The ISO721, ISO721M, ISO722, and ISO722M are digital isolators with a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier

ISO722M

Manufacturer Part NumberISO722M
DescriptionThe ISO721, ISO721M, ISO722, and ISO722M are digital isolators with a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier
ManufacturerTexas Instruments
ISO722M datasheet
 


Specifications of ISO722M

Number Of Channels1Channel Configuration1/0
Insulation Rating(vrms)2500Supply Voltage(s)(v)3.3, 5
Datarate(mbps)150Input Noise FilterNone
Prop Delay(max)(ns)16Ttl/cmos Input ThresholdCMOS
FootprintADuM1100Operating Temperature Range(c)-40 to 125
Pin/package8SOICThermal ShutdownNo
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ISO721, ISO721M
ISO722, ISO722M
SLLS629J – JANUARY 2006 – REVISED JULY 2010
www.ti.com
ISOLATION GLOSSARY
Creepage Distance — The shortest path between two conductive input to output leads measured along the
surface of the insulation. The shortest distance path is found around the end of the package body.
Clearance — The shortest distance between two conductive input to output leads measured through air (line of
sight).
Input-to Output Barrier Capacitance — The total capacitance between all input terminals connected together,
and all output terminals connected together.
Input-to Output Barrier Resistance — The total resistance between all input terminals connected together, and
all output terminals connected together.
Primary Circuit — An internal circuit directly connected to an external supply main or other equivalent source
which supplies the primary circuit electric power.
Secondary Circuit — A circuit with no direct connection to primary power, which derives its power from a
separate isolated source.
Comparative Tracking Index (CTI) — CTI is an index used for electrical insulating materials that is defined as
the numerical value of the voltage which causes failure by tracking during standard testing. Tracking is the
process that produces a partially conducting path of localized deterioration on or through the surface of an
insulating material as a result of the action of electric discharges on or close to an insulation surface -- the higher
the CTI value of the insulating material, the smaller the minimum creepage distance.
Generally, insulation breakdown occurs either through the material, over its surface, or both. Surface failure may
arise from flashover or from the progressive degradation of the insulation surface by small localized sparks. Such
sparks are the result of the breaking of a surface film of conducting contaminant on the insulation. The resulting
break in the leakage current produces an overvoltage at the site of the discontinuity, and an electric spark is
generated. These sparks often cause carbonization on insulation material and lead to a carbon track between
points of different potential. This process is known as tracking.
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