DA14531 – Ultra-Low-Power SoC

Overview

The DA14531 is an ultra-low-power SoC integrating a 2.4 GHz transceiver and an Arm Cortex-M0+ microcontroller with 48 kB RAM and 32 kB OTP memory. It can function as a standalone application processor or a data pump in hosted systems. Fully compliant with Bluetooth Low Energy 5.1, it includes a certified BLE protocol stack, supporting L2CAP, SM, ATT, GATT, GAP, and standard/custom profiles. Ideal for disposable products, wireless sensor nodes, beacons, proximity tags, trackers, smart HIDs (stylus, keyboard, mouse, trackpad), toys, medical, and industrial applications.

Key Advantages

• Lowest power consumption

• Minimal system size

• Lowest system cost

Key Features

Compatibility:

• Bluetooth v5.1, ETSI EN 300 328/440, FCC CFR47 Part 15, ARIB STD-T66

• Supports up to 3 BLE connections

• 35 ms cold start to radio activation

Processing:

• 16 MHz 32-bit Arm Cortex-M0+ with SWD

• EEMBC IoTMark-BLE score: 18,300

• Dedicated link layer processor, AES-128, software-based TRNG

Memory:

• 32 kB OTP, 48 kB RAM, 144 kB ROM

Power Management:

• Integrated Buck/Boost DC-DC converter (Buck: 1.1–3.3 V, Boost: 1.1–1.65 V)

• Sleep mode: 270 nA (Buck), 240 nA (Boost)

• Built-in temperature sensor

Clocks:

• 32 MHz crystal/RC oscillator, 32/512 kHz RC oscillator, 15 kHz RCX

• Programmable reset circuit, general-purpose timers

Digital Interfaces:

• 6 (WLCSP17) or 12 (FCGQFN24) GPIOs

• 2 UARTs (one with flow control), SPI (up to 32 MHz), I²C (100/400 kHz), 3-axis quadrature decoder, keyboard controller

Analog Interfaces:

• 4-channel 10-bit ADC

Wireless Transceiver:

• 2.4 GHz CMOS transceiver, single-wire antenna

• TX: 3.5 mA, RX: 2.2 mA (DC-DC on, 3 V, 0 dBm)

• Programmable output: -19.5 to +2.5 dBm, sensitivity: -94 dBm

Packaging:

• WLCSP17 (1.7×2.05 mm, 0.5 mm pitch)

• FCGQFN24 (2.2×3.0 mm, 0.4 mm pitch)

Applications

• Medical devices, disposable products, beacons, proximity tags/trackers

• Wireless sensor nodes (fitness/health trackers)

• Smart watches, HIDs (stylus, keyboard, mouse, trackpad), toys, industrial appliances

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