STMicroelectronics STEVAL-IKR002V4D

Overview

STEVAL-IKR002V4D from STMicroelectronics is an SPIRIT1-based 868 MHz low-data-rate RF transceiver daughterboard for sub-GHz wireless M-Bus systems, featuring 2-FSK/GFSK/MSK/GMSK/OOK/ASK modulation, programmable air data rate (1–500 kbps), −119 dBm receiver sensitivity, and AES-128 encryption co-processor.

For engineers reviewing the STEVAL-IKR002V4D datasheet, STEVAL-IKR002V4D pinout, STEVAL-IKR002V4D application, or STEVAL-IKR002V4D equivalent, this board enables rapid prototyping of secure, ultra-low-power 868 MHz wireless sensor nodes in utility metering, industrial telemetry, and battery-powered IoT endpoints.

Technical Context

The board implements the SPIRIT1 transceiver (ST's single-chip sub-GHz RF IC) with integrated SMPS power management, crystal oscillator (32.768 kHz reference), and matching network tuned specifically for 868 MHz operation. It supports low-duty-cycle RX/TX modes and hardware-accelerated packet handling including automatic ACK/retransmission.

SPI interface (SDI/SDO/SCLK/CSn/SDn) connects directly to host microcontrollers; GPIO0–GPIO3 provide configurable digital I/O for status signaling or external event triggering. All RF paths are impedance-matched to 50 Ω with discrete balun and filtering components per ST reference layout.

Key Specifications

Availability

STEVAL-IKR002V4D is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor networks, battery-powered telemetry gateways, and wireless M-Bus endpoint development requiring stable component supply and full ST reference design validation.

Supply support for STEVAL-IKR002V4D includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, analog ICs, power devices, and RF solutions for industrial, automotive, and consumer applications.

This evaluation board belongs to ST's STEVAL (ST Evaluation) platform family, engineered to accelerate RF subsystem validation and firmware integration for sub-GHz wireless communication in regulated utility and industrial markets.

FAQ

What is the primary RF transceiver IC used on the STEVAL-IKR002V4D board?

The board integrates the SPIRIT1 (SPSGRF-868) transceiver IC - a fully integrated, low-power, sub-GHz RF SoC supporting multiple modulation schemes and operating across 150–1050 MHz bands, with factory-trimmed calibration for 868 MHz performance.

Does the STEVAL-IKR002V4D support other frequency bands besides 868 MHz?

Yes - the board's hardware supports 169 MHz, 315 MHz, 433 MHz, 868 MHz, 915 MHz, and 920 MHz bands via jumper-selectable crystal and matching network configuration; B3 position is populated for 868 MHz by default per DocID025785 Rev 1.

How is power managed on the STEVAL-IKR002V4D during low-duty-cycle operation?

It uses the SPIRIT1's internal SMPS regulators (SMPS1/SMPS2 pins) and low-power sleep modes, enabling <10 µA deep-sleep current draw while retaining register state and allowing wake-up via GPIO or timer events - critical for multi-year battery life in metering applications.

Can the STEVAL-IKR002V4D be used as a standalone node without a host microcontroller?

No - it is a daughterboard requiring connection to a host MCU via SPI; all packet processing, encryption key management, and application logic must be implemented externally - the board provides only RF physical layer and baseband framing acceleration.