Input Comparator. LTC6754 Datasheet

LTC6754 Datasheet PDF


Part Number

LTC6754

Description

High Speed Rail-to-Rail Input Comparator

Manufacture

Linear

Total Page 22 Pages
Datasheet
Download LTC6754 Datasheet


LTC6754
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
VCCI
+IN +
VCCO
Q
LTC6754
–IN
VEE
Q
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 1.5psRMS (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.
Q–Q
100mV/DIV
0mV
Q–Q
+IN–IN
+IN, –IN
200mV/DIV
700mV
20ns/DIV
6754 F16
For more information www.linear.com/LTC6754
6754f
1

LTC6754
LTC6754
Absolute Maximum Ratings
(Note 1)
Total Input Supply Voltage (VEE to VCCI)...................5.5V
Total Output Supply Voltage (VEE to VCCO)...............5.5V
Input Voltage
–IN, +IN, LE/HYST, SHDN........VEE – 0.3V, VCCI + 0.3V
Input Current
–IN, +IN, LE/HYST, SHDN (Note 2)................... ±10mA
Output Current(Q, Q)............................................ ±20mA
Operating Temperature Range (Note 3)... –40°C to 125°C
Specified Temperature Range (Note 4)
LTC6754I..............................................–40°C to 85°C
LTC6754H........................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
Maximum Junction Temperature (Note 4)............. 150°C
Lead Temperature Soldering
(10 sec) (SC70 Only).......................................... 300°C
pin Configuration
TOP VIEW
Q1
VEE 2
+IN 3
6Q
5 VCCI/VCCO
4 –IN
SC6 PACKAGE
6-LEAD PLASTIC SC70
TJMAX = 150°C, θJA = 256°C/W (NOTE 3)
TOP VIEW
VCCO
VCCI
VEE
1
2
3
12 11 10
13
VEE
456
9 VEE
8 LE/HYST
7 SHDN
UD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC QFN
TJMAX = 150°C, θJA = 68°C/W (NOTE 3)
EXPOSED PAD (PIN 13) IS VEE, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
LTC6754ISC6#TRMPBF LTC6754ISC6#TRPBF LGVH
6-Lead Plastic SC-70
LTC6754HSC6#TRMPBF LTC6754HSC6#TRPBF LGVH
6-Lead Plastic SC-70
LTC6754IUD#PBF
LTC6754IUD#TRPBF
LGVJ
12-Lead Plastic QFN
LTC6754HUD#PBF
LTC6754HUD#TRPBF LGVJ
12-Lead Plastic QFN
TRM = 500 pieces. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
SPECIFIED
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
6754f
2 For more information www.linear.com/LTC6754





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