Datasheet ADuM6420A, ADuM6421A, ADuM6422A (Analog Devices)

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Quad-Channel Isolators with Integrated DC-to-DC Converter Data Sheet ADuM6420A /ADuM6421A /ADuM6422A FEATURES FUNCTIONAL BLOCK DIAGRAM iso Power integrated, isolated dc-to-dc converter 100 mA output supply VDD1 1 28 VDD2 Meets CISPR 32/EN550 32 Class B emission limits up to GND1 2 27 GND2 5 Mbps at a full load on a 2-layer PCB GND1 3 26 GND2 Quad dc to 100 Mbps signal isolation channels VIA 4 25 V 4-CHANNEL i Coupler CORE OA 28-lead, fine pitch, SOIC with 8.3 mm minimum creepage LOW POWER ON-OFF KEYING VIB 5 24 VOB ADuM6420A/ High temperature operation: 125°C maximum V ADuM6421A/ IC/VOC 6 23 VOC/VIC High common-mode transient immunity: 100 kV/µs ADuM6422A V 7 22 V Safety and regulatory approvals (p ending) ID/VOD OD/VID LOW RADIATED EMISSIONS DC TO DC UL recognition (pending) GND1 8 21 GND2 5000 V rms for 1 minute per UL 1577 PDIS 9 PCS 20 VSEL CSA Component Acceptance Notice 5A (pending) GND1 10 19 GNDISO VDE V 0884-11 certificate of conformity (pending) VDDP 11 OSC RECT REG 18 VISO VIORM = 566 V peak GND1 12 17 GNDISO APPLICATIONS NIC 13 16 NIC GND 14 15 RS-232 transceivers 1 GNDISO Power supply start-up bias and gate drives
001
NIC = NO INTERNAL CONNECTION. LEAVE THIS PIN FLOATING. Isolated sensor interfaces
21365- Figure 1.
Industrial programmable logic controllers (PLCs) GENERAL DESCRIPTION
The ADuM6420A/ADuM6421A/ADuM6422A1 are quad-channel The ADuM6420A/ADuM6421A/ADuM6422A isolators digital isolators with an isoPower®, integrated, isolated dc-to-dc provide four independent isolation channels (see the Pin converter. Based on the Analog Devices, Inc., iCoupler® Configurations and Function Descriptions for additional technology, the dc-to-dc converter provides regulated, isolated information). power that meets CISPR 32/EN 55032 Class B limits at a full load on a 2-layer printed circuit board (PCB) with ferrites. Popular voltage combinations and the associated output current
Table 1. ADuM6420A/ADuM6421A/ADuM6422A Output
levels are listed in Table 1.
Current Levels
The ADuM6420A/ADuM6421A/ADuM6422A eliminate the
ISO Current, IISO (mA)
need for a separate, isolated dc-to-dc converter in 500 mW,
VDDP (V) VISO (V) 85°C 105°C 125°C
isolated designs. The iCoupler chip scale transformer technology 5 5 100 65 30 is used for isolated logic signals and for the magnetic components 5 3.3 100 65 30 of the dc-to-dc converter. The result is a small form factor, total isolation solution. 1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/5 V SECONDARY ISOLATED SUPPLY ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY ELECTRICAL CHARACTERISTICS—3.3 V OPERATION DIGITAL ISOLATOR CHANNELS ONLY ELECTRICAL CHARACTERISTICS—2.5 V OPERATION DIGITAL ISOLATOR CHANNELS ONLY ELECTRICAL CHARACTERISTICS—1.8 V OPERATION DIGITAL ISOLATOR CHANNELS ONLY PACKAGE CHARACTERISTICS REGULATORY APPROVALS INSULATION AND SAFETY RELATED SPECIFICATIONS DIN V VDE V 0884-11 INSULATION CHARACTERISTICS RECOMMENDED OPERATING CONDITIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TRUTH TABLE TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION APPLICATIONS INFORMATION PCB LAYOUT THERMAL ANALYSIS PROPAGATION DELAY RELATED PARAMETERS EMI CONSIDERATIONS POWER CONSUMPTION INSULATION LIFETIME Surface Tracking Insulation Wear Out Calculation and Use of Parameters Example OUTLINE DIMENSIONS ORDERING GUIDE