LT1116_06 Datasheet, PDF (1/8 Pages) Linear Technology – 12ns, Single Supply Ground-Sensing Comparator

LT1116
12ns, Single Supply
Ground-Sensing Comparator
FEATURES
■ _{Ultra Fast (12ns Typ)}
■ _{Operates off Single 5V Supply or ±5V}
■ _{Input Common Mode Extends to Negative Supply}
■ _{No Minimum Input Slew Rate Requirement}
■ _{Complementary TTL Output}
■ _{Inputs Can Exceed the Positive Supply Up to 15V}
without Damaging the Comparator
■ _{Low Offset Voltage}
■ _{Pin-Compatible with LT1016}
■ _{Output Latch Capability}
■ _{Available in 8-Lead PDIP and SO Packages}
U
APPLICATIO S
■ _{High Speed A/D Converters}
■ _{Zero Crossing Detectors}
■ _{Current Sense for Switching Regulators}
■ _{Extended Range V to F Converters}
■ _{Fast Pulse Height/Width Discriminators}
■ _{High Speed Triggers}
■ _{Line Receivers}
■ _{High Speed Sampling Circuits}
, LTC, LT and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
DESCRIPTIO
The LT^®1116 is an ultra fast (12ns) comparator designed
for sensing signals near the negative supply. The input
common mode range extends from 2.5V below the
positive supply down to the negative supply rail. Like the
LT1016, this comparator is specifically designed to
interface directly to TTL logic with complementary
outputs. The comparator may operate from either a single
5V supply or dual ±5V supplies. Tight offset voltage
specifications and high gain allow the LT1116 to be used
in precision applications.
The LT1116 is designed for improved speed and stability
for a wide range of operating conditions. The output stage
provides active drive in both directions for maximum
speed into TTL logic or passive loads, yet it has minimal
cross-conduction current. Unlike other fast comparators,
the LT1116 remains stable even for slow transitions
through the active region, which eliminates the need to
specify a minimum input slew rate.
The LT1116 has an internal, TTL compatible latch for
retaining data at the outputs. The latch holds data as
long as the latch pin is held high. Device parameters
such as gain, offset, and negative power supply current
are not significantly affected by variations in negative
supply voltage.
TYPICAL APPLICATIO
Fast Current Comparator for
Current Mode Switching Regulator
LOGIC
Q
Q
BLANKING
DRIVER
M1
5V
LT1116
C1
R_SENSE
R1
CONTROL INPUT
LT1116 • TA01
Comparator Response Time
THRESHOLD
12ns
12ns
0
20
0
TIME (ns)
20
LT1116 • TA02
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