mmWave Radar Sensor

60GHz mmWave Radar

Micro-Motion Detection Module For Detecting Human Motion And Micro-Motion

Within The Detection Range

Version Options

Features At A Glance

The A121 Range Sensor is based on 60GHz Pulsed Coherent Radar (PCR) technology, enabling human presence and motion detection, supporting high-precision distance measurements. Its detection area and sensitivity parameters are configurable, offering excellent anti-interference capability. The module integrates an Arm Cortex-M4 MCU (STM32L431CBT6), allowing it to either function as a standalone unit with user applications directly deployed on the Acconeer RSS, or communicate with external host controllers via a register command protocol.
It features compact size, low power consumption, and easy integration, suitable for applications such as human presence detection, proximity sensing, contactless triggering, and vital signs monitoring.

• A121 60GHz Pulsed Coherent Radar (PCR), integrated Baseband, RF front-end, and Antenna, supports human presence detection, micro-motion detection, and high-precision distance measurements
• Integrated Arm Cortex-M4 MCU (STM32L431CBT6), up to 80MHz frequency, with 128KB Flash and 64KB RAM, supports local radar processing
• Compact 39 × 39 (mm) dimensions with optimized antenna structure, enabling high gain and stable detection
• 3.3V IO interface power supply
• Supports UART, I2C, and GPIO interfaces, outputting radar detection results based on a register protocol
• Supports behind-plastic or behind-glass installation, enabling reliable operation without additional openings in the enclosure
• Reserved PCB and SWD pads for RSS and user application development, as well as production line programming and testing
• Operating temperature: -40°C ~ 85°C, suitable for industrial and harsh environments

Specifications

HARDWARE
FREQUENCY BAND	60GHz
MODULATION METHOD	PCR
POWER SUPPLY	5V
IO VOLTAGE	3.3V
OUTPUT INTERFACE	USB / UART / I2C
UART BAUDRATE	UART: 921.6kbps I2C: 100K / 400K
OPERATING TEMPERATURE	-40°C ~ 85°C
OUTLINE DIMENSIONS	39 × 39 (mm)
SYSTEM PERFORMANCE
DETECTION DISTANCE RESOLUTION	0.03m at 25°C, Profile1
DETECTION ANGLE	Horizontal: 53° Vertical: 65°
DETECTION ACCURACY	0.03m at Profile1
OPERATING CURRENT (MAX)	5V 80mA

Pinout Definition

Compatible With Multiple Platforms

Provides Demo And User Manual For Raspberry Pi, Raspberry Pi Pico, ESP32, And Arduino.

Easier To Develop And Integrate, And Better Expansibility

Visual Host Support

Easily Connect To Host Software For Configuration And Debugging Via A Type-C Cable

* for reference only, please refer to the package content for detailed part list.

Direction & Detection Range

Detection Range Display

Flat Cover Lens

Hyperbolic Lens

FZP (Fresnel Zone Plate) Lens

Application Scenarios

Outline Dimensions

A121 Range Sensor (Without Holder)

A121 Range Sensor Box (With Holder)

[] A121 Range Sensor

[] A121 Range Sensor Box

To：

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Email(support)

services01@spotpear.com