SI1143-A11-GMR — Overview
SI1143-A11-GMR by Silicon Labs is a component in the Proximity and Ambient Light Sensor with I2C Interface and 3 LED Drivers category, supplied by Shenzhen Jinteng Electronics Technology Co., Ltd. (JTDZ Tech) — an independent distributor serving OEMs, ODMs and EMS providers worldwide.
The Si1143-A11-GMR is a low-power, reflectance-based infrared proximity and ambient light sensor with an I2C digital interface. It integrates visible and IR photodiodes, a 16-bit ADC, a digital signal processor and three independent IR LED drivers programmable from 5.6 mA to 360 mA. Proximity detection is adjustable from under 1 cm to 200 cm, and the ambient light channel covers 1 to 128 klx with 100 mlx resolution, making it suitable for touchless UI, presence detection and backlight control under dark glass.
Key specifications
| Part number | SI1143-A11-GMR |
| Manufacturer | Silicon Labs |
| Device type | Proximity / Ambient Light Sensor IC |
| Package | QFN-10 |
| Package size | 2.00 x 2.00 x 0.65 mm |
| Stock | 5,000 pcs |
| Condition | Original, genuine & unused |
Datasheet parameters
| Optical channels | Visible ALS + IR ALS + reflectance proximity, 3 independent LED driver outputs |
| ADC resolution | 16-bit |
| I2C interface | Up to 3.4 Mbps, 7-bit slave address 0x5A |
| Supply voltage | 1.71 to 3.6 V |
| Proximity detection range | Under 1 cm up to 200 cm; 50 cm with a single pulse at 3 klx |
| LED driver current | 15 steps, 5.6 mA to 360 mA per driver |
| LED pulse width | 25.6 us |
| Ambient light range | 1 to 128 klx, 100 mlx resolution |
| Average current | 9 uA (25.6 us pulse every 800 ms at 180 mA plus 3 uA supply) |
| Standby current | < 500 nA |
| Interrupt output | Open-drain INT with programmable thresholds |
| Operating temperature | -40 to +85 °C |
| Package | 10-lead 2 x 2 x 0.65 mm QFN |
Parameters above are transcribed from the manufacturer datasheet for reference only. Confirm the current datasheet revision and your application conditions before design-in.
Note: A11 = 10-lead 2x2 mm QFN; GMR = tape and reel. The 7-bit I2C address is fixed at 0x5A (the device also responds to the global address 0x00). Silicon Labs' infrastructure & automotive business was acquired by Skyworks in 2021, but the Si114x optical sensor family remains a Silicon Labs-branded, active product. Current datasheet revision is 1.42 (3/21).
Stock, packaging and availability
| Item | Detail |
|---|---|
| Available quantity | 5,000 pcs |
| Condition | Original, genuine & unused |
| Packaging | Original factory packaging — tape & reel, tray, tube or bulk as supplied by the manufacturer |
| Warehouse | Shenzhen, China |
| Lead time | Confirmed per order — typically ships within 24–48 hours after payment |
Stock levels move quickly. Confirm current availability, quantity and lead time with our team before ordering.
Need a quote for SI1143-A11-GMR? Send your target quantity, destination and required date code to our sales team — we reply with price, stock and lead time within 2 working hours.
Browse the full Sensors / Optoelectronic Devices collection for more Proximity Light Sensor devices, or request a quote for SI1143-A11-GMR.
Other Silicon Labs parts in stock
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| SI4703-C19-GMR | SI8663BC-B-IS1R | SI5351A-B-GMR |
Frequently asked questions
Is SI1143-A11-GMR original and genuine?
Yes. We supply SI1143-A11-GMR as original, unused stock sourced through long-verified, traceable channels. Traceability documents, inspection reports and photos of the actual goods can be provided on request before you commit.
How much SI1143-A11-GMR stock do you have?
5,000 pcs of SI1143-A11-GMR are currently listed. Stock moves daily - send us your required quantity and we will confirm live availability, date code and lead time.
What package does SI1143-A11-GMR use?
SI1143-A11-GMR is supplied in a QFN-10 package (2.00 x 2.00 x 0.65 mm). Always confirm the package, pinout and land pattern against the current manufacturer datasheet before design-in.
Can you help confirm the SI1143-A11-GMR parameters?
Yes. Tell us the parameters you are qualifying (frequency range, gain, attenuation, voltage, current or temperature range) and our team will help you confirm them against the current manufacturer datasheet. We do not host third-party datasheets.
Do you quote volume orders for SI1143-A11-GMR?
Yes. We quote volume pricing, available quantity and lead time within 2 working hours, and we can consolidate SI1143-A11-GMR with other line items into a single shipment.
All trademarks, brand names and part numbers are the property of their respective owners. JTDZ Tech is an independent distributor and is not an authorised distributor, franchisee or agent of the manufacturers named above.
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