LT1715CMSPBF LINER [Linear Technology], LT1715CMSPBF Datasheet - Page 17

• Manufacturer Part Number: LT1715CMSPBF
• Description: 4ns, 150MHz Dual Comparator with Independent Input/Output Supplies
• Manufacturer: LINER [Linear Technology]

APPLICATIONS INFORMATION
The gain and hysteresis stage of the LT1715 is simple, short
and high speed to help prevent parasitic oscillations while
adding minimum dispersion. This internal “self-latch” can
be usefully exploited in many applications because it occurs
early in the signal chain, in a low power, fully differential
stage. It is therefore highly immune to disturbances from
other parts of the circuit, such as the output, or on the
supply lines. Once a high speed signal trips the hysteresis,
the output will respond, after some propagation delay,
without regard to these external influences that can cause
trouble in nonhysteretic comparators.
±V
The input trip points test circuit uses a 1kHz triangle wave
to repeatedly trip the comparator being tested. The LT1715
output is used to trigger switched capacitor sampling of
the triangle wave, with a sampler for each direction.
Because the triangle wave is attenuated 1000:1 and fed to
the LT1715’s differential input, the sampled voltages are
therefore 1000 times the input trip voltages. The hysteresis
and offset are computed from the trip points as shown.
TRIP
Test Circuit
LT1715
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