EVAL-CN0209-SDPZ Analog Devices Inc, EVAL-CN0209-SDPZ Datasheet - Page 4

• Manufacturer Part Number: EVAL-CN0209-SDPZ
• Description: EVAL CIRCUIT BOARD
• Manufacturer: Analog Devices Inc
• Series: -r

Specifications of EVAL-CN0209-SDPZ

• Main Purpose: Interface, Analog Front End (AFE)
• Embedded: No
• Utilized Ic / Part: AD7193, AD8275, AD8617, AD8676, ADG1414, ADG442, ADP1720, ADT7310, ADuM1400, ADuM1401, REF194
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

CN-0209
Table 1. Measured Performance Based on 1000 Samples
Input
±10V Input Range
4 mA to 20 mA Range
RTD
Thermocouple
Figure 3 shows a histogram plot of the AD7193 output
performance when configured in bipolar input mode with the
inputs connected to ground. This histogram shows the effects of
input-referred noise. The effective resolution achieved in this
mode is 19.2 bits.
Table 1 shows the performance for other operating modes based
on 1000 data samples from the ADC.
This design also includes external protection such as standard
protection diodes and transient voltage suppressors (TVS
devices) to enhance the robustness of the circuit. Refer to the
schematics and other resources in the CN0209 Design Support
Package: http://www.analog.com/CN0209-DesignSupport.
CIRCUIT EVALUATION AND TEST
This circuit uses the EVAL-CN0209-SDPZ circuit board and
the EVAL-SDP-CB1Z System Demonstration Platform (SDP)
evaluation board. The two boards have 120-pin mating
connectors, allowing for the quick setup and evaluation of the
circuit’s performance. The EVAL-CN0209-SDPZ board
contains the circuit to be evaluated, as described in this note,
and the SDP evaluation board is used with the CN0209
evaluation software to capture the data from the
EVAL-CN0209-SDPZ circuit board.
Equipment Needed
• PC with a USB port and Windows® XP or Windows Vista®
(32-bit) or Windows® 7 (32-bit)
• EVAL-CN0209-SDPZ Circuit Evaluation Board
200
180
160
140
120
100
–0.01699 –0.01698 –0.01697 –0.01696
80
60
40
20
0
AD7193 50 Hz Data Rate, Gain = 1, Input = 4.5 V Reference
Figure 3. Noise Distribution Histogram,1000 Samples
Gain = 1; 50 Hz and 60 Hz rejection; output data rate = 2.63 Hz
AD7193 Configuration
Gain = 1; 50 Hz and 60 Hz rejection; output data rate = 50 Hz
Gain = 16; 50 Hz and 60 Hz rejection; output data rate = 2.63 Hz
Gain = 128; 50 Hz and 60 Hz rejection; output data rate = 2.63 Hz
AMPLITUDE (V)
–0.01695
–0.01694
–0.01693
Rev. 0 | Page 4 of 5
• EVAL-SDP-CB1Z SDP Evaluation Board
• CN0209 Evaluation Software
• Power supply: +15 V and –15 V
• RTD temperature sensor
• Thermocouple
Getting Started
Load the evaluation software by placing the CN0209 Evaluation
Software disc in the CD drive of the PC. Using "My Computer,"
locate the drive that contains the evaluation software disc and
open the Readme file. Follow the instructions contained in the
Readme file for installing and using the evaluation software.
Functional Block Diagram
See Figure 1 of this circuit note for the circuit block diagram,
and the file “EVAL-CN0209-SDPZ-SCH-Rev0.pdf” for the
circuit schematics. This file is contained in the CN0209 Design
Support Package: http://www.analog.com/CN0209-DesignSupport.
Setup
Connect the 120-pin connector on the EVAL-CN0209-SDPZ
circuit board to the connector marked “CON A” on the
EVAL-SDP-CB1Z evaluation (SDP) board. Nylon hardware
should be used to firmly secure the two boards, using the holes
provided at the ends of the 120-pin connectors. With power to
the supply off, connect a +15 V power supply to the pin marked
“+15 V,” a −15V power supply to the pin marked “−15 V”and
“GND” on the board. Connect the USB cable supplied with the
SDP board to the USB port on the PC. Note: Do not connect
the USB cable to the mini USB connector on the SDP board at
this time.
Test
Apply power to the ±15 V supply connected to the
EVAL-CN0209-SDPZ circuit board. Launch the evaluation
software and connect the USB cable from the PC to the USB
mini-connector on the SDP board.
Once USB communications are established, the SDP board can
now be used to send, receive, and capture serial data from the
EVAL-CN0209-SDPZ board.
Voltage Measurement
If you want to measure the noise of the voltage measurement
circuit, connect both inputs J3 and J4 to the ground. Then, click
on the button of the matching channel of the software: either
V1 (if you are using channel 1) or V2 (if you are using channel 2).
RMS Noise (nV)
7940
931
243
220
Effective Resolution (Bits)
19.15
22.24
20.29
19.23
Circuit Note