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Silicon Labs SI1120EK

Name: SI1120EK
Brand: Silicon Labs
SKU: SI1120EK
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI1120EK

Manufacturer:: Silicon Labs

Category:: Sensor Evaluation Boards

Package:

Datasheet:: SI1120EK.pdf

Description:: KIT EVAL FOR SI1120

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,799

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Product details

Overview

SI1120EK from Silicon Laboratories is an evaluation and development kit for the Si1120 infrared proximity and ambient light sensor, featuring a dedicated Si1120 evaluation board (EVB), C8051F930 target board, pre-loaded gesture-aware firmware, USB debug adapter, and AC/DC power adapter. It enables real-time X/Y/Z position calculation, four-directional swipe gesture recognition, and ambient light type classification (sunlight, incandescent, fluorescent) using OSRAM SFH 4650-Z IR emitters.

For engineers reviewing the SI1120EK datasheet, SI1120EK pinout, SI1120EK application, or SI1120EK equivalent, this kit supports rapid prototyping of touchless human interface systems requiring proximity-based position tracking, gesture control, and adaptive ambient light sensing in consumer electronics and interactive displays.

Technical Context

The SI1120EK integrates two PCBs: the Si1120 EVB hosting the U1 Si1120 sensor IC, seven IR emitters (D1–D7), and configurable J1 header for emitter selection; and the C8051F930-TB MCU board providing control, USB-to-UART bridging via CP2103, and firmware execution. Communication with host PC occurs over USB (P3) using virtual COM port drivers.

Firmware implements synchronized activation of three selected IR emitters to capture reflected energy, computes linearized distance per channel (Radius 1–3), then derives Cartesian X/Y/Z coordinates. Ambient light sensing and gesture classification (Swipe Left/Right/Up/Down) are performed onboard using thresholded speed parameters and real-time ALS data.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Sensor IC	Si1120 infrared proximity + ambient light sensor with integrated ADC and digital signal processing
IR Emitters	OSRAM SFH 4650-Z (45 mW, 20° half-angle); up to 7 mounted, 3 selectable via J1 header
Firmware Functionality	Pre-loaded C8051F930 firmware enabling real-time X/Y/Z coordinate calculation and 4-directional swipe gesture detection
Host Interface	USB 2.0 via CP2103 UART bridge; appears as virtual COM port on Windows/Linux/macOS
Software Tools	Si1120 Performance Analysis Tool (real-time graphing), Optical Sensors Programmer's Toolkit, Silicon Labs IDE support
Power Supply	AC/DC adapter (included) or USB bus power; C8051F930-TB supports wall, AAA, or coin-cell options

Availability

SI1120EK is available at Aetrix Electronics and suitable for touchless human interface development, gesture-controlled interactive displays, proximity-based user presence detection, and ambient-light-adaptive UI design requiring stable component supply and full evaluation infrastructure.

Supply support for SI1120EK 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 Inc. is a fabless semiconductor company headquartered in Austin, TX, specializing in mixed-signal ICs for timing, IoT, wireless, and sensor applications.

The SI1120EK belongs to Silicon Labs' optical sensor evaluation platform family, designed specifically to accelerate development of proximity- and gesture-enabled user interfaces using their Si11xx sensor ICs.

FAQ

What is the SI1120EK used for?

The SI1120EK is an evaluation kit for the Si1120 infrared proximity and ambient light sensor. It enables engineers to prototype touchless gesture interfaces, measure real-time X/Y/Z object position above the board, classify ambient light sources, and validate firmware behavior using the included Si1120 Performance Analysis Tool. The SI1120EK contains all hardware and software needed to begin development without additional toolchain setup.

Does the SI1120EK include pre-loaded firmware?

Yes, the SI1120EK ships with firmware pre-loaded onto the C8051F930 MCU. This firmware activates selected IR emitters, captures reflected signals via the Si1120 sensor, computes linearized distance values (Radius 1–3), derives X/Y/Z coordinates, detects four swipe gestures, and monitors ambient light type. The SI1120EK also provides downloadable .HEX images and source code for customization.

Which software tools are required to operate the SI1120EK?

The SI1120EK requires the CP210x USB-to-UART VCP driver and the Optical Sensors Programmer's Toolkit - which includes the Si1120 Performance Analysis Tool for real-time data visualization. Optional tools include the Silicon Labs IDE and Si1120 Evaluation Kit package for firmware modification and debugging. All software is freely available from Silicon Labs' official website.

How does the SI1120EK support gesture recognition?

The SI1120EK uses pre-loaded firmware that analyzes time-series proximity measurements from three independently activated IR emitters to detect directional hand motion. It recognizes Swipe Left, Right, Up, and Down based on speed parameter thresholds (1–18 scale) derived from raw PRX low-time counts. Gesture output and ambient light classification appear in dedicated group windows within the Si1120 Performance Analysis Tool.

Is the SI1120EK suitable for production deployment?

No - the SI1120EK is strictly an evaluation and development platform, not a production-ready module. It includes debug headers, multiple emitters, and a dual-board architecture optimized for experimentation. For production, designers must integrate the standalone Si1120 IC (e.g., Si1120-A-GM) into their own PCB with appropriate optics, emitter selection, and firmware. Silicon Labs explicitly marks the SI1120EK as "Not Recommended for New Designs" in its documentation.

SI1120EK Specifications

Product attributes: Attribute value

Manufacturer:: Silicon Labs

Series:: QuickSense™

Packaging:: Bulk

Product Status:: Not For New Designs

Sensor Type:: Proximity, Infrared

Sensing Range:: -

Interface:: -

Sensitivity:: -

Voltage - Supply:: -

Embedded:: Yes, MCU, 8-Bit

Contents:: Board(s), Cable(s), Power Supply

Utilized IC / Part:: C8051F930, Si1120

SI1120EK FAQ

1.How can I place an order for SI1120EK through Aetrix?

Please submit a Request for Quotation (RFQ) for SI1120EK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SI1120EK reliable?

The price and inventory of SI1120EK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI1120EK is usually 5 days.

3.What payment methods are accepted for SI1120EK?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI1120EK transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI1120EK?

SI1120EK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI1120EK order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SI1120EK?

For technical support, including SI1120EK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI1120EK requirements.

6.How does Aetrix verify that SI1120EK is sourced from the original manufacturer or authorized distributors?

All SI1120EK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI1120EK meets industry standards.

7.What is the process for return or replacement of SI1120EK?

All SI1120EK units undergo pre-shipment inspection (PSI). If there is an issue with SI1120EK, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SI1120EK part is unused and in its original packaging.

Return procedure for SI1120EK:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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