TSL230

The Texas Instruments TSL230 is a programmable light-to-frequency converter designed for high-resolution conversion of light intensity into a frequency output. This monolithic CMOS integrated circuit combines a configurable silicon photodiode with a current-to-frequency converter, eliminating the need for external components. The output frequency is directly proportional to the incident light intensity, and the device features selectable sensitivity ranges and programmable full-scale output frequencies.

Key electrical specifications include an absolute output frequency tolerance of ±5% for the TSL230B variant, a typical nonlinearity error of 0.2% at 100 kHz, and a stable temperature coefficient of 100 ppm/°C. It operates from a single supply voltage down to 2.7V and includes a power-down feature. The device is characterized for operation over a temperature range of -25°C to 70°C.

The TSL230 communicates directly with microcontrollers via TTL-compatible inputs and outputs, facilitating programming and interface. An output enable pin allows for high-impedance state for sharing microcontroller input lines. The photodiode area is typically 1.36 mm².

Packaged in a clear plastic 8-pin dual-in-line package, the TSL230 is suitable for through-hole mounting. Its design allows for direct integration into systems requiring precise light measurement and conversion to a digital frequency signal.