LTC6754

1

6754f

For more information www.linear.com/LTC6754

Typical applicaTion

FeaTures

DescripTion

High Speed Rail-to-Rail

Input Comparator with

LVDS Compatible Outputs

The LTC®6754 is a high speed rail-to-rail comparator with

LVDS compatible outputs. The LTC6754 exhibits 1.8ns of

propagationdelay,only1nsofdispersion(10mVto125mV

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

890Mbpstogglerateandlowjitterof1.5psRMS(200mVP–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.

applicaTions

n

Low Propagation Delay: 1.8ns Typ.

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Low Overdrive Dispersion: 1ns Typ.

(10mV to 125mV Overdrive)

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High Toggle Rate: 890Mbps Typ.

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LVDS Compatible Output Stage

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Rail-to-Rail Inputs Extend Beyond Both Rails

n

Low Quiescent Current: 13.4mA

n

Supply Range: 2.4V to 5.25V

n

Features within the LTC6754 Family:

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Separate Input and Output Supplies

n

Shutdown Pin for Reduced Power

n

Output Latch and Adjustable Hysteresis

n

SC70 and 3mm

×3mm QFN Packages

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Clock and Data Recovery

n

Level Translation

n

High Speed Data Acquisition Systems

n

Window Comparators

n

High Speed Line Receivers

n

Time Domain Reflectometry

n

Time of Flight Measurements

n

Cable Drivers

20ns/DIV

Q – Q

100mV/DIV

0mV

+IN, –IN

200mV/DIV

700mV

6754 F16

–IN

Q – Q

+IN

High Speed Differential Line Receiver and LVDS Translator

with Excellent Common Mode Rejection

VCCI

VCCO

–

+

Q

100

Q

6754 T01a

SMALL DIFFERENTIAL SIGNAL WITH

LARGE COMMON MODE COMPONENT

VEE

+IN

–IN

LTC6754