Silicon Labs SI7022-23-EVB

Overview

SI7022-23-EVB from Silicon Labs is an evaluation board designed to demonstrate the SI7022-A20 digital relative humidity and temperature sensor IC in a 3 mm × 3 mm QFN package, supporting I²C interface, ±1.5 %RH accuracy, and -40 °C to 125 °C operating range for environmental monitoring applications.

For engineers reviewing the SI7022-23-EVB datasheet, SI7022-23-EVB pinout, SI7022-23-EVB application, or SI7022-23-EVB equivalent, this page provides verified hardware configuration details, sensor interface behavior, on-board power regulation, and direct integration guidance with Simplicity Studio 6 for real-time RH/T data logging and calibration validation.

Technical Context

The SI7022-23-EVB implements a dedicated hardware platform for the SI7022-A20 sensor IC, featuring a regulated 3.3 V LDO supply, pull-up resistors on SDA/SCL lines, test points for VDD, GND, SDA, SCL, and RESET, and a 0.1 µF decoupling capacitor adjacent to the sensor's VDD pin to ensure stable I²C communication and low-noise analog sensing performance.

It supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C operation, includes no onboard microcontroller, and relies on external host MCU or Simplicity Studio 6 via USB-to-I²C bridge (e.g., SLWSTK6220A) for command execution, register readback, and factory calibration verification per JEDEC JESD22-A108.

Key Specifications

Availability

SI7022-23-EVB is available at Aetrix Electronics and suitable for environmental sensor validation, IoT gateway prototyping, and industrial HVAC commissioning requiring stable component supply and consistent factory-traceable calibration data.

Supply support for SI7022-23-EVB 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

Silicon Labs is a fabless semiconductor company specializing in secure, intelligent wireless and sensing solutions for IoT endpoints and infrastructure.

The SI7022-23-EVB belongs to Silicon Labs' Intelligent Sensors product line, engineered to accelerate development of certified, low-power environmental sensing nodes for smart building and industrial condition monitoring systems.

FAQ

What is the primary function of the SI7022-23-EVB?

The SI7022-23-EVB is an evaluation board that enables rapid characterization and integration of the SI7022-A20 digital humidity and temperature sensor IC. It provides direct access to all sensor pins, regulated power, and I²C signal conditioning - allowing engineers to validate sensor output, verify calibration coefficients, and develop firmware without custom PCB design. The SI7022-23-EVB does not include a microcontroller or wireless stack.

Does the SI7022-23-EVB support standalone operation without external hardware?

No, the SI7022-23-EVB requires an external I²C host controller (e.g., Silicon Labs EFM32 or EFR32 starter kit) and Simplicity Studio 6 software to communicate with the SI7022-A20 sensor IC. It lacks onboard processing, memory, or USB interface - its role is strictly as a sensor interface and signal integrity reference platform. The SI7022-23-EVB must be powered and addressed via external I²C master.

What calibration data is accessible through the SI7022-23-EVB?

The SI7022-23-EVB exposes factory-programmed calibration coefficients stored in the SI7022-A20's nonvolatile memory, including RH and temperature sensor slope/offset values, heater resistance trim, and serial number. These are readable via standard I²C register reads (e.g., 0xE0–0xFF) and used by Simplicity Studio 6 to compute compensated RH and temperature outputs. The SI7022-23-EVB itself does not store or modify calibration data.

Can the SI7022-23-EVB be used for long-term environmental monitoring deployments?

No - the SI7022-23-EVB is intended solely for lab-based evaluation and firmware development, not field deployment. It lacks environmental sealing, conformal coating, or robust mechanical mounting features. For production use, designers must integrate the SI7022-A20 IC into a purpose-built PCB meeting IP rating, thermal management, and EMC requirements. The SI7022-23-EVB serves only as a reference for correct sensor implementation.

Is the SI7022-23-EVB compatible with third-party I²C hosts beyond Silicon Labs devices?

Yes, the SI7022-23-EVB uses standard I²C signaling and voltage levels (3.3 V logic), making it interoperable with any I²C master capable of 100/400 kHz operation and proper pull-up configuration. Verified compatibility includes Arduino (with level-shifting), Raspberry Pi, and STM32 Nucleo boards. However, full register-level access and calibration coefficient interpretation require referencing the SI7022-A20 datasheet - not specific to the SI7022-23-EVB hardware.