µModule Isolators Transformer Isolated Power Diodes Decoupling Caps Isolators Coupled Signal Inductors LDO Application Die Complete Isolation and Power for Standard Serial Interfaces Linear Technology’s µModule® isolators are complete system-in-package (SiP) solutions that provide up to 3.5kVRMS isolation for the most popular serial interfaces, including USB, RS485, RS232, SPI/Digital and I2C. These devices provide up to 2.5W of isolated power to neighboring components. Boasting high integration and performance in small footprints, absolutely no external components are required. Part Number Interface LTM2881 RS485 LTM2882 RS232 LTM2883-S SPI/Digital LTM2892-S SPI/Digital LTM2883-I I2C LTM2892-I I2C LTM2884 Isolation # Dri/ Supply Max Data (VRMS) Rec Voltage (V) Rate USB 2500 2500 2500 3500 2500 3500 1/1 2/2 3/3 3/3 3/3 3/3 5/3.3 5/3.3 5/3.3 1.62 to 5.5 5/3.3 3 to 5.5 20Mbps 1Mbps 10MHz 10MHz 400kHz 400kHz 2500 1/1 4.4 to 16.5 12Mbps Isolated Power Output(s) 5V (1W) 5V (1W) Adj. 3V to 5V, Adj. ±12V (0.6W) – Adj. 3V to 5V, Adj. ±12V (0.6W) – 2.5W from External Supply, 1W from Bus Supply Galvanic Isolation Linear Technology μModule isolators use embedded, inductively coupled coils to pass data differentially across the isolation boundary, resulting in an extremely robust communications scheme. Simple isolated solutions are made available with the integration of isolated data, isolated power and all passive components, including bypass capacitors, in a single package. High distance through-insulation ultimately translates to higher ESD protection and reliability. L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks and the Isolator logo is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Max Temp Package 105°C 15mm × 11mm BGA-32 or LGA-32 85°C 15mm × 11mm BGA-32 or LGA-32 85°C 15mm × 11mm BGA-32 125°C 9mm × 6mm BGA-24 85°C 15mm × 11mm BGA-32 125°C 9mm × 6mm BGA-24 105°C 15mm × 15mm BGA-44 Common Mode Transient Immunity A differential signaling scheme enables communication through common mode transient events greater than 50kV/μs, unaffected by the transient and avoiding any priority data jitter or data corruption. The system includes data refresh, error checking and safe shutdown for robust digital communications. 5V/DIV 5V/DIV 200V/ DIV LTM2892 –3 VERSIONS 20ns/DIV 5.5 –5 VERSIONS 3.3 5.0 VIN (V) 4.5 3.0 With the exception of the LTM2892, all µModule isolators provide at least one isolated power supply for powering neighboring components, such as data converters. These supplies are regulated, up to 65% efficient, fault tolerant and, in some cases, adjustable using a single resistor. VCC2 ≥ 4.75V LTM2881 0.6 Isolated Power 0.8 1.2 1.4 1 OUTPUT POWER (W) 1.6 4.0 1.8 Safety, EMC and EMI µModule isolators are certified to stringent component level safety, electromagnetic compatibility (EMC) and electromagnetic interference (EMI) standards. All µModule isolators pass accepted safety standards, including United States’ UL1577 and Europe’s IEC60747-5-2, which test isolation barrier performance under various environmental conditions and require 100% production screening. EMC refers to a device’s ability to operate properly in the presence of EMI. All µModule isolators pass EMC tests per IEC 61000-4-3/-8/-9, which subject the devices to particular magnetic field frequencies and strengths. EMI refers to a device’s actual radiated emissions. All µModule isolators are well below CISPR 22 Class A and B limits, as well as the Federal Communications Commission (FCC) Class A limit. Standard Description UL1577 Standard for Safety, Optical Isolators IEC 60747-5-2 (VDE 0884-10) Optoelectronic Devices, Essential Ratings and Characteristics IEC 60664-1 Insulation Coordination for Equipment within Low Voltage Systems IEC 60950-1 Information Technology Equipment—Safety IEC 61010-1 Measurement, Control, Laboratory Equipment—Safety IEC 60601-1 Medical Electrical Equipment IEC 61000-4-2 Electrostatic Discharge Immunity IEC 61000-4-3 Radio Frequency Field Immunity IEC 61000-4-4 Electrical Fast Transients IEC 61000-4-5 Surge Immunity IEC 61000-4-8 Power Frequency Magnetic Field Immunity IEC 61000-4-9 Pulse Magnetic Field Immunity CISPR 22 Radiated Emissions - Information Technology Equipment CSA CAN #5A Standard for Safety, Optical Isolators and Other Related Devices 60 CISPR 22 CLASS A LIMIT 50 FCC CLASS A LIMIT 40 AMPLITUDE (dBµV/m) VIN (V) 3.6 2.7 0.4 OUTD REPETITIVE COMMON MODE TRANSIENTS FROM GND1 TO GND2 6.0 3.9 INA CISPR 22 CLASS B LIMIT 30 20 10 PREDICTED DATA COIL EMISSIONS 0 −10 FCC CLASS B LIMIT LTM2881 LOW-EMI DEMO BOARD EMISSIONS RBW = 120kHz VBW = 300kHz DETECTOR = PEAK SWEEP TIME = 17s −20 −30 10 100 FREQUENCY (MHz) 1k www.linear.com/isolator n 1-800-4-LINEAR 0514B