Dual Output Sine Wave to Logic Converter Utilizes Selectable Input Filtering for Lowest Additive Jitter

News Release ⎜ www.linear.com
Dual Output Sine Wave to Logic Converter Utilizes Selectable
Input Filtering for Lowest Additive Jitter
MILPITAS, CA – April 8, 2013 – MILPITAS, CA – Linear Technology Corporation introduces
the LTC6957, a DC to 300MHz dual output buffer/driver/logic translator, ideal for converting
sine waves into low phase noise logic level signals. Prior solutions were unable to perform this
conversion without introducing a significant amount of jitter. The LTC6957 converts any DC to
300MHz reference frequency into dual LVPECL, LVDS or CMOS outputs with exceptionally
low additive jitter of 45fsRMS (LVPECL) over the 12kHz to 20MHz integration bandwidth and
less than 200fsRMS total jitter. The device also features a proprietary, selectable, input stage
bandwidth-limiting feature, which substantially improves the additive phase noise for slow
slewing signals by 4-7dB.
While the LTC6957 can be used to convert any signal type to a logic level signal, it
particularly excels with sine waves. The selectable, band-limited input stage enables optimal
conversion of sine waves with the lowest additive jitter. The device is ideal for systems that
distribute system clock references for board level synchronization. It can also be used as a clock
driver for analog-to-digital converters (ADCs), digital-to-analog converters (DACs) or DDS
(direct digital synthesis) ICs with clock rates up to 300MHz
The LTC6957 is offered in four output logic signal types: the LTC6957-1 provides two
LVPECL outputs, the LTC6957-2 provides two LVDS logic outputs, and the LTC6957-3 and
LTC6957-4 offer two in-phase CMOS or complementary CMOS outputs, respectively, with
output skew as low as 3ps (typ). Each device is available in small RoHS-compliant 12-pin
MSOP or 3mm x 3mm DFN packages and can be ordered in industrial and automotive grades,
supporting operating temperature ranges from -40°C to 85°C and -40°C to 125°C, respectively.
The LTC6957 is in production, priced starting at $3.60 each in 1,000-piece quantities. Samples
and demo boards may be requested by visiting www.linear.com/product/LTC6957 or by
contacting your local Linear Technology sales office.
Dual Output Sine Wave to Logic Converter Utilizes Selectable
Input Filtering for Lowest Additive Jitter
page 2
Photo Caption: Low Phase Noise DC to 300MHz Buffer/Driver
Summary of Features: LTC6957
Low Phase Noise Buffer/Driver
Optimized Conversion of Sine Wave Signals to Logic Levels
Three Logic Output Types Available:
o LVPECL (LTC6957-1)
o LVDS (LTC6957-2)
o In-Phase & Complementary CMOS (LTC6957-3, LTC6957-4)
Total Additive Jitter: <150fsRMS
Frequency Range: DC to 300MHz
3.3V Supply Operation
Low Output Skew: 3ps Typical
Available in 12-Pin MSOP & 3mm x 3mm DFN Packages
About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing
and marketing a broad line of high performance analog integrated circuits for major companies
worldwide for three decades. The Company’s products provide an essential bridge between our
analog world and the digital electronics in communications, networking, industrial, automotive,
computer, medical, instrumentation, consumer, and military and aerospace systems. Linear
Technology produces power management, data conversion, signal conditioning, RF and interface
ICs, µModule®subsystems, and wireless sensor network products. For more information, visit
, LT, LTC, LTM, Linear Technology, the Linear logo and µModule and are registered trademarks of Linear
Technology Corp. All other trademarks are the property of their respective owners.
Press Contacts:
North America / Worldwide
UK & Nordic
John Hamburger, Director Marketing
[email protected]
Tel: 408-432-1900 ext 2419
Alan Timmins
[email protected]
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
[email protected]
Tel: 408-432-1900 ext 2233