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ADUCM360:  Low Power Precision Analog Microcontroller, ARM Cortex M3 with Dual Sigma-Delta ADCs

Product Details

Product Status:Recommended for New Designs

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

FEATURES and BENEFITS

  • Analog Input/Output
    -- Dual 24-bit ADCs (ADuCM360)
    -- Single 24-bit ADC (ADuCM361)
    -- Programmable ADC output rate (3.5 Hz to 3.906 kHz)
    -- See data sheet for additional features
  • Flexible input mux for input channel selection to both ADCs
  • Microcontroller
    -- ARM Cortex™-M3 32-bit processor
    -- Serial wire download and debug
    -- Internal watch crystal for wake-up timer
    -- 16 MHz Oscillator with 8-way Programmable Divider
  • Memory
    -- 128k Bytes Flash/EE Memory, 8kB SRAM
    -- In-circuit debug/download via serial wire and UART
  • Power Consumption, MCU active mode
    -- Core consumes 290 μA/MHz
    -- Overall system current consumption of 1.0 mA with core operating at 500 kHz (both ADCs on, input buffers off, PGA gain of 4, one SPI port on, and all timers on)
  • Power consumption, power down mode: 4μA (wake-up timer active)
  • On-Chip Peripherals
    -- UART, I2C and 2 x SPI Serial I/O
    -- 16-bit PWM Controller
    -- 19-Pin Multi-Function GPIO Port
    -- See data sheet for additional features
  • Package and Temperature Range
    -- 48 lead, 7mm x 7mm LFCSP
    -- Specified for –40°C to 125°C operation
  • Development Tools
    -- Low-Cost QuickStart Development System
    -- Third-Party Compiler and emulator tool Support
  • Multiple Functional Safety features for improved diagnostics
  • See data sheet for additional features

Functional Block Diagram for ADuCM360

Similar Products

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The ADUCM361 is a 24-bit Low Power, Precision Analog Microcontroller, ARM Cortex M3 with Single Sigma-Delta ADC
The ADUC7060 is a 24-bit Low Power, Precision Analog Microcontroller, Dual Sigma-Delta ADC, Flash/EE, ARM7TDMI, in 48-lead LFCSP and 48-lead LQFP
The ADUC7061 is a 24-bit Low Power, Precision Analog Microcontroller, Dual Sigma-Delta ADC, Flash/EE, ARM7TDMI, in 32-lead LFCSP
The ADUC845 is a 10 channel, 24-bit Precision Analog Microcontroller, 12MIPS 8052 Flash MCU, in 56-lead LFCSP and 52-lead MQFP
The ADUC847 is a 10 channel, 24-bit/16-bit Precision Analog Microcontroller, 12MIPS 8052 Flash MCU, in 56-lead LFCSP and 52-lead MQFP
The ADUC848 is a 10 channel, 24-bit/16-bit Precision Analog Microcontroller, 12MIPS 8052 Flash MCU, in 56-lead LFCSP and 52-lead MQFP

Demo circuit for 4- 20-mA HART Enabled Field Instruments

Documentation

Title Content Type File Type
ADuCM360/ADuCM361: Low Power, Precision Analog Microcontroller with Dual Sigma-Delta ADCs, ARM Cortex-M3 Data Sheet (Rev B, 07/2013) (pdf, 418 kB) Data Sheets PDF
AN-1250: Interfacing an ADT7310/ADT7410 to a Cortex-M3 Based Precision Analog Microcontroller (ADuCM360)  (pdf, 265 kB) Application Notes PDF
AN-1111: Options for Minimizing Power Consumption When Using the ADuCM360/ADuCM361  (pdf, 244 kB) Application Notes PDF
AN-1160: Cortex-M3 Based ADuCxxx Serial Download Protocol  (pdf, 144 kB) Application Notes PDF
AN-1159: I2C-Compatible Interface on Cortex-M3 Based Precision Analog Microcontroller (ADuCxxx Family)  (pdf, 227 kB) Application Notes PDF
CN0319: 14-Bit, 4-20 mA, Loop Powered, Ther mocouple Temperature Measurement System Using ARM Cortex-M3  (pdf, 343 kB) Circuit Note PDF
CN-0221: USB-Based Temperature Monitor Using the ADuCM360 Precision Analog Microcontroller and an External Thermocouple  (pdf, 366 kB) Circuit Note PDF
CN-0300: 12-Bit, 4-20mA Loop-Powered Thermocouple Measurement System Using ARM Cortex-M3  (pdf, 379 kB) Circuit Note PDF
Complete 4 mA to 20 mA Loop Powered Field Instrument with HART Interface  (pdf, 259 kB) Circuit Note PDF
ADI Elves Software Tool and the ADuCM360 Microcontroller Getting Started Video Videos HTML
UG-367: Using the ADuCM360/ADuCM361 Low Power, Precision Analog Microcontroller with Dual Sigma-Delta ADCs, ARM Cortex-M3  (pdf, 1642 kB) User Guides PDF
UG-457: ADuCM360 Development Systems Getting Started Tutorial  (pdf, 995 kB) User Guides PDF
MS-2634: Smart Integration  (pdf, 1699 kB) Technical Articles PDF
Home is Where the Heart Is (positioning paper)  (pdf, 577 kB) Technical Articles PDF
Signal Chain Solution for 4-mA to 20-mA HART Enabled Field Instrument Applications (26 Mar 2013) Press Releases HTML
Analog Devices’ Analog Microcontroller with ARM Cortex M3 and Dual 24-Bit Sigma-delta A/D Converters Offers Highest Accuracy, Lowest Power (04 Jun 2012) Press Releases HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Sigma-Delta ADC Tutorial
An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.
Utilities and Conversions HTML
Development Tools Software Configurable Products HTML
ADuCM360/361 Power Calculator  (xlsx, 41 kB) Design Calculators XLSX
ADuCM360/ADuCM361 Digital Filter Response Model  (xlsx, 509 kB) Design Tool XLSX
ADuCM360/361 code examples and function libraries  (zip, 1143 kB) Code Examples ZIP

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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Companion Products

Suggested Companion Products


Recommended Low Power Hart Modem for the ADuCM360
  • For a Hart-compliant fully integrated FSK modem, we recommend the AD5700 or the AD5700-1.
Recommended Hart Modem Output DAC's for the ADuCM360
  • 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 and the AD5422.
Recommended Digital Isolator for the ADuCM360 Recommended RS-232 Transceiver for the ADuCM360
  • For a standard UART to RS-232 interface, we recommend the ADM3202.
Recommended Digital Temperature Sensor for the ADuCM360
  • For high accuracy, low power, wide temperature range, we recommend the ADT7410.
Recommended Linear Regulator for the ADuCM360
  • For high output current, low dropout voltage and low shutdown current, we recommed the ADP1720.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

ADUCM360 Model Options
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.

ADUCM360/361 DEVELOPMENT SYSTEM
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADUCM360QSPZ Status: Production Evaluation Board $119.00 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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