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ADUC7020:  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.


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


  • 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 ADuC7020


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-759: Expanding the Number of DAC Outputs on the ADuC8xx and ADuC702x Families (uC012)  (pdf, 112 kB) Application Notes PDF
AN-900: Enhancing the Performance of Pedometers Using a Single Accelerometer  (pdf, 208 kB) Application Notes PDF
AN-908: Interfacing the HD44780-Based Character LCD to an ADuC702x  (pdf, 111 kB) Application Notes PDF
AN-895: ADuC702x MicroConverter I2C-Compatible Interface  (pdf, 237 kB) Application Notes PDF
AN-840: Code Update via I2  (pdf, 387 kB) Application Notes PDF
AN-806: I2C Download Protocol for ADuC70xxBCPZxxl Models  (pdf, 116 kB) Application Notes PDF
AN-831: Implementing a Counter with the ADuC702x Family  (pdf, 83 kB) Application Notes PDF
AN-765: Measuring Duration of a Short Pulse on the ADuC702x Family  (pdf, 108 kB) Application Notes PDF
AN-798: Using the PWM to Generate Analog Output on the ADuC702x Family  (pdf, 137 kB)
The ADuC702x family integrates a 32-bit ARM7TDMI microcontroller and high precision analog blocks. Depending on the model, up to four 12-bit DACs are available. In some applications where more analog output is required, the PWM can also be used as a low resolution DAC. This application note describes how to generate an extra analog output from a PWM.
Application Notes PDF
AN-724: ADuC702x Serial Download Protocol  (pdf, 141 kB) Application Notes PDF
AN-718: ADuC7020 Evaluation Board Reference Guide MicroConverter® ADuC7020 Development System, Rev. A  (pdf, 480 kB) Application Notes PDF
AN-602: Using the ADXL202 in Pedometer and Personal Navigation Applications  (pdf, 81 kB) Application Notes PDF
CN0282: USB Powered DVI/HDMI-to-VGA Converter (HDMI2VGA) with Audio Extraction  (pdf, 267 kB) Circuit Note 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
ADuC702x Analog Microcontroller Generates Programmable Digital Waveforms
(Analog Dialogue, Volume 41 February 2007)
Analog Dialogue HTML
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
"Arm"-ing Analog Microcontrollers
Analog Devices moves the 32-bit ARM7 core where 8-bit analog-enabled MCUs once tread. (ED Online, 3/29/2004)
Product Reviews HTML
Microcontroller Adds Precision Analog
(EDN, 3/29/2004)
Product Reviews HTML
Transceiver targets 4x Fibre Channel Applications
New optical transceiver chipset and reference design from Analog Devices supports both gigabit Ethernet and Fibre Channel data rates up to 4.25 Gbps (eeProductCenter, 1/20/05)
Product Reviews HTML
Stamp-Sized Single-Chip Computer Uses Flash Memory
(EDN, 3/10/2006)
Product Reviews HTML
2006 Microprocessor Directory
(EDN, August 2006)
Product Reviews HTML
Precision Analog Microcontrollers—ARM7® and 8051 Series  (pdf, 5834 kB) Overview PDF
SFP Chipset and Reference Design Simplify 4.25 Gbps Transceivers Overview HTML
Optical and High Speed Networking  (pdf, 2236 kB)
Analog Devices’ optical and high speed networking ICs solve a depth and breadth of challenges faced by today’s designers of datacom and telecom systems, optical modules, and subsystems. Analog Devices products address a wide range of networking applications from O/E/O conversion, clock recovery, and backplane transmission to monitoring and control of optical power, power management, and clock generation and distribution.
Overview PDF
Precision Analog Microcontrollers ARM7® and 8051 Series  (pdf)
ADI's two families of precision analog Flash microcontrollers address the growing need for integration, design ease, programmability, and precision analog performance demanded by industrial, instrumentation, communications, and automotive applications.
Overview PDF
ICs for Programmable Logic Control and Distributed Control Systems  (pdf, 976 kB)
Analog Devices leadership in industrial IC technology, with the development of the iCMOS™ and iPolar™ processes, has uniquely defined high voltage and low voltage integration to deliver smaller, higher performance, and more cost effective ICs for industrial systems.
Overview PDF
Converters for Motor Control  (pdf, 929 kB)
Higher performance, greater accuracy and speed, and ultralow power consumption highlight Analog Devices’ portfolio of data converters for motor control. Each delivers optimum quality signals to/from the real world and processes the data with less development time, fewer parts, and lower costs.
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
ADuC7019/ADuC702x Code Examples Code Examples 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

ADUC7020 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADUC7020BCPZ62 Status: Production 40 ld LFCSP (6x6mm w/4.1mm pad) 40 Ind Tray, 490 $7.82 $6.88 Y  Material Info PCN Purchase Sample
ADUC7020BCPZ62-RL7 Status: Production 40 ld LFCSP (6x6mm w/4.1mm pad) 40 Ind Reel, 750 $7.82 $6.88 Y  Material Info PCN Purchase
ADUC7020BCPZ62I Status: Production 40 ld LFCSP (6x6mm w/4.1mm pad) 40 Ind Tray, 490 $7.82 $6.88 Y  Material Info PCN Purchase Sample
ADUC7020BCPZ62I-RL Status: Production 40 ld LFCSP (6x6mm w/4.1mm pad) 40 Ind Reel, 2500 - $6.88 Y  Material Info PCN Purchase
ADUC7020BCPZ62IRL7 Status: Production 40 ld LFCSP (6x6mm w/4.1mm pad) 40 Ind Reel, 750 $7.82 $6.88 Y  Material Info PCN Purchase
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.

ADUC7019/20/21/22 Quick Start Development System
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-ADUC7020MKZ Status: Production ADuC7019/20/21/22 Minikit development system $25.00 Yes -
EVAL-ADUC7020QSPZ Status: Production ADuC7019/20/21/22 Quickstart Plus development system $159.00 Yes -
EVAL-ADUC7020QSZ Status: Production ADuC7019/20/21/22 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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