LT1719_1 Datasheet, PDF (1/20 Pages) Linear Technology – 4.5ns Single/Dual Supply 3V/5V Comparator with Rail-to-Rail Output

LT1719
4.5ns Single/Dual Supply
3V/5V Comparator with
Rail-to-Rail Output
FEATURES
s _{UltraFast: 4.5ns at 20mV Overdrive}
7ns at 5mV Overdrive
s _{Low Power: 4.2mA at 3V}
s _{SOT-23 Package}
s _{Separate Input and Output Power Supplies}
(SO-8␣ Only)
s _{Output Optimized for 3V and 5V Supplies}
s _{TTL/CMOS Compatible Rail-to-Rail Output}
s _{Low Power Shutdown Mode: 0.1µA}
U
APPLICATIO S
s _{High Speed Differential Line Receiver}
s _{Crystal Oscillator Circuits}
s _{Level Translators}
s _{Threshold Detectors/Discriminators}
s _{Zero-Crossing Detectors}
s _{High Speed Sampling Circuits}
s _{Delay Lines}
TYPICAL APPLICATION
2.7V to 6V Crystal Oscillator with TTL/CMOS Output
2.7V TO 6V
2k
1MHz TO 10MHz
CRYSTAL (AT-CUT)
220Ω
620Ω
GROUND
+
CASE
C1
LT1719
–
2k
0.1µF
1.8k
OUTPUT
1719 TA01
DESCRIPTIO
The LT^®1719 is an UltraFast^TM comparator optimized for low
voltage operation. The input voltage range extends from
100mV below V_EE to 1.2V below V_CC. Internal hysteresis
makes the LT1719 easy to use even with slow moving input
signals. The rail-to-rail outputs directly interface to TTL and
CMOS. Alternatively the symmetric output drive can be
harnessed for analog applications or for easy translation to
other single supply logic levels. A shutdown control allows
for reduced power consumption and extended battery life in
portable applications.
The LT1719 is available in the SO-8 and 6-lead SOT-23
package. The SO-8 package has separate supplies which
allow flexible operation, accomodating separate analog input
ranges and output logic levels.
For a dual/quad comparator with similar performance, see
the LT1720/LT1721.
, LTC and LT are registered trademarks of Linear Technology Corporation.
UltraFast is a trademark of Linear Technology Corporation.
Propagation Delay vs Overdrive
8
7
6
RISING EDGE
(t_PDLH)
5
25°C
VV_S+T=E5PV= 100mV
C_LOAD = 10pF
4
FALLING EDGE
3
(t_PDHL)
2
1
0
0
10
20
30
40
50
OVERDRIVE (mV)
1719 TA02
1