Datasheet LTM2884 (Analog Devices)

LTM2884 Isolated USB Transceiver with Isolated Power
FEATURES DESCRIPTION
n
LTM2884: 2500VRMS for 1 Minute
The LTM®2884 is a complete galvanically isolated USB n
LTM2884(a): 3000VRMS for 1 Minute
2.0 compatible μModule® (micromodule) transceiver. n
LTM2884: UL Recognized File #E151738
An upstream supply powers both sides of the interface n
LTM2884(a): CSA Recognized File #255632
through an integrated, isolated DC/DC converter. n
USB 2.0 Full Speed and Low Speed Compatible
The LTM2884 is ideal for isolation in host, hub, bus split- n
Integrated Isolated DC/DC Converter, External or
ter or peripheral device applications. It is compatible with
Bus Powered
USB 2.0 full speed (12Mbps) and low speed (1.5Mbps) n
Auto-Configuration of Bus Speed
operation. Automatic speed selection configures inte- n 2.5W (500mA at 5V) Output Power from External grated pull-up resistors on the upstream port to match Input Supply (VCC = 8.6V to 16.5V) those sensed on the downstream device. n 1W (200mA at 5V) Output Power from USB Bus Supply (V The isolator µModule technology uses coupled induc- BUS) n 3.3V LDO Output Supply Signal References V tors and an isolated power transformer to provide isola- LO, VLO2 n High Common Mode Transient Immunity: 30kV/μs tion between the upstream and downstream USB inter- n ESD: ±15kV HBM on USB Interface Pins face. This device is ideal for systems requiring isolated n 15mm × 15mm × 5mm Surface Mount BGA Package ground returns or large common mode voltage variations. Uninterrupted communication is guaranteed for common mode transients greater than 30kV/μs.
APPLICATIONS
Enhanced ESD protection allows this part to withstand n Isolated USB Interfaces up to ±15kV (human body model) on the USB transceiver n Host, Hub, or Device Isolation interface pins to local supplies and ±15kV through the n Industrial/Medical Data Acquisition isolation barrier to supplies without latch-up or damage. All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION Powered 2.5W Isolated Hub Port Bus Powered 1W Isolated Peripheral Device
4.4V TO 16.5V 8.6V TO 16.5V VBUS 200mA AT 5V 500mA AT 5V VBUS VCC LTM2884 VBUS VCC LTM2884 VLO VCC2 VBUS2 VLO VCC2 + ON PWR 100µF ON PWR SPNDPWR SPNDPWR PERIPHERAL VLO2 VLO2 HUB µC TION BARRIER TION BARRIER DOWNSTREAM 1.5k ISOLA D1+ D2+ USB PORT ISOLA D1+ D2+ UPSTREAM D1– D2– USB PORT D1– D2– 15k 15k GND GND2 GND GND2 2884 TA01b GND 2884 TA01a Rev. C Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Switching Characteristics Isolation Characteristics Regulatory Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Functional Table Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts