LT5572 Просмотр технического описания (PDF) - Linear Technology
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LT5572 Datasheet PDF : 16 Pages
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LT5572
TYPICAL PERFOR A CE CHARACTERISTICS VCC = 5V, EN = High, TA = 25°C, fLO = 2.14GHz,
PLO = 0dBm. BBPI, BBMI, BBPQ, BBMQ inputs 0.5VDC, baseband input frequency fBB = 2MHz, I and Q 90° shifted, without image or
LO feedthrough nulling. fRF = fBB + fLO (upper sideband selection). PRF(OUT) = –10dBm (–10dBm/tone for 2-tone measurements),
unless otherwise noted. (Note 3)
RF CW Output Power, HD2 and
HD3 vs CW Baseband Voltage and
Temperature
–10
10
RF
–20
0
HD3
–30
–10
–40
HD2
–20
RF CW Output Power, HD2 and
HD3 vs CW Baseband and Supply
Voltage
–10
10
RF
–20
0
HD3
–30
–10
–40
HD2
–20
LO Feedthrough to RF Output
vs CW Baseband Voltage
–30
–35
–40
–50
–60
–70
–80
0
25°C –30
85°C
–40°C –40
HD2 = MAX POWER AT
fLO + 2 • fBB OR fLO – 2 • fBB
HD3 = MAX POWER AT
–50
fLO + 3 • fBB OR fLO – 3 • fBB
–60
1
2
3
4
5
I AND Q BASEBAND VOLTAGE (VP-P,DIFF)
5572 G19
Image Rejection vs CW Baseband
Voltage
–35
–40
–45
–50
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
–55
0
1
2
3
4
5
I AND Q BASEBAND VOLTAGE (VP-P,DIFF)
5572 G22
–50
–60
–70
–80
0
5V –30
5.5V
4.5V –40
HD2 = MAX POWER AT
fLO + 2 • fBB OR fLO – 2 • fBB
HD3 = MAX POWER AT
–50
fLO + 3 • fBB OR fLO – 3 • fBB
–60
1
2
3
4
5
I AND Q BASEBAND VOLTAGE (VP-P,DIFF)
5572 G20
RF 2-Tone Power (Each Tone),
IM2 and IM3 vs Baseband Voltage
and Temperature
10
25°C
RF
0
85°C
–40°C
–10
–20 IM2 = POWER AT
fLO + 4.1MHz
–30 IM3 = MAX POWER
AT fLO + 1.9MHz
–40 OR fLO + 2.2MHz
IM3
IM2
–50
–60
–70
0.1
fBBI = 2MHz, 2.1MHz, 0°
fBBQ = 2MHz, 2.1MHz, 90°
1
10
I AND Q BASEBAND VOLTAGE (VP-P,DIFF, EACH TONE)
5572 G23
–45
–50
–55
0
5V, –40°C
5V, 25°C
5V, 85°C
4.5V, 25°C
5.5V, 25°C
1
2
3
4
5
I AND Q BASEBAND VOLTAGE (VP-P,DIFF)
5572 G21
RF 2-Tone Power (Each Tone),
IM2 and IM3 vs Baseband and
Supply Voltage
10
5V
RF
0
5.5V
4.5V
–10
–20 IM2 = POWER AT
fLO + 4.1MHz
–30 IM3 = MAX POWER
AT fLO + 1.9MHz
–40 OR fLO + 2.2MHz
IM3
IM2
–50
–60
–70
0.1
fBBI = 2MHz, 2.1MHz, 0°
fBBQ = 2MHz, 2.1MHz, 90°
1
10
I AND Q BASEBAND VOLTAGE (VP-P,DIFF, EACH TONE)
5572 G24
Voltage Gain Distribution
35
–40°C
30
25°C
85°C
fLO = 2GHz
25
20
15
10
5
0
–3.2
–2.8 –2.4 –2.0 –1.6
VOLTAGE GAIN (dB)
–1.2
5572 G25
Noise Floor Distribution
40
–40°C
35 25°C
85°C
30 fLO = 2GHz
fNOISE = 2.02GHz
25
20
15
10
5
0
–159.4
–159 –158.6 –158.2 –157.8
NOISE FLOOR (dBm/Hz)
5572 G26
5572f
6
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