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dc1959bfa
DEMO MANUAL DC1959B
LOOP FILTER
COMPONENTS
RIBBON CABLE
CONNECTION
TO DC590
3.3V DC SUPPLY,
BANANA JACKS
MUTE
JUMPER
DIFFERENTIAL
OUTPUT, SMA
5V DC SUPPLY,
BANANA JACKS
FREQUENCY
REFERENCE
INPUT, SMA
Description
LTC6948
Ultralow Noise and Spurious Fractional-N
Synthesizer with Integrated VCO
Demonstration circuit 1959B features the LTC6948, an
Ultralow Noise and Spurious Fractional-N Synthesizer
with Integrated VCO.
There are four options of the DC1959B, one for each ver
-
sion of the LTC6948. Table 1 summarizes the available
DC1959B options.
The
DC1959B provides 50Ω SMA connectors for the ref
-
erence frequency input f
REF
(REF+IN) and the differential
RF output (RF+ and RF–).
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
FracNWizard is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
A DC590 USB serial controller board is used for SPI com-
munication with
the LTC6948, controlled by the supplied
FracNWizard™ software.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1959B
Figure 1. DC1959B Connections
