Analog Devices: CN0203 Reference Design for Flexible PLC/DCS Analog Output Module Using AD5750-1 and AD5660-1

atomar — Tue, 23 Apr 2013 03:55:25 GMT

Current Revision posted to Documents by atomar on 4/23/2013 3:55:25 AM

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Development Tools

Kit Overview

The Analog Devices Circuit Evaluation board EVAL-CN0203-SDPZEVAL-CN0203-SDPZ provides a full function, flexible, programmable analog output solution with only two analog components and meets most requirements for programmable logic controller (PLC) and distributed control system (DCS) applications. The AD5660-1 low power (2.8 mW at 5 V), rail-torail output, 16-bit nanoDAC, combined with the AD5750-1AD5750-1 industrial current/voltage output driver, provides all the typical current and voltage output ranges with 16-bit resolution and no missing codes, 0.05% linearity, and less than 0.1% output error.

The circuit also contains key features for industrial applications, such as on-chip output fault detection, 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 interface between the AD5660-1 DAC and the AD5750-1 AD5750-1 driver is simple and requires no external components. The output voltage range of the AD5660-1 is 0 V to 2.5 V, which matches the input range of the AD5750-1. In addition, the reference output voltage of the AD5660-1 is 1.25 V, which precisely matches the reference input requirement of the AD5750-1.

The AD5750-1AD5750-1 are single-channel, low cost, precision voltage/current output drivers with hardware- or software-programmable output ranges. The software ranges are configured via an SPI-/MICROWIRE-compatible serial interface.The analog input to the AD5750-1 is provided from a low voltage, single-supply digital-to-analog converter (DAC) and is internally conditioned to provide the desired output current/voltage range.

The AD5660 is member of the nanoDAC family of devices, is low power, single, 16-bit, buffered voltage-out DACs and are guaranteed monotonic by design. The AD5660-1 parts include an internal, 1.25 V, 5 ppm/°C reference, giving a full-scale output voltage range of 2.5 V.

The CN0203 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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Development 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-0203 Circuit Evaluation Board (EVAL-CN0203-SDPZEVAL-CN0203-SDPZ)
CN-0203 Evaluation Software
Software for controlling external test measurement equipment (not included on CD)
Agilent 34401A 6.5 Digital Multimeter or equivalent
Agilent E3631A 0 V to 6 V/5 A; ±25 V/1 A Triple Output DC Power Supply or equivalent
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 CN0203 Flexible PLC/DCS Analog Output Module Using Only Two Analog Components
Datasheet	ADI: Datasheet for AD5750/AD5750-1/AD5750-2: Industrial Current/Voltage Output Driver with Programmable Ranges (Rev E)
Datasheet	ADI: Datasheet for AD5620/AD5640/AD5660: Single, 12-/14-/16-Bit nanoDAC with 5 ppm/°C On-Chip Reference in SOT-23 (Rev F)

Design Elements

Type	Description
Schematics	ADI: Schematics for EVAL-CN0203-SDPZ Evaluation Board
Layout	ADI: Layout for EVAL-CN0203-SDPZ
BOM	ADI: Bill of Material (BOM) for EVAL-CN0203-SDPZ Evaluation Board
Reference Design	ADI: Reference Design for CN0203 FMC-SDP Interposer and Evaluation Board / Xilinx KC705 Reference Design
Application Library	ADI: Application Library for BeMicro FPGA Project for CN0203 with Nios driver
Simulation Model	ADI: IBIS Model for AD5660

Video

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Kit Features

Key Features for AD5750-1AD5750-1 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
Voltage output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, and ±10 V with 20% overrange
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

Key Features for AD5660-1 are as below:

Low power, single nanoDACs
- AD5660: 16 bits
12-bit accuracy guaranteed
On-chip, 1.25 V/2.5 V, 5 ppm/°C reference
Power-down to 480 nA @ 5 V, 200 nA @ 3 V
3V/5V single power supply
Guaranteed 16-bit monotonic by design
Power-on reset to zero/midscale
3 power-down functions
Serial interface with Schmitt-triggered inputs
Rail-to-rail operation
SYNC interrupt facility

Kit Contents

The Analog Devices EVAL-CN0203-SDPZEVAL-CN0203-SDPZ kit is supplied with below contents:

Evaluation Board

Tags: ad5750, ad5660-1, ad5750-1, cn0203, eval-cn0203-sdpz, ad5660, analog_devices