a CONTROLLING A REMOTE ACTUATOR USING A 4-20mA LOOP CONTROL ROOM - PowerPoint PPT Presentation

PRACTICAL DESIGN TECHNIQUES FOR SENSOR SIGNAL CONDITIONING 1 Introduction 2 Bridge Circuits 3 Amplifiers for Signal Conditioning 4 Strain, Force, Pressure, and Flow Measurements 5 High Impedance Sensors 6 Position and Motion Sensors 7 Temperature Sensors 8 ADCs for Signal Conditioning I 9 Smart Sensors 10 Hardware Design Techniques 9.0 a

CONTROLLING A REMOTE ACTUATOR USING A 4-20mA LOOP CONTROL ROOM LOOP 12V TO 32V SUPPLY 4-20mA REGULATOR OUTPUT R SENSE AD420 ACTUATOR 4-20mA HOST µC DAC COMPUTER LOOP RETURN 9.1 a

4-20mA LOOP POWERED SMART SENSOR AD7714/AD7715 LOOP CONTROL ROOM DMOS FET POWER 3.3V / 5V LOOP REGULATOR SUPPLY AD421 SENSOR 4-20mA ADC µC DAC 4-20mA R SENSE RETURN HOST ADC µC COMPUTER R SENSE I COMMON I AD421 < 0.75mA I AD7714/AD7715 < 0.50mA I µC+SENSOR < 2.75mA I COMMON < 4.00mA DMOS FET: Supertex DN2535 Siliconix ND2020L or ND2410L 9.2 a

HART INTELLIGENT REMOTE TRANSMITTER USING AD421 LOOP-POWERED 4-20mA DAC LOOP POWER SENSOR 4-20mA ADC µC DAC AD421 LOOP RETURN C C WAVEFORM BANDPASS HART SHAPER FILTER MODEM BELL 202 HT20C12 / 20C15 (Symbios Logic) HART DIGITAL SIGNAL: 1200Hz, 2200Hz FREQUENCY SHIFT KEYING (FSK) 9.3 a

INDUSTRIAL NETWORKING FIELD NETWORK BRANCH NODE NODE SMART SENSOR SMART SENSOR DEVICE NETWORK NODE SMART SENSOR NODE SMART SENSOR 9.4 a

SOME OF THE STANDARDS I Ethernet I CAN-Bus I Foundation Fieldbus I Device-Net I Lonwork I WorldFIP I Profibus I P-NET I Interbus-S I HART I Universal Serial Bus (USB) I ASI 9.5 a

THE IEEE 1451.2 SENSOR INTERFACE STANDARD NCAP FIELD NETWORK - OR - DEVICE NETWORK I NCAP TII = Network Capable Application Processor TEDS I TII = Transducer Independent Interface STIM I TEDS = Transducer Electronic Datasheet Sensor or Actuator I STIM = Smart Transducer Interface Module 9.6 a

TRUE "PLUG AND PLAY" Ethernet Field Network Lonwork Field Network Ethernet Ethernet Lonwork Lonwork NCAP NCAP NCAP NCAP Flow Rate STIM Pressure STIM Temperature STIM PC with Web Browser 9.7 a

THE SMART SENSOR Pressure Sensor, RTD, Thermocouple, Strain Gage, etc. Precision Amplifier High Resolution ADC Microcontroller Sensor 9.8 a

THE EVEN SMARTER SENSOR Pressure Sensor, RTD, Thermocouple, Strain Gage, etc. MicroConverter TM ! Sensor 9.9 a

THE MicroConverter™ High Performance Analog I/O 1 + 2 On-Chip FLASH Memory + 3 On-Chip Microcontroller = MicroConverter ™ 9.10 a

ANALOG I/O 1 ADuC816 ADuC812 ADuC810 I Dual Σ∆ Σ∆ ADC I 8 chan SAR ADC I 8 chan SAR ADC N >16 bit N 12 bit, 5µs N 10 bit N >100dB SNR (p-p) N < ½ LSB INL N < ½ LSB INL N Differential Inputs N DMA mode N Prog. Gain Amp N Self-Calibration N Self-Calibration I 12bit V-Out DAC I Dual 12bit V-Out DAC I 12bit V-Out DAC N < ½ LSB DNL N < ½ LSB DNL N < ½ LSB DNL I Voltage Reference I Voltage Reference I Voltage Reference I Temperature Sensor I Temperature Sensor I Temperature Sensor 9.11 a

ON-CHIP FLASH MEMORY 2 ADuC816 ; ADuC812 ; ADuC810 I 8K bytes Nonvolatile FLASH Program Memory N Stores Program and Fixed Lookup Tables N In-Circuit Serial Programmable or External Parallel Programmable N Read-Only to Microprocessor Core I 640 bytes Nonvolatile FLASH Data Memory N User “Scratch Pad” for Storing Data During Program Execution N Simple Read / Write Access Through SFR Space I Programming Voltage (V PP ) Generated On-Chip 9.12 a

ON-CHIP MICROCONTROLLER 3 ADuC816 ; ADuC812 ; ADuC810 I Industry Standard 8052 Core N 12 Clock Machine Cycle w/ up to 16MHz Clock N 32 Digital I/O Pins N Three 16bit Counter/Timers N Universal Asynchronous Receiver/Transmitter (UART) Serial Port I ...Plus Some Useful Extras N SPI or I2C Compatible Serial Interface N WatchDog Timer N Power Supply Monitor N Timer Interval Counter (ADuC816/810) 9.13 a

ADuC816 FUNCTIONAL BLOCK DIAGRAM P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 43 44 45 46 49 50 51 52 10 11 12 28 29 30 31 36 37 38 39 16 17 18 19 22 23 24 25 2 4 1 3 9 (primary channel) AIN1 9 ADC 10 AIN AIN2 control ADuC816 Σ∆ ADC Σ∆ buf pga and MUX calibration (auxilliary channel) AIN3 11 DAC ADC DAC1 buf DAC 10 12 AIN4 AIN control control Σ∆ ADC Σ∆ buf MUX and calibration 256 x 8 22 8K x 8 T0 TEMP 2.5V user RAM 16 bit program bandgap 23 sensor T1 counter reference FLASH 1 T2 –3.5mV/°C timers watchdog EEPROM 2 V REF IN+ T2EX timer 8052 8 V REF micro- V REF IN– 640 x 8 7 detect controller power supply timer user FLASH core monitor interval 18 INT0 counter synchronous asynchronous 19 INT1 I EXC 1 serial interface 3 serial port OSC & (SPI or I2C) I EXC 2 (UART) 4 PLL 20 34 47 21 35 48 26 27 14 13 42 41 40 15 16 17 32 33 5 6 SDATA/ AV DD SCLK AGND RESET RxD TxD MISO ALE PSEN SS EA XTAL2 XTAL1 MOSI DGND DV DD 9.14 a

ADuC816 - PRIMARY SPECIFICATIONS I ADC : INL - ± 30ppm SNR (p-p) - >102dB (17 Noise Free Bits) Input Range - ± 20mV to ± 2.56V Conv. Rate - 5.4Hz to 105Hz I DAC : DNL - ± ½LSB Output Range - 0 to V REF -or- 0 to V DD Settling Time - <4µs I Power : Specified for 3V or 5V Operation 5V 3V Normal 7mA 3mA Idle 4.5mA 1.5mA Powerdown <20µA <20µA 9.15 a

ADuC812 FUNCTIONAL BLOCK DIAGRAM P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 43 44 45 46 49 50 51 52 11 12 13 14 28 29 30 31 36 37 38 39 16 17 18 19 22 23 24 25 2 4 1 3 hardware 23 CONVST ADuC812 ADC0 1 ADC DAC0 buf ADC1 2 9 DAC0 control 12-bit ADC T/H DAC ADC2 3 and control calibration ADC3 4 AIN ADC4 11 MUX DAC1 buf 10 DAC1 ADC5 12 ADC6 13 ADC7 14 256 x 8 8K x 8 22 T0 user RAM 16 bit program 23 T1 counter TEMP FLASH –3.5mV/°C 1 timers T2 watchdog sensor EEPROM timer 2 T2EX 8052 2.5V micro- 640 x 8 bandgap controller power supply user FLASH reference core monitor 18 INT0 synchronous V REF 19 asynchronous 8 INT1 buf serial interface serial port (SPI or I2C) OSC (UART) C REF 7 16 20 34 47 21 35 48 26 27 19 12 42 41 40 15 17 32 33 5 6 XTAL1 XTAL2 AV DD AGND SCLK ALE PSEN RxD SDATA/ RESET MISO TxD SS EA DGND MOSI DV DD 9.16 a

ADuC812 - PRIMARY SPECIFICATIONS I ADC : INL - ± ½LSB SNR (p-p) - >70dB Input Range - 0 to V REF Conv. Time - <5µs (200kSPS) I DAC : DNL - ± ½LSB Output Range - 0 to V REF -or- 0 to V DD Settling Time - <4µs I Power : Specified for 3V or 5V Operation 5V 3V Normal 18mA 12mA Idle 10mA 6mA Powerdown <50µA <50µA 9.17 a

MicroConverter™ DESIGN SUPPORT MicroConverter TM Web Site 1 QuickStart TM Development Kit 2 Third Party Development Tools 3 9.18 a

MicroConverter™ WEB SITE 1 www.analog.com I Data Sheets I Application Notes I 8051 Reference Material I Free Windows MicroConverter TM Simulator I Free Keil ‘C’ Compiler (2K limited version) 9.19 a

MicroConverter™ - QuickStart™ DEVELOPMENT KIT 2 I Documentation QuickStart TM N User’s Guide N Datasheet N Tools Tutorial N Quick Reference Guide I Software I Evaluation Board N Metalink Assembler N RS-232 Serial Comms N ‘C’ Compiler (Limited 2K) N 32K External SRAM N Windows Simulator N Buffered Analog I/O N Serial Downloader I Regulated Power Supply N Windows Debugger I Serial Port Cable N Example Code 9.20 a

MicroConverter™ - THIRD PARTY DEVELOPMENT TOOLS 3 The First Two of Many Third Power Tools Party Tools to Fully Support MicroConverter TM Products: I Keil Compiler N A full function windows based ‘C’ compiler environment featuring a simulator for source and assembly level debugging. I MetaLink Emulator N A high end in circuit emulation system offering a complete windows based environment for in-system debug sessions. All tools will fully integrate with each MicroConverter product 9.21 a

MicroConverter™ PRODUCT ROADMAP TIME 1 2 3 ADuC812 ADuC816 ADuC810 . . . . - - - 8 Channel Dual 16 bit + Low Cost Σ∆ Σ∆ ADC 12 bit ADC - - - 10 bit ADC, Dual DAC Single DAC Dual DAC I Larger FLASH Memory Capacity (Data and Program) I Hardware Communications . . . . Future Products May Include: Interface Enhancements (CAN Bus, USB Bus) I Increased Microcontroller Horsepower 9.22 a