features description applications ? large active area ? low noise ? high shunt resistance ? hermetically sealed ? high saturation symbol parameter min max units v br reverse voltage 25 v t stg storage temperature 55 +150 c t o operating temperature 40 +125 c t s soldering temperature* +240 c silicon pin photodiode sandwich detector sd 138 - 1 1 - 31 - 21 1 to-5 package the sd 1 38 - 1 1 - 31 - 21 1 device features two silicon pin photodiodes vertically integrated a hermetic to5 package. the top photodiode absorbs a portion of the light and the remaining light is transmitted to the bottom photodiode. the current ratio of the two photodiodes is used to remotely determine and monitor the color temperature of an object. the SD138-11-31-211 can find application in dual wavelength power meters and remote color temperature sensing. ? dual wavelength power meters ? remote color temperature sensing * 1/16 inch from case for 3 seconds max. chip dimensions inch [mm] typical spectral response 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 200 400 600 800 1000 1200 wavelength (nm) responsivity (a/w)
2 parameter conditions min typ max units active area diameter (top) 3.5 mm active area diameter (bottom) 3.1 mm spectral range of (top) 300 to 1100 nm spectral range of (bottom) 950 to 1100 nm shunt resistance bias: 10mv 50 200 m w responsivity wavelength = 950 nm 0.50 0.60 a/w reak nep (bottom) wavelength = 1050 0.135 0.155 a/w peak nep (top) wavelength = 950 12 25 fw/hz peak nep (bottom) wavelength = 1050 45 100 fw/hz capacitance 290 305 pf operating temperature 55 +100 oc storage temperature 55 +100 oc electro - optical characteristics of top and bottom photodiodes @ + 23c and volts bias unless otherwise specified information in this technical datasheet is believed to be correct and reliable. however, no responsibi lity is assumed for possible inaccuracies or omissi on. specifications are subject to change without notice. advanced photonix inc. 1240 avenida acaso, camarill o ca 93012 ? phone (805) 9870146 ? fax (805) 4849 935 ? www.advancedphotonix.com rev 6/11/09
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