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PDF CDB5471 Data sheet ( Hoja de datos )
| Número de pieza | CDB5471 | |
| Descripción | Evaluation Board and Software | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CDB5471
CDB5471 Evaluation Board and Software
Features
l Direct Shunt Sensor and Current
Transformer Interface for 3-Phase
Power
l On-Board Voltage Reference
l On-board crystal for XIN
l Digital Interface to PC
l Lab Windows/CVI™ Evaluation
Software
- “Real-Time” RMS calculation
- FFT Analysis
- Time Domain Analysis
- Noise Histogram Analysis
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.
Two terminal-block connectors serve as inputs to the
CS5471’s two analog input pairs. The CDB5471 in-
cludes an optional voltage reference source for CS5471.
A 4.096MHz crystal is provided as a source for CS5471’s
XIN pin, or an external clock source can be supplied by
the user. Digital output data from the CS5471 is trans-
ferred to the user’s IBM-compatible PC via the included
25-pin parallel port cable.
The CDB5471 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 the
instantaneous data from both channels.
ORDERING INFORMATION
CDB5471
Evaluation Board
VIN1+
VIN1-
IIN1+
IIN1-
VIN2+
VIN2-
IIN2+
IIN2-
VIN3+
VIN3-
IIN3+
IIN3-
VREF
VA- VA+
+5 VIN
GND
VD+
Charge
Pump
Circuitry
3V
Regulator
(Not Populated)
Control Switches
CPD VA-
VA+
GAIN
OWRS
RESET
FSO
SDO
CLK
SE
CS5451
XIN
VREF
IN OUT
Voltage
Reference
Header
Reset Circuit
Serial-to-
Parallel
Interface
Crystal
4.096 MHz
To PC
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2001
(All Rights Reserved)
FEB ‘01
DS480DB1
1
1 page  
CDB5471
2. HARDWARE
2.1 Evaluation Board Description
The CDB5471 board contains circuitry that will:
• Accept appropriate DC voltage levels from the
user’s +3V and/or +5V power supplies, and
direct this power to the VA+, VD+, VA- and
DGND pins of the CS5471.
• Direct the six analog input signals to the six
input pairs of the CS5471.
• Supply necessary voltage reference input for the
CS5471’s VREFIN pin.
• Supply appropriate crystal/oscillator stimulus to
the CS5471’s XIN pin.
• Direct the output driver signal from the
CS5471’s charge-pump driver pin (CPD) which
is used produce the negative power supply
source for the CS5471’s VA- pin.
• Provide a reset switch that allows the user to set
the CS5471’s RESET pin from logic “1” to logic
“0”.
• Provide two DIP switches which allow the user
to set the logic levels on the CS5471’s GAIN and
OWRS input pins.
• Detect and receive the data frame signal and dig-
ital serial output data signals from the CS5471’s
FSO and SDO pins, and send this output data
through the included parallel cable, and up to
user’s PC.
Several areas of blank proto-board space are pro-
vided so that, if desired, the user can interface their
own electronic sensor equipment onto the board.
The output from these sensors can be wired to the
two nearby analog input terminal block connectors,
which is then fed to the two analog input channels
of the CS5471. Examples of such sensors would
include voltage and current transformers, shunt re-
sistors, and resistor divider networks.
The next section of this document describes the
various sections of the board. 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. The user must supply the +3V, +5V,
GND, and sometimes -2V voltage levels needed to
power the evaluation board.
2.2.1 Analog Power Supply
Referring to Figure 1, the A+ post supplies power
to the positive analog power input pin (VA+) of the
CS5471. This post also supplies power to the
LT1004 voltage reference (D3) and the optional
+3V regulator (U5). If HDR9 is set to the “A-” set-
ting, the A- post can supply the required negative
voltage to the VA- pin of the CS5471.
Note that the evaluation board contains the foot-
prints and connectivity which allows the user to in-
stall a LM317 voltage regulator (U5), which can be
used to create +3 V from a +5 V supply. This op-
tion is useful if the user wants to interface the eval-
uation board to another board that can only operate
from a +5V supply. With HDR17 set to “+5V_IN”,
one single +5 V supply can be used to provide both
a +5V to various microcontrollers and/or other pe-
ripheral devices, as well as +3 V for the CS5471.
The included schematic diagram shows the circuit-
ry for the +5V regulator circuitry inside a box with
dashed lines. These components are not populated
when the board is shipped from the factory, but the
user can install these components if desired.
2.2.2 Digital Power Supply
The A+ post can be used to supply both the analog
power (to CS5471 VA+ pin) as well as the digital
power (to CS5471 VD+ pin). However if a sepa-
rate supply voltage is desired for the digital power
DS480DB1
5
5 Page 
CON_BANANA
+5V_IN
J21
Z4
P6KE6V8P
+5V
C42 C39
U5
LM317LZ TP40
TP77
3.0V
3 IN OUT 2
ADJ
1
C40
C41
10UF .1UF
.1UF 22UF
GND
Do Not Populate
CON_BANANA
J18
GND
C38
.33UF
TANT
GND
C20
.1UF
CON_BANANA
A+
J14 Z2
P6KE6V8P
GND
CON_BANANA
C13
47UF
+3V GND
HDR17
HDR2X2
34
12
C17
.1UF
D3
LT1004
V+
R2 10
L1
FERRITE_BEAD
R3
4.99K
TP40
TP1
2 1.2V
HDR3X2
HDR14
21
43
65
+3V
C19
3
.1UF
GND GND
GND
SCLK
SDO
FSO
SE
/GAIN
VIN3+
VIN3-
IN3+
IN3-
TP36
TP38
TP40
TP42
TP44
TP46
TP48
TP50
TP52
TP54
TP56
TP58
TP60
TP62
C37 4.7UF
TANT
TP37
TP39
TP41
TP43
TP45
TP47
TP49
TP51
TP53
TP55
TP57
TP59
TP61
TP63
U4
1
SCLK
2
SDO
3
FSO
4
SE
5
/GAIN
6
AGND
7
VREFIN
8
VREFOUT
9
VA+
10
VA-
11
VIN3+
12
VIN3-
13
IN3+
14
IN3-
VD+
DGND
CPD
XIN
/RESET
OWRS
VIN1+
VIN1-
IIN1+
IIN1-
VIN2+
VIN2-
IIN2+
IIN2-
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SSOP28_200_P65MM
TP40
TP76
C16
.1UF
GND
SCLK
SDO
FSO
SE
/GAIN
VIN3+
VIN3-
IN3+
IN3-
1
SCLK
2
SDO
3
FSO
4
SE
5
/GAIN
6
AGND
7
VREFIN
8
VREFOUT
9
VA+
10
VA-
11
VIN3+
12
VIN3-
13
IN3+
14
IN3-
U2
VD+
DGND
CPD
XIN
/RESET
OWRS
VIN1+
VIN1-
IIN1+
IIN1-
VIN2+
VIN2-
IIN2+
IIN2-
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SKT_SSOP28_ENP
EXT VREF
J16
CON_BANANA
A-
J15
TP2
TP40
TANT
4.7UF
C36
C2.1UF
D2
GND BAT85
Z1
P6KE6V8P
TANT
C15 2.2UF
47UF
C1 .1UF
C12
TP79 TP78
TP73 TP72
TP74 TP75
TP14
TP17
TP19
TP21
TP23
TP25
TP27
TP29
TP31
TP33
TP35
TP15
TP16
TP18
TP20
TP22
TP24
TP26
TP28
TP30
TP32
TP34
XIN
/RESET
OWRS
VIN1+
VIN1-
IIN1+
IIN1-
VIN2+
VIN2-
IIN2+
IIN2-
C21
10UF
HDR1X2
HDR16
12
D+
HDR18
HDR2X2
12
34
V+
C14
C22 C23
.1UF 47UF
.1UF
GND
GND
XIN
/RESET
OWRS
VIN1+
VIN1-
IIN1+
IIN1-
VIN2+
VIN2-
IIN2+
IIN2-
C11
.039UF
D1
BAT85
C18
D+ R32 10 .1UF
EXT_IN
GND
4.0960MHZ
GND
7
VCC
14
U1
8
HDR3X2
HDR15
21
43
65
GND
CON_BANANA
VD+
Z3 J20
P6KE6V8P
XIN
GND
GND
Figure 1. Power Supply, CS5471, and Oscillator
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet CDB5471.PDF ] | |
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