Datasheet ADuM6420A, ADuM6421A, ADuM6422A (Analog Devices) - 19

Data Sheet ADuM6420A/ ADuM6421A/ ADuM6422A V 1 28 DD1 VDD2 GND 2 27 1 GND2 GND 3 26 1 GND2 V 4 25 IA VOA V 5 24 IB VOB V 6 23 OC VIC V 7 ADuM6422A 22 OD VID TOP VIEW GND 8 21 1 GND (Not to Scale) 2 PDIS 9 20 VSEL GND 10 19 1 GNDISO V 11 18 DDP VISO GND 12 17 1 GNDISO NIC 13 16 NIC GND 14 15 1 GNDISO
5 0 0
NOTES
5-
1. NIC = NOT INTERNALLY CONNECTED. THESE PINS ARE NOT CONNECTED INTERNALLY.
36 21 Figure 5. ADuM6422A Pin Configuration
Table 28. ADuM6422A Pin Function Descriptions Pin No. Mnemonic Description
1 VDD1 Power Supply for the Side 1 Logic Circuits of the Device. VDD1 requires a 0.10 μF bypass capacitor to GND1. VDD1 is independent of VDDP and can operate with power supply voltages between 1.7 V and 5.5 V. 2, 3, 8, 10, 12, 14 GND1 Ground 1. Ground references for the primary isolator. Pin 2, Pin 3, Pin 8, Pin 10, Pin 12, and Pin 14 are internally connected, and it is recommended to connect the GND1 pins to a common ground. 4 VIA Logic Input A. 5 VIB Logic Input B. 6 VOC Logic Output C. 7 VOD Logic Output D. 9 PDIS Power Disable. When PDIS is tied to GND1, the power converter is active. When a logic high voltage is applied to PDIS, the power supply enters a low power standby mode. 11 VDDP DC-to-DC Converter Supply Voltage, 4.5 V to 5.5 V. VDDP requires 0.10 μF and 10 μF bypass capacitors to GND1. 13, 16 NIC Not Internally Connected. These pins are not connected internally. 15, 17, 19 GNDISO Grounds for the Isolated DC-to-DC Converter. Connect the GNDISO pins together through one ferrite bead to PCB ground. The GNDISO pins are internally isolated from GND2. 18 VISO Secondary Supply Voltage Output for External Loads. VISO requires 0.10 μF and 10 μF capacitors to GNDISO. Connect VISO through a ferrite bead to external loads. 20 VSEL Output Voltage Select Input. Connect VSEL to VISO for a 5 V output or to GNDISO for a 3.3 V output. 21, 26, 27 GND2 Ground Reference for VDD2 on Side 2. It is recommended that the GND2 pins be connected together. The GND2 pins are internally isolated from GNDISO. 22 VID Logic Input D. 23 VIC Logic Input C. 24 VOB Logic Output B. 25 VOA Logic Output A. 28 VDD2 Power Supply for the Side 2 Logic Circuits of the Device. VDD2 requires a 100 nF bypass capacitor. VDD2 is independent of VISO and can operate with power supply voltages between 1.7 V and 5.5 V. Rev. 0 | Page 19 of 29 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