Linear Technology LTC5548 Demo Manual

Description
Demonstration circuit 2461A is optimized for evaluation
of the LTC 5548 passive double-balanced mixer with
®
integrated LO frequency doubler. Its RF port is matched
to 50Ω from 2GHz to 13.6GHz with 9dB return loss, and
the LO port is matched to 50Ω from 1GHz to 12GHz with
10dB return loss. The differential IF port is usable from
DC to 6GHz. The LTC5548 can be used for upconverting
and downconverting applications.
The internal LO doubler can be enabled to allow operation
with a lower frequency LO input signal such as that from
the LTC6945/LTC6946 or
frequency synthesizers.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2461A
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.
boArD lAyout
LTC6947/LTC6948 family of
Figure 1. DC2461A
DEMO MANUAL DC2461A
2GHz to 14GHz Microwave
Mixer with Low IF Frequency
Absolute MAxiMuM input
rAtings
Supply Voltage (EN) ....................................................4V
Enable Input Voltage (EN) ................–0.3V to V
LO Input Power (1GHz to 12GHz) .........................10dBm
LO Input DC Voltage ............................................... ±0.1V
RF Input Power (2GHz to 14GHz) .........................20dBm
RF Input DC Voltage ............................................... ±0.1V
IF Input Power (LF to 6GHz) .................................20dBm
IF Input DC Voltage ................................................ ±0.1V
Operating Temperature Range (T
Junction Temperature (T
Storage Temperature Range .................. –65°C to 150°C
Caution: This part is sensitive to electrostatic discharge
(ESD). Observe proper ESD precautions when handling
the LTC5548.
LTC5548
CC
) ........ –40°C to 105°C
C
) .................................... 150°C
J
+ 0.3V
dc2461af
1