TSL230RD, TSL230ARD, TSL230BRD PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTERS TAOS054P OCTOBER 2007 PACKAGE D High-Resolution Conversion of Light 8-LEAD SOIC Intensity to Frequency With No External (TOP VIEW) Components Programmable Sensitivity and Full-Scale S0 1 8 S3 Output Frequency S1 2 7 S2 Communicates Directly With a Microcontroller High Irradiance Responsivity . OE 3 6 OUT 2 790 Hz/( W/cm ) Typical at 640 nm GND 4 5 V DD Single-Supply Operation . 2.7 V to 5.5 V Power-Down Feature...5 A Typical Nonlinearity Error Typically 0.2% at 100 kHz Stable 200 ppm/C Temperature Coefficient Low-Profile Lead (Pb) Free and RoHS Compliant Surface-Mount Package Description The TSL230RD, TSL230ARD, and TSL230BRD programmable light-to-frequency converters combine a configurable silicon photodiode and a current-to-frequency converter on single monolithic CMOS integrated circuit. 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. The output enable (OE) places the output in the high-impedance state for multiple-unit sharing of a microcontroller input line. The devices are available with absolute output frequency tolerances of 10% (TSL230BRD), 15% (TSL230ARD), and 20% (TSL230RD). They have been temperature compensated for the ultraviolet-to-visible light range of 320 nm to 700 nm and respond over the light range of 320 nm to 1050 nm. The devices are characterized over the temperature range of 25C to 70C. Functional Block Diagram Output Current-to-Frequency Light Photodiode Array Converter OE S0 S1 S2 S3 Copyright 2007, TAOS Inc. The LUMENOLOGY Company Texas Advanced Optoelectronic Solutions Inc. 1001 Klein Road Suite 300 Plano, TX 75074 (972) 673-0759 www.taosinc.com 1TSL230RD, TSL230ARD, TSL230BRD PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTERS TAOS054P OCTOBER 2007 Terminal Functions TERMINAL TYPETYPE DESCRIPTIONDESCRIPTION NAME NO. GND 4 Ground OE 3 I Enable for f (active low) O OUT 6 O Scaled-frequency (f ) output O S0, S1 1, 2 I Sensitivity-select inputs S2, S3 7, 8 I f scaling-select inputs O V 5 Supply voltage DD Selectable Options S1 S0 SENSITIVITY S3 S2 f SCALING (divide-by) O L L Power down L L 1 L H 1 L H 2 H L 10 H L 10 H H 100 H H 100 Available Options DEVICE T PACKAGE LEADS PACKAGE DESIGNATOR ORDERING NUMBER A TSL230RD 25C to 70C SOIC8 D TSL230RD TSL230ARD 25C to 70C SOIC8 D TSL230ARD TSL230BRD 25C to 70C SOIC8 D TSL230BRD Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, V (see Note 1) . 6 V DD Input voltage range, all inputs, V . 0.3 V to V + 0.3 V I DD Operating free-air temperature range, T 40C to 85C A Storage temperature range 40C to 85C Solder conditions in accordance with JEDEC J STD020A, maximum temperature (see Note 2) . 260C Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values are with respect to GND. 2. The device may be hand soldered provided that heat is applied only to the solder pad and no contact is made between the tip of the solder iron and the device lead. The maximum time heat should be applied to the device is 5 seconds. Recommended Operating Conditions MIN NOM MAX UNIT Supply voltage, V 2.7 5 5.5 V DD High-level input voltage, V V = 4.5 V to 5.5 V 2 V V IH DD DD Low-level input voltage, V V = 4.5 V to 5.5 V 0 0.8 V IL DD Operating free-air temperature range, T 25 70 C A Copyright 2007, TAOS Inc. The LUMENOLOGY Company 2 www.taosinc.com