LTC6754 Datasheet, PDF (1/22 Pages) Linear Technology – High Speed Rail-to-Rail Input Comparator with LVDS Compatible Outputs

Features
nn _{Low Propagation Delay: 1.8ns Typ.}
nn _{Low Overdrive Dispersion: 1ns Typ.}
(10mV to 125mV Overdrive)
nn _{High Toggle Rate: 890Mbps Typ.}
nn _{LVDS Compatible Output Stage}
nn _{Rail-to-Rail Inputs Extend Beyond Both Rails}
nn _{Low Quiescent Current: 13.4mA}
nn _{Supply Range: 2.4V to 5.25V}
nn _{Features within the LTC6754 Family:}
nn _{Separate Input and Output Supplies}
nn _{Shutdown Pin for Reduced Power}
nn _{Output Latch and Adjustable Hysteresis}
nn _{SC70 and 3mm × 3mm QFN Packages}
Applications
nn _{Clock and Data Recovery}
nn _{Level Translation}
nn _{High Speed Data Acquisition Systems}
nn _{Window Comparators}
nn _{High Speed Line Receivers}
nn _{Time Domain Reflectometry}
nn _{Time of Flight Measurements}
nn _{Cable Drivers}
Typical Application
High Speed Differential Line Receiver and LVDS Translator
with Excellent Common Mode Rejection
SMALL DIFFERENTIAL SIGNAL WITH
LARGE COMMON MODE COMPONENT
V_CCI
+IN ₊
V_CCO
Q
LTC6754
–IN _–
Q
V_EE
100Ω
6754 T01a
LTC6754
High Speed Rail-to-Rail
Input Comparator with
LVDS Compatible Outputs
Description
The LTC^®6754 is a high speed rail-to-rail comparator with
LVDS compatible outputs. The LTC6754 exhibits 1.8ns of
propagation delay, only 1ns of dispersion (10mV to 125mV
overdrive) and a toggle rate up to 890Mbps.
The LTC6754 has rail-to-rail inputs, and will operate from
a 2.4V to 5.25V supply. For the QFN package, the LVDS
output is operated with a separate supply, providing isola-
tion between input and output circuitry, and allowing for
logic level translation.
In shutdown mode, power is reduced from 13.4mA to
under 1.1mA, and the comparator can wake up in 120ns.
The LTC6754 includes 4.5mV of hysteresis to minimize
instability. For the QFN package, a separate pin is available
to set the hysteresis from 0mV (off) up to 40mV. The QFN
version also features output latching to provide the ability
to quickly capture the state of the comparator.
The dispersion of only 1ns combined with excellent
propagation delay of 1.8ns makes the device an excel-
lent choice for timing critical applications. Similarly, the
890Mbps toggle rate and low jitter of 1.5ps_RMS (200mV_P–P,
245.76MHz input) make the LTC6754 ideally suited for
high frequency line driver and clock recovery circuits.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Q–Q
100mV/DIV
0mV
Q–Q
+IN
–IN
+IN, –IN
200mV/DIV
700mV
20ns/DIV
6754 F16
6754f
For more information www.linear.com/LTC6754
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