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AD9213 Datasheet(PDF) 45 Page - Analog Devices |
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AD9213 Datasheet(HTML) 45 Page - Analog Devices |
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45 / 110 page  Data Sheet AD9213 Rev. A | Page 45 of 110 Table 11. DDC Decimation Filter (Half-Band Filter) Characteristics Filter Name1 Decimation Ratio Pass Band (rad/sec) Stop Band (rad/sec) Pass-Band Ripple (dB) Stop-Band Attenuation (dB) HB1 2 0.8 × π/2 1.2 × π/2 <±0.001 >100 HB2 2 0.4 × π/2 1.6 × π/2 <±0.001 >100 HB3 2 0.2 × π/2 1.8 × π/2 <±0.001 >100 HB4 2 0.1 × π/2 1.9 × π/2 <±0.001 >100 HB5 2 0.05 × π/2 1.95 × π/2 <±0.001 >100 HB6 2 0.025 × π/2 1.975 × π/2 <±0.001 >100 HB7 2 0.0125 × π/2 1.9875 × π/2 <±0.001 >100 TB2 3 0.8 × π/3 1.6 × π/3 <±0.001 >100 1 All filters are FIR, low pass filters. Table 12. DDC Filter Configurations, ADC Sample Rate = fS DDC Filter Configuration Real (I) Output Complex (I/Q) Outputs Alias Protected Bandwidth Ideal SNR Improvement (dB)1 Decimation Ratio Sample Rate Decimation Ratio Sample Rate HB1 1 fS 2 fS/2 (I) + fS/2 (Q) fS/2 × 80% 1 HB2 + HB1 2 fS/2 4 fS/4 (I) + fS/4 (Q) fS/4 × 80% 4 TB2 + HB1 3 fS/3 6 fS/6 (I) + fS/6 (Q) fS/6 × 80% 5.7 HB3 + HB2 + HB1 4 fS/4 8 fS/8 (I) + fS/8 (Q) fS/8 × 80% 7 TB2 + HB2 + HB1 6 fS/6 12 fS/12 (I) + fS/12 (Q) fS/12 × 80% 8.8 HB4 + HB3 + HB2 + HB1 8 fS/8 16 fS/16 (I) + fS/16 (Q) fS/16 × 80% 10 TB2 + HB3 + HB2 + HB1 12 fS/12 24 fS/24 (I) + fS/24 (Q) fS/24 × 80% 11.8 HB5 + HB4 + HB3 + HB2 + HB1 16 fS/16 32 fS/32 (I) + fS/32 (Q) fS/32 × 80% 13 TB2 + HB4 + HB3 + HB2 + HB1 24 fS/24 48 fS/48 (I) + fS/48 (Q) fS/48 × 80% 14.8 HB6 + HB5 + HB4 + HB3 + HB2 + HB1 32 fS/32 64 fS/64 (I) + fS/64 (Q) fS/64 × 80% 16 TB2 + HB5 + HB4 + HB3 + HB2 + HB1 48 fS/48 96 fS/96 (I) + fS/96 (Q) fS/96 × 80% 17.8 HB7 + HB6 + HB5 + HB4 + HB3 + HB2 + HB1 64 fS/64 128 fS/128 (I) + fS/128 (Q) fS/128 × 80% 19 1 Ideal SNR improvement due to oversampling + filtering > 10log(bandwidth/fS/2). Table 13. DDC Filter Configurations (fS = 10 GSPS) DDC Filter Configuration Real (I) Output Complex (I/Q) Outputs Alias Protected Bandwidth (GHz) Decimation Ratio Sample Rate (GSPS) Decimation Ratio Sample Rate (GSPS) HB1 1 10 2 5 (I) + 5 (Q) 4 HB2 + HB1 2 5 4 2.5 (I) + 2.5 (Q) 2 TB2 + HB1 3 3.3333 6 1.6667 (I) + 1.6667 (Q) 1.3333 HB3 + HB2 + HB1 4 2.5 8 1.25 (I) + 1.25 (Q) 1 TB2 + HB2 + HB1 6 1.6667 12 0.8333 (I) + 0.8333 (Q) 0.6667 HB4 + HB3 + HB2 + HB1 8 1.25 16 0.625 (I) + 0.625 (Q) 0.5 TB2 + HB3 + HB2 + HB1 12 0.8333 24 0.4167 (I) + 0.4167 (Q) 0.3333 HB5 + HB4 + HB3 + HB2 + HB1 16 0.625 32 0.3125 (I) + 0.3125 (Q) 0.25 TB2 + HB4 + HB3 + HB2 + HB1 24 0.4167 48 0.2083 (I) + 0.2083 (Q) 0.1667 HB6 + HB5 + HB4 + HB3 + HB2 + HB1 32 0.3125 64 0.1563 (I) + 0.1563 (Q) 0.125 TB2 + HB5 + HB4 + HB3 + HB2 + HB1 48 0.2083 96 0.1042 (I) + 0.1042 (Q) 0.0833 HB7 + HB6 + HB5 + HB4 + HB3 + HB2 + HB1 64 0.1563 128 0.0781 (I) + 0.0781 (Q) 0.0625 |
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