Printed Circuit Board Layout Additional Resources; Q Formatting Standard Description - Analog Devices ADRV9005 Reference Manual

Reference Manual
ADDITIONAL RESOURCES
Along with this user guide, there are several other resources to aid with evaluation and development with ADRV9001:
Product pages for access to documentation, SDK, design resources and ordering information: ADRV9002, ADRV9003, ADRV9004,
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ADRV9005, ADRV9006
Technical articles:
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The Complete Guide to Troubleshoot and Fine Tune Digital Predistortion
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How a High Dynamic Range RF Transceiver Solves the Blocking Challenge for Mission Critical Communications
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Transceiver with Scalable Power and Performance: A Solution to Mission Critical Communications
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The Next-Gen, Software-Defined Radio (SDR) Transceiver Delivers Big Advances in Frequency Hopping (FH)
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EngineerZone forums:
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TES GUI & Software Support
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Design Support
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FAQs and tutorials
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Q FORMATTING STANDARD DESCRIPTION

The following sections describe the two types of Q Formatting that is mentioned in this document.
Ua.b Format(Unsigned Fixed-Point Format)
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Sa.b Format(Signed Fixed-Point Format)
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Ua.b Format (Unsigned Fixed-Point Format)
Description: In the Ua.b format, "U" stands for unsigned, meaning all numbers are nonnegative. The "a" represents the number of integer bits,
and "b" represents the number of fractional bits.
Range: The range of values that can be represented in Ua.b format is from 0 to 2
Example: For U2.3 format:
Binary Representation: 10.011
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Binary to Decimal Conversion:
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1
Integer Part: 1 × 2 + 0 × 2
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−1
Decimal Part: 0 × 2 + 1 × 2
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Total: 2 + 0.375 = 2.375
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Decimal to Binary Conversion:
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Multiply the decimal number by 2
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That equals to 2.375 × 2
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19 in Binary format is 10011
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Sa.b Format (Signed Fixed-Point Format)
Description: In Sa.b format, "S" indicates the format is signed, allowing for both positive and negative numbers. The "a" includes the sign bit
along with the integer bits, and "b" is the number of fractional bits.
Range: The range of values in Sa.b format is from −2
Example: For S2.2 format:
Binary Representation: 10.11 (Most Significant Bit is a signed bit)
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Binary to Decimal Conversion:
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+1
Integer Part: −1 × +2 + 0 × +2
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−1
Decimal Part: +1 × +2
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Total: −2 + +0.75 = −1.25
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Decimal to binary Conversion:
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analog.com
0
= 2
−2 −3
+ 1 × 2 = 0.375
b b
(2.375 × 2 )
3
= 19
a−1
to +2
0
= −2
−2
+ +1 × +2 = +0.75
a −b
− 2 .
a−1 −b
− +2 .
ADRV9001
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