SM3321A optical sensor ic seiko npc corporation - 1 overview the SM3321A is an image sensor ic with a built-in single element photodiode of 0.5mm 2 . the ic can detect range of light wave from visible to infrared in itself . it is a superior sensor with noise immunity to integr ate photodetection circuits which consist of photodiodes and operational amplifiers. the gain of amplifiers in SM3321A is settable by setting external terminals, so that it can detect rang e of light wave from visible to infrared with high sensitivity. features package dimensions ? high-sensitivity preamplifier for visible to infrared detection using (unit: mm) a single ic ? gain setting and output control function by pin terminal setting (gs0, gs1, gs2, oen) ? transimpedance range: 2m to 48m ? photodiode detector size: 0.22mm2.34mm (0.5mm 2 photodetector surface area) ? anti-reflection film coating with little sensitivity changing by wavelength ? supply voltage range: 3.0 to 5.5v (single supply) ? current consumption: 1.0ma (typ)@v dd =5v, no load ? operating temperature range: -40 to +85c ? package: 8 pin hcob ordering information device package SM3321A 8 pin hcob typical application circuit SM3321A gs0 gs1 gs2 vdd vss out nc oen SM3321A gs0 gs1 gs2 vdd vss out nc oen SM3321A gs0 gs1 gs2 vdd vss out nc oen SM3321A gs0 gs1 gs2 vdd vss out nc oen a/d cpu gs0 gs1 gs2 e0 e1 e2 e3 -1 -2 -3 -4 4.7f 4.7f 4.7f 4.7f photodiode detect or dimensions origin: ic center unit : [mm] photodiode top view a pin no.1 1.650.15 0.60.1 3.050.1 0.83=2.4 0.3250.1 1.130.2 0.250.05 ic chip r0.15 2.80.1 1.5250.15 b a b xy 0.40 0.18 1.17 -1.17 package type : 8pin hcob package size : 2.8mm3.05mm photodiode detector size : 0.22mm2.34mm (0.5mm 2 photo detector surface area)
SM3321A seiko npc corporation - 2 pinout (top view) pin description no. name i/o function 1 vss s ground 2 out o analog output 3 nc - open circuit or vss level (low) 4 oen i pu output enable control inpu t output enabled when low. 5 vdd s supply voltage 6 gs2 i transimpedance (i/v) amplifier resistan ce control input h: vdd level; l: vss level 7 gs1 i post-amplifier gain control input h: vdd level; l: vss level 8 gs0 i post-amplifier gain control input h: vdd level; l: vss level *. s: power supply, o: output, i: input, i pu : input with pull-up resistance block diagram vss 1 2 3 4 8 pd 7 6 5 out nc oen gs0 gs1 gs2 vdd gc amp iv amp vss vdd nc gs2 gs1 gs0 oen offset cancel & buffer post amp photodiode reference voltage source control logic out
SM3321A seiko npc corporation - 3 specifications absolute maximum ratings v ss =0v parameter symbol condition rating unit supply voltage *1 v dd voltage between vdd and vss -0.3 to +7.0 v input voltage *1*2 v in oen, gs0, gs1, gs2 pins -0.3 to v dd +0.3 v output voltage *1*2 v out out pin -0.3 to v dd +0.3 v storage temperature *3 t stg -55 to +90 c *1. this parameter rating is the values that must never exceed even for a moment. this product may suffer breakdown if this pa rameter rating is exceeded. operation and characteristics are guaranteed only when the product is ope rated at recommended operating conditions. *2. v dd is a v dd value of recommended operating conditions. *3. when stored in nitrogen or vacuum atmosphere applied to ic itself only (excluding packaging materials). recommended operating conditions recommended operating conditions guarantee the electrical characteristic. v ss =0v parameter symbol condition rating unit min typ max supply voltage v dd voltage between vdd and vss 3.0 5.0 5.5 v out output load *1 c l out pin 80 pf operating temperature t a -40 85 c *1. the output load of the out output presumes capacitive load only. for current load, an error in the output voltage occurs, so the outputs must be used under high-impedance conditions. note. since it may influence the reliability if it is used out of range of recommended operati ng conditions, this product shou ld be used within this range. electrical characteristics dc characteristics reference circuit with recommended operating conditions, unless otherwise specified. parameter symbol condition rating unit min typ max current consumption i dd oen=v dd input, out output no load 1 2 ma input voltage 1 v ih1 gs0, gs1, gs2, oen pins 0.7v dd v v il1 0.3v dd input current 1 i ih1 gs0, gs1, gs2 pins v ih =v dd applied voltage 1 a i il1 gs0, gs1, gs2 pins v il =0v applied voltage -1 input current 2 i ih2 oen pin, v dd =5.0v, v ih =v dd applied voltage 1 a i il2 oen pin, vdd=5.0v, vil=0v applied voltage -40 -20 -5 out output voltage v oh 0.9v dd v v ol 0.05 output impedance z o out pin *2 0.4 1 k ? *1. the output impedance z o is given by the following equation, where v10 is the output voltage for 10k ? load resistance and v0 is the output voltage with no load. z o = (v0/v10-1) 10 [k ? ]
SM3321A seiko npc corporation - 4 photodiode characteristics ta=25c, reference circuit wi th recommended operating conditions, unless otherwise specifie d parameter symbol conditions rating min typ max unit spectral range of responsivity 1 1 s=50% of s 4 570 940 nm spectral range of responsivity 2 2 s=30% of s 4 470 570 nm photodiode responsivity 1 *1 s 1 470nm 0.22 a/w photodiode responsivity 2 *1 s 2 570nm 0.37 a/w photodiode responsivity 3 *1 s 3 630nm 0.42 a/w photodiode responsivity 4 *1 s 4 865nm 0.50 a/w photodiode responsivity 5 *1 s 5 940nm 0.35 a/w *1. typical characteristics determined on actual device photodiode spectral responsivity 0.0 0.1 0.2 0.3 0.4 0.5 0.6 400 500 600 700 800 900 1000 responsivity [a/w] wavelength [nm] photodiode responsivity spectral response measurements (typ sample) theoretical value
SM3321A seiko npc corporation - 5 analog electrical characteristics reference circuit with recommended operating conditions, unless otherwise specified parameter symbol conditions rating unit min typ max pre-amplifier transimpedance r ti gs2=0v input 0.4 0.5 0.6 m ? gs2=v dd input 2.4 3 3.6 m ? post-amplifier gain differential g diff gain differential relative to gs[2:0] gain settings -1 1 db dark voltage v od1 v dd =5.0v, ta=25c 20 mv v od2 v dd =5.0v, ta=85c 50 mv ac characteristics reference circuit with recommended operating conditions, unless otherwise specified parameter symbol condit ions min typ max unit settling time1 t st1 80pf out output load, time for output to reach 95% amplitude *1 gs2=0v (transimpedance: 2m ? ,3.2 m ? ,5 m ? ,8 m ? ) 5 10 s settling time2 t st2 80pf out output load, time for output to reach 95% amplitude *1 gs2= v dd (transimpedance: 12m ? ,19.2 m ? ,30 m ? ,48 m ? ) 18 30 s output voltage stabilization time *2 t w 5% output variation *1 1000 s output disable time *3 t z out 0.1 s interface wait time t si D 10 s input capacitance *4 c i oen, gs0, gs1, gs2 3 pf output capacitance *4 c o out 3.5 pf *1. out output presumed to reach reference value 100 s after output enable. *2. an output voltage error may occur if the output hold time does not satisfy rated value. *3. design value, provided as a guide for the output control time. *4. design value, representing the capacitance per terminal. provided as a guide for when designing circuit boards. ac characteristics oen out t st1, t st2 95% 100% 1005% 100 s t z t w t si 0.5v dd 0.5v dd 0.5v dd
SM3321A seiko npc corporation - 6 timing diagram functional description transimpedance setting the i/v amplifier impedance and post-amplifier gain can be select ed using gs0, gs1, and gs2 input state control. selecting the i/v amplifier impedance and post-amplifier gain also determines the transimpedance setting. input conditions transimpedance gs2 gs1 gs0 i/v amplifier resistance post-amplifier gain l l l 0.5m ? 12db 2.0m ? l l h 16db 3.2m ? l h l 20db 5.0m ? l h h 24db 8.0m ? h l l 3m ? 12db 12m ? h l h 16db 19.2m ? h h l 20db 30m ? h h h 24db 48m ? out output setting the out output can be controlled using the oen input. oen input out output l output enabled h hi-z oen out led led sensor light source settling time interface wait time t si > 10 s t st2 > 30 s a/d acq gs[2:0] a/d a/d gs
SM3321A seiko npc corporation - 7 reference circuit SM3321A gs0 gs1 gs2 vdd vss out nc oen cpu gs0 gs1 gs2 oen a/d 4.7f connect a laminated ceramic capacitor of 4.7 f or larger as close as possible to the supply voltage terminals. the normal value for each electrical characteristics parameter is measured using the reference circuit.
SM3321A seiko npc corporation - 8 typical application circuit the typical application circuits are provided for reference onl y, and do not represent a guarantee of circuit operation. we ac cept no liability for any damage resulting from the use of these circui ts. always use devices after sufficient evaluation. application circuit example 4-device application SM3321A gs0 gs1 gs2 vdd vss out nc oen SM3321A gs0 gs1 gs2 vdd vss out nc oen SM3321A gs0 gs1 gs2 vdd vss out nc oen SM3321A gs0 gs1 gs2 vdd vss out nc oen a/d cpu gs0 gs1 gs2 e0 e1 e2 e3 -1 -2 -3 -4 4.7f 4.7f 4.7f 4.7f 4-device application timing diagram light source sensor gs[2:0] e0 e1 e2 e3 out-ic1 led-1 led-2 led-3 led-4 out-ic2 out-ic3 out-ic4 out a/d acq(ex. 5s) 150s 4 = 600s/line 150s led-ir led-r led-g led-b gs v g gs v rgs v bgs v ir a/d a/d a/d a/d a/d a/d a/d a/d a/d a/d a/d a/d a/d a/d a/d a/d 30s 10s
SM3321A seiko npc corporation - 9 please pay your attention to the following points at time of using the products shown in this document. 1. the products shown in this document (hereinafter ?produc ts?) are designed and manufactured to the generally accepted standar ds of reliability as expected for use in general electronic and electrical equipment, such as personal equipment, machine tools and measurement equipment. the products are no t designed and manufactured to be used in any other special equipment requiring extremely high level of reliability and safety, such as aero space equipment, nuclear power control equipment, medical equipment , transportation equipment, disaster prev ention equipment, security equipment. the products are not designed and manufactured to be used for the apparatus that exerts harmful influence on the huma n lives due to the defects, failure or malfunction of the produ cts. if you wish to use the products in that apparatus, please contact our sales section in advance. in the event that the products are used in such apparatus wi thout our prior approval, we assume no responsibility whatsoever for any damages resulting from the use of that apparatus. 2. npc reserves the right to change the specifications of the pr oducts in order to improve the c haracteristics or reliability t hereof. 3. the information described in this document is presented only as a guide for using the products. no responsibility is assumed by us for any infringements of patents or other rights of the third parties whic h may result from its use. no license is granted by implicati on or otherwise under any patents or other rights of the third parties. then, we assume no responsibility whatsoever for any damages resulting from that infringements. 4. the constant of each circuit shown in this document is descri bed as an example, and it is not guaranteed about its value of the mass production products. 5. in the case of that the products in this document falls unde r the foreign exchange and foreign trade control law or other ap plicable laws and regulations, approval of the export to be based on those laws and regulations are necessary. cu stomers are r equested appropriat ely take steps to obtain required permissions or approvals from appropriate government agencies. seiko npc corporation 1-9-9, hatchobori, chuo-ku, tokyo 104-0032, japan telephone: +81-3-5541-6501 facsimile: +81-3-5541-6510 http://www.npc.co.jp/ email:sales@npc.co.jp nd13029-e-01 2015.07
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