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solutions: ref-designs: Update the EVAL-LTPA-KIT Page (#422)
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docs/solutions/reference-designs/eval-ltpa-kit/hardware_guide/index.rst

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EVAL-LTPA-KIT Hardware User Guide
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=================================
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The :adi:`EVAL-LTPA-KIT` or LTpowerAnalyzer Kit is a low-cost, high performance,
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The :adi:`EVAL-LTPA-KIT` or LTpowerAnalyzer Kit is a low-cost, high performance,
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compact laboratory tool for evaluating and characterizing power supply designs
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– allowing measurements of frequency response, transient response, and output
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impedance. Combined with the capabilities of the ADALM2000 Learning Module,
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it offers high portability with its compact size.
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The LTpowerAnalyzer Software offers a user-friendly interface with
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The LTpowerAnalyzer Software offers a user-friendly interface with
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documentations for ease of usage. It comes with four different current probes
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for 1A, 10A, 50A, and 100A. Immediately kick-off using the kit with the
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LT8642S-based demo board as the device under test (DUT).
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- **Base Board**:
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- LTpowerAnalyzer Base Board
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- LTpowerAnalyzer Base Board
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- **Current Probes**:
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placing a series injection resistor.
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The included DUT, **LT8642S Demo Board**, features a 16-pin male header for
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easy interfacing with the LTpowerAnalyzer’s interposer board. The demo board may
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be connected to the interface board of the LTpowerAnalyzer via a ribbon cable.
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easy interfacing with the LTpowerAnalyzer’s interposer board. The demo board may
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be connected to the interface board of the LTpowerAnalyzer via a ribbon cable.
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.. grid::
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:widths: 75% 25%
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.. figure:: sample_ribbon_cable_connection.png
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Sample ribbon cable connection
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from the Demo Board to the LTpowerAnalyzer
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from the Demo Board to the LTpowerAnalyzer
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(via the Interface A Board)
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However, other DUTs do not have a native support for these interfaces. Below
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**3. Preparing the system for measurements**
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- Connect the LTpowerAnalyzer (LB3031A) main board to the ADALM2000 (M2k) or the
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- Connect the LTpowerAnalyzer (LB3031A) main board to the ADALM2000 (M2k) or the
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Analog Discovery 2 USB scope.
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- Connect the wires to the terminal block on the LTpowerAnalyzer main board and
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- Connect the wires to the terminal block on the LTpowerAnalyzer main board and
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connect the demo board Vin inputs to a power supply.
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- Connect the USB scope to the computer via the USB cable and launch the
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LTpowerAnalyzer software.
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- Connect a current probe to the LTpowerAnalyzer main board.
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LTpowerAnalyzer software.
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- Connect a current probe to the LTpowerAnalyzer main board.
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.. figure:: bode_system_example.jpg
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Basic LTpowerAnalyzer System Setup for Bode Plots Only
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Basic LTpowerAnalyzer System Setup for Bode Plots Only
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(No current probe attached yet)
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Transients and Impedance Measurements
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.. tip::
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The LTpowerAnalyzer Kit comes with an easy-to-use graphical user interface,
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The LTpowerAnalyzer Kit comes with an easy-to-use graphical user interface,
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designed to be used in conjunction with the hardware components. To access
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the installer and learn how to use the built-in tools, visit the
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:ref:`EVAL-LTPA-KIT Software User Guide <ltpa-software>` page.

docs/solutions/reference-designs/eval-ltpa-kit/index.rst

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.. _eval-ltpa-kit:
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EVAL-LTPA-KIT (LTpowerAnalyzer Kit)
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===================================
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EVAL-LTPA-KIT (LTpowerAnalyzer Kit)
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====================================
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Low-cost, High Performance, Compact Laboratory Tool for Evaluating and Characterizing Power Supply Designs.
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Low-cost, High Performance, Compact Laboratory Tool for Evaluating and Characterizing Power Supply Designs
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.. figure:: kitangle.gif
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:align: center
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:width: 600 px
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EVAL-LTPA-KIT (LTpowerAnalyzer Kit)
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EVAL-LTPA-KIT (LTpowerAnalyzer Kit)
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Overview
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--------
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The :adi:`EVAL-LTPA-KIT or LTpowerAnalyzer Kit <EVAL-LTPA-KIT>` is a low-cost,
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The :adi:`EVAL-LTPA-KIT or LTpowerAnalyzer Kit <EVAL-LTPA-KIT>` is a low-cost,
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high performance, compact laboratory tool for evaluating and characterizing
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power supply designs — allowing measurements of frequency response,
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transient response, and output impedance. Combined with the capabilities
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of the ADALM2000 Active Learning Module, it offers high portability
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with its compact size.
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The LTpowerAnalyzer Software offers a user-friendly interface with
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The LTpowerAnalyzer Software offers a user-friendly interface with
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documentations for ease of usage. It comes with four different current probes
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for 1A, 10A, 50A, and 100A. Immediately kick-off using the kit with the
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LT8642S-based demo board as the device under test (DUT).
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+--------------------+--------------------+---------+---------+-----------+
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| **Parameter** | **Conditions** | **Min** | **Max** | **Units** |
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+--------------------+--------------------+---------+---------+-----------+
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| **LTpowerAnalyzer | | | | |
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| **LTpowerAnalyzer | | | | |
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| Main Board | | | | |
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| (LB3031A)** | | | | |
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+--------------------+--------------------+---------+---------+-----------+
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Power Analyzer Board Connections
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The LTpowerAnalyzer Main Board (LB3031A) extends the electrical capabilities
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The LTpowerAnalyzer Main Board (LB3031A) extends the electrical capabilities
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of the ADALM2000 Active Learning Module (M2K) by providing an analog signal
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chain interface that can accommodate ±100 VDC of differential input voltage at
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its ports. This enables a broader range of power supply DUTs that can be
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*Main Board Pinout*
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+------------------+----------------------------------------------------------+
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| **GROUND** | Ground pin of the LTpowerAnalyzer Main Board |
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| **GROUND** | Ground pin of the LTpowerAnalyzer Main Board |
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+------------------+----------------------------------------------------------+
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| **VOUT-** | Input negative terminal pin for the DUT output voltage |
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| | sensing |
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.. figure:: power_analyzer_board_pinout.png
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LTpowerAnalyzer Board (LB3031A) Pinout
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LTpowerAnalyzer Board (LB3031A) Pinout
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Current Probe Connection
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~~~~~~~~~~~~~~~~~~~~~~~~~
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1 MHz range, depending on the absolute value of R3 and R4. The best practice is
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to reduce the absolute value or R3 compared to R1, and R4 compared to R2 by a
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factor of 10 to 100, pushing the pole out to beyond the frequencies of interest.
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The input impedance of the LTpowerAnalyzer is about 1 pF in parallel with 1 MΩ,
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The input impedance of the LTpowerAnalyzer is about 1 pF in parallel with 1 MΩ,
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which should minimize this problem.
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Follow below configuration to set up the system using Module Connection:
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measured differentially from the respective Rs connection to the ISP current
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sense line.
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The common-mode range of the LTPowerAnalyzer is ±100V, and Rs is typically 20Ω
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The common-mode range of the LTPowerAnalyzer is ±100V, and Rs is typically 20Ω
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to 40Ω.
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.. figure:: ledriver2.jpg
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----------------
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Please refer to the following pages for detailed instructions on
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how to set up the LTpowerAnalyzer system for evaluation.
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how to set up the LTpowerAnalyzer system for evaluation.
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.. toctree::
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:titlesonly:

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