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dc2035af
DEMO MANUAL DC2035A
DESCRIPTION
LTC5551
300MHz to 3.5GHz Ultra-High Dynamic
Range Downconverting Mixer
Demonstration circuit 2035A features
LTC
®
5551
, which
is a 300MHz to 3.5GHz ultra high dynamic range down
converting mixer. Demo circuit 2035A is optimized for RF
input frequency range 1.1GHz to 2.7GHz. IF output port
is optimized for frequency range 116MHz to 250MHz. RF
input can be matched with few external component for a
wide range of frequencies. IF output port can be matched
externally up to 500MHz. A typical application with low
side LO injection provides the best performance for RF
input frequency range 1.1GHz to 2.7GHz.
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.
PERFORMANCE SUMMARY
LTC5551 is optimized for 3.3V operation. A low power
mode is available and is activated by pulling the ISEL pin
high. This reduces the power consumption by 1/3, however
reduces the IIP3 to approximately 29dBm.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2035A
Specifications are at V
CC
= 3.3V, EN = 3.3V, T
C
= 25°C, ISEL = LOW, P
LO
=
0dBm, P
RF
= 0dBm (∆f = 2MHz, 0dBm/tone for two-tone IIP3 tests), unless otherwise noted. Test circuit shown in Schematic Diagram.
PARAMETER
CONDITION
TYP
UNITS
VCC Supply Voltage
2.5 to 3.6
V
VCC Supply Current
EN = High, with LO Signal Applied
EN = High, ISIL = HIGH, with LO Signal Applied
204
142
mA
mA
Shutdown Current
EN = Low
<100
µA
EN Voltage
Low, Chip Disabled
HIGH, Chip Enabled
<0.3
>1.2
V
V
EN Input Current
V
EN
= 0V to 3.3V
–30 to 100
µA
RF Input Frequency Range
LO Signal Applied, with External Match
1.1 to 2.7
GHz
RF Input Return Loss
LO Signal Applied
>10
dB
IF Output Frequency Range
LO Signal Applied, with External Match
116 to 250
MHz
IF Output Return Loss
LO Signal Applied
>10
dB
LO Frequency Range
With External Match
1.0 to 3.5
GHz
LO Input Return Loss
With External Match
>10
dB
LO Input Power
LO = 1000MHz to 3500MHz,with External LO Match
–6 to 6
dBm
LO to RF leakage
LO = 1000MHz to 3500MHz, with External LO Match
≤25
dBm
LO to IF leakage
LO = 1000MHz to 3500MHz,with External LO Match
≤21
dBm
RF to LO Isolation
RF = 1.1GHz to 2.7GHz, with External Match
>55
dB
RF to IF Isolation
RF = 1.1GHz to 2.7GHz, with External Match
>23
dB
1.1GHz to 2.7GHz Downmixer Application: IF = 153MHz, ISEL = Low, Unless Otherwise Noted.
Power Conversion Gain
RF = 1100MHz, Low Side LO
RF = 1500MHz, Low Side LO
RF = 1950MHz, Low Side LO
RF = 2700MHz, Low Side LO
2.5
2.5
2.4
1.7
dB
dB
dB
dB
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