LT5558 查看數據表（PDF） - Linear Technology
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LT5558 Datasheet PDF : 16 Pages
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LT5558
TYPICAL PERFORMANCE CHARACTERISTICS VCC = 5V, EN = High, TA = 25°C, fLO = 900MHz,
fRF = 902MHz, PLO = 0dBm. BBPI, BBMI, BBPQ, BBMQ CM input voltage = 2.1VDC, baseband input frequency = 2MHz, I and Q 90°
shifted, without image or LO feedthrough nulling. fRF = fBB + fLO (upper side-band selection). PRF(OUT) = –10dBm (–10dBm/tone for
2-tone measurements), unless otherwise noted. (Note 3)
Noise Floor vs RF Frequency
–157
fLO = 900MHz (FIXED)
NO BASEBAND SIGNAL
–158
–159
–160
5V, –40°C
5V, 25°C
–161
5V, 85°C
4.5V, 25°C
5.5V, 25°C
–162
550 650 750 850 950 1050 1150 1250
RF FREQUENCY (MHz)
5558 G24
Image Rejection vs LO Frequency
–30
5V, –40°C
5V, 25°C
–35
5V, 85°C
4.5V, 25°C
5.5V, 25°C
–40
–45
–50
–55
550 650 750 850 950 1050 1150 1250
LO FREQUENCY (MHz)
5558 G10
LO and RF Port Return Loss
vs RF Frequency
0
LO PORT, EN = LOW
–10
LO PORT, EN = HIGH, PLO = 0dBm
–20
RF PORT, EN = LOW
RF PORT, EN = HIGH,
PLO = 0dBm
–30
LO PORT, EN = HIGH,
PLO = –10dBm
RF PORT, EN = HIGH, NO LO
–40
550 650 750 850 950 1050 1150 1250
FREQUENCY (MHz)
5558 G25
Absolute I/Q Gain Imbalance vs
LO Frequency
0.2
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
0.1
0
550 650 750 850 950 1050 1150 1250
LO FREQUENCY (MHz)
5558 G11
Absolute I/Q Phase Imbalance vs
LO Frequency
4
5V, –40°C
5V, 25°C
5V, 85°C
3
4.5V, 25°C
5.5V, 25°C
2
1
0
550 650 750 850 950 1050 1150 1250
LO FREQUENCY (MHz)
5558 G12
Voltage Gain vs LO Power
–2
–4
–6
–8
–10
–12
–14
–16
–18
–20
–20 –16 –12 –8 –4
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
048
LO INPUT POWER (dBm)
5558 G13
Output IP3 vs LO Power
24
22
20
18
5V, –40°C
5V, 25°C
16
5V, 85°C
4.5V, 25°C
14
5.5V, 25°C
12
fBB, 1 = 2MHz
fBB, 2 = 2.1MHz
10
–20 –16 –12 –8 –4 0 4
LO INPUT POWER (dBm)
8
5558 G14
LO Feedthrough vs LO Power
–40
–42
–44
–46
–48
–50
–20 –16 –12 –8 –4
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
048
LO INPUT POWER (dBm)
5558 G15
Image Rejection vs LO Power
–35
–40
–45
–50
–55
–20
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
–16 –12 –8 –4 0 4
LO INPUT POWER (dBm)
8
5558 G16
5558fa
5
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