Apollo3 Blue Plus

Intelligence Everywhere

Now with more memory and security than ever in the Apollo3 product family, Apollo3 Blue Plus enables the future of AI in connected living and industry.

Bridging AI, Connectivity, and Exceptional Living


Unlock Innovation

Apollo3 Blue Plus offers abundant application processing power and memory, as well as extended battery life for next-generation devices.


Be Heard

Keyword detection for voice assistance is made easy on Ambiq’s proprietary Voice-on-SPOT®.


Create Everywhere

A rich set of power modes and peripherals enable a wide variety of uses across vastly different applications to benefit from the SPOT advantage.


Design Securely

Ambiq’s secureSPOT® platform offers secure OTA and wired updates, Flash protection, recovery, hardware entropy, secure boot, and more for secure applications.

Apollo3 Blue Plus Block Diagram


Ultra-Low Supply Current

  • 6 μA/MHz executing from flash or RAM at 3.3 V
  • 1 μA deep sleep mode (Bluetooth Low Energy Off) with RTC at 3.3 V (Bluetooth Low Energy in SD)

High-Performance Arm Cortex-M4 Processor

  • Up to 48 MHz nominal clock frequency with 96 MHz performance TurboSPOT Mode
  • Floating Point Unit (FPU)
  • Memory Protection Unit (MPU)
  • Wake-up interrupt controller (WIC) with 32 interrupts

Integrated Bluetooth Low Energy Module

  • RF sensitivity: -93 dBm (typical)

Ultra-Low Power Memory

  • Up to 2MB of flash memory for code/data
  • Up to 768KB of low power RAM for code/data
  • 16KB 2-way Associative/Direct-Mapped Cache

Ultra-Low Power Interface for On- and Off-Chip Sensors

  • 14-bit ADC, 14 selectable input channels available
  • Up to 2.67 MS/s sampling rate
  • Voltage Comparator (VCOMP)
  • Temperature sensor with ±3°C accuracy after calibration

Ultra-Low Power Flexible Serial Peripherals

  • ISO7816 Secure interface
  • 1x 2/4/8-bit and 2x 2/4-bit SPI master interface (MSPIs)
  • 6x I2C/SPI masters for peripheral communication
  • 1x I2C/SPI slave for host communications
  • 2x UART modules with 32-location Tx and Rx FIFOs
  • PDM for mono and stereo audio microphones
  • 1x 12S slave for PDM audio pass-through

Rich Set of Clock Sources

  • 32.768 kHz Crystal (XTAL) oscillator
  • Low Frequency RC (LFRC) oscillator (1.024 kHz)
  • High Frequency RC (HFRC) oscillator (48/96 MHz)
  • RTC based on Ambiq’s AM08X5/18X5 family

Wide Operating Range

  • 1.755-3.63 V, -40°C to 85°C


  • Voice-on-SPOT compatible for always-listening keyword detect, audio command recognition and voice assistant integration in battery-powered devices including:
    - Bluetooth® headsets, earbuds, and truly wireless earbuds
    - Remote and Gaming Controls
    - Smart home
  • Wearables including smart watches and fitness/activity trackers
  • Hearing aids, Digital Health Monitoring and Sensing Devices
  • Smart Home Automation, Security and Lighting control applications

Package Option

  • 5.3 mm x 4.3 mm x 0.8 mm, 108-pin BGA with 74 GPIO

Ordering Information

  • AMA3B2KK-KBR (768KB RAM, 108-pin BGA)

Design Resources

Download resources including Product Briefs, Selector Guides, White Paper, Case Studies, Analyst Reports, and more

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