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AD9547/PCBZ 数据表(PDF) 79 Page - Analog Devices |
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AD9547/PCBZ 数据表(HTML) 79 Page - Analog Devices |
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79 / 104 page  AD9547 Rev. 0 | Page 79 of 104 Table 83. Digital Loop Filter Coefficients—Profile 01 Address Bit Bit Name Description 0x0612 [7:0] Alpha-0 linear Alpha-0 coefficient linear, Bits[7:0]. 0x0613 [7:0] Alpha-0 coefficient linear, Bits[15:8]. 0x0614 [7:6] Alpha-2 exponent Alpha-2 coefficient exponent, Bits[1:0]. [5:0] Alpha-1 exponent Alpha-1 coefficient exponent, Bits[5:0]. 0x0615 [7:1] Beta-0 linear Beta-0 coefficient linear, Bits[6:0]. 0 Alpha-2 exponent Alpha-2 coefficient exponent, Bit 2. 0x0616 [7:0] Beta-0 linear Beta-0 coefficient linear, Bits[14:7]. 0x0617 7 Unused Unused. [6:2] Beta-1 exponent Beta-1 coefficient exponent, Bits[4:0]. [1:0] Beta-0 linear Beta-0 coefficient linear, Bits[16:15]. 0x0618 [7:0] Gamma-0 linear Gamma-0 coefficient linear, Bits[7:0]. 0x0619 [7:0] Gamma-0 coefficient linear, Bits[15:8]. 0x061A [7:6] Unused Unused. [5:1] Gamma-1 exponent Gamma-1 coefficient exponent, Bits[4:0]. 0 Gamma-0 linear Gamma-0 coefficient linear, Bit 16. 0x061B [7:0] Delta-0 linear Delta-0 coefficient linear, Bits[7:0]. 0x061C 7 Delta-1 exponent Delta-1 coefficient exponent, Bit 0. [6:0] Delta-0 linear Delta-0 coefficient linear, Bits[14:8]. 0x061D [7:4] Alpha-3 exponent Alpha-3 coefficient exponent, Bits[3:0]. [3:0] Delta-1 exponent Delta-1 coefficient exponent, Bits[4:1]. 1 The digital loop filter coefficients (α, β, γ, and δ) have the general form: x(2y), where x is the linear component and y is the exponential component of the coefficient. The value of the linear component (x) constitutes a fraction, where 0 ≤ x < 1. The exponential component (y) is an integer. See the Calculating the Digital Filter Coefficients section for details. Register 0x061E to Register 0x0628—Profile 0 Frequency Multiplication Table 84. R Divider—Profile 01 Address Bit Bit Name Description 0x061E [7:0] R R, Bits[7:0]. 0x061F [7:0] R, Bits[15:8]. 0x0620 [7:0] R, Bits[23:16]. 0x0621 [7:6] Unused Unused. [5:0] R R, Bits[29:24]. 1 The value stored in the R divider register yields an actual divide ratio of one more than the programmed value. Table 85. S Divider—Profile 01 Address Bit Bit Name Description 0x0622 [7:0] S S, Bits[7:0]. 0x0623 [7:0] S S, Bits[15:8]. 0x0624 [7:4] Unused Unused. [3:0] S S, Bits[19:16]. 0x0625 [7:0] Unused Unused. 1 The value stored in the S divider register yields an actual divide ratio of one more than the programmed value. Furthermore, the value of S must be at least 7. |
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