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Simply AVR Applications

Advanced Glucose Meter

Key Design Considerations

  • Ultra-Low System Power Consumption
  • High System Integration for Low Cost and Small Footprint
  • High Connectivity

Why Atmel?

  • The Atmel® AVR® XMEGA® ATXmega256A3BU microcontroller (MCU) offers ultra-low power consumption, high integration, compact package and connectivity features to address the needs of a glucose meter.
  • Ultra-Low-Power
    • The ATXmega256A3BU supports 1.62 to 3.6V and has five flexible Sleep modes
    • In Power Save mode (RTC running), the current consumption is below 1µA
    • In Active mode, the current consumption is 350µA/MHz at 1.8V
    • The DMA controller handles data transfer between peripherals and memory
  • Connectivity
    • Full Speed USB device port with embedded PHY saves BOM cost (~$0.5-$1.0). Can be used for battery charging and data transfer to a PC
  • High Integration
    • Integrated UART, USART, SPI and I2C allow easy connection to external sensors, memories and display
    • Minimum external hardware thanks to integrated RTC, high-performance ADC and DAC, PLL (phase-lock loop), and voltage reference
 

Energy Harvesting RF Sensor Nodes

Key Design Considerations

  • Ultra-low Power and Low Operating Voltage
  • High-Precision Analog Peripherals
  • Hardware System Components
    • AVR XMEGA D or E Series device
    • Atmel AT86RF231/232/233 RF transceiver
    • Atmel AT30TSE Serial EEPROM with temperature sensor

Why Atmel?

  • AVR® XMEGA® D/E Series and AT86RF23x Series devices offer low power consumption and true 1.62V operation, addressing the key design requirements for energy-harvesting RF sensor nodes
  • AVR XMEGA D/E Series
    • True 1.62V-3.6V operation: 5 Sleep modes with fast wake-up time
    • <1µA in Power Save mode (RTC)
    • 190µA/MHz at 1.8V in Active mode
    • Event System and Peripheral DMA Controller further offload CPU, achieving even lower power consumption and low latency
    • Integrated with a 12-bit ADC and 12-bit DAC for accurate sensor reading
  • Atmel AT86RF23x Series
    • Sleep current consumption less than 20nA; current consumption as low as 6.0mA Rx and 13.8mA Tx
    • Supported by the complete line of Atmel IEEE 802.15.4-compliant protocols for low-power applications: IPv6/6LoWPAN, ZigBee®, 802.15.4 MAC, and light-weight mesh network stack
 

LED Power Management

Key Design Considerations

  • High Integration and Small Form Factor
  • Support for a variety of Standard Lighting Communication Protocols
  • Energy Efficiency
  • High-temperature Operation

Why Atmel?

  • The AVR XMEGA E device is highly integrated and can support multiple LED driver topologies while leaving CPU resources for additional application functionalities
  • High Integration and Small Form Factor
    • Dual high-speed 40ns analog comparators for current regulation
    • Multiple high-speed 128MHz timers allow generation of fast PWM
    • Dual digital-to-analog converters for peak current management
    • Asynchronous Event System for ultra-fast response and control loops
    • Custom Logic (XCL) block removes external logic components
  • Energy Efficiency
    • Rich analog peripheral features mean AVR XMEGA E devices can run complicated power control algorithms (e.g., PFC) to achieve high power efficiency
    • Ultra-low power consumption as low as 100µA/MHz in active mode and 100nA in RTC/RAM retention
  • Qualified for High-temperature Use at 105°C and 125°C
  • Support for Multiple Lighting Communication Protocols
  • Hardware DALI (Digital Addressable Lighting Interface) Support via XCL (XMEGA Custom Logic) Block in AVR XMEGA E Devices
 

3-phase Permanent Magnet Synchronous Motor Sensorless FOC for Appliances

Key Design Considerations

  • Power Efficient and Acoustically Quiet Motor Operation (standards compliance)
  • Low BOM Cost and Compact Design to Enable FOC (Field Oriented Control) Use in Low- and Mid-tier Appliance Designs

Why Atmel?

  • The AVR XMEGA ATxmega8E5 device with the AVR1636 Reference Design offers features, high integration and application support to allow FOC implementation for power efficient and acoustically quiet motor control
  • Integrated Peripherals to Support FOC
    • Three 16-bit timer/counters with up to four output compare or input capture channels
    • High-resolution extension and Advanced Waveform eXtension (AWeX)
    • Eight-channel Event System allows peripherals to directly send, receive, and react to synchronous or asynchronous events in a short and guaranteed response time
    • Scalability on any of the code-compatible devices in the AVR XMEGA product line
  • Low BOM Cost and Compact Design
    • Feature-rich 300kSPS 12-bit ADC with programmable-gain amplifier up to 64x – with temperature, supply voltage and reference inputs
    • EEPROM for configuration parameter storage
    • Two USART, one SPI, one I2C Serial Interfaces for system communication
  • Application Support
    • AVR1636 reference design hardware, firmware and PC configuration utility
      • Less than 7KB of code
    • AVR1610 pre-certified Class B library and design guide