AD9547/PCBZ Analog Devices Inc, AD9547/PCBZ Datasheet - Page 101

• Manufacturer Part Number: AD9547/PCBZ
• Description: Clock Generator/Synchronizer Evaluation Board
• Manufacturer: Analog Devices Inc

Specifications of AD9547/PCBZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Network Clock Generator/Synchronizer
• Kit Application Type: Clock & Timing
• Silicon Core Number: AD9547
• Main Purpose: Timing, Clock Generator
• Embedded: No
• Utilized Ic / Part: AD9547
• Primary Attributes: 2 Differential or 4 Single Ended Inputs
• Secondary Attributes: CMOS, LVPECL & LVDS Compatible
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Calculation of the β Register Values
The quantized β coefficient consists of two components, β
β
where β
Calculation of β
calculation of β
Using the example value of −β = 6.98672 × 10
This leads to the following quantized value, which is very close
to the desired value of 6.98672 × 10
Calculation of the γ Register Values
The quantized γ coefficient consists of two components, γ
γ
where γ
Calculation of γ
calculation of γ
1
1
, according to
, according to
−β ≈ β
x = −ceil(log
β
y = round(
β
x = 13, so
y = 75019.3347657728, so
β
−γ ≈ γ
x = −ceil(log
y
y = round( γ × 2
γ
1
1
0
quantized
0
= min[31, max(0, x )]
= min[31, max(0, x)]
= min[131071, max(1, y)]
= min[131071, max(1, y )]
0
0
and β
and γ
quantized
quantized
= 75019 × 2
1
1
β
0
0
are the register values.
are the register values.
1
1
, which is also a two-step process.
, which is also a two-step process.
β
1
is a two-step process that leads to the
is a two-step process that leads to the
2
= γ
2
= 13
= β
(
( γ ))
× 2
β
0
0
))
× 2
× 2
17 + β
17 + γ
−30
−(17 + γ
−(17 + β
1
1
)
)
≈ 6.986688823 × 10
1
1
)
)
β
0
= 75019
−5
:
−5
−5
yields
0
0
and
and
Rev. B | Page 101 of 104
Using the example value of − γ = 7.50373 × 10
This leads to the following quantized value, which is very close
to the desired value of 7.50373 × 10
Calculation of the δ Register Values
The quantized δ coefficient consists of two components, δ
δ
where δ
Calculation of δ
calculation of δ
Using the example value of δ = 0.002015399, the preceding
formulas yield
This leads to the following quantized value, which is very close
to the desired value of 0.002015399:
1
, according to
x = 13, so
y = 80570.6873700352, so
γ
δ ≈ δ
x = −ceil(log
δ
y = round( δ × 2
δ
x = 8, so
y = 16906.392174592, so
δ
quantized
1
0
quantized
= min[31, max(0, x )]
= min[32767, max(1, y )]
0
and δ
quantized
= 80571 × 2
= 16906 × 2
δ
1
γ
1
0
are the register values.
1
= δ
1
, which is also a two-step process.
= 8
= 13
is a two-step process that leads to the
2
( δ ))
0
× 2
15 + δ
−(15 + δ
−30
1
−23
)
≈ 7.503759116 × 10
≈ 0.002015352249
1
)
δ
γ
0
0
= 16906
= 80571
−5
:
−5
−5
yields
AD9547
0
and