ADUCM360

Low power precision analog microcontroller, ARM cortex M3 with dual sigma-delta ADCs
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Product Details

The ADuCM360 is a fully integrated, 3.9 kSPS, 24-bit data acquisition system that incorporates dual high performance, multichannel sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), a 32-bit ARM Cortex™-M3 processor, and Flash/EE memory on a single chip. The ADuCM360 is designed for direct interfacing to external precision sensors in both wired and battery-powered applications. The ADuCM361 contains all the features of the ADuCM360 except that only one 24-bit Σ-Δ ADC (ADC1) is available.

The ADuCM360/ADuCM361 contain an on-chip 32 kHz oscillator and an internal 16 MHz high frequency oscillator. The high frequency oscillator is routed through a programmable clock divider from which the operating frequency of the processor core clock is generated. The maximum core clock speed is 16 MHz; this speed is not limited by operating voltage or temperature.

The microcontroller core is a low power ARM Cortex-M3 processor, a 32-bit RISC machine that offers up to 20 MIPS peak performance. The Cortex-M3 processor incorporates a flexible, 11-channel DMA controller that supports all wired communica-tion peripherals (SPI, UART, and I2C). Also integrated on chip are 128 kB of nonvolatile Flash/EE memory and 8 kB of SRAM.

The analog subsystem consists of dual ADCs, each connected to a flexible input mux. Both ADCs can operate in fully differential and single-ended modes. Other on-chip ADC features include dual programmable excitation current sources, diagnostic current sources, and a bias voltage generator of AVDD_REG/2 (900 mV) to set the common-mode voltage of an input channel. A low-side internal ground switch is provided to allow power-down of an external circuit (for example, a bridge circuit) between conversions.

The ADCs contain two parallel filters: a sinc3 or sinc4 filter in parallel with a sinc2 filter. The sinc3 or sinc4 filter is used for precision measurements. The sinc2 filter is used for fast measure-ments and for the detection of step changes in the input signal.

The devices contain a low noise, low drift internal band gap ref-erence, but they can be configured to accept one or two external reference sources in ratiometric measurement configurations. An option to buffer the external reference inputs is provided on chip. A single-channel buffered voltage output DAC is also provided on chip.

The ADuCM360/ADuCM361 integrate a range of on-chip peripherals, which can be configured under microcontroller software control as required in the application. The peripherals include UART, I2C, and dual SPI serial I/O communication controllers; a 19-pin GPIO port; two general-purpose timers; a wake-up timer; and a system watchdog timer. A 16-bit PWM controller with six output channels is also provided.

The ADuCM360/ADuCM361 are specifically designed to operate in battery-powered applications where low power operation is critical. The microcontroller core can be configured in a normal operating mode that consumes 290 μA/MHz (including flash/ SRAM IDD). An overall system current consumption of 1 mA can be achieved with both ADCs on (input buffers off), PGA gain of 4, one SPI port on, and all timers on.

The ADuCM360/ADuCM361 can be configured in a number of low power operating modes under direct program control, including a hibernate mode (internal wake-up timer active) that consumes only 4 μA. In hibernate mode, peripherals such as external interrupts or the internal wake-up timer can wake up the device. This mode allows the part to operate with ultralow power and still respond to asynchronous external or periodic events.

APPLICATIONS
  • Industrial automation and process control
  • Intelligent precision sensing systems
  • 4 mA to 20 mA loop-powered smart sensor systems
  • Medical devices, patient monitoring

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits

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EVAL-ADUCM360 Circuit Diagram

Product Details

The ADuCM360/ADuCM361 is a low power fully integrated, 24-bit data acquisition system incorporating dual, high performance multi-channel sigma-delta (Σ-Δ) ADCs, ARM Cortex M3® MCU, and Flash/EE memory on a single chip.

ADI provides low cost development platforms for the Cortex M3 based ADuCxxx microcontrollers.


EVAL-ADuCM360QSPZ evaluation kit can be used to fully evaluate the ADuCM361. The ADuCM360/361 are pin compatible and are identical except the ADC0 is not available on ADuCM361.


The hardware is designed for simplicity, flexibility and ease of use. This facilitates performance evaluation of the device with the minimum external components. The supplied ADI J-link OB emulator connects to the miniboard, providing supply, UART communication and debug capability.


The QuickStart Plus Kit for the ADuCM360/361 Precision Analog Microcontrollers features true non-intrusive Serial Wire emulation and an assembly & C-source debugging environment. This provides a comprehensive hardware development environment.


QuickStart Plus Kit Contents:

Hardware Contents

  • Evaluation Board
  • USB Cable
  • ADI J-Link OB emulator
Software Contents

  • Keil MDKARMevaluation version integrated software development tool
  • IAR EWARM evaluation version integrated software development tool
  • CM3WSD Serial DownloaderExample Code
  • Function Libraries
  • Get Started User Guide
  • Datasheets, Application Notes, Etc.

Note that the J-Link Lite and interface boards previously included in this development system are being replaced by a new ADI J-Link OB emulator with similar functionalities.

Software & Systems Requirements

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Tools & Simulations

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Design Tools

Reference Designs

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CN0221 Circuit Diagram

CN0221 Photo

CN0319 Circuit Diagram

CN0319 Photo

CN0267 Circuit Diagram

CN0267 Photo

CN0300 Circuit Diagram

CN0300 Photo

Product Recommendations

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ADUCM360 Companion parts

Recommended Hart Modem Output DAC's

  • For 16-bit, loop powered, 4 mA to 20 mA DAC , we recommend the AD5421 .
  • For 12-bit /16-bit, current source and voltage output DAC's , we recommend the AD5412 or the AD5422 .

Recommended Digital Isolator

Recommended Digital Temperature Sensor

  • For high accuracy, low power, wide temperature range , we recommend the ADT7410 .

Recommended Linear Regulator

  • For high output current, low dropout voltage and low shutdown current, we recommed the ADP1720. , we recommend the ADP1720 .

Recommended Low Power Hart Modem

  • For a Hart-compliant fully integrated FSK modem , we recommend the AD5700 or the AD5700-1 .

Recommended RS-232 Transceiver

  • For a standard UART to RS-232 interface , we recommend the ADM3202 .

Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

ADUCM360 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

Sample & Buy

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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.


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Evaluation Boards Pricing displayed is based on 1-piece.
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.