TSL220 LIGHT-TO-FREQUENCY CONVERTER

SOES003 - AUGUST 1990 - REVISED JUNE 1991

features

High-Resolution Conversion of Light Intensity to Frequency
Wide Dynamic Range . . . 118 dB
Variable (and Single) Supply Range . . . 5 V to 10 V
High Linearity . . . Typically Within 2% of FSR (C = 100 pF)
High Sensitivity . . . Can Detect Change of 0.01% of FSR
CMOS Compatible Output for Digital Processing
Minimum External Components
Microprocessor Compatible

description

The TSL220 consists of a large-area photodiode and a current-to-frequency converter. The output voltage is a pulse train and its frequency is directly proportional to the light intensity (irradiance) on the photodiode. The output is CMOS compatible and its frequency may be measured using pulse counting, period timing, or integration techniques. The TSL220 is ideal for light-sensing applications requiring wide dynamic range, high sensitivity, and high noise immunity. The output frequency range is determined by an external capacitor; hence, the desired output frequency is adjustable for a given light intensity at the input. The TSL220 is characterized for operation over the temperature range of -25°C to 70°C.

Use of LSTTL logic families may require a 3300- pulldown resistor on the output.

Title: LIGHT-TO-FREQUENCY CONVERTER
Product Family: LIGHT TO FREQUENCY
Device Functionality: LIGHT-TO-FREQUENCY CONVERTER , HIGH-RESOLUTION CONVERSION OF LIGHT INTENSITY TO FREQUENCY, SINGLE (VARIABLE) SUPPLY OPERATION, HIGH SENSITIVITY, CMOS-COMPATIBLE OUTPUT FOR DIGITAL PROCESSING, MICROPROCESSOR COMPATIBLE, 8-PIN CLEAR DIP.

View the complete PDF datasheet: soes003.pdf (165 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:TSL220

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