DATASHEET ISL Features. Applications. Simplified Block Diagram. Pinout. Ordering Information. Pin Descriptions

Transcription

1 DATASHEET ISL99 Non-Linear Output Current, Low Power Ambient Light Photo Detect IC FN8 Rev. The ISL99 is a light-to-current silicon optical sensor combining a photodiode and current amplifiers on a single monolithic IC. Similar to human eyes, the photodiode has peak sensitivity at 55nm and spans from nm to 7nm, rejecting UV light and IR light. The input luminance range is from.3 lux to, lux. The integrated non-linear current amplifier boosts and converts the photodiode signal in a square root fashion, extending the light input dynamic range while maintaining excellent sensitivity at dim conditions with low lux levels. The device consumes minimal power over a wide range of ambient lux levels because the current consumption ramps at a square root fashion. A dark current compensation circuit aids the photodiode to minimize temperature dependent leakage currents in the absence of light, improving the light sensitivity at low lux levels. In addition, the ISL99 has an EN pin that can be used for a polling scheme extending portables battery life. The ISL99 is housed in an ultra compact mmx.mm ODFN plastic case surface mount package. Operation is rated from - C to +85 C. Simplified Block Diagram VDD LIGHT DATA PROCESS CURRENT AMPLIFIER OUTPUT CURRENT LIGHT INTENSITY IOUT Features Non-linear current output.3 lux to, lux range Dark current compensation Temperature compensated Human eye response.8v to 3.3V supply range Low supply current Fast response time Ld ODFN: mmx.mmx.7mm Pb-free (RoHS compliant) Applications Display and keypad dimming for: - Mobile devices: smart phone, PDA, GPS - Computing devices: notebook PC, webpod - Consumer devices: LCD-TV, digital picture frame, digital camera Industrial and medical light sensing Pinout VDD ISL99 ( LD ODFN) TOP VIEW IOUT GND PHOTODIODE ARRAY EN GND NC 3 THERMAL PAD* 5 NC EN Ordering Information PART NUMBER (Note) TEMP. RANGE ( C) PACKAGE (Pb-free) PKG. DWG. # ISL99IROZ-T7* - to +85 Ld ODFN L.x. *Please refer to TB37 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu plate - e termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-. *THERMAL PAD CAN BE CONNECTED TO GND OR ELECTRICALLY ISOLATED Pin Descriptions PIN NUMBER PIN NAME DESCRIPTION VDD Supply,.8V to 3.3V GND Ground 3 NC No connect EN Active LO enable 5 NC No connect IOUT Current output FN8 Rev. Page of 7

2 Absolute Maximum Ratings (T A = +5 C) Supply Voltage between VDD and GND V Pin Voltage (IOUT and EN) V to V DD Maximum Continuous Output Current ma Operating Temperature C to +85 C ESD Rating Human Body Model kV Machine Model V Thermal Information Thermal Resistance JA ( C/W) Ld ODFN Maximum Die Temperature C Storage Temperature C to + C Operating Temperature C to +85 C Pb-free reflow profile see link below CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: T J = T C = T A Electrical Specifications V DD = 3V, T A = +5 C, EN =, R L = k at IOUT pin, green LED light, unless otherwise specified. PARAMETER DESCRIPTION CONDITION MIN TYP MAX UNIT E Range of Input Light Intensity.3 to k lux VDD Power Supply Range V I DD Supply Current E = lux 9 µa E = lux 3 µa E = lux.5 µa I SD Supply Current when Shut Down EN = V DD 5 35 na I OUT Light-to-Current Accuracy E = lux.8 µa I OUT Light-to-Current Accuracy E = lux µa I DARK Dark Current Output in the Absence of Light E = lux, R L = M 5 na I OUT V O-MAX Output Current Variation Over Three Light Sources: Fluorescent, Incandescent and Halogen IOUT Max Output Compliance Voltage at 95% of Nominal Output % E = lux V DD -. V t R IOUT Rise Time (Note ) R L = k, E = 3 lux from Lux R L = k, E = lux from Lux t F IOUT Fall Time (Note ) R L = k, E = 3 lux to Lux R L = k, E = lux to Lux t D IOUT Delay Time for Rising Edge (Note ) R L = k, E = 3 lux from Lux R L = k, E = lux from Lux t S IOUT Delay Time for Falling Edge (Note ) R L = k, E = 3 lux to Lux R L = k, E = lux to Lux 7 µs µs µs 9 µs µs 8 µs 75 µs 5 µs V LO Maximum Voltage at EN pin to Enable.5 V V HI Minimum Voltage at EN pin to Disable V DD -.5 V I LO Input Current at EN pin V EN = V na I HI Input Current at EN pin V EN = 3V na FN8 Rev. Page of 7

3 Electrical Specifications V DD = 3V, T A = +5 C, EN =, R L = k at IOUT pin, green LED light, unless otherwise specified. (Continued) PARAMETER DESCRIPTION CONDITION MIN TYP MAX UNIT t EN Enable Time R L = k, E = lux µs t DIS Disable Time R L = k, E = lux µs NOTE:. Switching time measurement is based on Figures and. POWER SUPPLY OR SOURCE METER V DD INPUT LIGHT FUNCTION GENERATOR ISL99 R L V OUT OUTPUT % 9% t R t S 9% t F % % FIGURE. TEST CIRCUIT FOR RISE/FALL TIME MEASUREMENT t D FIGURE. TIMING DIAGRAM Typical Performance Curves NORMALIZED RESPONSE HUMAN EYE RESPONSE LIGHT SENSOR RESPONSE NORMALIZED LIGHT INTENSITY INCANDESCENT SUN WLED -. 8.k WAVELENGTH (nm) FIGURE 3. SPECTRAL RESPONSE WAVELENGTH (nm) FIGURE. SPECTRUM OF LIGHT SOURCES RADIATION PATTERN LUMINOSITY ANGLE RELATIVE SENSITIVITY FIGURE 5. RADIATION PATTERN FN8 Rev. Page 3 of 7

4 Typical Performance Curves (Continued) 7. INCANDESCENT 5 3 INCANDESCENT.. LIGHT INTENSITY (LUX) FIGURE. OUTPUT CURRENT vs LIGHT INTENSITY LIGHT INTENSITY (Lux) FIGURE 7. OUTPUT CURRENT vs LIGHT INTENSITY INCANDESCENT LIGHT INTENSITY (LUX) FIGURE 8. OUTPUT CURRENT vs LIGHT INTENSITY INCANDESCENT LIGHT INTENSITY (LUX) FIGURE 9. OUTPUT CURRENT vs LIGHT INTENSITY TRANSIENT TIME ( ms).. FALL TIME DELAY TIME BEFORE RISING DELAY TIME BEFORE FALLING RISE TIME LUX CHANGE FROM LUX (LUX) FIGURE. TRANSIENT TIME vs LUX CHANGE FROM LUX OUTPUT CURRENT (na) FIGURE. OUTPUT CURRENT vs TEMPERATURE AT LUX EQUIVALENT INPUT LIGHT (LUX) FN8 Rev. Page of 7

5 Typical Performance Curves (Continued) SUPPLY CURRENT (µa) NORMALIZED OUTPUT CURRENT VDD = 3V LIGHT Lux 3 Lux FIGURE. SUPPLY CURRENT vs TEMPERATURE AT LUX FIGURE 3. NORMALIZED OUTPUT CURRENT vs TEMPERATURE SUPPLY CURRENT (µa) 8 VDD = 3V LIGHT Lux 3 Lux FIGURE. SUPPLY CURRENT vs TEMPERATURE NORMALIZED OUTPUT CURRENT LIGHT Lux SUPPLY VOLTAGE (V) FIGURE 5. NORMALIZED OUTPUT CURRENT vs SUPPLY VOLTAGE SUPPLY CURRENT LIGHT Lux LIGHT INTENSITY V DD = 3V, R L = k LIGHT INTENSITY RISES FROM LUX TO 3 LUX AND FALLS FROM 3 LUX TO LUX WITH WHITE LED V OUT V SUPPLY VOLTAGE (V) FIGURE. SUPPLY CURRENT vs SUPPLY VOLTAGE FIGURE 7. TRANSIENT RESPONSE OF ISL99 TO CHANGE IN LIGHT INTENSITY FN8 Rev. Page 5 of 7

6 Application Information Light-to-Current and Voltage Conversion The ISL99 has responsiveness that is a square-root function of the light intensity intercepted by the photodiode in lux. Because the photodiode has a responsivity that resembles the human eye, conversion rate is independent of the light source (fluorescent light, incandescent light or direct sunlight)..8 A I OUT = E (EQ. ) lux Here, I OUT is the output current in µa, and E is the input light in lux. A load resistor R L is added to convert I OUT into V OUT. The output voltage can be expressed in Equation :.8 A V OUT = I OUT R L = E R (EQ. ) L lux Here, V OUT is the output voltage and R L is the value of the load resistor added. The compliance of the ISL99's output circuit may result in premature saturation of the output current and voltage when an excessively large R L is used. The output compliance voltage is mv below the supply voltage as listed in V O-MAX of the Electrical Specifications table on page. Optical Sensor Location Outline The green area in Figure 8 shows the optical sensor location outline of ISL99. Along the pin-out direction, the center line (CL) of the sensor coincides with that of the packaging. The sensor width in this direction is.39mm. Perpendicular to the pin-out direction, the CL of the sensor has an.9mm offset from the CL of packaging away from pin-. The sensor width in this direction is.mm..mm 99.mm SENSOR OFFSET.mm.9mm.39mm FIGURE 8. LD ODFN SENSOR LOCATION OUTLINE Copyright Intersil Americas LLC 8. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. For additional products, see Intersil products are manufactured, assembled and tested utilizing ISO9 quality systems as noted in the quality certifications found at Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see FN8 Rev. Page of 7

7 Package Outline Drawing L.x. LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN) Rev, 9/. A B PIN INDEX AREA PIN INDEX AREA REF (X). TOP VIEW X. 3 ± X. 35 ±. 5. M C A B BOTTOM VIEW (. 5) MAX.75 SEE DETAIL "X". C (. 5) (. 35) C BASE PLANE ( X. 3 ) SIDE VIEW SEATING PLANE.8 C (. 95) ( X. 55 ) C. REF 5. MIN.. 5 MAX. TYPICAL RECOMMENDED LAND PATTERN DETAIL "X" NOTES: Dimensions are in millimeters. Dimensions in ( ) for Reference Only. Dimensioning and tolerancing conform to AMSE Y.5m-99. Unless otherwise specified, tolerance : Decimal ±.5 Dimension b applies to the metallized terminal and is measured between.5mm and.3mm from the terminal tip. Tiebar shown (if present) is a non-functional feature. The configuration of the pin # identifier is optional, but must be located within the zone indicated. The pin # identifier may be either a mold or mark feature. FN8 Rev. Page 7 of 7