The TSL238 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter on a single monolithic CMOS integrated circuit.
Output is a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance) on the photodiode.
Key Features
the incident irradiance in μW/cm2
fD is a constant error term in the output frequency calculation resulting from leakage currents, and is independent of light intensity. The TSL238 die is trimmed to mini.
Full PDF Text Transcription for TSL238 (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
TSL238. For precise diagrams, and layout, please refer to the original PDF.
r r D High-Resolution Conversion of Light Intensity to Frequency With No External Components D High Irradiance Responsivity . . . 2.3 kHz/(mW/cm2) at λp = 524 nm D Low Da...
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Irradiance Responsivity . . . 2.3 kHz/(mW/cm2) at λp = 524 nm D Low Dark Frequency . . . < 2 Hz at 255 C D Single-Supply Operation . . . 2.7 V to 5.5 V D Stable 200 ppm/°C Temperature Coefficient D Interfaces Directly to a Microcontroller D Lead (Pb) Free Package D RoHS Compliant TSL238 HIGH-SENSITIVITY LIGHT-TO-FREQUENCY CONVERTER TAOS073J − SEPTEMBER 2008 PACKAGE D 8-LEAD SOIC (TOP VIEW) NC 1 NC 2 NC 3 NC 4 8 OUT 7 VDD 6 GND 5 OE Technical coantmesntAsGtill valid Description The TSL238 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter on a single monolithic CMOS integrated ci
TSL238 Datasheet
