Linear Technology DC2070A Demo Manual

Description

Demonstration circuit DC2070A is optimized for evaluation
of the LTC 5577 high signal level active downconverting
®
mixer. Its RF input port is matched to 50Ω from 1.3GHz to
4.3GHz with 12dB return loss, and the LO port is matched
to 50Ω from 950MHz to 4.1GHz with 10dB return loss.
The RF and LO inputs are easily matched for higher or
lower frequencies with simple external matching, as low
as 350MHz and 300MHz, respectively. The low capacitance
differential IF output is usable up to 1.5GHz. The LTC5577
active mixer is optimized for RF downconverting applica-
tions that require high input signal handling capability and
wide bandwidth.
Design files for this circuit board are available at
http://www.linear.com/demo
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 photo
Absolute MAxiMuM input
rAtings
Supply Voltage (V
Enable Input Voltage (EN) ................–0.3V to V
LO Input Power (350MHz to 4.5GHz) ...................10dBm
LO Input DC Voltage ............................................... ±0.1V
RF Input Power (300MHz to 4GHz) ......................18dBm
RF Input DC Voltage ............................................... ±0.1V
TEMP Monitor Input Current ..................................10mA
Operating Temperature Range (T
Junction Temperature (T
Storage Temperature Range .................. –65°C to 150°C
Figure 1. Test Setup for Mixer 2-Tone Measurements
DEMO MANUAL DC2070A
300MHz to 4GHz
High Signal Level Active
Downconverting Mixer
+
, IF , IF
CC
) .................................... 150°C
J
CAUTION: THIS PART IS SENSITIVE TO ELECTRO-
STATIC DISCHARGE (ESD). OBSERVE PROPER ESD
PRECAUTIONS WHEN HANDLING THE LTC5577.
LTC5577
–
) .....................................4V
+ 0.3V
CC
) ........ –40°C to 105°C
C
dc2070af
1