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ADC3683 датащи(PDF) 34 Page - Texas Instruments

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номер детали ADC3683
подробное описание детали  ADC3683-SP Space Grade 18-Bit 1 to 65MSPS, Low Noise, Ultra-low Power Dual Channel ADC
PDF  70 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

ADC3683 датащи(HTML) 34 Page - Texas Instruments

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7.3.5.2 Output Scrambler
The device includes an optional output scrambler feature. Scrambling is performed on each serial output lane
independently. When enabled, the serial output bit stream is scrambled where each output bit is XOR-ed with
2 previous bits (k-14 and k-15) as shown in Figure 7-38. For descrambling, note that the output bit mapper is
located after the scrambler.
On the external receiver, the incoming serial data stream can be descrambled by XOR-ing each incoming bit
with 2 previous bits (k-14 and k-15).
Lane 0
Lane 1
Digital
Scrambler
Scrambler
Bit Mapper
Bit Mapper
Figure 7-37. Output scrambling per lane
Scrambling is enabled by disabling digital bypass (register 0x24, D2) and enabling scrambling (register 0x22,
D6).
XOR
Serial bit stream
x[k]
z
-1
y[k-1]
z
-1
y[k-2]
z
-1
...
y[k-15]
z
-1
y[k-14]
z
-1
Serial output bit stream
y[k]
XOR
z
-1
y[k-1]
z
-1
y[k-2]
z
-1
...
z
-1
y[k-14]
z
-1
y[k-15]
Serial bit stream
x[k]
Scrambler
De-Scrambler
Figure 7-38. Output scrambler and descrambler operation
ADC3683-SP
SBASAB5 – MARCH 2024
www.ti.com
34
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Product Folder Links: ADC3683-SP



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