lt5575 Linear Technology Corporation, lt5575 Datasheet - Page 7

• Manufacturer Part Number: lt5575
• Description: 800mhz To 2.7ghz High Linearity Direct Conversion Quadrature Demodulator
• Manufacturer: Linear Technology Corporation

TYPICAL AC PERFORMANCE CHARACTERISTICS
(–10dBm/tone for 2-tone IIP2 and IIP3 tests), f
Test Circuit Shown in Figure 1 (Notes 6, 7).
–0.1
–0.2
–0.3
–10
–15
–20
–25
–30
0.3
0.2
0.1
0.0
–5
70
65
60
55
50
45
40
0
800
–15
800 1100 1400 1700 2000 2300 2600
I/Q Gain Mismatch
vs LO Input Power
RF Port Return Loss
IIP2 vs Supply Voltage
f
BB
900MHz
1100 1400 1700 2000 2300 2600
= 1MHz
LOW BAND;
C10 = 4.7pF
MID BAND;
C10 = 2pF
HIGH BAND;
NO EXTERNAL
COMPONENT
1900MHz
–10
LO INPUT POWER (dBm)
RF FREQUENCY (MHz)
FREQUENCY (MHz)
2500MHz
– 5
0
4.75V
5V
5.25V
5575 G19
5575 G22
5575 G25
5
BB
= 1MHz (0.9MHz and 1.1MHz for 2-tone tests), P
–0.1
–0.2
–0.3
–10
–15
–20
–25
0.3
0.2
0.1
0.0
–1
–2
–3
–5
3
2
1
0
0
800
800
–15
I/Q Phase Mismatch
vs LO Input Power
LO Port Return Loss
I/Q Gain Mismatch
vs Supply Voltage
f
BB
1100 1400 1700 2000 2300 2600
1100 1400 1700 2000 2300 2600
= 1MHz
LOW BAND; C12 = 3.9pF
MID BAND; C12 = 2.2pF
HIGH BAND;
NO EXTERNAL COMPONENT
–10
LO INPUT POWER (dBm)
RF FREQUENCY (MHz)
FREQUENCY (MHz)
– 5
0
900MHz
1900MHz
2500MHz
4.75V
5V
5.25V
5575 G20
5575 G23
5575 G26
5
V
CC
= 5V, EN = High, T
–2
–3
22
10
–1
30
28
26
24
20
18
16
14
12
35
30
25
20
15
10
LO
3
2
1
0
800
5
0
800
–30
Large-Signal DSB NF
vs RF Input Power
Conversion Gain, IIP3, NF
vs Supply Voltage
I/Q Phase Mismatch
vs Supply Voltage
= 0dBm, unless otherwise noted.
2500MHz
NOTE 7
1100 1400 1700 2000 2300 2600
–25
1100 1400 1700 2000 2300 2600
–20
RF INPUT POWER (dBm)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
1900MHz
A
–15
CONV. GAIN
= 25ºC, P
DSB NF
IIP3
–10
LT5575
–5
RF
= –10dBm
0
900MHz
4.75V
5V
5.25V
4.75V
5V
5.25V
5
5575 G24
5575 G27
5575 G21
7
5575f
10