Operating Temperature Supply Voltages 1 Input Signal Rise and Fall Times 1 Symbol TA VBUS1, VBUS2 Min −40 3.1 Max +105 5.5 1.0 Unit °C V ms All voltages are relative to their respective ground. See the DC Correctness and Magnetic Field Immunity section for information on immunity to external magnetic fields. Rev.
PAGE 7
Data Sheet ADuM4160 ABSOLUTE MAXIMUM RATINGS Ambient temperature = 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.
PAGE 8
ADuM4160 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VBUS1 1 16 VBUS2 GND1* 2 VDD1 3 PDEN 4 15 GND2* ADuM4160 14 VDD2 SPU 5 13 SPD TOP VIEW (Not to Scale) 12 PIN UD– 6 11 DD– UD+ 7 10 DD+ GND1* 8 9 GND2* *PIN 2 AND PIN 8 ARE INTERNALLY CONNECTED, AND CONNECTING BOTH TO GND1 IS RECOMMENDED. PIN 9 AND PIN 15 ARE INTERNALLY CONNECTED, AND CONNECTING BOTH TO GND2 IS RECOMMENDED. 08171-003 NC = NO CONNECT Figure 3. Pin Configuration Table 9. Pin Function Descriptions Pin No.
PAGE 9
Data Sheet ADuM4160 Table 10.
PAGE 10
ADuM4160 Data Sheet APPLICATIONS INFORMATION FUNCTIONAL DESCRIPTION PRODUCT USAGE USB isolation in the D+/D− lines is challenging for several reasons. First, access to the output enable signals is normally required to control a transceiver. Some level of intelligence must be built into the isolator to interpret the data stream and determine when to enable and disable its upstream and downstream output buffers.
PAGE 11
Data Sheet ADuM4160 COMPATIBILITY OF UPSTREAM APPLICATIONS PRINTED CIRCUIT BOARD (PCB) LAYOUT The ADuM4160 is designed specifically for isolating a USB peripheral. However, the chip does have 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.
PAGE 12
ADuM4160 Data Sheet DISTANCE = 100mm 1 DISTANCE = 5mm 0.1 1k where: β is magnetic flux density (gauss). N is the number of turns in the receiving coil. rn is the radius of the nth turn in the receiving coil (cm). 10k 100k 1M 10M MAGNETIC FIELD FREQUENCY (Hz) 100M Figure 7. Maximum Allowable Current for Various Current-to-ADuM4160 Spacings Given the geometry of the receiving coil in the ADuM4160 and an imposed requirement that the induced voltage is, at most, 50% of the 0.
PAGE 13
Data Sheet ADuM4160 In the case of unipolar ac or dc voltage, the stress on the insulation is significantly lower. This allows operation at higher working voltages and still achieves a 50-year service life. The working voltages listed in Table 8 can be applied while maintaining the 50-year minimum lifetime, provided that the voltage conforms to either the unipolar ac or dc voltage cases.
PAGE 14
ADuM4160 Data Sheet OUTLINE DIMENSIONS 10.50 (0.4134) 10.10 (0.3976) 9 16 7.60 (0.2992) 7.40 (0.2913) 1 10.65 (0.4193) 10.00 (0.3937) 8 1.27 (0.0500) BSC 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 0.75 (0.0295) 45° 0.25 (0.0098) 2.65 (0.1043) 2.35 (0.0925) SEATING PLANE 0.51 (0.0201) 0.31 (0.0122) 8° 0° 1.27 (0.0500) 0.40 (0.0157) 0.33 (0.0130) 0.20 (0.
PAGE 15
Data Sheet ADuM4160 NOTES Rev.