LTM2894

1

Rev A

For more information www.analog.com

TYPICAL APPLICATION

FEATURES

DESCRIPTION

Isolated USB Data

Transceiver

The LTM®2894 is a complete galvanically-isolated USB 2.0

compatible μModule® (micromodule) transceiver.

The LTM2894 is ideal for isolation in host, hub, bus split-

ter or peripheral device applications. It is compatible with

USB 2.0 full speed (12Mbps) and low speed (1.5Mbps)

operation.Automaticspeedselectionconfiguresintegrated

pull-up resistors on the upstream port to match those

sensed on the downstream device.

The isolator µModule technology uses coupled inductors

to provide 7500VRMSofisolationand17.4mmofcreepage

between the upstream and downstream USB interface.

This device is ideal for systems requiring isolated ground

returnsorlargecommonmodevoltagevariations.Uninter-

rupted communication is guaranteed for common mode

transients greater than 50kV/μs.

Enhanced ESD protection allows this part to withstand

up to ±20kV (human body model) on the USB transceiver

interface pins to local supplies and ±20kV through the

isolation barrier to supplies without latchup or damage.

Isolated V2.0 Full Speed Hub Port

Full Speed Data

APPLICATIONS

n

Isolated USB Transceiver: 7500VRMS for 1 Minute

n

CSA (IEC/UL) Approved, File #255632

n

Reinforced Insulation

n

USB 2.0 Full Speed and Low Speed Compatible

n

Auto-Configuration of Bus Speed

n

4.4V to 36V VBUS and VBUS2 Operating Range

n

3.3V LDO Output Supply Signal References VLO and

VLO2

n

50kV/μs Common Mode Transient Immunity

n

±20kV HBM ESD on USB Interface Pins

n

1414VPEAK Maximum Continuous Working Voltage

n

17.4mm Creepage Distance

n

22mm × 6.25mm Surface Mount BGA

n

Isolated USB Interfaces

n

Host, Hub, or Device Isolation

n

Industrial/Medical Data Acquisition

All registered trademarks and trademarks are the property of their respective owners.

2894 TA01

VLO

LTM2894

5VISO

ON

5V

3.3V

VBUS

VBUS2

D1+

D1–

ON2

VLO2

D2+

USB PORT

120µF

D2–

GND2

GND

15k

15k

HUB

µC

500ns/DIV

D2+

0.5V/DIV

D2–

0.5V/DIV

2894 TA01b

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