Silicon Labs SI7005EVB-UDP-F960

Overview

SI7005EVB-UDP-F960 from Silicon Laboratories is an evaluation board designed to demonstrate and validate the Si7005 digital I²C humidity and temperature sensor IC. It provides full access to the 24-pin QFN sensor, onboard I²C pull-up resistors, decoupling capacitors (0.1 µF and 4.7 µF), and configurable CS control-enabling rapid prototyping of HVAC/R, thermostats, and asset tracking systems requiring ±4.5% RH and ±1 °C accuracy over –40 to +85 °C.

For engineers reviewing the SI7005EVB-UDP-F960 datasheet, SI7005EVB-UDP-F960 pinout, SI7005EVB-UDP-F960 application, or SI7005EVB-UDP-F960 equivalent, this board delivers verified signal integrity, factory-calibrated sensor behavior, reflow-safe layout with exposed thermal pad, and direct integration with microcontroller I²C buses operating up to 400 kHz-supporting design validation without custom PCB spin.

Technical Context

The SI7005EVB-UDP-F960 implements the Si7005 sensor in a 4×4 mm 24-pin QFN package with integrated protective cover (hydrophobic/oleophobic PTFE, IP67-rated), enabling operation across 0–100% RH and –40 to +85 °C (G grade). It supports I²C communication at 400 kHz with 7-bit address 0x40 and includes on-board CEXT capacitor interface for heater control.

Board-level features include dedicated SDA/SCL routing with 10 kΩ pull-ups, VDD decoupling (0.1 µF ceramic + 4.7 µF bulk), CS-controlled power-down mode (≤100 µA standby), and thermal management via EPAD grounding-ensuring stable sensor performance during humidity/temperature conversion cycles (35 ms typical, 18 ms fast mode).

Key Specifications

Availability

SI7005EVB-UDP-F960 is available at Aetrix Electronics and suitable for HVAC/R commissioning, thermostat firmware validation, respiratory therapy device qualification, and white goods environmental sensing requiring stable component supply and traceable evaluation hardware.

Supply support for SI7005EVB-UDP-F960 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 Laboratories is a fabless semiconductor company specializing in mixed-signal ICs for timing, sensing, connectivity, and MCU applications-with emphasis on low-power, high-accuracy sensor solutions for industrial and consumer markets.

The Si7005 product line delivers factory-calibrated, monolithic humidity/temperature sensing for applications demanding long-term stability, reflow resilience, and seamless I²C integration-targeting environments where drift, contamination, and thermal hysteresis must be minimized.

FAQ

What is the primary function of the SI7005EVB-UDP-F960 evaluation board?

The SI7005EVB-UDP-F960 evaluation board is designed to demonstrate and validate the Si7005 digital I²C humidity and temperature sensor IC. It provides immediate access to calibrated sensor outputs, supports full I²C register read/write operations, and incorporates recommended decoupling, pull-up, and thermal design practices-allowing engineers to verify sensor performance in real-world conditions before committing to custom PCB layout.

Does the SI7005EVB-UDP-F960 include the Si7005 sensor with protective cover?

Yes, the SI7005EVB-UDP-F960 integrates the Si7005 sensor with its optional factory-installed hydrophobic/oleophobic PTFE protective cover (IP67 rated). This cover remains in place during reflow soldering and throughout product life, excluding liquids and particulates while permitting water vapor diffusion-critical for maintaining accuracy in harsh or dusty environments.

What are the key electrical interfaces supported by the SI7005EVB-UDP-F960?

The SI7005EVB-UDP-F960 exposes the full Si7005 pin set including SDA, SCL, CS, VDD, GND, and CEXT. It features onboard 10 kΩ I²C pull-up resistors, 0.1 µF and 4.7 µF decoupling capacitors, and direct access to the CS pin for hardware-controlled power-down-enabling low-power operation (≤100 µA standby) and heater activation via CEXT.

Can the SI7005EVB-UDP-F960 be used for production deployment?

No, the SI7005EVB-UDP-F960 is strictly an evaluation and development tool-not qualified for production use. It lacks conformal coating, extended reliability testing, and industrial-grade mechanical mounting features. For production, designers must integrate the Si7005 IC (e.g., Si7005-A20-GM or Si7005-A20-FM) into their own PCB using the layout guidelines and thermal recommendations documented in the Si7005 datasheet.

How does the SI7005EVB-UDP-F960 support temperature compensation of humidity readings?

The SI7005EVB-UDP-F960 hosts the Si7005 IC, which includes an on-chip temperature sensor used to compensate RH measurements. The board enables direct acquisition of both raw RH and temperature values via I²C, allowing firmware to apply the documented second-order linearization and temperature compensation equations (using coefficients A0/A1/A2 and Q0/Q1) to achieve <±0.05%/°C RH drift after correction.