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ADUC7028:  Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI® MCU

Product Details


The ADuC7019/20/21/22/24/25/26/27/28 are fully integrated, 1 MSPS, 12-bit data acquisition systems incorporating high performance multichannel ADCs, 16-bit/32-bit MCUs, and Flash/EE memory on a single chip.

The ADC consists of up to 12 single-ended inputs. An additional four inputs are available but are multiplexed with the four DAC output pins. The four DAC outputs are only available on certain models (ADuC7020 and ADuC7026). However, in many cases where the DAC outputs are not present, these pins can still be used as additional ADC inputs, giving a maximum of 16 ADC input channels. The ADC can operate in single-ended or differential input modes. The ADC input voltage is 0 V to VREF. A low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.

Depending on the part model, up to four buffered voltage output DACs are available on-chip. The DAC output range is programmable to one of three voltage ranges.

The devices operate from an on-chip oscillator and a PLL generating an internal high frequency clock of 41.78 MHz. This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The microcontroller core is an ARM7TDMI, 16-bit/32-bit RISC machine, which offers up to 41 MIPS peak performance. Eight kilobytes of SRAM and 62 kilobytes of nonvolatile Flash/EE memory are provided on-chip. The ARM7TDMI core views all memory and registers as a single linear array.

Applications

  • Industrial control and automation systems
  • Smart sensors, precision instrumentation
  • Base station systems, optical networking

FEATURES and BENEFITS

  • Chinese data sheet available
  • Microcontroller
    ARM7TDMI core, 16-bit/32-bit RISC architecture
    JTAG port supports code download and debug
  • Clocking options
    Trimmed on-chip oscillator (±3%)
    External watch crystal
    External clock source up to 44 MHz
    41.78 MHz PLL with programmable divider
  • Memory
    62 kB flash/EE memory, 8 kB SRAM
    In-circuit download, JTAG-based debug
    Software-triggered in-circuit reprogrammability

Analog I/O

  • Multichannel, 12-bit, 1 MSPS ADC
    Up to 16 ADC channels1
  • Fully differential and single-ended modes
  • 0 V to VREF analog input range
  • 12-bit voltage output DACs
    Up to 4 DAC outputs available1
  • On-chip voltage reference
  • On-chip temperature sensor (±3°C)
  • Voltage comparator
  • Power
    Specified for 3 V operation
    Active mode: 11 mA @ 5 MHz, 40 mA @ 41.78 MHz
  • Packages and temperature range
    From 40-lead 6 mm x 6 mm LFCSP to 80-lead LQFP1
    Fully specified for –40°C to +125°C operation
  • Tools
    Low cost QuickStart™ development system
    Full third-party support

On-chip peripherals

  • UART, 2 x I2C® and SPI® serial I/O
  • Up to 40-pin GPIO port1
  • 4x general-purpose timers
  • Wake-up and watchdog timers (WDT)
  • Power supply monitor
  • 3-phase, 16-bit PWM generator1
  • Programmable logic array (PLA)
  • External memory interface, up to 512 kB1

1 Depending on part model. See Ordering Guide for more information.

Functional Block Diagram for ADuC7028

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QuickStart™ Development Tools for MicroConverter® Products
Development tools and systems for ARM7TDMI and 8052 Precision based Precision Analog Microcontrollers.

Documentation

Title Content Type File Type
ADuC70xx Series: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU Data Sheet (Rev F, 05/2013) (pdf, 1296 kB) Data Sheets PDF
AN-908: Interfacing the HD44780-Based Character LCD to an ADuC702x  (pdf, 111 kB) Application Notes PDF
AN-904: ADuC7028 Evaluation Board Reference Guide MicroConverter ADuC7028 Development System  (pdf, 674 kB) Application Notes PDF
AN-724: ADuC702x Serial Download Protocol  (pdf, 141 kB) Application Notes PDF
Using Integrated Precision Analog Microcontrollers to Simplify Data Acquisition System Design
The ins and outs (the I/O) of using Analog Microcontrollers to manage data acquisition applications
Webcasts WEBCAST
Full-Featured Pedometer Design Realized with 3-Axis Digital Accelerometer  (pdf, 598 kB)
Analog Dialogue, June 2010
Analog Dialogue PDF
Full-Featured Pedometer Design Realized with 3-Axis Digital Accelerometer  (pdf, 598 kB)
Analog Dialogue, June 2010
Technical Articles PDF
Human Fall Detection Using New MEMS Accelerometer Technology
For humans, an unobserved fall can have very serious consequences. Statistics show that the majority of serious consequences are not the direct result of falling, but rather are due to a delay in assistance and treatment. Post-fall consequences can be greatly reduced if relief personnel can be alerted in time.
(ECN, December 9, 2009)
Technical Articles HTML
Simplifying Design of Industrial Process-Control Systems with PLC Evaluation Boards (Part 1 of 2)
PLC evaluation board applications for industrial process-control systems are diverse, ranging from simple traffic control to complex electrical power grids, from environmental control systems to oil-refinery process control.
(Industrial Control DesignLine, 8/24/09)
Technical Articles HTML
Low Power, Low Cost, Wireless ECG Holter Monitor Technical Articles HTML
Impedance Measurement Blood Analysis Systems Technical Articles HTML
Integrated Route Taken to Pulse Oximetry
by Aude Richard and Brian Moss, Analog Devices, Inc. (EE Times, 12/6/2004)
Technical Articles HTML
Precision Analog Microcontroller Simplifies Optical Transceiver Design  (pdf)
by Eamon Neary and Nobuhiro Matsuzoe, Analog Devices, Inc. (Information Quarterly, Volume 3, Number 2, 2004)
Technical Articles PDF
Precision Analog Microcontrollers—ARM7® and 8051 Series  (pdf, 5834 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Development Tools Software Configurable Products HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Price, packaging, availability

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADuC7028 QuickStart Plus Development System
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADUC7028QSZ Status: Production ADuC7028 Quickstart development system $59.00 Yes -
EVAL-ADUC-CABLE1Z Status: Production UART Serial downloader cable $15.18 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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