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ISO7421MDR Datasheet(PDF) 9 Page - Texas Instruments |
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ISO7421MDR Datasheet(HTML) 9 Page - Texas Instruments |
9 / 20 page ISO7420, ISO7420M ISO7421, ISO7421M www.ti.com SLLS984D – JUNE 2009 – REVISED JULY 2010 DEVICE INFORMATION PACKAGE CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT L(I01) Minimum air gap (clearance) Shortest terminal-to-terminal distance through air 4.8 mm Minimum external tracking Shortest terminal-to-terminal distance across the L(I02) 4.3 mm (creepage) package surface Tracking resistance (comparative CTI DIN IEC 60112 / VDE 0303 Part 1 >175 V tracking index) Minimum internal gap (internal Distance through the insulation 0.014 mm clearance) VIO = 500 V, TA < 100°C >1012 Ω Isolation resistance, input to RIO output(1) VIO = 500 V, 100°C ≤ TA ≤ max >1011 Ω Barrier capacitance, input to CIO VIO = 0.4 sin (2pft), f = 1 MHz 1 pF output(1) CI Input capacitance(2) VI = VCC/2 + 0.4 sin (2pft), f = 1 MHz, VCC = 5 V 1 pF (1) All pins on each side of the barrier tied together creating a two-terminal device. (2) Measured from input pin to ground. NOTE Creepage and clearance requirements should be applied according to the specific equipment isolation standards of an application. Care should be taken to maintain the creepage and clearance distance of a board design to ensure that the mounting pads of the isolator on the printed-circuit board do not reduce this distance. Creepage and clearance on a printed-circuit board become equal according to the measurement techniques shown in the Isolation Glossary. Techniques such as inserting grooves and/or ribs on a printed circuit board are used to help increase these specifications. INSULATION CHARACTERISTICS (3) over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS SPECIFICATION UNIT VIORM Maximum working insulation voltage 560 Vpeak VPR Input-to-output test voltage t = 1 s (100% production), partial discharge 5 pC 1050 Vpeak t = 60 s (qualification) VIOTM Transient overvoltage 4000 Vpeak t = 1 s (100% production) t = 60 s (qualification) 2500 VISO Isolation voltage per UL Vrms t = 1 s (100% production) 3000 RS Insulation resistance VIO = 500 V at TS >109 Ω Pollution degree 2 (3) Climatic Classification 40/125/21 Table 2. IEC 60664-1 RATINGS TABLE PARAMETER TEST CONDITIONS SPECIFICATION Basic isolation group Material group III-a Rated mains voltage ≤ 150 Vrms I–IV Installation classification Rated mains voltage ≤ 300 Vrms I–III Rated mains voltage ≤ 400 Vrms I–II Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): ISO7420 ISO7420M ISO7421 ISO7421M |
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