SFH5711-2/3-Z is an Ambient Light Sensor (ALS) IC developed by ams OSRAM (formerly OSRAM), precisely matched to the human eye spectral sensitivity (CIE V(lambda) curve). It offers both analog current output and I2C digital output modes for maximum design flexibility.

Housed in the TSLR-4 ultra-compact surface-mount package (1.4 x 1.75 x 0.65mm), it is ideal for smartphone screen auto-brightness, automotive dashboard/headlight control, and daylight compensation in lighting systems. The I2C interface allows direct lux readout without external ADC, while the analog current output mode provides continuous real-time sensing.

Two versions target different scenarios: SFH5711-3 (20uA/lux) suits indoor/dim environments and smartphone backlight applications; SFH5711-2 (8uA/lux) is optimized for outdoor/high-brightness conditions.

SFH5711-2/3-Z uses the ultra-compact TSLR-4 (Thin Sidelooker Reflector, 4-pin) package with dimensions of 1.4mm x 1.75mm x 0.65mm. The TSLR-4 features an integrated light pipe reflector that directs ambient light onto the sensor die with a defined viewing angle, making it ideal for placement beneath a smartphone screen or behind a light pipe in display-based applications.

The 4-pin SMD package is fully reflow-solder compatible and suitable for high-volume production. The built-in light pipe eliminates the need for external mechanical light-guiding structures, simplifying system design and reducing assembly cost.

The SFH5711-2/3-Z TSLR-4 package has 4 functional leads. Key pin definitions are as follows (top view, marking side up):

• Pin 1 - VDD: Supply voltage pin. Connect to 2.3V~5.5V. Place a 100nF decoupling capacitor as close as possible to this pin.
• Pin 2 - GND: Ground reference. Connect to system ground plane.
• Pin 3 - IALS: Analog current output / I2C data (SDA). In analog mode, this pin sources current proportional to illuminance: IALS = Ev(lux) x sensitivity(uA/lux). In I2C mode, this is the serial data line.
• Pin 4 - SCL: I2C clock input. In I2C mode, data is sampled on the rising edge of SCL. In analog mode, this pin may be left open or tied to VDD depending on configuration.

The following alternative parts are listed for reference. Before selecting an alternative, verify communication interface, supply voltage, sensitivity range, spectral match, and dimensional compatibility.

Selection Tips: When selecting alternatives, pay attention to: spectral match (CIE V(lambda) curve matching is critical for display brightness control applications); illuminance range matching the target environment (outdoor vs. indoor); I2C address compatibility with existing bus devices; package form factor and light pipe compatibility.

ams OSRAM AG (SIX: AMS), headquartered in Graz, Austria, is a globally leading optical semiconductor solutions provider organized around three pillars: Sensor, Lighting, and Visualization. The merger of OSRAM (lighting) and ams (sensors) enables delivery of high-performance optical solutions across automotive, mobile, industrial, lighting, and medical applications. The SFH5711 is a flagship product in ams OSRAM's ambient light sensor family, widely deployed in smartphone and automotive display systems worldwide.

ams OSRAM invests heavily in proprietary wafer-level optics integration, embedding light pipes, apertures, and spectral filters directly into the package - a capability that gives the SFH5711 its ultra-compact form factor and precise angular response. The company's sensors division holds a dominant market position in mobile device ambient light sensing, powering displays in hundreds of millions of smartphones.