LTC6945IUFD-PBF データシートの表示（PDF） - Linear Technology
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LTC6945IUFD-PBF Datasheet PDF : 28 Pages
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LTC6945
TYPICAL PERFORMANCE CHARACTERISTICS
Charge Pump Sink Current Error
vs Voltage, Output Current
5
4
3
2
1
0
–1
–2
–3
250μA
–4
1mA
11.2mA
–5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OUTPUT VOLTAGE (V)
6945 G04
Charge Pump Source Current
Error vs Voltage, Temperature
5
4
3
2
1
0
–1
–2
–3
ICP = 11.2mA
–40°C
–4
25°C
105°C
–5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OUTPUT VOLTAGE (V)
6945 G07
RF Output HD3 vs Output Divide
(Single-Ended On RF–)
–5
O=6
–10
O=3
O=2
–15
O=1
–20
–25
fRF = fVCO/O
PVCO = 0dBm
LC = 180nH
CS = 270pF
–30
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
fVCO (GHz)
6945 G10
Charge Pump Sink Current Error
vs Voltage, Temperature
5
4
3
2
1
0
–1
–2
–3
ICP = 11.2mA
105°C
–4
25°C
–40°C
–5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OUTPUT VOLTAGE (V)
6945 G05
RF Output Power vs Frequency
(Single-Ended On RF–)
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
PVCO = 0dBm
LC = 180nH
–2.5 CS = 270pF
105°C
–3.0
25°C
–40°C
–3.5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
FREQUENCY (GHz)
6945 G08
MUTE Output Power
(vSsifnVgClOe-aEnnddeOdutOpnutRDFi–v)ide
–30
–40
O=1
–50
–60 fRF = fVCO/O
–70
PVCO = 0dBm
LC = 180nH
–80 CS = 270pF O = 3
–90
–100
O=2
O=5
–110
O=4
O=6
–120
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
fVCO (GHz)
6945 G11
6
Charge Pump Source Current
Error vs Voltage, Output Current
5
4
3
2
1
0
–1
–2
–3
250μA
–4
1mA
11.2mA
–5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OUTPUT VOLTAGE (V)
6945 G06
RF Output HD2 vs Output Divide
(Single-Ended On RF–)
–20
fRF = fVCO/O
–25
PVCO = 0dBm
LC = 180nH
CS = 270pF
–30
O=3
O=2
O=5
–35
O=1
–40
O=6
–45
O=4
–50
–55
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
fVCO (GHz)
6945 G09
Frequency Step Transient
2.10
2.05
2.00
1.95
1.90
fPFD = 1MHz
BW = 40kHz
100MHz STEP
1.85
0 5 10 15 20 25 30 35 40 45
TIME (μs)
6945 G12
6945f
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