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ADUC7128:  Precision Analog Microcontroller ARM7TDMI® MCU with 12-Bit ADC and DDS DAC

Product Details

The ADuC7128/ADuC7129 are fully integrated, 1 MSPS, 12-bit data acquisition systems incorporating a high performance, multi-channel analog-to-digital converter (ADC), DDS with line driver, 16-/32-bit MCU, and Flash/EE memory on a single chip.

The ADC consists of up to 14 single-ended inputs. The ADC can operate in single-ended or differential input modes. The ADC input voltage is 0 to VREF. Low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.

The ADuC7128/ADuC7129 integrate a differential line driver output. This line driver transmits a sine wave whose values are calculated by an on-chip DDS or a voltage output determined by the DACDAT MMR.

The devices operate from an on-chip oscillator and 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-/32-bit reduced instruction set computer (RISC), offering up to 41 MIPS peak performance. There are 126 kB of nonvolatile Flash/EE provided on-chip, as well as 8 kB of SRAM. The ARM7TDMI core views all memory and registers as a single linear array.

On-chip factory firmware supports in-circuit serial download via the UART serial interface port, and nonintrusive emulation is also supported via the JTAG interface. These features are incorporated into a low cost QuickStart™ development system supporting this MicroConverter® family.

The parts operate from 3.0 V to 3.6 V and are specified over an industrial temperature range of −40°C to +125°C. When operating at 41.78 MHz, the power dissipation is 135 mW. The line driver output, if enabled, consumes an additional 30 mW.


Analog I/O

  • Multi-Channel, 12-bit, 1MSPS ADC
    Up to 14 analog-to-digital converter (ADC) channels
    Fully differential and single-ended modes
    0 to VREF Analog Input Range
  • 10-bit digital-to-analog converter (DAC)
    32-bit 21 MHz direct digital synthesis (DDS)
    Current-to-Voltage (I/V) Conversion
    Integrated second-order low-pass filter (LPF)
    DDS Input to DAC
    100 Ω line driver
  • On-Chip Voltage Reference
  • On-Chip Temperature Sensor (±3°C)
  • Voltage Comparator


  • ARM7TDMI Core, 16/32-bit RISC architecture
  • JTAG Port supports code download and debug
  • External Watch crystal/ Clock Source
    41.78 MHz PLL with 8 way Programmable Divider
    Optional Trimmed On-Chip Oscillator


  • 126 kB Flash/EE memory, 8 kB SRAM
  • In-Circuit Download, JTAG based Debug
  • Software triggered in-circuit re-programmability

On-Chip Peripherals

  • 2 x UART, 2 x I2C® and SPI Serial I/O
  • Up to 40-pin GPIO port
  • 5 X General Purpose Timers
  • Wake-up and watchdog timers (WDT)
  • Power Supply Monitor
  • 16-bit PWM generator
  • Quadrature Encoder
  • Programmable logic array (PLA)


  • Specified for 3V operation
  • Active Mode:
    11 mA (@ 5.22 MHz)
    45 mA (@ 41.78 MHz)

Packages and Temperature Range

  • 64-lead 9 mm × 9 mm LFCSP package, −40°C to 125°C
  • 64-lead LQFP, −40°C to +125°C
  • 80-lead LQFP, −40°C to +125°C


  • Low-Cost QuickStart Development System
  • Full Third-Party Support

Functional Block Diagram for ADuC7128


Title Content Type File Type
ADuC7128/ADuC7129: Precision Analog Microcontroller ARM7TDMI® MCU with 12-Bit ADC and DDS DAC Data Sheet (Rev 0, 05/2007) (pdf, 1801 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-765: Measuring Duration of a Short Pulse on the ADuC702x Family  (pdf, 108 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)
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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)
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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.
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Low Power, Low Cost, Wireless ECG Holter Monitor Technical Articles HTML
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by Aude Richard and Brian Moss, Analog Devices, Inc. (EE Times, 12/6/2004)
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by Eamon Neary and Nobuhiro Matsuzoe, Analog Devices, Inc. (Information Quarterly, Volume 3, Number 2, 2004)
Technical Articles PDF
Analog Devices' Precision Analog Microcontroller
(Design News, 7/17/2006)
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Precision Analog Microcontrollers—ARM7® and 8051 Series  (pdf, 5834 kB) Overview PDF
Industrial Applications Overview HTML
RAQs index Rarely Asked Questions HTML
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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.

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Price, packaging, availability

ADUC7128 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADUC7128BCPZ126 Status: Production 64 ld LFCSP (9x9mm, 4.70mm exposed pad) 64 Ind Tray, 260 $7.99 $7.03 Y  Material Info Notify Me Purchase Sample
ADUC7128BCPZ126-RL Status: Production 64 ld LFCSP (9x9mm, 4.70mm exposed pad) 64 Ind Reel, 2500 - $7.03 Y  Material Info Notify Me Purchase
ADUC7128BSTZ126 Status: Production 64 ld LQFP (10x10mm) 64 Ind Tray, 160 $8.30 $7.31 Y  Material Info PCN Purchase Sample
ADUC7128BSTZ126-RL Status: Production 64 ld LQFP (10x10mm) 64 Ind Reel, 1500 - $7.31 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.

ADuC7128 QuickStart Plus Development System
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-ADUC7128QSPZ Status: Production ADuC7128 Quickstart plus development system $159.00 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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