LT5568 데이터 시트보기 (PDF) - Linear Technology
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LT5568 Datasheet PDF : 16 Pages
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LT5568
TYPICAL PERFOR A CE CHARACTERISTICS VCC = 5V, EN = High, TA = 25°C, fLO = 850MHz,
PLO = 0dBm. BBPI, BBMI, BBPQ, BBMQ inputs 0.54VDC, Baseband Input Frequency fBB = 2MHz, I&Q 90° shifted. fRF = fBB + fLO (upper
sideband selection). PRF, OUT = –10dBm (–10dBm/tone for 2-tone measurements), unless otherwise noted. (Note 3)
Noise Floor vs RF Frequency
–160
fLO = 850MHz
(FIXED)
–161
Image Rejection vs LO Frequency
–30
5V, –40°C
5V, 25°C
5V, 85°C
–35
4.5V, 25°C
5.5V, 25°C
LO and RF Port Return Loss
vs RF Frequency
0
LO PORT, EN = LOW
LO PORT, EN = HIGH,
–10
PLO = 0dBm
–162
–163
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
–164
550 650 750 850 950 1050 1150 1250
RF FREQUENCY (MHz)
5568 G10
–40
–45
–50
550 650 750 850 950 1050 1150 1250
LO FREQUENCY (MHz)
5568 G11
–20
RF PORT,
EN = LOW
–30
LO PORT,
EN = HIGH,
PLO = –10dBm
RF PORT, EN = HIGH, No LO
–40
550
RF PORT, EN = HIGH, PLO = 0dBm
650 750 850 950 1050 1150 1250
RF FREQUENCY (MHz)
5568 G12
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
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
Voltage Gain vs LO Power
–4
–6
–8
0.1
2
–10
0
550 650 750 850 950 1050 1150 1250
LO FREQUENCY (MHz)
5568 G13
1
0
550 650 750 850 950 1050 1150 1250
LO FREQUENCY (MHz)
5568 G14
–12
–14
–16
–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)
5568 G15
Output IP3 vs LO Power
25
RF CW Output Power, HD2 and HD3 vs
CW Baseband Voltage and Temperature
–10
10
23
21
19
17
15
fBB, 1 = 2MHz
fBB, 2 = 2.1MHz
13
–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)
5568 G16
–20 –40°C
RF
25°C
–30
85°C
–40
HD3
–50
–60
–70
0
–40°C
25°C
–10
85°C
–20
25°C
–30
HD2
–40°C
–40
85°C
–50
–80
–60
0
1
2
3
4
5
I AND Q BASEBAND VOLTAGE (VP–P, DIFF)
HD2 = MAX POWER AT fLO + 2 • fBB OR fLO – 2 • fBB
HD3 = MAX POWER AT fLO + 3 • fBB OR fLO – 3 • fBB
5568 G17
5568f
5
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