TSL230AR

t TSL230R, TSL230AR, TSL230BR PROGRAMMABLE LIGHTĆTOĆFREQUENCY CONVERTERS t TAOS048 – OCTOBER 2002 D High-Resolution Conversion of Light D D D D D D D Intensity to Frequency With No External Components Programmable Sensitivity and Full-Scale Output Frequency Communicates Directly With a Microcontroller Single-Supply Operation Down to 2.7 V, With Power-Down Feature Absolute Output Frequency Tolerance of ±5% (TSL230BR) Nonlinearity Error Typically 0.2% at 100 kHz Stable 150 ppm/°C Temperature Coefficient Replacements for TSL230, TSL230A, and TSL230B PACKAGE P 8-LEAD PDIP (TOP VIEW) S0 S1 OE GND 8 2 3 4 7 6 5 S3 S2 OUT VDD www.DataSheet4U.com Description The TSL230R, TSL230AR, and TSL230BR programmable light-to-frequency converters combine a configurable silicon photodiode and a current-to-frequency converter on single monolithic CMOS integrated circuits. The output can be either a pulse train or a square wave (50% duty cycle) with frequency directly proportional to light intensity. Device sensitivity is selectable in three ranges, providing two decades of adjustment. The full-scale output frequency can be scaled by one of four preset values. All inputs and the output are TTL compatible, allowing direct two-way communication with a microcontroller for programming and output interface. An output enable (OE) is provided that places the output in the high-impedance state for multiple-unit sharing of a microcontroller input line. The devices are available with absolute-output-...