LT5525 Datasheet, PDF (4/12 Pages) Linear Technology – High Linearity, Low Power Downconverting Mixer

LT5525
TYPICAL AC PERFOR A CE CHARACTERISTICS ^VCC ^{= 5V, EN = 3V, T}A ^{= 25°C, f}RF ^{= 1900MHz,}
P_RF = –15dBm (–15dBm/tone for 2-tone IIP3 tests, ∆f = 1MHz), f_LO = f_RF – 140MHz, P_LO = –5dBm, IF output measured at 140MHz,
unless otherwise noted. Test circuit shown in Figure 1.
Conversion Gain and IIP3
vs RF Frequency (Low Side LO)
25
20
IIP3
15
10
5
0 ^GAIN
25°C
85°C
–40°C
–5
900 1100 1300 1500 1700 1900 2100 2300 2500
RF FREQUENCY (MHz)
5525 G01
Conversion Gain and IIP3
vs RF Frequency (High Side LO)
25
20
IIP3
15
10
5
0 ^GAIN
25°C
85°C
–40°C
–5
900 1100 1300 1500 1700 1900 2100 2300 2500
RF FREQUENCY (MHz)
5525 G02
SSB NF vs RF Frequency
20
19
18
17
16
HIGH SIDE LO
15
14
LOW SIDE LO
13
12
11
12
900 1100 1300 1500 1700 1900 2100 2300 2500
RF FREQUENCY (MHz)
5525 G03
Conversion Gain and IIP3
vs LO Input Power
25
20
15
IIP3
10
5
0 ^GAIN
25°C
85°C
–40°C
–5
–16 –14 –12 –10 –8 –6 –4 –2 0 2 4
LO INPUT POWER (dBm)
5525 G04
SSB Noise Figure
vs LO Input Power
20
25°C
19
85°C
–40°C
18
17
16
15
14
13
12
–14 –12 –10 –8 –6 –4 –2
LO INPUT POWER (dBm)
02
5525 G05
LO-IF, LO-RF and RF-LO Leakage
vs Frequency
0
–10
–20
–30
–40
–50 ^LO-RF
–60
RF-LO
–70
LO-IF
–80
–90
–100
500
1000 1500 2000 2500 3000
FREQUENCY (MHz)
5525 G06
Conversion Gain and IIP3
vs Supply Voltage
25
20
15
10
IIP3
5
0 ^GAIN
25°C
85°C
–40°C
–5
2.8 3.2
3.6 4 4.4 4.8
SUPPLY VOLTAGE (V)
5.2 5.6
5525 G07
RF, LO and IF Port Return Loss
vs Frequency
0
–5
RF
–10
LO
–15
–20
IF
–25
–30
0
500 1000 1500 2000 2500 3000
FREQUENCY (MHz)
5525 G08
IF Output Power and IM3 vs RF
Input Power (Two Input Tones)
0
–10
–20
–30 ^POUT
–40
–50
–60
–70
–80 ^IM3
–90
–100
–20
25°C
85°C
–40°C
–15
–10
–5
0
RF INPUT POWER (dBm/TONE)
5525 G09
5525f
4