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AD6649EBZ 数据表(PDF) 13 Page - Analog Devices

部件名 AD6649EBZ
功能描述  IF Diversity Receiver IF sampling frequencies to 400 MHz
PDF  40 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD6649EBZ 数据表(HTML) 13 Page - Analog Devices

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AD6649
Rev. 0 | Page 13 of 40
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = 1.8 V, DRVDD = 1.8 V, sample rate = 250 MSPS, DCS enabled, 1.75 V p-p differential input, VIN = −1.0 dBFS, 32k sample,
TA = 25°C, fixed-frequency NCO, 95 MHz BW FIR filter, unless otherwise noted. In the FFT plots that follow, the location of the second
and third harmonics is noted when they fall in the pass band of the filter. A −1.0 dBFS input level at the analog inputs corresponds to an
output level of −2.5 dBFS when using the fixed-frequency NCO and 95 MHz FIR filter. When using the tunable-frequency NCO and
100 MHz FIR filter, the output level is −1.3 dBFS. These respective output level reductions are due to FIR filter losses. See the FIR Filters
section for more details.
0
20
40
60
120
10
30
50
80
90 100 110
70
0
–20
–40
–60
–80
–120
–140
FREQUENCY (MHz)
–100
fS = 250MSPS
fIN = 30.1MHz @ –1.0dBFS
SNR = 72dB (74.5dBFS)
SFDR = 92dBc (IN-BAND)
THIRD HARMONIC
SECOND HARMONIC
Figure 5. AD6649 Single-Tone FFT with fIN = 30.1 MHz
0
–20
–40
–60
–80
–120
–140
–100
fS = 250MSPS
fIN = 90.1MHz @ –1.0dBFS
SNR = 71.6dB (74.1dBFS)
SFDR = 87.5dBc (IN-BAND)
THIRD HARMONIC
0
20
40
60
120
10
30
50
80
90 100 110
70
FREQUENCY (MHz)
SECOND HARMONIC
Figure 6. AD6649 Single-Tone FFT with fIN = 90.1 MHz
0
–20
–40
–60
–80
–120
–140
–100
fS = 250MSPS
fIN = 140.1MHz @ –1.0dBFS
SNR = 71.1dB (73.6dBFS)
SFDR = 85dBc (IN-BAND)
THIRD HARMONIC
0
20
40
60
120
10
30
50
80
90 100 110
70
FREQUENCY (MHz)
SECOND HARMONIC
Figure 7. AD6649 Single-Tone FFT with fIN = 140.1 MHz
0
–20
–40
–60
–80
–120
–140
–100
fS = 250MSPS
fIN = 185.1MHz @ –1.0dBFS
SNR = 70.5dB (73.0dBFS)
SFDR = 84.5dBc (IN-BAND)
THIRD HARMONIC
0
20
40
60
120
10
30
50
80
90 100 110
70
FREQUENCY (MHz)
Figure 8. AD6649 Single-Tone FFT with fIN = 185.1 MHz
0
20
40
60
120
10
30
50
80
90 100 110
70
–140
FREQUENCY (MHz)
0
–20
–40
–60
–80
–120
–100
fS = 250MSPS
fIN = 220.1MHz @ –1.0dBFS
SNR = 69.8dB (72.3dBFS)
SFDR = 84dBc (IN-BAND)
THIRD HARMONIC
SECOND HARMONIC
Figure 9. AD6649 Single-Tone FFT with fIN = 220.1 MHz
0
–20
–40
–60
–80
–120
–140
–100
fS = 250MSPS
fIN = 305.1MHz @ –1.0dBFS
SNR = 68.5dB (71.0dBFS)
SFDR = 83.5dBc (IN-BAND)
THIRD HARMONIC
0
20
40
60
120
10
30
50
80
90 100 110
70
FREQUENCY (MHz)
SECOND HARMONIC
Figure 10. AD6649 Single-Tone FFT with fIN = 305.1 MHz



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