AD6458 Просмотр технического описания (PDF) - Analog Devices
Номер в каталоге
Компоненты Описание
производитель
AD6458 Datasheet PDF : 12 Pages
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AD6458
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
10 15 20 25 30 35 40 45 50 55
FREF FREQUENCY – MHz
Figure 17. Demodulator Quadrature Error vs. FREF
Frequency, TA = +25 °C, VPOS = 3.0 V
–0.1
–0.3
–0.5
–0.7
–0.9
–1.1
–1.3
–1.5
5
10 15 20 25 30 35 40 45 50 55
PLL FREQUENCY – MHz
Figure 20. PLL Loop Voltage at FLTR Pin (kVCO) vs. Frequency
16
= 2.1d°
14
= 0.3d°
12
10
8
6
4
2
0
1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0
ERROR – Degrees
Figure 18. Demodulator Quadrature Error Histogram
TA = +25°C, VPOS = 3.0 V. FIF = 13 MHz
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
–60
–65
0
0.5
1.0
1.5
2.0
2.5
VGAIN – Volts
Figure 21. System [(Mixer + IF Ceramic Filter + IF Ampli-
fier + Demodulator)] Input 1 dB Compression Point vs.
VGAIN, TA = +25°C, VPOS = 3.0 V, FIF = 13 MHz, FRF = 83 MHz,
VREF = 1.2 V
–90
–95
–100
–105
–110
–115
–120
0.1
1
10
100
1k
10k
CARRIER FREQUENCY – kHz
Figure 19. PLL Phase Noise vs. Frequency, VPOS = 3 V,
CFLTR = 1 nF, RFLTR = 1 kΩ, FREF = 13 MHz
80
70
60
50
40
30
20
10
0
–10
–20
0
0.5
1.0
1.5
2.0
2.5
VGAIN – Volts
Figure 22. System (Mixer + IF Ceramic Filter + IF Amplifier
+ Demodulator) Conversion Gain vs. VGAIN, TA = +25°C,
VPOS = 3.0 V, FIF = 13 MHz, FRF = 83 MHz, VREF = 1.2 V
–8–
REV. 0
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