Analog Devices Linear Technology LTC6953 Demo Manual

Ultralow Jitter, 4.5GHz Clock Distributor with 11 Outputs
DESCRIPTION
Demonstration circuit 2610A features the LTC6953, an
Ultralow Jitter, 4.5GHz Clock Distributor with 11 Outputs
and JESD204B Support.
By default, the DC2610A is powered from a single 3.3V
supply. An option is provided to power to the DC2610A
from dual supplies, allowing for the LTC6953's output
supply pins to connect to an LTC Silent Switcher
LTC6953 input supply pin to connect to a low noise LDO.
All differential inputs and seven of the differential outputs
are populated with 0.5" spaced SMA connectors. These
outputs are AC-coupled with 50Ω transmission lines mak-
ing them suitable to drive 50Ω impedance instruments.
The remaining four differential outputs are terminated
with 100Ω.
SINGLE SUPPLY
3.3V INPUT,
BANANA JACKS
J30 & J31
STAT LED, D1
OUT10, CML
AC-COUPLED
OUTPUTS, SMA
OUT9, CML
AC-COUPLED
OUTPUTS, SMA
OUT8, CML
AC-COUPLED
OUTPUTS, SMA
OUT5, CML
AC-COUPLED
OUTPUTS, SMA
and the
®
LTC6953
DEMO CIRCUIT 2610A
Figure 1. DC2610A Connections
DEMO MANUAL DC2610A
and JESD204B Support
The LTC6953's EZSync™ and SYSREF request func-
tions are made available via the LTC6953 SPI interface
or the EZS_SRQ SMA/turret connectors. The DC2609A,
DC2610A, and DC2611A SMA placement was designed
for ease of connection for all multi-part synchronization
and SYSREF request modes.
A calibration path is provided to aid in accurate LTC6953
propagation delay measurements.
A DC2026 USB serial controller board is used for SPI
communication with the LTC6953, controlled by the sup-
plied LTC6952Wizard™ software.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2610A
L, LT, LTC, LTM, Linear Technology, Silent Switcher and the Linear logo are registered
trademarks and LTC6952 Wizard, QuickEval and EZSync are trademarks of Analog Devices, Inc.
All other trademarks are the property of their respective owners.
RIBBON CABLE CONNECTION
TO DC590 OR DC2026
LTC6953
EZS_SRQ INPUT,
SMA & TURRET
IN INPUT,
SMA & TURRET
OUT0, CML
AC-COUPLED
OUTPUTS, SMA
OUT1, CML
AC-COUPLED
OUTPUTS, SMA
VIN33 OPTION,
REFER TO DC2610
RECONFIGURATION
OUT4, CML
AC-COUPLED
OUTPUTS, SMA
dc2610af
1