AD9547SLASHPCBZ datasheet(101/104 Pages) AD

101 / 104 page

AD9547

Rev. 0 | Page 101 of 104

Calculation of the β Register Values

Using the example value of −γ = 7.50373 × 10−5 yields

The quantized β coefficient consists of two components, β0 and

β1, according to

= 13, so γ1 = 13

= 80570.6873700352, so γ0 = 80571

−β ≈ βquantized = β0 × 2−(17 + β1)

This leads to the following quantized value, which is very close

to the desired value of 7.50373 × 10−5:

where β0 and β1 are the register values.

Calculation of β1 is a two-step process that leads to the

calculation of β0, which is also a two-step process.

γquantized

= 80571 × 2−30 ≈ 7.503759116 × 10−5

Calculation of the δ Register Values

x = −ceil(log2( β ))

The quantized δ coefficient consists of two components, δ0 and

δ1, according to

β1 = min[31, max(0, x)]

δ ≈ δquantized

= δ0 × 2−(15 + δ1)

y = round( β × 217 + β1)

where δ0 and δ1 are the register values.

β0 = min[131071, max(1, y)]

Calculation of δ1 is a two-step process that leads to the

calculation of δ0, which is also a two-step process.

Using the example value of −β = 6.98672 × 10−5 yields

x = 13, so β1 = 13

= −ceil(log2(δ))

y = 75019.3347657728, so β0 = 75019

δ1

= min[31, max(0, x)]

This leads to the following quantized value, which is very close

to the desired value of 6.98672 × 10−5:

= round(δ × 215 + δ1)

δ0

= min[32767, max(1, y)]

βquantized = 75019 × 2−30 ≈ 6.986688823 × 10−5

Using the example value of δ = 0.002015399, the preceding

formulas yield

Calculation of the γ Register Values

The quantized γ coefficient consists of two components, γ0 and

γ1, according to

= 8, so δ1 = 8

= 16906.392174592, so δ0 = 16906

−γ ≈ γquantized = γ0 × 2−(17 + γ1)

This leads to the following quantized value, which is very close

to the desired value of 0.002015399:

where γ0 and γ1 are the register values.

Calculation of γ1 is a two-step process that leads to the

calculation of γ0, which is also a two-step process.

δquantized

= 16906 × 2−23 ≈ 0.002015352249

x = −ceil(log2( γ ))

= min[31, max(0, x)]

= round( γ × 217 + γ1)

γ0 =

min[131071, max(1, y)]

AD9547/PCBZ 数据表(PDF) 101 Page - Analog Devices

AD9547/PCBZ 数据表(HTML) 101 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载

链接网址

AD9547/PCBZ 数据表(PDF) 101 Page - Analog Devices

AD9547/PCBZ 数据表(HTML) 101 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表 下载

链接网址

数据表下载