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AD9680

Data Sheet

Rev. C | Page 52 of 97

Table 12. DDC Samples, Chip Decimation Ratio = 2

Real (I) Output (Complex to Real Enabled)

Complex (I/Q) Outputs (Complex to Real Disabled)

HB2 FIR +

HB1 FIR

(DCM1 = 2)

HB3 FIR +

HB2 FIR +

HB1 FIR

(DCM1 = 4)

HB4 FIR +

HB3 FIR +

HB2 FIR +

HB1 FIR

(DCM1 = 8)

HB1 FIR

(DCM1 = 2)

HB2 FIR +

HB1 FIR

(DCM1 = 4)

HB3 FIR +

HB2 FIR +

HB1 FIR

(DCM1 = 8)

HB4 FIR +

HB3 FIR +

HB2 FIR +

HB1 FIR

(DCM1 = 16)

N + 1

N + 2

N + 3

N + 1

N + 3

N + 1

N + 4

N + 2

N + 4

N + 2

N + 5

N + 3

N + 1

N + 5

N + 3

N + 1

N + 6

N + 2

N + 6

N + 2

N + 7

N + 3

N + 1

N + 7

N + 3

N + 1

N + 8

N + 4

N + 2

N + 8

N + 4

N + 2

N + 9

N + 5

N + 3

N + 9

N + 5

N + 3

N + 1

N + 10

N + 4

N + 2

N + 10

N + 4

N + 2

N + 11

N + 5

N + 3

N + 11

N + 5

N + 3

N + 1

N + 12

N + 6

N + 2

N + 12

N + 6

N + 2

N + 13

N + 7

N + 3

N + 13

N + 7

N + 3

N + 1

N + 14

N + 6

N + 2

N + 14

N + 6

N + 2

N + 15

N + 7

N + 3

N + 15

N + 7

N + 3

N + 1

DCM means decimation.

Table 13. DDC Samples, Chip Decimation Ratio = 4

Real (I) Output (Complex to Real Enabled)

Complex (I/Q) Outputs (Complex to Real Disabled)

HB3 FIR + HB2 FIR +

HB1 FIR (DCM1 = 4)

HB4 FIR + HB3 FIR +

HB2 FIR + HB1 FIR

(DCM1 = 8)

HB2 FIR + HB1 FIR

(DCM1 = 4)

HB3 FIR + HB2 FIR +

HB1 FIR (DCM1 = 8)

HB4 FIR + HB3 FIR +

HB2 FIR + HB1 FIR

(DCM1 = 16)

N + 1

N + 2

N + 3

N + 1

N + 3

N + 1

N + 4

N + 2

N + 4

N + 2

N + 5

N + 3

N + 5

N + 3

N + 1

N + 6

N + 2

N + 6

N + 2

N + 7

N + 3

N + 7

N + 3

N + 1

DCM means decimation.

Table 14. DDC Samples, Chip Decimation Ratio = 8

Real (I) Output (Complex to Real Enabled)

Complex (I/Q) Outputs (Complex to Real Disabled)

HB4 FIR + HB3 FIR + HB2 FIR + HB1 FIR (DCM1 = 8)

HB3 FIR + HB2 FIR + HB1 FIR

(DCM1 = 8)

HB4 FIR + HB3 FIR + HB2 FIR +

HB1 FIR (DCM1 = 16)

N + 1

N + 2

N + 3

N + 1

N + 4

N + 2

N + 5

N + 3

N + 6

N + 2

N + 7

N + 3

DCM means decimation.

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