CRD5490-Z CRD5490-Z Power Monitor Features Overview * Easy-to-use Power Monitoring Reference Design - Plug one side into a wall outlet and an electric load into the other side. - Read real time measurements on the PC GUI via USB in seconds. The CRD5490-Z is designed to evaluate the functionality and performance of the CS5490 power/energy measurement device. The CRD5490-Z integrates an efficient and compact AC/DC drop capacitor/buck power supply, voltage and current sensors, and low-cost USB MCU. This compact, complete power monitor system integrates easily in any design evaluation. * Real Time Measurements: - Line Voltage - Load Current - Active Power - Reactive Power - Apparent Power - Power Factor - Fundamental Line Frequency - Temperature The CRD5490-Z was designed with a graphical user interface (GUI) for power measurements and calibration execution. A full-featured GUI is provided to access real time line voltage, load current, active power, reactive power, apparent power, power factor, and temperature. The software provides full access and control of the CS5490 calibration and configuration without having to learn specialized commands. * Operational Voltage 90VAC to 260VAC * Maximum RMS Load Current 15A * Factory Calibrated and Recalibration Capable * Compact AC/DC Buck Converter * Onboard PIC18 Microcontroller ORDERING INFORMATION CRD5490-Z Reference Design * Windows(R) GUI Software Cirrus Logic, Inc. http://www.cirrus.com Copyright Cirrus Logic, Inc. 2012 (All Rights Reserved) APR`12 DS988RD1 CRD5490-Z IMPORTANT SAFETY INSTRUCTIONS Read and follow all safety instructions prior to using this demonstration board. This Engineering Evaluation Unit or Demonstration Board must only be used for assessing IC performance in a laboratory setting. This product is not intended for any other use or incorporation into products for sale. This product must only be used by qualified technicians or professionals who are trained in the safety procedures associated with the use of demonstration boards. Risk of Electric Shock * The direct connection to the AC power line and the open and unprotected boards present a serious risk of electric shock and can cause serious injury or death. Extreme caution needs to be exercised while handling this board. * Avoid contact with the exposed conductor or terminals of components on the board. High voltage is present on exposed conductor and it may be present on terminals of any components directly or indirectly connected to the AC line. * Dangerous voltages and/or currents may be internally generated and accessible at various points across the board. * Charged capacitors store high voltage, even after the circuit has been disconnected from the AC line. * Make sure that the power source is off before wiring any connection. Make sure that all connectors are well connected before the power source is on. * Follow all laboratory safety procedures established by your employer and relevant safety regulations and guidelines, such as the ones listed under, OSHA General Industry Regulations - Subpart S and NFPA 70E. Suitable eye protection must be worn when working with or around demonstration boards. Always comply with your employer's policies regarding the use of personal protective equipment. All components and metallic parts may be extremely hot to touch when electrically active. Contacting Cirrus Logic Support For all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to you go to www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Microsoft Visual Studio, Windows 7, and Windows XP are either trademarks or registered trademarks of Microsoft Corporation. 2 DS988RD1 CRD5490-Z 1. CHARACTERISTICS AND SPECIFICATIONS 1.1 Recommended Operating Conditions Parameter Symbol Min Typ Max Unit Line Voltage VAC 90 - 260 V Load Current IRMS - - 15 A Peak Current IPEAK - - 22 A Fundamental Frequency Freq 5 - 2000 Hz TA -40 85 C Symbol Min Typ Max Unit PAC - 0.6 - W - 0.1 - % - 0.1 - % - 0.1 - % Reference Ambient Operating Temperature 1.2 Electrical Characteristics Parameter Reference Power Consumption (VAC = 240V, 50Hz) Accuracy (PF=1, Sample Count 8000 - 2 second, Temp Compensation Enabled) RMS Voltage (90-260VAC) RMS Current (15mA-15A) Active Power (1.5W-3900W) DS988RD1 VRMS IRMS PAVG 3 CRD5490-Z WARNING High Voltage Hazard When the CRD5490-Z is connected to AC lines, high voltage is present inside the box. Do not remove the protective cover from the CRD5490-Z when power is connected. The evaluation board connects directly to the AC power line and presents a serious risk of electric shock and can cause serious injury or death. Extreme caution needs to be exercised while handling this box. Make sure that the power source is off before wiring any connection. Make sure that all connectors are well connected before the power source is turned on. Make sure all AC power line wiring is secured to the box and away from contact before the power source is on. Refer to additional warnings at the beginning of this document. 2. HARDWARE OVERVIEW The CRD5490-Z includes sensors (line voltage and current shunt), a power supply, a CS5490 power monitor calculation engine, isolation, and an MCU. Figure 1 shows connections of each block. CRD5490-Z AC Voltage Divide Sensor Cap. Drop + Buck Supply Load Current Sensor Current Input Voltage Input CS5490 RX RESET Iso lation TX +3.3V MCU USB Figure 1. System Block Diagram Make sure that the power source is off before wiring any connection. The AC source is connected to plug IEC 60320 C14, and the AC load is connected to connector IEC 60320 C13. Make sure that all connectors are well connected before the power source is turned on. Make sure all AC power line wiring is secured to the box and away from contact before the power source is on. 4 DS988RD1 CRD5490-Z 2.1 Line Voltage Sensor The high-voltage AC line is attenuated using a voltage divider sensor comprised of five 1206 resistors before being supplied to the CS5490 voltage channel input. Figure 2 shows the resistor diagram for line voltage sensing. R1 is actually four large-value resistors, which increases the voltage rating. R2 is one 1K sense resistor. Refer to the vendor's specifications for voltage compliance. VIN R1 VOUT R2 Figure 2. Voltage Sensor Attenuator The divider ratio is determined by the maximum input range of the CS5490 voltage channel (176mVRMS) and the maximum line voltage. The division ratio is determined by Equation 1. R2 V OUT = V IN ---------------------- 176mV RMS R1 + R2 Eq. 1 For a line voltage, VIN = 260VRMS, and R2 = 1K, R1 can be solved. See Equation 2: V IN 260V R1 = R2 -------------- - 1 = 1000 ------------------- - 1 = 1.47M V OUT 176mV Eq. 2 To give a 115% margin and to select common resistor values, R1 = 115% 1.47M is selected and composed of four resistors: 4 422k. The voltage sense resistor (R2) must be referenced to the same potential as the current sensor and CS5490 power supply (located either on the Line or Neutral). By design, the CRD5490-Z is referenced to the Line side after the fuse. To switch the sensor reference, Line and Neutral of both the load and the source could be switched, and the fuse should be placed on the line externally. 2.2 Shunt Current Resistor The CRD5490-Z implements current sensing using a low-resistance shunt. When a shunt is used, the current channel's signal amplitude will be set by the shunt resistor using Ohm's Law, V = IR. To keep power dissipation low, it is necessary to use a low-resistance shunt. The current channel of the CS5490 provides a high gain setting (50x) to enable the use of a low-valued shunt. The maximum input amplitude for the current channel is 35mVRMS in the 50x gain range. Applying Ohm's law, VOUT = ISHUNTRSHUNT, use Equation 3 to solve for RSHUNT: V OUT 35.36mV R SHUNT = ------------------- = ------------------------ = 2.35m I SHUNT 15A Eq. 3 To give an 85% margin, the shunt should be reduced by RSHUNT = 85%2.35m = 2m. The power rating of the shunt should be at least twice the power dissipation on the shunt with the maximum continuous load current. With a maximum 15A load current, the CRD5490-Z uses a 2W shunt resistor. DS988RD1 5 CRD5490-Z 2.3 Power Supply The CRD5490-Z contains two separate power supply domains: isolated +5V USB supply and +3.3V non-isolated CS5490 power supply derived from the power line. The +3.3V non-isolated power supply circuit is designed to reduce the overall supply volume by creating a two-stage drop capacitor and buck supply. By selecting an efficient buck design instead of a simple voltage regulator, the rectified supply voltage is raised, the transferred power is increased, and the drop capacitor value is reduced. Reducing the value substantially reduces the capacitor's size. If size is not a factor, the more expensive buck design could be replaced with a simple voltage regulator. Figure 3 and Figure 4 show the two options evaluated for the CRD5490-Z design. Contact Cirrus Logic sales for assistance with a cost-reduced, regulator-only design. +35V AC Drop Capacitor and Rectifier +3.3V Buck Converter CS5490 Figure 3. Power Supply Option 1 +6V AC Drop Capacitor and Rectifier +3.3V +3.3V Regulator CS5490 Figure 4. Power Supply Option 2 2.4 MCU Purpose The CRD5490-Z is designed to minimize the requirements of the MCU. Virtually any low-cost MCU with non-volatile memory (NVM) can be used with the CS5490 device and software. The microchip MCU has the following purposes in the CRD5490-Z: - Store and reload calibration coefficients - Perform USB to UART transactions that mimic a serial COM port USB transactions are sent from the PC to the MCU. The MCU reads the first byte (character) and determines whether it should transmit the remaining bytes to the CS5490 as a Write/Read/DSP command or store or recall as calibration coefficients into NVM. All responses from the CS5490 are directly translated back to the PC via the MCU. MCU UART communication transactions can be viewed at the bottom of the GUI. Characters sent or received are displayed in hexadecimal format. Refer to Figure 26. 6 DS988RD1 CRD5490-Z 3. SOFTWARE OVERVIEW The evaluation board comes with software and a USB cable to link the evaluation board to the PC. The evaluation software was developed with Microsoft(R) Visual Studio(R) and was designed to run with Windows XPTM and Windows 7TM. The following procedure is based on Windows XP. 3.1 Installation Procedure Follow the steps below to install the GUI and the CDC driver software: 1. Access the following web site: http://www.cirrus.com/en/support. 2. Click the Energy Measurement link. 3. Click the CRD5490 link. The Software License web page is displayed. 4. To agree with the terms and conditions, click the Agree button. The File Download window is displayed. 5. Click the Save button. The Save As window is displayed. 6. Select a location to store the compressed folder. 7. Click the Save button. The Download complete window is displayed. 8. Click the Open Folder button. The location where the compressed folder is stored is displayed. 9. Right-click on the compressed folder, and click Extract All. 10. Select a location to extract the files. 11. Navigate to the location where the extracted files are stored and double-click on the setup.exe file. Figure 5. Location of the Unzipped Files DS988RD1 7 CRD5490-Z The application will verify system requirements. The Application Install - Security Warning window is displayed. Figure 6. Application Install - Security Warning Window 12. Click the Install button. 13. Follow the instructions of the Microsoft.Net Framework installation. The Microsoft.Net Framework may need to be installed on the system. Internet access may be required to install the Framework or language packs. The download will start automatically. If installation stops after Framework is installed, select setup.exe from step 11. The installation program will automatically load the application after installation. If the CDC driver is already installed and the CRD5490-Z is connected (AC power and USB cable), then the CRD5490-Z will be recognized and ready. If the CDC driver is not installed, connect the USB and AC power source, then install the serial CDC Driver when Windows recognizes the device. Refer to Appendix 2: CDC Driver Installation on page 26 for more details. 14. If necessary, execute the GUI using the next section, 3.1.1 Executing the GUI. 3.1.1 Executing the GUI 1. From the Start menu, click All Programs. 2. Click Cirrus Logic. 3. Click Cirrus Power Monitor (CS5490). The GUI is launched. 8 DS988RD1 CRD5490-Z 3.2 Using the Software Before launching the software, ensure that all of the cables connected to the CRD5490-Z are installed (as described in the Hardware Overview section on page 4) and connect the board to an open USB port on the PC using the provided cable. Once the board is powered through the AC line and USB, the software program can be launched. WARNING High Voltage Hazard When the CRD5490-Z is connected to AC lines, high voltage is present inside the box. Do not remove the protective cover from the CRD5490-Z when power is connected. The evaluation board connects directly to the AC power line and presents a serious risk of electric shock and can cause serious injury or death. Extreme caution needs to be exercised while handling this box. Make sure that the power source is off before wiring any connection. Make sure that all connectors are well connected before the power source is turned on. Make sure all AC power line wiring is secured to the box and away from contact before the power source is on. Refer to additional warnings at the beginning of this document. 3.3 Start-up Window When the software is launched, the Cirrus Logic - Power Monitor window is displayed. This window contains information about the software's title, version, and device revision number. See Figure 7. Figure 7. Cirrus Logic - Power monitor Window The tabs in this window provide access to GUI functions. The following subsections describe the tabs in this window. DS988RD1 9 CRD5490-Z 3.3.1 Connection Tab The Connection tab displays the USB communication with CRD5490-Z board. At startup, the GUI attempts to establish a connection to the CRD5490-Z to the PC through the last USB device connected. Once the USB communication has been established, the CS5490 serial port will report the Device Revision on the Connection tab. If the software is unable to establish a communication link with the CRD5490-Z board, a message is displayed indicating that the initial communication has failed. This message is displayed in Figure 8. Figure 8. Connection Tab with Communication Error Displayed 3.3.1.1 * * * * * Common Causes of Communication Error No AC power USB cable is not connected USB cable to the CRD was not the last device connected before loading the GUI Windows is not given time to recognize the device and assign a serial port The wrong serial port is assigned because the GUI was loaded before the above items were met 3.3.1.2 Fixing Communication Problems 1. Close the GUI. 2. Remove the power to the CRD5490-Z by turning off the AC source. 3. Remove the power to the MCU by removing the USB cable from the PC. 4. Check that the AC power connections are secure. 5. Connect the USB cable to the PC. 6. Wait for Windows to detect the CDC Device. Verify the port by opening the Device Manager and reviewing the port assignments (run "devmgmt.msc" at a command prompt or Windows 7 search). 7. Apply AC power and wait a second. 8. Reload the GUI. 10 DS988RD1 CRD5490-Z 3.3.2 Quick Measurements Tab The Quick Measurements tab displays reported power data from the CS5490 device in real time as continuous conversions are performed. Refer to the CS5490 data sheet, entitled Two Channel Energy Measurement IC, for more information about continuous conversion. Figure 9. Quick Measurements Tab - Idle Figure 10. Quick Measurements Tab - Continuous Convert DS988RD1 11 CRD5490-Z The Connection, Graphics, and Quick Measurements tabs may be viewed with the conversions running, but the continuous conversions should be stopped before moving to the Data Table, Calibration, or Register Write/Read tabs. 3.3.2.1 START Button The START button starts continuous conversions execution until the STOP button is clicked. The power measurements are updated with present values in the CS5490 data registers after each conversion. The refresh rate is configured by the SampleCount or CycleCount register. 3.3.2.2 Change Sample Count Button Whether this option is available depends on the CS5490 device revision and configuration. The default low-rate refresh rate for data is 1 second, or 4000 samples. Click the Change Sample Count button to change the SampleCount register. Enter a larger number of samples to slow the low-rate refresh rate. It is not recommended to reduce the SampleCount below 2000 samples. 3.3.2.3 Change Cycle Count Button Whether this option is available depends on the CS5490 device revision and configuration. The default low-rate refresh rate for data is 1 second, or 100 line cycles at 50Hz. The CS5490 counts the samples in a half-line cycle and updates the SampleCount register automatically based on the CycleCount entered. Click the Change Cycle Count button to change the CycleCount register. Enter a larger number of cycles to slow the low-rate refresh rate. It is not recommended to reduce the CycleCount 50 cycles. 3.3.3 Graphics Tab The Graphics tab displays the power data of the CS5490 versus low-rate samples in individual charts. To view data in real time, click the START button on the Quick Measurements tab, which initiates conversions, and then click the Graphics tab to bring it forward. Figure 11. Graphics Tab 12 DS988RD1 CRD5490-Z The charts' scales will automatically adjust for the data captured. To zoom in on a portion of a chart, click in the chart and drag a box over the portion to be enlarged. Scroll bars are displayed in the magnified chart. See Figure 12. Selected Chart Area Selected Chart Area Magnified Figure 12. Graphics Tab with Chart Zoom Example It is recommended to stop conversions before clicking on charts. Transactions are stopped when selecting a chart, and samples may be missed. 3.3.3.1 Max Samples Field The charts will display a maximum number of samples based on the value entered in the Max Samples field. It is recommended to stop conversions before entering new values into the Max Samples field. Changes take effect immediately. The Max Samples field should not be made too large. Otherwise, the window will update slowly and samples will be missed. When using the default sample count, generally the Maximum Samples field should be less than 500 samples and may vary depending on the PC hardware. To view a larger number of samples without missing samples, click the Quick Measurements tab to bring it forward, wait for data to be collected, stop conversions, and then click on the Graphics tab to bring it forward. 3.3.3.2 Clear Chart Button The Clear Chart button clears all the charts. DS988RD1 13 CRD5490-Z 3.3.4 Data Table Tab The Data Table tab displays the CS5490 power information in a table. Stop conversions before viewing the Data Table tab. Figure 13. Data Table Tab 3.3.4.1 Write Table Button The Write Table button writes the full data table to a comma-delimited file (*.csv) using Windows' standard file window. Select the directory location and filename in the Save As window. 3.3.4.2 Clear Table Button The Clear Table button clears the table. 14 DS988RD1 CRD5490-Z 3.3.5 Calibration Tab The Calibration tab is used to write and display to the CS5490 offset and gain calibration registers. The built-in calibration sequences of the CS5490 that are used to set the calibration register can be initiated from the Calibration tab. AC offset and gain calibration can be performed on the voltage channel, the current channel, or both simultaneously. Refer to the CS5490 data sheet, entitled Two Channel Energy Measurement IC, and Application Note AN366, entitled CS5480/84/90 Energy Measurement IC Calibration, for more details on calibration. The Calibration tab is illustrated in Figure 14. Figure 14. Calibration Tab To access the Calibration tab, conversion must be stopped. Otherwise, the Quick Measurements tab will be displayed with the error message shown in Figure 15. Figure 15. Quick Measurements Tab with Error Message Displayed (Partially Illustrated) The Refresh button updates the contents of the screen by reading all the register values from the CS5490. It is recommended to click the Refresh button when entering the Calibration tab or after modifying any registers to reflect the current status of the CS5490. DS988RD1 15 CRD5490-Z 3.3.5.1 AC Offset / Gain Register In the AC Offset and Gain fields, the AC offset and gain registers for all channels are displayed in hexadecimal format. These registers can be modified directly by typing values in the fields and then pressing Enter on the keyboard. The AC offset register only affects the current channel's IRMS register values. 3.3.5.2 Performing Calibrations To ensure accurate results, Gain calibration should be performed before AC offset calibration. The gain calibration can be performed on both the voltage and current channels of the CS5490. The AC offset calibration can be performed only on the current channel. In the CS5490, the initial values in the calibration registers affect the results of the calibration. The register values are shown in blue in Figure 14. Before calibration, the gain and offset registers should be configured in their default state 0x 40 0000 (gain = 1) for gain registers and 0x 00 0000 (clear = 0) for offset registers. Gain Calibration For gain calibration, the CRD5490-Z software configures the gain registers prior to setting up calibration based on the reference meter readings. The CRD5490-Z software uses the non-full scale gain calibration techniques and formulas in Appendix 3: Non-Full Scale Gain Calibration (see page 33) to set up the CS5490 voltage and current channel gain registers before calibration. The AC offset register values are not modified by the software, and the current configuration are used. The default AC offset register value should be 0x 00 0000. 1. Attach an AC reference meter as configured in Figure 16. It is important to use short and large gauge wires to attach the reference power meter to reduce error. GUI USB AC SOURCE CRD5490-Z * Reference Power Meter (V, A) AC Load Figure 16. Gain Calibration Configuration 2. Attach and turn on an AC source. 3. Attach and turn on AC load. For this example, a 200W light bulb is used, but it is recommended to use a load that is at a minimum of 1/2 of the full-scale load current. 16 DS988RD1 CRD5490-Z 4. Confirm that the initial conditions are configured as shown in Figure 17: Figure 17. Calibration Tab with Initial Calibration Configuration 5. Click the Quick Measurements tab to bring it forward, and click the START button. 6. Wait approximately 5 to 10 seconds for the readings to update. 7. Click the STOP button. DS988RD1 17 CRD5490-Z 8. Record the reference meter measurements after the setup has settled and before calibration is executed. See Figure 18. Figure 18. Calibration Tab with Reference Meter Reading 9. Click the Gain Calibration button. 10. A confirmation message is displayed, as shown in Figure 19. Figure 19. Calibration Tab with Confirmation Message 18 DS988RD1 CRD5490-Z If the calibration conditions (voltage and current) match the reference meter readings, click the Yes button. 11. The gain register values automatically update when the calibration is complete. Figure 20. Calibration Tab with Gain Register Updated After Gain Calibration 12. To confirm results click the Quick Measurements tab to bring it forward, and click the START button. Figure 21. Quick Measurements Tab Showing Results that Should Match the Reference Meter 13. Results should match the reference meter readings. DS988RD1 19 CRD5490-Z AC Offset Calibrations For AC offset calibration, the CRD5490-Z software clears the offset register before calibration begins. The gain register values are not modified by the software, and the current configuration is used from the prior gain calibration. AC calibration only affects the current channel's IRMS value. 1. Continue from step 13 in the Gain Calibration section on page 16 and keep the AC source on. 2. Remove the AC load. 3. Open the Quick Measurements tab and click the START button. 4. Wait approximately 5 to 10 seconds for readings to update. 5. Click the STOP button. 6. Confirm that the current is as expected during a no-load condition. Inspect the pre-calibrated IRMS closely. Figure 22. Quick Measurements Tab - Note IRMS before AC Offset Calibration 7. Click the Calibration tab to bring it forward, and click the AC Offset Calibration button. 20 DS988RD1 CRD5490-Z 8. Confirm the load has been removed or turned off, and then click Yes from the CONFIRM LOAD window shown in Figure 23. Figure 23. Calibration Tab with CONFIRM LOAD Window 9. The offset register value automatically updates when the calibration is completed (approximately 5 seconds). The AC Offset register value should change. Figure 24. AC Offset Register Updated After AC Offset Calibration DS988RD1 21 CRD5490-Z 10. To confirm results, click the Quick Measurements tab to bring it forward, and click the START button. Figure 25. Confirm IRMS Reduced After AC Offset Calibration Results should show a reduction in the IRMS value without the load. 22 DS988RD1 CRD5490-Z 3.3.6 Register Write/Read Tab The Register Write/Read tab allows access to the CS5490 registers directly. See Figure 26. Figure 26. Register Write/Read Tab - Read There are two types of transactions: Write and Read. The CS5490 memory is organized by pages. In order to properly write a register, it is necessary to set the Page, Address, and Data field and then click the Write button. To read a register it is necessary to set the Page and Address and then click the Read button. Figure 26 shows the read operation. The serial port traffic can be seen in the bottom left corner. The register result is displayed in the Data Write/Read (hex) field. Refer to the CS5490 data sheet, entitled Two Channel Energy Measurement IC, for more details on registers and commands. Note that the write data in the Port Communication field has an extra leading command byte - "52" in the example. This is a read command for the MCU. Read data does not contain an extra byte. Common CS5490 registers can be written to a file using the SAVE button in the Device Configuration panel. The LOAD button is used to recall the common CS5490 registers that were previously saved. It is recommended to configure the device using the Write button, start conversions from the Quick Measurements tab, stop conversions, and then save the current configuration to a file. DS988RD1 23 CRD5490-Z 4. REVISION HISTORY Revision Date RD1 APR 2012 24 Changes Initial Release. DS988RD1 CRD5490-Z APPENDIX 1: CRD5490 GUI REMOVAL Follow the steps below to remove the CS5490 GUI software: 1. From the Start menu, click Control Panel. The Control Panel window is displayed. Figure 27. Control Panel Window 2. Click Add or Remove Programs. The Add or Remove Programs window is displayed. 3. Highlight to select the Cirrus Power Monitor (CRD5490) item, as shown in Figure 28. Figure 28. Add or Remove Programs with Cirrus Power Monitor (CRD5490) Displayed 4. Click the Change/Remove button, and follow the instructions. The CS5490 GUI is removed. DS988RD1 25 CRD5490-Z APPENDIX 2: CDC DRIVER INSTALLATION This Appendix includes the procedures for installing the CDC driver for both Windows 7 and Windows XP. 2.1 Installing the CDC Driver Using Windows 7 Follow the instructions below to install the CDC driver on the Windows 7 operating system. 1. Connect the provided USB cable from the CRD5490-Z to the PC. Windows will recognize the device. 2. From the Start menu, select Devices and Printers. 3. Right-click the CDC RS-232 Emulation Demo icon. Figure 29. Start Menu with Drivers and Printers Selected The CDC RS-232 Emulation Demo Properties Window is displayed. 4. Click the Hardware tab to bring it forward. 26 DS988RD1 CRD5490-Z 5. Click the Properties button Figure 30. CDC RS-232 Emulation Demo Properties Window 6. Click the General tab to bring it forward, and click the Change Settings button. Figure 31. General Tab with the Change Settings Button Highlighted DS988RD1 27 CRD5490-Z 7. Click the Update Driver button. Figure 32. General Tab with the Update Driver Button Active The Update Driver Software CDC RS-232 Emulation Demo panel is displayed. 8. Click Browse my computer for driver software. Figure 33. Update Driver Software Panel Options (Partially Illustrated) 9. Select the extracted file location, then select the. \inf\win2K_winxp\ directory. 28 DS988RD1 CRD5490-Z 10. Follow the installation instructions. If warnings are displayed, select to continue anyway. Figure 34. Windows Security Warning 11. Right-click the device. A pop-up menu is displayed. Figure 35. Pop-up Menu DS988RD1 29 CRD5490-Z 12. Click Properties. The Communications Port (COM3) Properties window is displayed. Figure 36. Communications Port (COM3) Properties Window The next time this device is used, it will be recognized, and installing the driver will not be necessary. 2.2 Installing the CDC Driver Using Windows XP Follow the instructions below to install the CDC driver on the Windows XP operating system. 1. Connect the provided USB cable from the CRD5490-Z to the PC. Windows XP recognizes the device, and the Found New Hardware Wizard opens. Select to install from a specific location. Figure 37. Found New Hardware Wizard Window 30 DS988RD1 CRD5490-Z 2. Locate the driver information file provided with the software installation and browse to the driver file: \ inf \ win2K_winxp \ Figure 38. Browse For Folder Window 3. Click the OK button. 4. Click the Next and follow the instructions. If warnings are displayed, select to continue. Figure 39. Found New Hardware Wizard Window Showing Files Being Transferred DS988RD1 31 CRD5490-Z 5. When the installation is complete, click the Finish button. Figure 40. Found New Hardware Wizard Window with a Message that Installation Is Complete The next time this device is used on the computer, it will be recognized, and the installation of the driver will not be necessary. 32 DS988RD1 CRD5490-Z APPENDIX 3: NON-FULL SCALE GAIN CALIBRATION When resources are limited, it may be necessary to provide non-full-scale amplitudes and perform built-in calibration. To perform a non-full-scale calibration, the initial gain register conditions of the device must be identified before calibration. Usually, initial gain register conditions are set to a default value of one, but this is not required. Instead, the initial gain register conditions are set to accommodate the non-full-scale input calibration. Before calibration is executed, the gain register can be set using the following equations: V MAX 22 V GAIN pre = --------------- 2 V REF [Eq: 1] I MAX 22 I GAIN pre = ------------ 2 I REF [Eq: 2] where: VGAIN(pre) Value stored in voltage gain register (page 16, address 35) before calibration starts IGAIN(pre) Value stored in current gain register (page 16, address 33) before calibration starts VMAX Maximum voltage of the meter defined by customer IMAX Maximum current of the meter defined by customer VREF Voltage of the line just before calibration as measured with reference meter assumes stable input IREF Load current just before calibration as measured with reference meter assumes stable input Follow the steps below to perform a non-full-scale gain calibration: 1. Set the line voltage and load current VREF and IREF, respectively. 2. Confirm that the reference meter shows VREF and IREF of the input. 3. Set VGAIN(pre) per Equation 1 and IGAIN(pre) per Equation 2. 4. Send the calibration command. 5. After calibration, the meter will be adjusted for a full-scale voltage of VMAX and IMAX and will currently be measuring the VREF and IREF measurements. Reference Limits The calibration line voltage (VREF) or load current (IREF) must not be set too low. It is recommended to keep the register values at a minimum of 1/2 of the maximum levels. Since the gain register can be set to a maximum value of 4, the input could be set to 1/4 of the maximum levels. It is not recommended to set the input to 1/4 of the maximum levels due to variations in setup conditions. If the input is too low, the gain register will set the default value of one after calibration. DS988RD1 33 CRD5490-Z Current Scale Register To perform calibration with less than full scale load without using the above procedure, it is possible to set the current channel's Scale register. The current channel calibration data path contains a Scale register (page 18, address 63) that can be adjusted before calibration to accommodate the non-full-scale load. I REF 23 I SCALE = ------------ 0.6 2 I MAX [Eq: 3] where: ISCALE Value stored in the SCALE register before calibration IMAX Maximum current of the meter defined by the customer IREF Load current before calibration, as measured with a reference meter, assuming stable input Follow the steps below to set the current channel's Scale register. 1. Set the load current, IREF (assuming VREF is set to full scale). 2. Confirm that the reference meter shows VREF and IREF of the input. 3. Set ISCALE per Equation 3. 4. Send the calibration command. 5. After calibration, the meter will be adjusted for a full-scale voltage of VMAX and IMAX and will currently be measuring the VREF and IREF measurements. 6. The Scale register is not in the normal data path but instead in the calibration path. 34 DS988RD1 DS988RD1 4. SCHEMATIC CRD5490-Z 35 36 5. BILL OF MATERIALS BOM#: 505-00554-Z1 Rev: A2 Date Generated: 03/21/2012 Line Item Part Cirrus PN Ass 0001 P 011-00068-Z1 0002 P 011-00051-Z1 0003 P 012-00198-Z1 BOM Desc: PWA CRD5490-Z-NPb Rev Description Status Qty UM Ref Desg Man'f Man'f PN A A A CAP 0.33uF 10% 310V MTL FLM NPb TH CAP 10nF 20% 440V MTL FLM NPb TH CAP 100uF 20% 50V ELE NPb RAD 8X12 A A A 1 EA 1 EA 1 EA C1 C2 C3 BC COMPONENTS BC COMPONENTS UNITED CHEMI-CON BFC233912334 BFC233814103 ELXZ500ELL101MH12D ECO Effective Date Notes LTime 7 7 7 0004 P 001-02189-Z1 A CAP 0.1uF 10% 16V X7R NPb 0603 A 7 EA C4 C7 C9 C10 C11 C21 C25 KEMET KOA VENKEL PANASONIC NIC COMPONENTS WALSIN C0603C104K4RAC ECO922 X7R0603CTTD104K C0603X7R160-104KNE ECJ1VB1C104K NMC0603X7R104K16TR PF 0603B104K160CT 0 0005 P 001-01997-Z1 A CAP 0.01uF 10% 25V X7R NPb 0603 A 1 EA C5 P 004-00068-Z1 A CAP 4.7uF 10% 10V NPb TANT CASE A A 1 EA C6 C0603C103K3RAC X7R0603ETTD103K ECJ1VB1E103K T491A475K010AT TA010TCM475KAR TAJA475K010R C0603C220K5GAC 0603N220K500LT C0603C223K5RAC ECJ1VB1H223K C0603C221J5RAC X7R0603HTTD221J ECJ1VB1H221J NMC0603NPO220J50TR PF ECJ1VC1H220J 0603N220J500LT 7 0006 KEMET KOA PANASONIC KEMET VENKEL AVX KEMET WALSIN KEMET PANASONIC KEMET KOA PANASONIC NIC COMPONENTS PANASONIC WALSIN C0805C220K5GAC NPO0805HTTD220K ECJ2VC1H220K C0805C225K8RAC C0603C472K5RAC ECJ1VB1H472K 0603B472K500CT EEEFK1A681P C3216X7R1H105K C0603C474K8PAC 0603X474K100CT S1GB-13-F SP0503BAHTG LB Q39G-L2N2-35-1 7 ECO922 SEE COMMENTS ECO922 SEE COMMENTS 0007 P 001-10127-Z1 A CAP 22pF 10% 50V C0G NPb 0603 A 1 EA C8 0008 P 001-02068-Z1 A CAP 0.022uF 10% 50V X7R NPb 0603 A 2 EA C12 C13 0009 P 001-01621-Z1 A CAP 220pF 5% 50V X7R NPb 0603 A 4 EA C14 C15 C19 C20 0010 P 001-10048-Z1 A CAP 22pF 5% 50V C0G NPb 0603 A 1 EA C16 0011 P 001-02780-Z1 A CAP 22pF 10% 50V C0G NPb 0805 A 1 EA C17 0012 0013 P P 001-10193-Z1 001-01937-Z1 A A CAP 2.2uF 10% 10V X7R NPb 0805 CAP 4700pF 10% 50V X7R NPb 0603 A A 1 EA 1 EA C18 C22 0014 0015 0016 P P P 012-00212-Z1 001-10152-Z1 001-10192-Z1 A A A CAP 680uF 20% 10V ELEC NPb CASE F CAP 1uF 10% 50V X7R NPb 1206 CAP 0.47uF 10% 10V X5R NPb 0603 A A A 1 EA 1 EA 1 EA C23 C26 C27 0017 0018 0019 P P P 070-00173-Z1 070-00055-Z1 165-00060-Z1 A A A DIODE RECT 1A 400V NPb SMB DIODE ARRAY 5V (TVS) ESD NPb SOT143 LED BLU 470nm 5mA 45MCD NPb 0603 A A A 1 EA 1 EA 1 EA D1 D2 D3 KEMET KOA PANASONIC KEMET KEMET PANASONIC WALSIN PANASONIC TDK KEMET WALSIN DIODES INC LITTELFUSE OSRAM 0020 0021 P P 110-00340-Z1 303-00008-Z1 A A CON TERM .11PCB TAB NPb TH FUSE CLIP PC MOUNT 5MM NPb A A 4 EA 2 EA E1 E2 E3 E4 F1 TYCO KEYSTONE 61968-1 3517 0023 0024 P P 115-00162-Z1 115-00258-Z1 A A HDR 6x1 ML .1"CTR 062 S GLD NPb TH HDR 4x2 ML .1" 093BD ST GLD NPb TH A A 1 EA 1 EA J1 J2 0025 0026 0027 0028 P P P P 110-00263-Z1 145-00040-Z1 040-00149-Z1 304-00004-Z1 A A A A CON USB RCPT RA 5POS MINI-B NPb TH FE 1.5A 80 ohm@100MHz NPb 0805 IND 1000uH 10% 300mA NPb RAD SPCR STANDOFF 4-40 THR .500"L NPb A A A A 1 1 1 0 J3 L1 L2 MH1 MH2 MH3 MH4 0029 P 071-00046-Z1 A TRAN SIG NPN 40V 0.2A NPb TO-92 A 1 EA SAMTEC SAMTEC TONGYUEQING MOLEX STEWARD BOURNS KEYSTONE JIAXINGLONG FAIRCHILD SEMICONDUCTOR TSW-106-07-G-S TSW-104-08-G-D PHED-DS008G1ABONA 54819-0519 MI0805K400R-10 RLB0914-102KL 2203 M3X13 2N3904 EA EA EA EA Q1 7 7 7 7 7 7 7 ECO937 7 7 7 7 89.999 7 0 7 19.999 7 ECO922 NO POP 7 7 7 7 7 Figure 41. Bill of Materials (Page 1 of 2) CRD5490-Z DS988RD1 DS988RD1 BOM#: 505-00554-Z1 Rev: A2 Date Generated: 03/21/2012 Line Item Part Cirrus PN Ass 0030 P 031-00054-Z1 0031 P 020-06493-Z1 BOM Desc: PWA CRD5490-Z-NPb Rev Description Status Qty UM Ref Desg Man'f A A RES 270 OHM 3W 5% MTL FLM NPb AXL RES 0.002 OHM 2W 1% NPb 2512 P A 1 EA 1 EA R1 R2 PANASONIC ERG3SJ271 STACKPOLE ELECTRONICS CSNL2512FT2L00 DALE DALE KOA WALSIN KOA NIC COMPONENTS DALE PANASONIC DALE VENKEL PANASONIC NIC COMPONENTS YAGEO WALSIN DALE KOA PANASONIC WALSIN DALE PANASONIC DALE NIC COMPONENTS KOA PANASONIC DALE NIC COMPONENTS PANASONIC VENKEL WALSIN STACKPOLE DALE KOA YAGEO NIC COMPONENTS PANASONIC WALSIN DALE KOA PANASONIC KEYSTONE CGG VISHAY CIRRUS LOGIC MICROCHIP ON SEMICONDUCTOR EPCOS EPCOS McMASTER-CARR ABRACON 0032 0033 P P 020-06362-Z1 020-01016-Z1 A A RES 422k OHM 1/4W 1% NPb 1206 RES 1k OHM 1/10W 1% NPb 0603 FILM A A 4 EA 7 EA R3 R4 R5 R6 R7 R8 R9 R10 R11 R15 R21 0034 P 021-00238-Z1 A RES 680 OHM 1/10W 5% NPb 0603 FILM A 1 EA R12 0035 P 021-00258-Z1 A RES 4.7k OHM 1/10W 5% NPb 0603 FLM A 3 EA R13 R14 R16 0036 P 021-00259-Z1 A RES 5.1k OHM 1/10W 5% NPb 0603 FIL A 2 EA R17 R19 0037 P 021-00253-Z1 A RES 3k OHM 1/10W 5% NPb 0603 FILM A 1 EA R18 0038 P 021-00292-Z1 A RES 120k OHM 1/10W 5% NPb 0603 FIL A 2 EA R20 R25 0039 P 020-00673-Z1 A RES 0 OHM 1/10W 5% NPb 0603 FILM A 3 EA R22 R27 R28 0040 0041 P P 031-00070-Z1 021-00218-Z1 A A RES 1M OHM 1/2W 5% CF NPb AXL RES 100 OHM 1/10W 5% NPb 0603 FILM A A 1 EA 1 EA R23 R24 0042 P 021-00294-Z1 A RES 150k OHM 1/10W 5% NPb 0603 A 1 EA R26 0043 P 110-00045-Z1 A CON TEST PT .1"CTR TIN PLAT NPb BLK A 3 EA TP1 TP3 TP4 0044 0045 0046 0047 0048 P P P P P 175-00030-Z1 065-00334-Z3 062-00242-Z1 060-00614-Z1 036-00018-Z1 A B0 A A A OPT COUPLER PHOTOTRANS NPb DIP4 IC CRUS ENER MEAS NPb SOIC16L IC MCU 8b FLASH 768kx16 NPb QFN20 IC CONV SW BUCK 0.5A NPb SOIC8 VARISTOR 275Vrms 10MM NPb RAD A I A A A 3 1 1 1 1 U2 U5 U6 U4 U7 U8 VR1 0049 0050 P P 300-00004-Z1 100-00132-Z1 A A SCREW 4-40X1/4"L PH STEEL NPb XTL 4.096MHZ 30ppm 18pF NPb SMD A A 0 EA 1 EA XMH1 XMH2 XMH3 XMH4 Y1 0051 0052 0053 0054 0055 0056 0057 0058 0059 P P P P P P A P P 100-00134-Z1 070-00209-Z1 070-00210-Z1 240-00554-Z1 603-00554-Z1 600-00554-Z1 422-00013-Z1 180-00024-Z1 001-02189-Z1 A A A A A1 A2 D A A XTL 12.0MHZ 18pf 30p NPb HC49/US SM DIODE ZEN 36V 1W 5% NPb SMA DIODE SCHOTTKY 40V 1A NPb SOD123 PCB CRD5490-Z-NPb ASSY DWG CRD5490-Z-NPb SCHEM CRD5490-Z-NPb LBL SUBASSY PRODUCT ID AND REV FUSE 16A 250V TLAG NPb 5x20MM CAP 0.1uF 10% 16V X7R NPb 0603 A A A A A A A A A 1 1 1 1 1 1 1 1 0 Y2 Z1 Z3 EA EA EA EA EA EA EA EA EA REF REF EA EA EA ZZ5 C24 Figure 42. Bill of Materials (Page 2 of 2) CRCW1206422KFKEA CRCW06031K00FKEA RK73H1JTTD1001F WR06X1001FTL RK73B1JTTD681J NRC06J681TRF CRCW0603680RJNEA ERJ3GEYJ681V CRCW06034K70JNEA CR0603-10W-472JT ERJ3GEYJ472V NRC06J472TRF 9C06031A4701JLHFT WR06X472JTL CRCW06035K10JNEA RK73B1JTTD512J ERJ3GEYJ512V WR06X512JTL CRCW06033K00JNEA ERJ3GEYJ302V CRCW0603120KJNEA NRC06J124TRF RK73B1JTTD124J ERJ3GEYJ124V CRCW06030000Z0EA NRC0606ZOTRF ERJ3EKF0R00V CR0603-10W-000T WR06X000PTL CFM12JT1M00 CRCW0603100RJNEA RK73B1JTTD101J 9C06031A1000JLHFT NRC06J101TRF ERJ3GEYJ101V WR06X101JTL CRCW0603150KJNEA RK73B1JTTD154J ERJ3GEYJ154V 5001 TP-105(BLK) SFH610A-3 CS5490-ISZ/B0 PIC18F14K50-I/MQ LM2594DADJR2G B72210S2271K101 S10K275E2 90190A106 ABLS2-4.096MHZ-D4YT ATS120BSM-1 1SMA4753 1N5819HW-7-F 240-00554-Z1 603-00554-Z1 600-00554-Z1 422-00013-01 0034.3129 C0603C104K4RAC X7R0603CTTD104K C0603X7R160-104KNE ECJ1VB1C104K NMC0603X7R104K16TR PF 0603B104K160CT ECO Effective Date Notes LTime 30.002 7 7 7 7 7 7 7 7 7 ECO937 ALT LINE 60 7 7 7 7 7 7 7 7 7 ECO922 NO POP ECO922 ECO922/937 ECO922 NO POP 7 7 7 7 0 7 7 7 0 7 0 37 CRD5490-Z CTS TAIWAN SEMICONDUCTOR DIODES INC CIRRUS LOGIC CIRRUS LOGIC CIRRUS LOGIC CIRRUS LOGIC SCHURTER INC KEMET KOA VENKEL PANASONIC NIC COMPONENTS WALSIN Man'f PN 38 6. LAYOUT Figure 43. Top Routing CRD5490-Z DS988RD1 DS988RD1 Figure 44. Bottom Routing CRD5490-Z 39 40 Figure 45. Silkscreen CRD5490-Z DS988RD1 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Cirrus Logic: CRD5490-Z