LTC6954 - Low Phase Noise, Triple Output Clock Distribution Divider/Driver

The LTC®6954 is a family of very low phase noise clock distribution parts. Each part has three outputs and each output has an individually programmable frequency divider and delay. There are four members of the family, differing in their output logic signal type:

LTC6954-1: Three LVPECL outputs

LTC6954-2: Two LVPECL and one LVDS/CMOS outputs

LTC6954-3: One LVPECL and two LVDS/CMOS outputs

LTC6954-4: Three LVDS/CMOS outputs

Each output is individually programmable to divide the input frequency by any integer from 1 to 63, and to delay each output by 0 to 63 input clock cycles. The output duty cycle is always 50%, regardless of the divide number. The LVDS/CMOS outputs are jumper selectable via the OUTxSEL pins to provide either an LVDS logic output or a CMOS logic output.

The LTC6954 also features Linear Technology’s EZSync system for perfect clock synchronization and alignment every time.

All device settings are controlled through an SPI-compatible serial port.

Features
  • Low Noise Clock Distribution: Suitable for High Speed/High Resolution ADC Clocking
  • Additive Jitter < 20fsRMS (12kHz to 20MHz)
  • Additive Jitter < 85fsRMS (10Hz to Nyquist)
  • 1.8GHz Maximum Input Frequency (LTC6954-1 When DELAY = 0)
  • 1.4GHz Maximum Input Frequency (LTC6954-1 When DELAY > 0, LTC6954-2, -3, -4)
  • EZSync™ Clock Synchronization Compatible
  • Three Independent, Low Noise Outputs
  • Four Output Combinations Available
  • Three Independent Programmable Dividers Covering All Integers From 1 to 63
  • Three Independent Programmable Delays Covering All Integers From 0 to 63
  • –40°C to 105°C Junction Temperature Range
Typical Application
LTC6954 Typical Application
LTC6954 Typical Application
Applications
  • Clocking High Speed, High Resolution ADCs, DACs and Data Acquisition Systems
  • Low Jitter Clock Distribution
Packaging
LTC6954 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6954IUFF-1#PBF4x7 QFN-36I$11.79$8.25
LTC6954IUFF-1#TRPBF4x7 QFN-36I$8.31
LTC6954IUFF-2#PBF4x7 QFN-36I$10.71$7.50
LTC6954IUFF-2#TRPBF4x7 QFN-36I$7.56
LTC6954IUFF-3#PBF4x7 QFN-36I$10.71$7.50
LTC6954IUFF-3#TRPBF4x7 QFN-36I$7.56
LTC6954IUFF-4#PBF4x7 QFN-36I$10.71$7.50
LTC6954IUFF-4#TRPBF4x7 QFN-36I$7.56
Demo Boards
Part NumberDescriptionPrice
DC1954A-ALTC6954-1 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 3 LVPECL Outputs (Req DC590 or DC2026)$125.00
DC1954A-BLTC6954-2 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 2 LVPECL and 1 LVDS/CMOS outputs (Req DC590 or DC2026)$125.00
DC1954A-CLTC6954-3 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 1 LVPECL and 2 LVDS/CMOS outputs (Req DC590 or DC2026)$125.00
DC1954A-DLTC6954-4 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 3 LVDS/CMOS outputs (Req DC590 or DC2026)$125.00
Companion Boards
Part NumberDescriptionPrice
DC2430ADC2430A Linduino SPI 1:8 Expander Demonstration Board (DC2026 Included)Contact Factory
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
DC590BIsolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards$50.00
Datasheet
Reliability Data
Product Selector Card
Press Release
Software and Simulation
Linduino
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ltc6954_1.ibs: LTC6954-1 IBIS Model
ltc6954_2.ibs: LTC6954-2 IBIS Model
ltc6954_3.ibs: LTC6954-3 IBIS Model
ltc6954_4.ibs: LTC6954-4 IBIS Model
LTC6954 - DC1954A.INO
LTC6954 - Linduino Header File
LTC6954 - Linduino.CPP File