Cirrus-logic CDB5451A Manuel d'utilisateur

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Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright © Cirrus Logic, Inc. 2001
(All Rights Reserved)
http://www.cirrus.com
CDB5451A
CDB5451A Evaluation Board and Software
Nov ‘03
DS458DB3
Features
Direct Shunt Sensor and Current
Transformer Interface for 3-Phase Power
On-Board Voltage Reference
On-board crystal for XIN
Digital Interface to PC
Lab Windows/CVI
Evaluation Software
- Real-Time RMS calculation
- Fast Fourier Transform (FFT) Analysis
- Time Domain Analysis
- Noise Histogram Analysis
General Description
The CDB5451A is an inexpensive tool designed to eval-
uate the functionality/performance of the CS5451A 6-
channel A/D Converter. In addition to this data sheet, the
CS5451A Data Sheet is required in conjunction with the
CDB5451A Evaluation Board.
Six terminal block connectors serve as inputs to the
CS5451A’s six analog input pairs. The CDB5451A in-
cludes an optional voltage reference source for
CS5451A. A 4.096MHz crystal is provided as a source
for the CS5451A XIN pin, or an external clock source can
be supplied by the user. Digital output data from the
CS5451A is transferred to the user’s IBM-compatible PC
via the included 25-pin parallel port cable.
The CDB5451A includes PC software, allowing the user
to perform data capture (includes option for time domain
analysis, histogram analysis, and frequency domain
analysis). The software also allows real-time RMS calcu-
lation/analysis to be performed simultaneously on all six
channels.
ORDERING INFORMATION
CDB5451A Evaluation Board
VA-
VA+
GAIN
OWRS
SE
RESET
FSO
SDO
CLK
CPD
V
REF
IN OUT
CS5451A
VIN1+
VIN1-
IIN1+
IIN1-
VIN2+
VIN2-
IIN2+
IIN2-
VIN3+
VIN3-
IIN3+
IIN3-
Voltage
Reference
V
REF
Charge
Pump
Circuitry
3 V
Regulator
Reset Circuit
Control Switches
Crystal
4.096 MHz
+5 VINVA+
VA-
VD+GND
XIN
Serial-to-
Parallel
Interface
DB25
To PC
(Not Populated)
Header
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Résumé du contenu

Page 1 - CDB5451A

Preliminary Product InformationThis document contains information for a new product.Cirrus Logic reserves the right to modify this product without not

Page 2

CDB5451A10 DS458DB3IN3-IN3+VI N3-VI N3+/GAI NSEFSOSDOSCLKXI NOWRSVI N1+VI N1-IIN1+IIN1-VI N2+VI N2-IIN2+IIN2-/ RESETDo Not Popul ate+3V3. 0V+5V_ I N+5

Page 3

CDB5451ADS458DB3 11GND1234J274321J261234J25IN3-IN3+VI N3-VI N3+VI N1+VI N1-IIN1+IIN1-VI N2+VI N2-IIN2+IIN2-TP68TP69TP70TP71TP64TP65TP66TP67BNC_RAJ9R25

Page 4

CDB5451A12 DS458DB3SDOSCLKFSOSE/GAI N/RESETOWRSGNDSW_B3W_1100S1R35 10KR34 10KD+D+470R1110KR54. 7KR14R8470GNDGND.1UFC43GND1Y41Y31Y21Y11A41A31A21A1VCC 1

Page 5

CDB5451ADS458DB3 133. SOFTWAREThe evaluation software was developed with LabWindows/CVI™, a software development packagefrom National Instruments. Th

Page 6

CDB5451A14 DS458DB33.2.2 The Start-Up WindowWhen the software first executes, the user shouldsee the Start-Up Window appear on the user’s PCmonitor.

Page 7

CDB5451ADS458DB3 153.2.3 The Conversion WindowRefer to Figure 5. After the user presses on thegreen-colored “START” button in this window, thesoftwar

Page 8

CDB5451A16 DS458DB33.2.3.1. Last Value The first column is labelled as “Last Value.” Thevalue in this box represents the value of the verylast inst

Page 9

CDB5451ADS458DB3 173.2.4.2. Time Domain / FFT / Histogram SelectorThis selector button is located just to the right of theCollect Button. The label

Page 10

CDB5451A18 DS458DB33.2.5.4. Histogram Bin WidthThis box allows for a variable “bin width” when plot-ting histograms of the collected data. Each vert

Page 11

CDB5451ADS458DB3 193.2.8 Frequency Domain InformationThe following section describes the indicators as-sociated with Fast Fourier Transform (FFT) ana

Page 12

CDB5451A2 DS458DB3TABLE OF CONTENTS 1. INTRODUCTION...

Page 13

CDB5451A20 DS458DB3Figure 8. Silkscreen

Page 14

CDB5451ADS458DB3 21Figure 9. Circuit Side

Page 15

CDB5451A22 DS458DB3Figure 10. Solder Side

Page 16

CDB5451ADS458DB3 23

Page 17

CDB5451A24 DS458DB3 Contacting Cirrus Logic Support For all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the

Page 18

CDB5451ADS458DB3 31. INTRODUCTIONThe CDB5451A Evaluation Board demonstratesthe performance of the CS5451A 6-channel A/Dconverter.The CDB5451A evaluat

Page 19

CDB5451A4 DS458DB32. HARDWARE2.1 Evaluation Board DescriptionThe CDB5451A board contains circuitry that will:• Accept appropriate DC voltage levels

Page 20

CDB5451ADS458DB3 5+5V. This voltage is defined as the voltage pre-sented across VD+ and DGND.2.2.3 Charge Pump OptionsThe output from CS5451A’s char

Page 21

CDB5451A6 DS458DB3Name Function Description Default Setting Default JumpersHDR1Used to switch IIN3+ on the CS5451A between J2 and AGND.IIN3+ Set to BN

Page 22

CDB5451ADS458DB3 7differential signal. Using voltage channel #1 as anexample (see Figure 2), note that HDR10 sets theinput to the positive side of the

Page 23

CDB5451A8 DS458DB3FOUT,” the CS5451A’s on-chip reference provides1.2 volts. With HDR14 set to position “LT1004,” theLT1004 provides 1.23 volts (the LT

Page 24

CDB5451ADS458DB3 92.3.7.2. AcquisitionReferring to Figure 3, the CS5451A’s SCLK line isused to clock the 8-bit serial-in/parallel-out shift-register

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