1. Manuals
  2. Brands
  3. ElevATE Semiconductor Manuals
  4. Motherboard
  5. Whitney
  6. User manual

ElevATE Semiconductor Whitney User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Whitney EVM Guide
Rev A: 10/14/2022
Whitney EVM Guide
Rev A: October 14, 2022
This document contains information on a product under development. The parametric information contains target
parameters that are subject to change.
Copyright © Elevate Semiconductor
Page 1 of 39

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Whitney and is the answer not in the manual?

Questions and answers

Related Manuals for ElevATE Semiconductor Whitney

Summary of Contents for ElevATE Semiconductor Whitney

  • Page 1 Whitney EVM Guide Rev A: 10/14/2022 Whitney EVM Guide Rev A: October 14, 2022 This document contains information on a product under development. The parametric information contains target parameters that are subject to change. Copyright © Elevate Semiconductor Page 1 of 39...

  • Page 2: Table Of Contents

    MODIFYING VRNG AND VCNTR ......................16 DIGITAL RAMP FUNCTION ........................16 WHITNEY DAC NON-LINEARITY AND FORCE VOLTAGE ACCURACY ............17 10 SUGGESTED VCNTR AND VRNG SETTINGS FOR TYPICAL SUPPLY VOLTAGE RANGES ......18 11 OPTIONAL CONTROL: OPEN AND CLOSE EVM RELAYS ................19 12 MEASURE VOLTAGE..........................
  • Page 3 Whitney EVM Guide Rev A: 10/14/2022 17 FORCE CURRENT SLEW RATE CONTROL AND MEASURE CURRENT MONITORING ........30 17.1 Step 1: FI Slew Rate Control and MI Monitoring........................30 17.2 Step 2: FI Slew Rate Control and MI Monitoring........................31 17.3...
  • Page 4 Whitney EVM Guide Rev A: 10/14/2022 Table of Tables TABLE 1: RECOMMENDED DIODE LOCATIONS FOR THE BAS70SW-AU_R1_000A1 ................... 9 TABLE 2: VCNTR AND VRNG ..................................18 TABLE 3: RECOMMENDED COMP AND FF CAPS ............................29 Table of Figures FIGURE 1: EVM AND DIGITAL CONTROLLER BOARD ..........................5 FIGURE 2: INSTALLER DIRECTORY ................................

  • Page 5: Introduction

    Rev A: 10/14/2022 1 Introduction Congratulations on your purchase of an Elevate Semiconductor Whitney evaluation system! You will find that it serves as an invaluable development platform to help get your product to market in the shortest possible time. The Whitney evaluation board and GUI (Graphical User Interface) allow the customer to demonstrate and evaluate Whitney performance and functionality.

  • Page 6: Evm Gui Installation Media

    2 EVM GUI Installation Media The Whitney EVM ships with self-installing software on the included flash drive. To ensure the evaluation board is correctly recognized when connected to the PC, the software should be installed before connecting the board to the Evaluation PC’s USB port.

  • Page 7: Figure 4: Gui Directory

    Whitney EVM Guide Rev A: 10/14/2022 The default installation directory is “C:\Program Files(x86)\Whitney_EVM_GUI_REV_A”. However, the EVM GUI can be installed to any directory on any drive where the user has full rights to read, write, and modify files. Click Next to begin installation.

  • Page 8: Support Files

    “SERxxxxx_CAL.csv” files. If you have been provided with additional SERxxxxx_CAL.csv files, copy the files into this directory. The ”Whitney_EVM_GUI Support Files” directory will also include a more recent revision of the Whitney EVM GUI. Copy this revision (Whitney_EVM_GUI_REV_x.exe) into this directory and delete Whitney_EVM_GUI_REV_A.exe.

  • Page 9: Warnings

    3 Warnings Whitney is a high voltage part with the ability to source significantly over 200mA of current. Special care must be taken when using this product to ensure the safety of the device, board, and user. Please read the following cautions carefully and make sure that the hardware and software comply with the restrictions listed.

  • Page 10: Hardware

    4 Hardware Power Supplies The following power supply settings are a safe condition selected when the Whitney EVM is initially powered up but any rails within the valid operating condition can be powered up to: 1. Common ground return for all supplies (Black Banana jack labeled GND) 2.

  • Page 11: Evm Usb Cable

    FIGURE 8: MICRO-USB CONNECTOR External Hardware Required for GPIB Use In order to run the Whitney EVM with the GPIB enabled, you are required to have connected: • 3 BK Precision 9132B- Triple Output Programable DC Power Supplies (for controlling the supplies) •...

  • Page 12: Gui Overview

    The external supplies should be enabled prior to starting the GUI (the digital controller board is powered from the external +12V supply). Double click on “Whitney_EVM_GUI_REV_[A..Z].exe” to start the GUI. The Whitney EVM GUI initial default display: GPIB is disabled by default and may not be used unless the instruments in section 4.3 are connected.

  • Page 13: Powering Up The Whitney Device

    Power supply currents should be checked from the front of the power supplies. Please make sure current limits are set as to not cause excessive damage to the EVM in the event of a failure before power up. Whitney EVM initial power supply current (typical values): IDD (+1.8V): 38mA...

  • Page 14: Loading Calibration Factors

    “SERxxxxx_CAL.csv”, where “xxxxx” is the serial number of the Whitney device shipped with the EVM. The unique Whitney serial number is read from a device register and is displayed as an integer in the lower right-hand corner of the GUI display called “DUT SER #”.

  • Page 15: Initial Default Channel 0 Force Voltage Settings

    6 Initial Default Channel 0 Force Voltage Settings Connect a voltmeter to Whitney PMU Channel 0 output (SMA connector J17, silkscreen label CHAN0_OUT) and click on the red CHAN0 Disabled button. The button color will change from red to green, and the text will be updated to CHAN0 Enabled. The voltmeter should now read +2.00V.

  • Page 16: Modifying Vrng And Vcntr

    Force Voltage gain and offset). Note that the voltmeter reading is unchanged at +2.000V; when you modified VCNTR, the LabView code automatically updated Whitney registers to maintain the voltage set by FV Level 2. Return Set VCNTR to 0.1 and press <Enter> before proceeding to the next step.

  • Page 17: Whitney Dac Non-Linearity And Force Voltage Accuracy

    The Whitney 16-bit DACs are non-monotonic and require a multi-point calibration to achieve the specified Force Voltage accuracy. The Whitney GUI implements a full multi-point DAC calibration. Note that in Figure 17the scale goes from ± 80mV but in Figure 18, the scale is from ±10mV...

  • Page 18: Suggested Vcntr And Vrng Settings For Typical Supply Voltage Ranges

    Whitney EVM Guide Rev A: 10/14/2022 10 Suggested VCNTR and VRNG Settings for Typical Supply Voltage Ranges The internal DACs have a nominal range of -2.4V to +2.4V; in VRNG5 the nominal Force Voltage (FV) and Measure Voltage (MV) gain is 16.67. Use the lowest possible VRNG setting to minimize output noise and improve FV and MV accuracy and drift over temperature.

  • Page 19: Optional Control: Open And Close Evm Relays

    (selected). The following relays were automatically closed when you clicked on the “Power Up” button: CON_F0_SMU0: Connects the Whitney FORCE_HI_0 output and SENSE_HI_0 input to the center pin of SMA connector J17. CON_F0_SMU1: Connects the Whitney FORCE_HI_1 output and SENSE_HI_1 input to the center pin of SMA connector J32.

  • Page 20: Measure Voltage

    Whitney EVM Guide Rev A: 10/14/2022 12 Measure Voltage Navigate back to the “Register Maps” tab (located in the upper left-hand corner). CH0 is enabled; your voltmeter should read +2.0V. 1. The FV Offset Correction (mV) control can be used to “null out” any residual Force Voltage offset on a per-voltage range basis.

  • Page 21: Calibration

    The latest versions of the EVM GUI include support for calibration of the 16-bit Force Voltage (FV_A and FV_B), VCNTR, CVA, and CVB DACs, which significantly improves accuracy. Whitney EVM calibration under full GPIB control requires an Agilent E34401A Digital Multimeter and a Keithley Model 238 or Model 2461 Source Meter. However, it is possible to calibrate the Whitney without these GPIB instruments.

  • Page 22: Verifying Dac Calibration Accuracy - Uncalibrated Dac

    DAC output voltages and sweep and plot calibrated FV_A, FV_B, FI, VCNTR, VCH, VCL, ICH, and ICL DAC voltages as measured through the MON_A/B_# outputs. A 16-bit ADC located on the Whitney EVM is used to measure the voltages. In the example below, the uncalibrated FV_A DAC is swept from code 32746 to code 32800.

  • Page 23: Verifying Fv_A Dac Calibration Accuracy

    Whitney EVM Guide Rev A: 10/14/2022 13.3 Verifying FV_A DAC Calibration Accuracy The latest versions of the EVM GUI also include a “Sweeps” tab. In the example below the calibrated FV_A DAC is swept from -2.4V to +2.4V in 10mV steps (select VRNG0 to set the graph limits to +-1mV, press <Enter>, and then click on button “FV_A DAC Calibrated Voltage Sweep”...

  • Page 24: Verifying Fv And Mv Calibration Accuracy

    Whitney EVM Guide Rev A: 10/14/2022 13.4 Verifying FV and MV Calibration Accuracy In the example below the calibrated Force Voltage is swept from -7.0V to +7.0V in 10mV steps while the Measure Voltage is measured through the MON_A/B_# outputs (first select VRNG3, set the Start, Stop, and Step levels, then click on button “FV_A/MV Calibrated Voltage Sweep”).

  • Page 25: Verifying Fi And Mi Calibration Accuracy

    Whitney EVM Guide Rev A: 10/14/2022 13.5 Verifying FI and MI Calibration Accuracy In the example below the CH0 calibrated Force Current is swept from -2.000mA to +2.000mA in 20μA steps while the CH1 Measure Current is measured through the MON_A/B_# outputs (CH0 is automatically set to Force Current mode while CH1 is automatically set to Force Voltage mode).

  • Page 26: Connect Mon_A_0 (Ch0 Monitor Output) To Sma Connector J20

    Whitney EVM Guide Rev A: 10/14/2022 14 Connect MON_A_0 (CH0 Monitor Output) to SMA Connector J20 Navigate to the “MUX and Switches” tab under the “GUI Control” tab and click the “Set Switches” button. Connect one high impedance input of an oscilloscope to J20 and another high impedance oscilloscope input to SMA connector J17 (CH0 PMU output) to enable real-time monitoring of the Force Voltage ramp at J17 and Measure Current at J20.

  • Page 27: Force Voltage Slew Rate Control And Measure Current Monitoring

    Whitney EVM Guide Rev A: 10/14/2022 15 Force Voltage Slew Rate Control and Measure Current Monitoring 15.1 Step 1: FV Slew Rate and MI Monitoring Navigate back to the “Register Maps” tab. MON0_SEL should already be set to MI (measure current). Set the Voltage Range to VRNG2, and the MI Range to 20mA.

  • Page 28: Step 2: Fv Slew Rate And Mi Monitoring

    Whitney EVM Guide Rev A: 10/14/2022 15.2 Step 2: FV Slew Rate and MI Monitoring After executing FV RAMP the FV_A_RAMPENA bit of the FV_A_RAMP register will be set. This will “lock-out” the FV_A register; changing the contents of the FV_A register will have no effect. If you wish to bypass the FV ramping feature and write the FV_A register directly to control the Force Voltage level, it will be necessary to first clear the FV_A_RAMPENA bit.

  • Page 29: Automatic Vs. Manual Selection Of Compensation And Ff Caps

    Whitney EVM Guide Rev A: 10/14/2022 16 Automatic vs. Manual Selection of Compensation and FF Caps By default, compensation and feed-forward capacitance values are selected automatically by LabView according to the current range and mode of operation (Force Voltage or Force Current). The default values are selected to enable stable operation with no external capacitive loading.

  • Page 30: Force Current Slew Rate Control And Measure Current Monitoring

    Whitney EVM Guide Rev A: 10/14/2022 17 Force Current Slew Rate Control and Measure Current Monitoring 17.1 Step 1: FI Slew Rate Control and MI Monitoring Disable CH0 by clicking on CHAN0 Enabled and set Mode to Force Current. Set the MI Range to 2mA and then set the MI Range back to 20mA to initialize internal LabView variables.

  • Page 31: Step 2: Fi Slew Rate Control And Mi Monitoring

    Whitney EVM Guide Rev A: 10/14/2022 17.2 Step 2: FI Slew Rate Control and MI Monitoring Remove the capacitive loading of the CHAN1 feed-forward capacitors by clicking on CH0-CH1 Connected (the displayed text will change to CH0-CH1 Disconnected). Set the oscilloscope trigger to 500mV and click on the “FI Ramp” button to capture FI and MI waveforms that match those shown below in Figure 32.

  • Page 32: Step 3: Fi Slew Rate Control And Mi Monitoring

    Whitney EVM Guide Rev A: 10/14/2022 17.3 Step 3: FI Slew Rate Control and MI Monitoring After executing FI RAMP, the FI_RAMPENA bit of the FI_RAMP register will be set. This will “lock-out” the FI register; changing the contents of the FI register will have no effect. If you wish to bypass the FI ramping feature and write the FI register directly to control the Force Current level, it will be necessary to first clear the FI_RAMPENA bit.

  • Page 33: Enabling And Setting Accurate Voltage Clamps

    FAST_SNK to -25 (-25mA), and FAST_SRC to 25 (+25mA). Set FI Level 1 to -20 (-20mA), FI Level 2 to 20 (+20mA), manually set the FF Capacitor to 100nf and the COMP Capacitor to 220pf (Whitney voltage clamps in the 20mA range are unstable with a 33pf COMP Capacitor).

  • Page 34: Step 2: Enabling And Setting Accurate Voltage Clamps

    Whitney EVM Guide Rev A: 10/14/2022 18.2 Step 2: Enabling and Setting Accurate Voltage Clamps Remove the capacitive loading of the CHAN1 feed-forward capacitors by clicking on CH0-CH1 Connected (the displayed text will change to CH0-CH1 Disconnected). Set the oscilloscope trigger to 0V and click on the “FI Ramp” button to capture rising and falling Force Current waveforms with the voltage levels clamped to +-800mV.

  • Page 35: Enabling And Setting Accurate Current Clamps

    Whitney EVM Guide Rev A: 10/14/2022 19 Enabling and Setting Accurate Current Clamps 19.1 Step 1: Enabling and Setting Accurate Current Clamps Disable CH0 by clicking on CHAN0 Enabled. Set Mode to Force Voltage and MI Range to 20mA. Set Voltage Range to VRNG3 and then back to VRNG2 to initialize internal LabView variables.

  • Page 36: Step 2: Enabling And Setting Accurate Current Clamps

    Whitney EVM Guide Rev A: 10/14/2022 19.2 Step 2: Enabling and Setting Accurate Current Clamps Remove the capacitive loading of the CHAN1 feed-forward capacitors by clicking on CH0-CH1 Connected (the displayed text will change to CH0-CH1 Disconnected). Set the oscilloscope trigger to 0V and click on the “FV Ramp” button to capture rising and falling Force Voltage waveforms with the current levels clamped to ±15mA.

  • Page 37: Force Voltage Ganging And Measure Current Monitoring

    Whitney EVM Guide Rev A: 10/14/2022 20 Force Voltage Ganging and Measure Current Monitoring 20.1 Step 1: FV Ganging and MI Monitoring Set Channel to CHAN0, Voltage Range to VRNG0, MI Range to 200mA. Manually set COMP Capacitor to 33pf and FF Capacitor to 1uf.

  • Page 38: Step 3: Fv Ganging And Mi Monitoring

    Whitney EVM Guide Rev A: 10/14/2022 20.3 Step 3: FV Ganging and MI Monitoring Connect a resistive load to SMA connector J39 that is capable of dissipating 400mA; the resistor value is not critical. Set FV Step Size to 2 and FV Level 2 to a voltage that will yield a 400mA current through the resistive load (in this example, 1.85V for a 4.625...

  • Page 39: Measuring Die Temperature

    22 Experimenting with Higher Supply Voltages At this point, you should feel confident enough to increase the Whitney supply voltages (to a maximum of (VCCO – VSUB) =< 70V) and experiment with higher current loads and larger voltage swings in VRNG4 or VRNG5 (use the Force Voltage digital ramp to minimize overshoot and limit the dynamic output current to safe levels).

Table of Contents