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    Apollo3 keyvisual bg mobile
    Apollo3 keyvisual bg desktopApollo3 Blue Thin keyvisual desktop

    Apollo3 Blue Thin

    Connected and Smart

    Apollo3 Blue Thin keyvisual mobile

    Apollo3 Blue Thin introduces Bluetooth® Low Energy to the popular Apollo3 platform for connected devices. Discover the endless possibilities of endpoint AI devices in the connected world. What sets this variant apart is its ultra-compact 3.25mm x 3.37mm, 66-pin WLCSP package with a 300µm backside coating, built on an Arm® Cortex®-M4 processor with Ambiq’s turboSPOT® acceleration — making it suited for space-constrained hearing aids, hearables, and wearable designs where board area is the limiting factor.

    Where to Buy
    Design Resources

    Tomorrow’s Connected World Made Inevitable

    Property 1Apollo 3 blue thin

    01

    Smarter Homes

    Elevate the smart home experience without forfeiting on battery life.

    02

    Healthier Lives

    Low sleep power and a rich set of peripherals enable medical devices to track health metrics all day long.

    03

    More Connected

    Ultra-low power processing meets connectivity on Apollo3 Blue Thin’s Bluetooth® Low Energy radio for edge devices.

    04

    Increasingly Personalized

    Tailor to the individual with ultra-low power turboSPOT® that inspires wearables, smart home, and industrial devices to do more.

    Block Diagram Apollo3 Blue

    Apollo3 Blue Thin diagram

    Specifications

    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 with 32 interrupts

    Integrated Bluetooth Low Energy Module

    • RF sensitivity: -93 dBm (typical)

    Ultra-Low Power Memory

    • Up to 1MB of flash memory for code/data
    • Up to 384KB 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, 15 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 SPI master interface (MSPI)
    • 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 MHz)
    • RTC based on Ambiq’s AM08X5/18X5 family

    Wide Operating Range

    • 1.755-3.63 V, -40°C to 85°C

    Applications

    • Voice-on-SPOT compatible for always-listening keyword detect, audio command recognition and voice
    • 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 Options

    • 5 mm x 5 mm, 81-pin BGA with 50 GPIO
    • 3.25 mm x 3.37 mm, 66-pin WLCSP 300um with backside coating (Thin)
    • 3.25 mm x 3.37 mm, 66-pin WLCSP with 37 GPIO
    • 8 mm x 8 mm, 64-pin QFN with 38 GPIO

    Ordering Information

    • AMA3B1KK-KBR-B0 (384KB, 81-pin BGA)
    • AMA3B1KK-KCR-B0 (384KB, 66-pin WLCSP)
    • AMA3B1KK-KCR-TB (non-Bluetooth Low Energy, 384KB, 66-pin WLCSP)
    • AMA3B1KK-KQR-B0 (384KB, 64-pin QFN)
    • AMA3BEVB (EVB)

    Where to Buy

    Apollo3 Blue Thin 96 MHz 384KB WLCSP 2
    Apollo3 Blue Thin 96 MHz 384KB WLCSP

    AMA3B1KK-KCR-TB

    Apollo3 Blue Thin
    Apollo3 Blue SoC Eval Board

    AMA3BEVB

    Apollo3 Blue Evaluation Board
    Apollo3 Blue SoC 96 MHz 384KB BGA 2
    Apollo3 Blue SoC 96 MHz 384KB BGA

    AMA3B1KK-KBR-B0

    Apollo3 Blue BGA
    Apollo3 Blue SoC 96 MHz 384KB WLCSP2
    Apollo3 Blue SoC 96 MHz 384KB WLCSP

    MA3B1KK-KCR-B0

    Apollo3 Blue WLCSP

    Design Resources

    Additional Documentation

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    Frequently Asked Questions (FAQ)

    • Apollo3 Blue Thin is Ambiq’s ultra-compact, Bluetooth Low Energy-enabled variant of the Apollo3 Blue platform, built in a miniaturized WLCSP package for space-constrained designs. 

    • The Thin variant uses the same 66-pin WLCSP package footprint (3.25mm x 3.37mm) but adds a 300µm backside coating for an ultra-thin profile, making it better suited for applications where board thickness and space are tightly constrained, such as hearing aids and compact wearables. 

    • An Arm® Cortex®-M4 processor paired with Ambiq’s turboSPOT® acceleration for ultra-low-power performance. 

    • Yes. Bluetooth® Low Energy is built in, though a non-Bluetooth variant (AMA3B1KK-KCR-TB) is also available in the same WLCSP package. 

    • A 5mm x 5mm 81-pin BGA, an 8mm x 8mm 64-pin QFN, and the signature 3.25mm x 3.37mm 66-pin WLCSP with 300µm backside coating that gives this variant its “Thin” name. 

    • Keyword detection and audio command recognition, wearables like smartwatches and fitness trackers, hearing aids and digital health monitoring, and smart home automation, security, and lighting control. 

    • Yes — the Apollo3 Blue Evaluation Board (AMA3BEVB) is shared across the Apollo3 Blue family, including the Thin variant. 

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