ams OSRAM TSL2585 Miniature Ambient Light Sensor

ams OSRAM TSL2585 Miniature Ambient Light Sensor integrates multiple applications within one device: ambient light sensing for display brightness management, ambient UV index estimation, and auto exposure/flicker detection for camera assistance. The device incorporates Photopic, IR, and UV photodiodes connected to three modulators. Inside there is an analog front-end with up to 4096x gain and three 20bit resolution AD converters sampling at 14kHz. TSL2585 operates from 1.7V to 2.0V and connects through a 1.8V, I²C interface with consumption of 700nA at 1.8V. The ams OSRAM TSL2585 Miniature Ambient Light Sensor comes in a low-profile, small footprint, 2.0mm x 1.0mm x 0.35mm (LxWxH), 6-pin OLGA package.

Covered with an optimized Photopic filter, the Photopic photodiode area, associated with a dedicated IR channel, accurately measures ambient light and enables the irradiance of different light sources. Calculation results help to automatically optimize display brightness under other lighting conditions for a better user experience.

Executed in parallel with ambient light sensing, the TSL2585 with the integrated functionality of ambient light flicker detection uses the same photodiodes. The flicker detection engine will sample and buffer data for calculating flicker frequencies externally on a host CPU.

Covered with a band-pass UV filter, the UV photodiode area, combined with Photopic and IR channels, allows the estimation of the ambient UV index by running an algorithm externally on a host CPU.

Features

Invisible ALS sensing under any glass type
- Configurable, high-sensitivity
  - Programmable gain and integration time
  - 4098x dynamic range by gain adjustment only
  - 1mlux detectable illuminance
- Tailored ALS response
  - Photopic filter for visible channel
  - Independent IR channel
- ALS interrupt with thresholds
Integrated light flicker detection on chip
- Concurrent flicker and ALS measurement with simplified readout methodology
- Independently configurable sample time
- Up to 7kHz flicker detection (14kHz sampling)
- FIFO buffer interrupt

Auxiliary information for ambient UV index estimation
- UVA channel with independent and programmable channel gain
- Photopic filter for visible channel
- Independent IR channel
Low power consumption and minimum I²C traffic
- 1.8V_DD operation
- Configurable sleep mode
- Interrupt-driven device
- I²C interface up to 1Mbit/s (Fast mode)
Integrated status checking for all functions with digital and analog saturation flags
Reduced I²C bus traffic load on-chip data compression