Analog Devices: CN0202 Reference Design for Flexible, High Accuracy, Low Drift, PLC/DCS Analog Output Module

atomar — Tue, 23 Apr 2013 03:53:34 GMT

Current Revision posted to Documents by atomar on 4/23/2013 3:53:34 AM

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Development Tools

Kit Overview

The circuit EVAL-CN0202-SDPZEVAL-CN0202-SDPZ Evaluation board provides a full function, flexible, programmable analog output solution that meets most requirements for programmable logic controller (PLC) and distributed control system (DCS) applications. The AD5662AD5662 low power (0.75 mW @ 5 V), rail-to-rail output, 16-bit nanoDAC® converter and the AD5750AD5750 industrial current/voltage output driver are well matched with respect to input and output voltage ranges, as well as reference voltage requirements.

The ADR444ADR444 low drift (3 ppm/°C maximum for B-grade ), high initial accuracy (0.04% maximum for B-grade), and low noise (1.8 μV p-p typical, 0.1 Hz to 10 Hz) provides the reference voltage for both the AD5750AD5750 and AD5662 and guarantees ultralow noise, high accuracy, and low temperature drift for the circuit. This circuit provides all the typical voltage and current output ranges with 16-bit resolution and no missing codes, 0.05% linearity, and less than 0.2% total output error.

The circuit also contains key features for industrial applications, such as on-chip output fault detection and protection (short circuit, undervoltage output, open circuit current output, and overtemperature), CRC checking to prevent packet error (PEC), and flexible power-up options, making it an ideal choice for robust industrial control systems. No external precision resistors or calibration routines are needed to maintain consistent performance in mass production, thereby making it ideal for PLC or DCS modules.

The CN0202 Circuit requires the SDP-B controller board for connection to the PC and runing the Analog Devices evaluation software. The SDP-B controller board used for data transfer from evaluation board to PC via USB interface. It does not come as part of the evaluation kit and can be ordered separately (EVAL-SDP-CB1ZEVAL-SDP-CB1Z). It can be reused with many other Analog Devices evaluation modules.

Key Applications: Electronic Test & Measurement, Programmable Logic Controllers/ Distributed Control Systems

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Developement Tools

System Demonstration Platform (EVAL-SDP-CB1ZEVAL-SDP-CB1Z)

- Blackfin Processor ADSP-BF527
- USB 2.0 Interface to PC
- JTAG header footprint
- 32MB SDRAM
- 2 x Small Footprint 120 Pin Connectors
- Configurable Peripheral Interfaces - SPI - SPORT - I2C - GPIOs - Parallel - Timers

CN-0202 Circuit Evaluation Board (EVAL-CN0202-SDPZEVAL-CN0202-SDPZ)
CN-0202 Evaluation Software
Software for controlling external test measurement equipment (not included on CD)
Agilent 34401A, 6.5 Digit Digital Multimeter
Agilent E3631A 0 V to 6 V/5 A; ±25 V/1 A Triple Output DC Power Supply
PC (Windows® 2000 or Windows XP) with USB interface
National Instruments GPIB to USB-B interface and cable

Technical Documents

Learning Center

Type	Description
User Manual	ADI: User Manual for CN0202 Flexible, High Accuracy, Low Drift, PLC/DCS Analog Output Module
Datasheet	ADI: Datasheet for AD5662: 2.7 V to 5.5 V, 250 µA, Rail-to-Rail Output 16-Bit nanoDAC in SOT-23 (Rev A)
Datasheet	ADI: Datasheet for AD5750/AD5750-1/AD5750-2: Industrial Current/Voltage Output Driver with Programmable Ranges (Rev E)
Datasheet	ADI: Datasheet for ADR440/ADR441/ADR443/ADR444/ADR445: Ultralow Noise, LDO XFET Voltage References with Current Sink and Source (Rev E)

Design Elements

Type	Description
Schematics	ADI: Schematics for EVAL-CN0202-SDPZ Evaluation Board
Layout	ADI: Layout for EVAL-CN0202-SDPZ
BOM	ADI: Bill of Material (BOM) for EVAL-CN0202-SDPZ Evaluation Board
Application Library	ADI: Application Library for BeMicro FPGA Project for CN0202 with Nios driver
Reference Design	ADI: Reference Design for CN0202 FMC-SDP Interposer and Evaluation Board / Xilinx KC705

Video

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Kit Features

Key Features for AD5662AD5662 are as below:

16-Bit monotonic DAC; 12-Bit accuracy guaranteed
Power-on-reset to zero or midscale.
10 µs settling time
Low power. Operates with 2.7 V to 5.5 V supply. Typically consumes 0.35 mW at 3 V and 0.7 mW at 5 V, making it ideal for battery-powered applications
Power-down capability. When powered down, the DAC typically consumes 50 nA at 3 V and 200 nA at 5 V

Key Features for AD5750AD5750 are as below:

Current output ranges: 4 mA to 20 mA, 0 mA to 20 mA, 0 mA to 24 mA, ±20 mA, and ±24 mA
- ±0.03% full-scale range (FSR) total unadjusted error (TUE)
- ±5 ppm/°C typical output drift
Voltage output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, and ±10 V with 20% overrange
- ±0.02% FSR TUE
- ±3 ppm/°C typical output drift
Flexible serial digital interface
On-chip output fault detection
Packet error checking (PEC)
Asynchronous CLEAR function
Flexible power-up condition to 0 V or tristate
Power supply range
- AVDD: +12 V (± 10%) to +24 V (± 10%)
- AVSS: −12 V (± 10%) to −24 V (± 10%)
Output loop compliance to AVDD − 2.75 V

Kit Contents

The Analog Devices EVAL-CN0202-SDPZEVAL-CN0202-SDPZ kit is supplied with below contents:

Evaluation Board

Tags: eval-cn0202-sdpz, ad5662, analog_devices