LTM2887 2 SPI/Digital or I C Module Isolator with Dual Adjustable 5V Regulators FEATURES DESCRIPTION n 6-Channel Logic Isolator: 2500V for 1 Minute The LTM 2887 is a complete galvanic digital Module RMS n UL-CSA Recognized File E151738 (micromodule) isolator. No external components are n Isolated DC Power: required. A single 3.3V or 5V supply powers both sides n 1.8V to 5V Logic Supply at Up to 100mA of the interface through an integrated, isolated DC/DC n 0.6V to 5V Auxiliary Supply at Up to 100mA converter. A logic supply pin allows easy interfacing with n No External Components Required different logic levels from 1.62V to 5.5V, independent of 2 n SPI/Digital (LTM2887-S) or I C (LTM2887-I) Options the main supply. n High Common Mode Transient Immunity: 30kV/s 2 Available options are compliant with SPI and I C (master n High Speed Operation: mode only) specifications. n 10MHz Digital Isolation n The isolated side includes two 5V nominal power supplies, 4MHz/8MHz SPI Isolation 2 n including programmable current limit, each capable of 400kHz I C Isolation n providing more than 100mA of load current. The supplies 3.3V (LTM2887-3) or 5V (LTM2887-5) Operation n may be adjusted from their nominal value using a single 1.62V to 5.5V Logic Supply n external resistor. 10kV ESD HBM Across the Isolation Barrier n Maximum Continuous Working Voltage: 560V PEAK Coupled inductors and an isolation power transformer n Low Current Shutdown Mode (<10A) provide 2500V of isolation between the input and out- RMS n Low Profile 15mm 11.25mm 3.42mm BGA Package put logic interface. This device is ideal for systems where the ground loop is broken, allowing for a large common APPLICATIONS mode voltage range. Communication is uninterrupted for 2 n Isolated SPI or I C Interfaces common mode transients greater than 30kV/s. n Industrial Systems L, LT, LTC, LTM, Linear Technology, the Linear logo and Module are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. n Test and Measurement Equipment n Breaking Ground Loops TYPICAL APPLICATION Isolated 4MHz SPI Interface LTM2887 Operating Through 50kV/s CM Transients LTM2887-5S SCK V CC2 5V AT 100mA SD0 V CC AV 5V CC2 SCK2 = SD02 5V/DIV 1.15k IV V CC2 L V L2 ON 3.3V AT 100mA AV L2 IV 27.4k REPETITIVE L2 COMMON MODE 1.15k TRANSIENTS SDOE GND2 TO GND CS CS2 6.04k CS CS SDI SDI2 SDI SDI SCK SCK2 SCK SCK 200V/DIV 2887 TA01b DO2 I2 20ns/DIV SDO SDO2 SDO SDO DO1 I1 GND GND2 2887 TA01a 2887fb 1 For more information www.linear.com/LTM2887 ISOLATION BARRIERLTM2887 ABSOLUTE MAXIMUM RATINGS (Note 1) V to GND .................................................. 0.3V to 6V Logic Outputs CC V to GND .................................................... 0.3V to 6V DO1, DO2, SDO to GND ..............0.3V to (V + 0.3V) L L V , AV , IV to GND2......................... 0.3V to 6V O1, SCK2, SDI2, CS2, CC2 CC2 CC2 V , AV , IV to GND2 .............................. 0.3V to 6V SCL2 to GND2 ..........................0.3V to (V + 0.3V) L2 L2 L2 L2 Logic Inputs Operating Temperature Range (Note 4) DI1, SCK, SDI, CS, SCL, SDA, SDOE, LTM2887C ............................................... 0C to 70C ON to GND ..................................0.3V to (V + 0.3V) LTM2887I ............................................40C to 85C L I1, I2, SDA2, LTM2887H ......................................... 40C to 125C SDO2 to GND2 ..........................0.3V to (V + 0.3V) Maximum Internal Operating Temperature ............ 125C L2 Storage Temperature Range .................. 55C to 125C Peak Body Reflow Temperature ............................ 245C PIN CONFIGURATION LTM2887-I LTM2887-S TOP VIEW TOP VIEW 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 DO2 DNC SCL SDA DI1 GND ON V SDO DO2 SCK SDI CS SDOE ON V L L A A B B DO1 GND V DO1 GND V CC CC C C D D E E F F G G H H J J I1 GND2 AV IV AV I1 GND2 AV IV AV L2 L2 CC2 L2 L2 CC2 K K L L I2 DNC SCL2 SDA2 O1 V IV V SDO2 I2 SCK2 SDI2 CS2 V IV V L2 CC2 CC2 L2 CC2 CC2 BGA PACKAGE BGA PACKAGE 32-PIN (15mm 11.25mm 3.42mm) 32-PIN (15mm 11.25mm 3.42mm) T = 125C, = 23.9C/W, = 8.1C/W, T = 125C, = 23.9C/W, = 8.1C/W, JMAX JA JCbottom JMAX JA JCbottom = 18.1C/W, = 9.3C/W = 18.1C/W, = 9.3C/W JCtop JB JCtop JB VALUES DETERMINED PER JESD51-9, WEIGHT = 1.2g VALUES DETERMINED PER JESD51-9, WEIGHT = 1.2g 2887fb 2 For more information www.linear.com/LTM2887