61120 Mii PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTER OPTOELECTRONIC PRODUCTS DIVISION Features: Applications: • • • • • High resolution Conversion of Light Intensity to Frequency With No External Components Programmable Sensitivity and Full-Scale Output Frequency Advanced LinCMOSTM Technology Single-Supply Operation Down to 2.7V, with Power-Down Feature • • Incorporates wide dynamic range, high-resolution light measurement functions into a system using a singlecomponent solution Communicates Directly With a Microcontrollers eliminating the need for A/D converters Determines the clarity of the liquid DESCRIPTION The 61120 programmable light-to-frequency converter combines a configurable silicon photodiode and a currentto-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. The sensitivity of the device 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 device is available with absolute-output-frequency tolerance of ±20%. Its circuit has been temperature compensated for the ultraviolet-to-visible-light range of 300nm to 700nm. The device is characterized for operation over the temperature range of -25°C to 70°C. Glass lens inhibits UV degradation. ABSOLUTE MAXIMUM RATINGS Storage Temperature............................................................................................................................................ .-25°C to +85°C Operating Free-Air Temperature Range ............................................................................................................... -25°C to +70°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds.……......................…. ..................................................+260°C Input Voltage Range, all inputs,VI................................................................................................................... -0.3 V to VDD +0.3 V Supply Voltage – VDD ............................................................................................................................................................. 6.5V Package Dimensions 8 7 6 Schematic Diagram 5 S0 1 8 S3 7 S2 PHOTODIODE 1 2 3 S1 4 2 TOP VIEW PIN ONE 0.007 [0.18] 0.013 [0.33] SIDE VIEW 3 GND 4 CURRENT TO FREQ. CONVERTER 6 Vout 0.170 [4.32]MAX 0.280 [7.11] 0.310 [7.88] 0.320 [8.13]MAX OE 5 0.020 [0.51] MIN .020 [0.51] MAX 0.90 [2.28] 0.110 [2.80] END VIEW ALL DIMENSIONS ARE IN INCHES [MILLIMETERS] MICROPAC INDUSTRIES, INC. OPTOELECTRONIC PRODUCTS DIVISION • 725 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 487-6918 www.micropac.com E-MAIL: [email protected] Vcc 61120 PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTER ELECTRICAL CHARACTERISTICS Ta = -25°C, VDD = 5V unless otherwise specified. PARAMETER SYMBOL UNITS TEST CONDITIONS V IOH = -4 mA 0.26 V IOL = 4 mA IIH 1uA uA IIL 1uA uA High-Level Output Voltage VOH Low-Level Output Voltage VOL High-Level Input Current Low-Level Input Current MIN TYP 4 4.3 MAX 0.17 Supply Current NOTE Power-on mode Power-down mode Full-Scale Frequency 1.1 MHz Temperature Coef. Output Feq. Supply Voltage Sensitivity 1 ±100 ppm/°C λ ≤ 700nm, -25°C ≤ TA ≤ 70°C 0.5 %/V VDD = 5V ±10% kSVS OPERATING CHARACTERISTICS Ta = 25°C, Vdd = 5V PARAMETER SYMBOL TSL230 min typ 0.8 Output Frequency 0.8 1.2 0.1 10 1 1.2 0.13 10 1 1.2 0.5 10 125 550 tW Nonlinearity Recovery from power down Step response to full-scale input Response Time to programming change Response Time to Output Enable /(OE) 1 Min TSL230B typ 0.9 0.9 max 1 1.1 0.1 10 1 1.1 0.13 10 Min typ Max 0.95 UNITS MHz 0.1 10 0.95 Hz MHz fO 0.8 Output Pulse Duration TSL230A max 0.9 1 1.1 0.5 10 125 550 0.13 0.95 Hz MHz 0.5 10 125 Hz 550 .5fo .5fo .5fo ±.1% ±.1% ±.1% ±.1% ±.1% ±.1% ±.1% ±.1% ±.1% 100 10 100 TEST CONDITIONS NOTE S0 = H, S1 = S2 = S3 = L, 2 Ee = 130 mW/cm , λ p= 670 nm Ee = 0, S0 = H, S1 = S2 =S3 = L S1 = H, S0 = S2 = S3 = L, 2 Ee = 13 mW/cm , λ p= 670 nm Ee = 0, S1 = H, S0 = S2 =S3 = L S0 = S1 = H, S2 = S3 = L, 2 Ee = 1.3 mW/cm , λ p= 670 nm Ee = 0, S0 = S1 = H, S2 =S3 = L S2 = S3 = H S2 or S3 = H %F.S. fO = 0 Hz to 10 kHz fO = 0 Hz to 100 kHz fO = 0 Hz to 1 MHz 100 2 us 1 pulse of new frequency plus 1 us 3 2 periods of new principal frequency plus 1 us 50 150 50 150 50 150 ns Note: 1. Full-scale freqency is the maximum operating of the device without saturation. 2. Nonlinearity is defined as the deviation of fO from a straight line between zero and full scale, expressed as a percent of full scale. 3. Principal frequency is the internal oscillator frequency, equivalent to divide-by-1 output selection. MICROPAC INDUSTRIES, INC. OPTOELECTRONIC PRODUCTS DIVISION • 725 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 487-6918 www.micropac.com E-MAIL: [email protected] 61120 PROGRAMMABLE LIGHT-TO-FREQUENCY CONVERTER RECOMMENDED OPERATING CONDITIONS: PARAMETER Supply Voltage High-Level Input Voltage VDD = 4.5 V to 5.5 V Low-Level Input Voltage VDD = 4.5 V to 5.5 V Operating free-air temperature range SYMBOL VDD VIH VIL TA MIN 2.7 2 0 -25 MAX 6 VDD 0.8 70 UNITS V V V °C OPERATION INFORMATION Terminal Functions TERMINAL NAME NO. GND 4 /OE 3 OUT I/O DESCRIPTION Ground I Enable for fO (active low) 6 0 Scaled-Frequency (fO) output S0, S1 1, 2 I Sensitivity-select inputs S2, S3 VDD 7, 8 5 I fO scaling-select inputs Supply Voltage S1 S2 L L H H L H L H Selectable Options Sensitivity S3 S2 fO Scaling (divide-by) Power down L L 1 1x L H 2 10x H L 10 100x H H 100 TYPICAL CHARACTERISTICS MICROPAC INDUSTRIES, INC. OPTOELECTRONIC PRODUCTS DIVISION • 725 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 487-6918 www.micropac.com E-MAIL: [email protected]