LT1116
1
1116fc
For more information www.linear.com/LT1116
Typical applicaTion
FeaTures DescripTion
12ns, Single Supply
Ground-Sensing Comparator
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
posi tive supply down to the negative supply rail. Like
the LT1016, this comparator is specifically designed to
inter face directly to TTL logic with complementary
outputs. The comparator may operate from either a single
5V supply or dual ±5V supplies. Tight offset voltage
specifi cations 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.
applicaTions
n
Ultra Fast (12ns Typ)
n
Operates off Single 5V Supply or ±5V
n
Input Common Mode Extends to Negative Supply
n
No Minimum Input Slew Rate Requirement
n
Complementary TTL Output
n
Inputs Can Exceed the Positive Supply Up to 15V
without Damaging the Comparator
n
Low Offset Voltage
n
Pin-Compatible with LT1016
n
Output Latch Capability
Available in 8-Lead PDIP and SO Packages
n
High Speed A/D Converters
n
Zero Crossing Detectors
n
Current Sense for Switching Regulators
n
Extended Range V to F Converters
n
Fast Pulse Height/Width Discriminators
n
High Speed Triggers
n
Line Receivers
n
High Speed Sampling Circuits
Fast Current Comparator for
Current Mode Switching Regulator
Comparator Response Time
LT1116
M1
C1
DRIVER
CONTROL INPUT
R
BLANKING
LOGIC
Q
Q
R1
5V
+
–
TIME (ns)
VOLTAGE V
OUT
1V/DIV
IN
100mV STEP
5mV OVERDRIVE
20 20
0 0
12ns
12ns
THRESHOLD
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