Apollo3 Blue is the upcoming new MCU expanding the ultra-low power Apollo microcontroller family. It manages a further reduction in power consumption compared to the so far unprecedented values of the former Apollo generations. At the heart of the Apollo3 Blue MCU is Ambiq Micro’s patented Subthreshold Power Optimized Technology (SPOT™) and a powerful ARM Cortex-M4 processor with Floating Point Unit. With its extended set of features and incorporated BLE 5, the Apollo3 Blue enables users to run sophisticated processes in hearables, wearables, IoT edge devices and voice controlled applications within an ultra-competitive power budget.
Specifications and Features

• Ultra-low supply current:
  •  6 μA/MHz executing from flash at 3.3 V
  • 6 μA/MHz executing from RAM at 3.3 V
  • 1 μA deep sleep mode (BLE Off) with RTC at 3.3 V
• High-performance ARM Cortex-M4Processor
  • 48 MHz nominal clock frequency, with 96 MHz high performance
• Burst Mode
  • Floating point unit
  • Memory protection unit
  • Wake-up interrupt controller with 32 interrupts
• Integrated Bluetooth 5 low-energy module
  • RF sensitivity: -93 dBm (typical)
  • TX: 3 mA @ 0 dBm, RX: 3 mA
  • Tx peak output power: 4.0 dBm (max)
• Ultra-low power memory:
  • Up to 1 MB of flash memory for code/data
  • Up to 384 KB of low leakage RAM for code/data
  • 16 kB 2-way Associative/Direct-Mapped Cache
• Ultra-low power interface for off-chip sensors:
  • 14 bit ADC at up to 1.2 MS/s, 15 selectable input channels available
  • Voltage Comparator
  • Temperature sensor with ±3°C accuracy
• ISO7816 Secure interface
• Flexible serial peripherals:
  • 1x 2/4/8-bit SPI master interface
  • 6x I2C/SPI masters for peripheral communication
  • I2C/SPI slave for host communications
  • 2x UART modules with 32-location Tx and Rx FIFOs
  • PDM for mono and stereo audio microphone
  • 1x I2S slave for PDM audio pass-through
• Rich set of clock sources:
  • 32.768 kHz XTAL oscillator
  • Low frequency RC oscillator – 1.024 kHz
  • High frequency RC oscillator – 48/96 MHz
  • RTC based on Ambiq’s AM08X5/18X5 families
• Wide operating range: 1.755-3.63 V, –40 to 85°C
• Compact package option:
  • 3.37 x 3.25 mm(<0.35mm thk pkg) 66-pin CSP with 37 GPIO
  • 5 x 5 mm (<0.5mm thk pkg) 81-pin BGA with 50 GPIO

Apollo3 Blue Documentation & sample software

• During beta phase documentation and sample software are only available upon request.