lt5557 Linear Technology Corporation, lt5557 Datasheet - Page 5

• Manufacturer Part Number: lt5557
• Description: 400mhz To 3.8ghz 3.3v High Linearity Downconverting Rf Mixer
• Manufacturer: Linear Technology Corporation

450MHz application (with external RF/LO matching) 70MHz IF output, P
Δf = 1MHz), high-side LO at 0dBm, unless otherwise noted.
Midband (No external RF/LO matching) 240MHz IF output, P
unless otherwise noted.
TYPICAL PERFOR A CE CHARACTERISTICS
–100
–80
–90
–10
–20
–30
–40
–50
–60
–70
30
25
20
15
40
35
10
10
26
24
22
20
18
16
14
12
10
0
0
5
8
6
4
2
–18
400
IF Output Power, IM3 and IM5 vs
RF Input Power (2 Input Tones)
Conversion Gain Distribution at
1950MHz
Conversion Gain, IIP3 and NF
vs RF Frequency
2.6
SSB NF
IIP3
G
–15
C
2.7
RF INPUT POWER (dBm/TONE)
IM3
IF
OUT
425
CONVERSION GAIN (dB)
RF FREQUENCY (MHz)
–12
T
RF1 = 1949.5MHz
RF2 = 1950.5MHz
LO = 1710MHz
2.8
A
= 25°C
2.9
450
–9
3.0
–6
IM5
LOW-SIDE LO
HIGH-SIDE LO
IF = 240MHz
475
W
IF = 70MHz
T
3.1
T
A
–3
A
= 25°C
= 25°C
5557 G25
5557 G10
5557 G13
3.2
U
500
0
–15
–25
–35
–45
–55
–65
–75
–85
–95
13
11
15
–5
35
30
25
20
15
10
25
23
21
19
17
15
0
9
7
5
3
1
5
5
–15
–6
IF
vs RF Input Power (Single Tone)
IIP3 Distribution at 1950MHz
450MHz Conversion Gain,
IIP3 and NF vs LO Power
IF
(RF = 1950MHz)
(RF = 1830MHz)
23
OUT
OUT
–12
SSB NF
IIP3
G
–4
, 2 × 2 and 3 × 3 Spurs
C
2RF-2LO
–9
24
LO INPUT POWER (dBm)
RF
RF INPUT POWER (dBm)
3RF-3LO
(RF = 1790MHz)
–6
–2
= –6dBm (–6dBm/tone for 2-tone IIP3 tests, Δf = 1MHz), P
25
IIP3 (dBm)
–3
0
0
RF
26
= –6dBm (–6dBm/tone for 2-tone IIP3 tests,
3
2
LO = 1710MHz
LOW-SIDE LO
HIGH-SIDE LO
IF = 240MHz
IF = 240MHz
IF = 70MHz
27
6
T
A
4
= 25°C
85°C
25°C
–40°C
–40°C
25°C
85°C
9
5557 G11
5557 G26
5557 G14
28
V
12
6
CC
= 3.3V, Test circuit shown in Figure 1.
–60
–35
–40
–45
–50
–55
–60
–40
–45
–50
–55
–65
–70
–75
–80
30
27
24
21
12
18
15
9
6
3
0
400
–9
11.0
2 × 2 and 3 × 3 Spurs
vs LO Power (Single Tone)
SSB Noise Figure Distribution at
1950MHz
LO Leakage vs LO Frequency
450MHz and 900MHz Applications
T
P
APPLICATION
A
LO
450MHz
= 25°C
= 0dBm
11.2
–7
(RF = 1830MHz)
(RF = 1790MHz)
600
LO INPUT POWER (dBm)
SSB NOISE FIGURE (dB)
2RF-2LO
3RF-3LO
LO FREQUENCY (MHz)
11.4
–5
11.6
800
–3
11.8
–1
LO
LO = 1710MHz
LT5557
LOW-SIDE LO
APPLICATION
P
1000
IF = 240MHz
IF = 240MHz
RF
900MHz
= –3dBm,
12.0
T
T
= –6dBm
A
A
1
= 25°C
= 25°C
LO-RF
LO-IF
5557 G15
5557 G27
5557 G12
12.2
1200
5557fa
5
3