Intro 01 Features 02 Specifications 03 Documents 04 Buy 04

Apollo2 01

The Apollo2 SoC is an ultra-low power, highly integrated system on a chip designed for battery-powered and portable, mobile devices. At the heart of the Apollo2 SoC is Ambiq’s patented Subthreshold Power Optimized Technology (SPOT^®) and a powerful Arm^® Cortex^®-M4 processor with Floating Point Unit.

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Block Diagram for the Ultra-Low Power Apollo2 SoC

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This combination dramatically reduces energy consumption while still enabling abundant application processing power to add greater capability and extended life to battery-operated devices. With unprecedented levels of energy efficiency, the Apollo2 can deliver always-on keyword detection and voice assistant integration, local voice control, complex sensor processing, gesture recognition and activity monitoring applications within the smallest power budget.

The Apollo2 SoC is the 2^nd generation controller building upon Ambiq’s Apollo SoC product line. The Apollo2 SoC integrates up to 1MB of flash memory and 256KB of RAM to accommodate radio and sensor overhead while still leaving plenty of space for application code and algorithms. In addition to flexible serial channels for radio and sensor communication, this system on a chip also includes dual Pulse-Density Modulation (PDM) inputs for applications that require digital microphones for near and mid-field always-on keyword detection, voice assistant integration, and voice control.

Feature Highlights 02

Ideal Solution

An ideal solution for battery-powered applications requiring sensor measurement and data analysis.

ADC with Analog and Digital Outputs

Can measure analog sensor outputs using an integrated ultra-low power 14-bit ADC and digital sensor outputs using the integrated serial master ports.

Multiple Serial Protocol Support

A host processor can communicate with the Apollo2 SoC over its serial slave port using the I²C, SPI or I²S protocol.

Extended Battery Life

Enables months and years of battery life for products only achieving days or months of battery life today.

Greater Performance

Implementation of the Cortex-M4F core delivers both greater performance and much lower power than 8-bit, 16-bit, and other comparable 32-bit cores.

Uniquely Tuned ADC

ADC is uniquely tuned for minimum power with a configurable measurement mode that does not require SoC intervention.

Software Tool Suite

Supported by a complete suite of standard software development tools.

Specifications

Specifications 03

Ultra-Low Supply Current
< 10 μA/MHz executing from flash at 3.3 V
< 10 μA/MHz executing from RAM at 3.3 V
< 3 μA deep sleep mode with RTC at 3.3 V

High-Performance Arm Cortex-M4 Processor
Up to 48 MHz clock frequency
Floating Point Unit (FPU)
Memory Protection Unit (MPU)
Wake-up interrupt controller with 32 interrupts

Apollo2 BGA
AMAPH1KK-KBR

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Apollo2 WLCSP
AMAPH1KK-KCR

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Apollo2
Evaluation Board
AMAPHEVB

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Apollo2 BGA
AMAPH1KK-KBR

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Apollo2 WLCSP
AMAPH1KK-KCR

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Apollo2
Evaluation Board
AMAPHEVB

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Ultra-Low Power Memory
Up to 1MB of flash memory for code/data
Up to 256KB of low power RAM for code/data
16KB 2-way Associative 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
6x I²C/SPI masters with 128-byte bidirectional FIFO for communication with sensors, radios, and other peripherals
1x I²C/SPI slave for host communications with 256-bytes LRAM area for FIFO/host support
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
Headsets, Earphones, Wireless Earbuds
Mobile Accessories
Hearing Aids
Always-Listening, Voice-Activated Appliances
Portable Voice Assistants
Remote Controls
Smart Cards
Fingerprint Readers
Wearable electronics including smart watches
Smart meters
Wireless sensors
Activity and fitness monitors
Consumer electronics

Package Options
4.5 mm x 4.5 mm 64-pin BGA with 50 GPIO
2.5 mm x 2.5 mm 49-pin WLCSP with 34 GPIO

Ordering Information
AMAPH1KK-KBR (256KB RAM, 64-pin BGA)
AMAPH1KK-KCR (256KB RAM, 49-pin WLCSP)
AMAPHEVB (EVB)

Typical Sensor Application Circuit for the Apollo2 MCU

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Apollo2 01

Block Diagram for the Ultra-Low Power Apollo2 SoC

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Feature Highlights 02

Specifications 03

Documents 04

Necessary documents

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