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ADC31RF80IRMP Datasheet(PDF) 39 Page - Texas Instruments

Part # ADC31RF80IRMP
Description  ADC31RF80 3-GSPS Telecom Receiver and Feedback Device
PDF  142 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

ADC31RF80IRMP Datasheet(HTML) 39 Page - Texas Instruments

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ADC31RF80
www.ti.com
SBAS860 – AUGUST 2017
Product Folder Links: ADC31RF80
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Copyright © 2017, Texas Instruments Incorporated
8.3.4.3 Decimation Filters
The stop-band rejection of the decimation filters is approximately 90 dB with a pass-band bandwidth of
approximately 80%. Table 3 gives an overview of the pass-band bandwidth depending on decimation filter setting
and ADC sampling rate.
Table 3. Decimation Filter Summary and Maximum Available Output Bandwidth
DECIMATION
SETTING
NO. OF DDCS
NOMINAL
PASSBAND
GAIN
BANDWIDTH
ADC SAMPLE RATE = N MSPS
ADC SAMPLE RATE = 3 GSPS
3 dB
(%)
1 dB
(%)
OUTPUT RATE
(MSPS) PER
BAND
OUTPUT
BANDWIDTH
(MHz) PER
BAND
COMPLEX
OUTPUT RATE
(MSPS) PER
BAND
OUTPUT
BANDWIDTH
(MHz) PER
BAND
Divide-by-4
complex
1
–0.4 dB
90.9
86.8
N / 4 complex
0.4 × N / 2
750
600
Divide-by-6
complex
1
–0.65 dB
90.6
86.1
N / 6 complex
0.4 × N / 3
500
400
Divide-by-8
complex
2
–0.27 dB
91.0
86.8
N / 8 complex
0.4 × N / 4
375
300
Divide-by-9
complex
2
–0.45 dB
90.7
86.3
N / 9 complex
0.4 × N / 4.5
333.3
266.6
Divide-by-10
complex
2
–0.58 dB
90.7
86.3
N / 10 complex
0.4 × N / 5
300
240
Divide-by-12
complex
2
–0.55 dB
90.7
86.4
N / 12 complex
0.4 × N / 6
250
200
Divide-by-16
complex
2
–0.42 dB
90.8
86.4
N / 16 complex
0.4 × N / 8
187.5
150
Divide-by-18
complex
2
–0.83 dB
91.2
87.0
N / 18 complex
0.4 × N / 9
166.6
133
Divide-by-20
complex
2
–0.91 dB
91.2
87.0
N / 20 complex
0.4 × N / 10
150
120
Divide-by-24
complex
2
–0.95 db
91.1
86.9
N / 24 complex
0.4 × N / 12
125
100
Divide-by-32
complex
2
–0.78 dB
91.1
86.8
N / 32 complex
0.4 × N / 16
93.75
75



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