CDB5471 Cirrus Logic Inc, CDB5471 Datasheet
CDB5471
Specifications of CDB5471
Related parts for CDB5471
CDB5471 Summary of contents
Page 1
... P.O. Box 17847, Austin, Texas 78760 (512) 445 7222 FAX: (512) 445 7581 http://www.cirrus.com General Description The CDB5471 is an inexpensive tool designed to evalu- ate the functionality/performance of the CS5471 2- channel A/D Converter. In addition to this data sheet, the CS5471 Data Sheet is required in conjunction with the CDB5471 Evaluation Board ...
Page 2
... Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trade- marks and service marks can be found at http://www.cirrus.com. 2 CDB5471 DS480DB1 ...
Page 3
... Figure 2. Analog Inputs ..................................................................................... 12 Figure 3. Digital Circuitry ................................................................................... 13 Figure 4. Start-Up Window ................................................................................ 15 Figure 5. Conversion Window ........................................................................... 16 Figure 6. Data Collection Window (Time Domain) ............................................ 17 Figure 7. Configuration Window ........................................................................ 19 Figure 8. Data Collection Window (FFT) ........................................................... 20 Figure 9. Data Collection Window (Histogram) ................................................. 21 Figure 10.Silkscreen ........................................................................................... 22 Figure 11.Circuit Side ......................................................................................... 23 Figure 12.Solder Side......................................................................................... 24 DS480DB1 CDB5471 3 ...
Page 4
... The CDB5471 evaluation board provides a quick means of evaluating the CS5471. Analysis soft- ware supplied with the CDB5471 allows the user to observe the CS5471’s digital output data on the us- er’s PC monitor. The PC software allows the user to quantify the device’s performance in the time- domain and frequency domain ...
Page 5
... After this, operation of the PC software is described in detail. 2.2 Power Supply Connections The CDB5471 can be used in several different power supply configurations. Table 1 shows the various possible power connections with the re- quired jumper settings. There are various +3 V and +5 V options ...
Page 6
... HDR9. 2.3 Eval Board Control - Headers/Switches Table 2 lists the various adjustable headers and switches on the CDB5471 Evaluation Board, as well as their default settings (as shipped from the factory). The header settings can be adjusted by the user to select various options on the evaluation board ...
Page 7
... VIN1+ Set to BNC J9 IIN1- Set to BNC J12 IIN1- Set to BNC J10 GAIN input pin SW1-2 Open (GAIN=x1) SW1-1 Open (XIN/1024) VIN1- Set to BNC J11 VREFIN Set to on- chip reference Table 2. Default Header Settings CDB5471 Default Jumpers O O IIN3 AGND O O VIN3 AGND O ...
Page 8
... The 3 dB corner of the filter is approximately 50 kHz differential and common mode. Note that the CDB5471 Evaluation Board is also used as the evaluation board for the CS5451 A/D converter, which is a 6-channel version of the CS5471. The user can use this board to the evalu- ...
Page 9
... CS5471 device and/or to use the evaluation board as a platform for the prototype development of a digital power metering solution. However, note that the CDB5471 Evaluation Board is not in- tended to be integrated directly into a commercial digital power meter. The layout of the board is not optimized for practical power metering situations ...
Page 10
... The CDB5471 connects to the user’s IBM-compat- ible PC with the included 25-pin parallel port cable. The user should not connect this cable between the CDB5471 and the parallel port on the PC until all of the header options in Table 2 have been set to appropriate settings and the user has applied power to the CDB5471 ...
Page 11
U5 +5V TP40 CON_BANANA LM317LZ TP77 3.0V +5V_IN IN OUT 3 2 ADJ J21 C40 C42 C39 Z4 1 P6KE6V8P .1UF 10UF .1UF GND C38 Do Not Populate .33UF TANT CON_BANANA GND J18 C20 GND .1UF +3V GND HDR17 V+ ...
Page 12
J22 TP67 HDR2X2 J5 R23 301 0.1% BNC_RA C8 GND 4700PF TP66 HDR2X2 J7 R22 301 0.1% BNC_RA GND TP65 HDR2X2 J6 R21 301 0.1% BNC_RA C7 GND 4700PF TP64 HDR2X2 J8 R24 301 0.1% BNC_RA GND GND TP4 HDR2X2 ...
Page 13
HDR7X2 HDR19 1 2 OWRS 3 4 /RESET 5 6 /GAIN FSO 11 12 SCLK 13 14 SDO GND D+ SW1 R35 10K /GAIN 2 R34 10K OWRS 1 SW_DIP_2 GND /RESET R36 20K D+ ...
Page 14
... OK and the Run-Time En- gine will be installed there. 7) After the Run-Time Engine is installed, the user is prompted to enter the directory in which to install the CDB5471 software. Select OK to accept the default directory. 8) Once the program is installed, it can be run by double clicking on the EVAL5451 icon, or through the Start menu ...
Page 15
... Soft- ware Cycle Count:.” Note that the default value for this is set to 4000. Thus during every computation cycle, the PC software will acquire 4000 samples CDB5471 15 ...
Page 16
... Average” value is increased. The user should understand how to interpret the values that are displayed in the array of number boxes in the Conversion Window. For CDB5471, only the results displayed in the “Voltage 1” and “Current 1” rows are valid. The result values ...
Page 17
... CS5471 and analyze them using time domain, FFT, and histogram plots. The Data Collection Window is accessible through the Menu option press- ing F4. 3.2.4.1. Collect Button This button will collect data from the CS5471 analyzed in the plot area. See the section on Col- lecting Data Sets for more information. CDB5471 17 ...
Page 18
... The user can choose any whole- number power of 2 between 16 and 32768. 3.2.5.2. Average When performing FFT processing, this box will de- termine the number of FFTs to average. FFTs will then be collected and averaged when the user clicks on the Collect Button. CDB5471 DS480DB1 ...
Page 19
... Time Domain / FFT / Histogram se- lector to “Time Domain.” 3.2.7.1. Count Displays current x-position of the cursor on the time domain display. 3.2.7.2. Magnitude Displays current y-value of the cursor on the time domain display. 3.2.7.3. Maximum Indicator for the maximum value of the collected data set. CDB5471 19 ...
Page 20
... Indicator for the Signal-to-Noise Ratio, first 4 har- monics are note included (decibels). 3.2.8.6. S/PN Indicator for the Signal-to-Peak Noise Ratio (deci- bels). 3.2.8.7. FS-PdB Not using windowing, how far down from zero the peak voltage input value is (decibels). Figure 8. Data Collection Window (FFT) CDB5471 DS480DB1 ...
Page 21
... Indicator for the calculated variance of the collect- ed data set. 3.2.9.5. STD_DEV Indicator for the calculated standard deviation of the collected data set. 3.2.9.6. Maximum Indicator for the maximum value of the collected data set. 3.2.9.7. Minimum Indicator for the minimum value collected in the data set. CDB5471 21 ...
Page 22
... Figure 10. Silkscreen CDB5471 DS480DB1 ...
Page 23
... DS480DB1 Figure 11. Circuit Side CDB5471 23 ...
Page 24
... Figure 12. Solder Side CDB5471 DS480DB1 ...
Page 25
Notes • ...
Page 26
...