LT1719 Datasheet, PDF (1/16 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 _{Separate Input and Output Power Supplies}
s _{Output Optimized for 3V and 5V Supplies}
s _{Input Voltage Range Extends 100mV}
Below Negative Rail
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
0.01µF
1.8k
OUTPUT
1719 TA01
DESCRIPTIO
The LT^®1719 is an UltraFast^TM comparator optimized for low
voltage operation. Separate supplies allow flexible operation
to accomodate separate analog input ranges and output logic
levels. 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.
The LT1719 is available in the 8-pin SO package; a shutdown
control allows for reduced power consumption and extended
battery life in portable applications.
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
V_STEP = 100mV
V_CC = 5V
C_LOAD = 10pF
4
FALLING EDGE
3
(t_PDHL)
2
1
0
0
10
20
30
40
50
OVERDRIVE (mV)
1719 TA02
1