LTC5548
4
5548f
For more information www.linear.com/LTC5548
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), IF = 240MHz, Low Side LO
Conversion Loss RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
6.3
7.1
9.3
10.9
dB
dB
dB
dB
Conversion Loss vs T
emperature T
C
= –40°C to 105°C, RF Output = 5.8GHz 0.006 dB/°C
Input 3rd Order Intercept (Δf
IF
= 2MHz) RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
26.3
24.9
21.5
17.2
dBm
dBm
dBm
dBm
SSB Noise Figure RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 8.5GHz
7.8
8.7
10.4
dB
dB
dB
LO to RF Output Leakage f
LO
= 1GHz to 12GHz <–25 dBm
LO to IF Input Leakage f
LO
= 1GHz to 12GHz <–26 dBm
IF to LO Isolation f
IF
= 500MHz to 6GHz >50 dB
IF to RF Isolation f
IF
= 500MHz to 6GHz >40 dB
Input 1dB Compression RF Output = 5.8GHz 15.7 dBm
Upmixer Application with LO Doubler On (X2 = High), IF = 240MHz, Low Side LO
Conversion Loss RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
7.4
9.6
12.1
dB
dB
dB
Conversion Loss vs T
emperature T
C
= –40°C to 105°C, RF Output = 5.8GHz 0.006 dB/°C
2-Tone Input 3rd Order Intercept
(Δf
IF
= 2MHz)
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
24.9
21.3
16.8
dBm
dBm
dBm
SSB Noise Figure RF Output = 5.8GHz
RF Output = 9GHz
10.4
12.4
dB
dB
LO to RF Output Leakage f
LO
= 1GHz to 5GHz <–30 dBm
2LO to RF Output Leakage f
LO
= 1GHz to 5GHz <–25 dBm
LO to IF Input Leakage f
LO
= 1GHz to 5GHz <–36 dBm
2LO to IF Input Leakage f
LO
= 1GHz to 5GHz <–20 dBm
Input 1dB Compression RF Output = 5.8GHz 14.8 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 LTC5548 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.
