LT1719_15 Datasheet, PDF (1/22 Pages) Linear Technology – 4.5ns Single/Dual Supply 3V/5V Comparator with Rail-to-Rail Output

FEATURES
n _{UltraFast: 4.5ns at 20mV Overdrive}
7ns at 5mV Overdrive
n _{Low Power: 4.2mA at 3V}
n _{Separate Input and Output Power Supplies}
(SO-8 Only)
n _{Output Optimized for 3V and 5V Supplies}
n _{TTL/CMOS Compatible Rail-to-Rail Output}
n _{Low Power Shutdown Mode: 0.1μA}
n _{Low Profile (1mm) SOT-23 (ThinSOT™) Package}
APPLICATIONS
n _{High Speed Differential Line Receiver}
n _{Crystal Oscillator Circuits}
n _{Level Translators}
n _{Threshold Detectors/Discriminators}
n _{Zero-Crossing Detectors}
n _{High Speed Sampling Circuits}
n _{Delay Lines}
LT1719
4.5ns Single/Dual Supply
3V/5V Comparator with
Rail-to-Rail Output
DESCRIPTION
The LT^®1719 is an UltraFast™ 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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
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
1719fa
1