LX1972IBC-TR

The LX1972IBC-TR from Microsemi Corporation is a low-cost silicon light sensor designed to emulate the human eye's spectral response. It offers a peak spectral response at 520nm with minimal IR sensitivity above 900nm. This sensor utilizes a PIN diode array with a linear and repeatable current transfer function, amplified by integrated high-gain current mirrors.

The device operates with a voltage range of 1.4V to 5.5V and requires minimal headroom, typically 1.8V at 1000 Lux. It is temperature stable, with internal compensation keeping dark current below 200nA across its operating temperature range of -40°C to +85°C. The usable ambient light conditions range from 1 to over 5000 Lux.

Designed for ease of use, the LX1972IBC-TR outputs a current that can be directly used or converted to a voltage with an external resistor. It is optimized for controlling backlighting systems in consumer products like LCD TVs, portable computers, and digital cameras. The sensor is housed in a clear, two-pin 1206 package and is suitable for surface mount applications.

Key features include its approximate human eye spectral response, low IR sensitivity, and highly accurate, repeatable output current versus light. It is voltage scalable, temperature stable, and does not require optical filters. The low dark leakage current makes it suitable for accurate measurements even at low light levels.