TRF3722_15 Datasheet, PDF (24/67 Pages) Texas Instruments – TRF3722 Quadrature Modulator with Integrated PLL and VCO

TRF3722
SLWS245A – MAY 2014 – REVISED JUNE 2014
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Typical Characteristics - PLL/VCO (continued)
Unless specified all plots were created using TRF3722EVM, VCC = 3.3 V, VCC_TK = 5 V, and T_A = 25°C. Measured at
LO_OUTP with 50 Ω bias resistor and 47 pF series capacitor. Modulator section powered down. Reference frequency is set
to 61.44 MHz. Optimized bias settings as per Table 16.
-25
-50
-75
-100
-125
-150
-175
500 1k
450 MHz
900 MHz
1800 MHz
2150 MHz
2700 MHz
3600 MHz
4000 MHz
10k
100k
1M
Offset Frequency (Hz)
10M 40M
D215
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
500 1k
T_A = -40GC
T_A = 25GC
T_A = 85GC
10k
100k
1M
Offset Frequency (Hz)
10M 40M
D095
Figure 82. Open Loop Phase Noise vs Frequency
-40
-50
V_CC = 3.15V, 4.75V
-60
V_CC = 3.30V, 5.00V
-70
V_CC = 3.45V, 5.25V
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
500 1k
10k
100k
1M
Offset Frequency (Hz)
10M 40M
D096
Figure 84. 450 MHz Frac-N (Closed Loop Phase Noise) vs
Supply
-40
-50
V_CC = 3.15V, 4.75V
-60
V_CC = 3.30V, 5.00V
-70
V_CC = 3.45V, 5.25V
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
500 1k
10k
100k
1M
Offset Frequency (Hz)
10M 40M
D098
Figure 86. 1800 MHz Frac-N (Closed Loop Phase Noise) vs
Supply
Figure 83. 450 MHz Frac-N (Closed Loop Phase Noise) vs
Temperature
-40
-50
T_A = -40GC
-60
T_A = 25GC
-70
T_A = 85GC
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
500 1k
10k
100k
1M
Offset Frequency (Hz)
10M 40M
D097
Figure 85. 1800 MHz Frac-N (Closed Loop Phase Noise) vs
Temperature
-40
-50
T_A = -40GC
-60
T_A = 25GC
-70
T_A = 85GC
-80
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
500 1k
10k
100k
1M
Offset Frequency (Hz)
10M 40M
D099
Figure 87. 2150 MHz Frac-N (Closed Loop Phase Noise) vs
Temperature
24
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