LTC5549
4
5549fa
For more information www.linear.com/LTC5549
ac elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
C
= 25°C. V
CC
= 3.3V, EN = High, P
LO
= 0dBm, P
IF
= –5dBm (–5dBm/tone for two-
tone IIP3 tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Upmixer Application with LO Doubler Off (X2 = Low)
Conversion Loss RF Output = 2GHz, LO = 3.89GHz
RF Output = 5.8GHz, LO = 3.91GHz
RF Output = 9GHz, LO = 7.11GHz
RF Output = 12GHz, LO = 10.11GHz
7.7
7.8
9.2
10.7
dB
dB
dB
dB
Conversion Loss vs T
emperature T
C
= –40°C to 105°C, RF Output = 5.8GHz 0.009 dB/°C
Input 3rd Order Intercept (Δf
IF
= 2MHz) RF Output = 2GHz, LO = 3.89GHz
RF Output = 5.8GHz, LO = 3.91GHz
RF Output = 9GHz, LO = 7.11GHz
RF Output = 12GHz, LO = 10.11GHz
25.0
24.4
23.9
19.9
dBm
dBm
dBm
dBm
SSB Noise Figure RF Output = 2GHz, LO = 3.89GHz
RF Output = 5.8GHz, LO = 3.91GHz
RF Output = 8.5GHz, LO = 6.61GHz
RF Output = 10GHz, LO = 8.11GHz
7.8
8.8
10.4
11.1
dB
dB
dB
dB
LO to RF Output Leakage f
LO
= 1GHz to 12GHz <–30 dBm
LO to IF Input Leakage f
LO
= 1GHz to 12GHz <–27 dBm
IF to LO Isolation f
IF
= 500MHz to 6GHz >45 dB
IF to RF Isolation f
IF
= 500MHz to 6GHz >40 dB
Input 1dB Compression RF Output = 5.8GHz, LO = 3.91GHz 15.5 dBm
Upmixer Application with LO Doubler On (X2 = High)
Conversion Loss RF Output = 5.8GHz, LO = 1.955GHz
RF Output = 9GHz, LO = 3.555GHz
RF Output = 12GHz, LO = 5.055GHz
8.1
9.7
11.8
dB
dB
dB
Conversion Loss vs T
emperature T
C
= –40°C to 105°C, RF Output = 5.8GHz 0.009 dB/°C
2-Tone Input 3rd Order Intercept
(Δf
IF
= 2MHz)
RF Output = 5.8GHz, LO = 1.955GHz
RF Output = 9GHz, LO = 3.555GHz
RF Output = 12GHz, LO = 5.055GHz
23.2
23.5
20.0
dBm
dBm
dBm
SSB Noise Figure RF Output = 5.8GHz, LO = 1.955GHz
RF Output = 9GHz, LO = 3.555GHz
RF Output = 10GHz, LO = 4.055GHz
10.9
12.3
12.7
dB
dB
dB
LO to RF Output Leakage f
LO
= 1GHz to 5GHz <–35 dBm
2LO to RF Output Leakage f
LO
= 1GHz to 5GHz <–30 dBm
LO to IF Input Leakage f
LO
= 1GHz to 5GHz <–30 dBm
2LO to IF Input Leakage f
LO
= 1GHz to 5GHz <–31 dBm
Input 1dB Compression RF Output = 5.8GHz, LO = 1.955GHz 15.4 dBm
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC5549 is guaranteed functional over the –40°C to 105°C
case temperature range (θ
JC
= 25°C/W).
Note 3: SSB noise figure measurements performed with a small-signal
noise source, bandpass filter and 2dB matching pad on input, with
bandpass filters on LO, and output.
