SM3321A Optical Sensor IC OVERVIEW The SM3321A is an image sensor IC with a built-in single element photodiode of 0.5mm2. The IC can detect range of light wave from visible to infrared in itself. It is a superior sensor with noise immunity to integrate 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 range of light wave from visible to infrared with high sensitivity. PACKAGE DIMENSIONS (Unit: mm) 2.8±0.1 IC chip 1.65±0.15 Pin No.1 R0.15 0.8×3=2.4 0.25±0.05 B Photodiode （Top View） 1.13±0.2 Photodiode detector dimensions Origin: IC center unit : [mm] X 0.40 0.18 A B 0.6±0.1 0.325±0.1 A 3.05±0.1 ▪ High-sensitivity preamplifier for visible to infrared detection using a single IC ▪ Gain setting and output control function by pin terminal setting (GS0, GS1, GS2, OEN) ▪ Transimpedance range: 2MΩ to 48MΩ ▪ Photodiode detector size: 0.22mm×2.34mm (0.5mm2 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)@VDD=5V, no load ▪ Operating temperature range: -40 to +85°C ▪ Package: 8 pin HCOB 1.525±0.15 FEATURES Package type : 8pin HCOB Package size : 2.8mm×3.05mm Photodiode detector size : 0.22mm×2.34mm (0.5mm2 photo detector surface area) Y 1.17 -1.17 ORDERING INFORMATION Device Package SM3321A 8 pin HCOB TYPICAL APPLICATION CIRCUIT VDD GS2 GS1 GS0 VDD GS2 GS1 4.7μF 4.7μF -4 OEN NC OUT SM3321A VSS -3 OEN NC SM3321A VSS -2 OEN NC OUT SM3321A VSS OEN NC OUT VSS CPU 4.7μF -1 OUT 4.7μF SM3321A GS0 VDD GS2 GS1 GS0 VDD GS2 GS1 GS0 GS2 GS1 GS0 A/D E0 E1 E2 E3 SEIKO NPC CORPORATION - 1 SM3321A PINOUT (Top view) 1 8 GS0 OUT 2 7 GS1 NC 3 6 GS2 OEN 4 5 VDD PD VSS PIN DESCRIPTION No. Name I/O Function 1 VSS S Ground 2 OUT O Analog output 3 NC - 4 OEN IPU 5 VDD S Supply voltage 6 7 GS2 GS1 I I Transimpedance (I/V) amplifier resistance control input Post-amplifier gain control input H: VDD level; L: VSS level H: VDD level; L: VSS level 8 GS0 I Post-amplifier gain control input H: VDD level; L: VSS level Open circuit or VSS level (LOW) Output enable control input Output enabled when LOW. *. S: Power supply, O: Output, I: Input, IPU: Input with pull-up resistance BLOCK DIAGRAM Photodiode IV Amp GC Amp Offset Cancel & Buffer OUT OEN GS0 GS1 GS2 Control logic NC VDD VSS Reference Voltage Source Post Amp SEIKO NPC CORPORATION - 2 SM3321A SPECIFICATIONS Absolute Maximum Ratings VSS=0V Parameter Symbol Condition Rating Unit -0.3 to +7.0 V OEN, GS0, GS1, GS2 pins -0.3 to VDD+0.3 V OUT pin -0.3 to VDD+0.3 V -55 to +90 °C *1 VDD Voltage between VDD and VSS *1*2 VIN Supply voltage Input voltage *1*2 Output voltage VOUT Storage temperature*3 TSTG *1. This parameter rating is the values that must never exceed even for a moment. This product may suffer breakdown if this parameter rating is exceeded. Operation and characteristics are guaranteed only when the product is operated at recommended operating conditions. *2. VDD is a VDD 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. VSS=0V Parameter Supply voltage Symbol VDD Voltage between VDD and VSS OUT output load CL OUT pin Operating temperature Ta *1 Rating Condition Unit MIN TYP MAX 3.0 5.0 5.5 V 80 pF 85 °C -40 *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 operating conditions, this product should be used within this range. Electrical Characteristics DC Characteristics Reference circuit with recommended operating conditions, unless otherwise specified. Parameter Current consumption Input voltage 1 Symbol IDD VIH1 VIL1 Output impedance GS0, GS1, GS2, OEN pins GS0, GS1, GS2 pins VIH=VDD applied voltage IIL1 GS0, GS1, GS2 pins VIL=0V applied voltage IIH2 OEN pin, VDD=5.0V, VIH=VDD applied voltage IIL2 OEN pin, VDD=5.0V, VIL=0V applied voltage Input current 2 Rating MIN OEN=VDD input, OUT output no load IIH1 Input current 1 OUT output voltage Condition VOH TYP MAX 1 2 0.7VDD 0.3VDD V μA -1 1 μA -40 -20 -5 0.9VDD 0.05 OUT pin*2 mA 1 VOL ZO Unit 0.4 1 V kΩ *1. The output impedance ZO is given by the following equation, where V10 is the output voltage for 10kΩ load resistance and V0 is the output voltage with no load. ZO = (V0/V10-1) ×10 [kΩ] SEIKO NPC CORPORATION - 3 SM3321A Photodiode Characteristics Ta=25°C, Reference circuit with recommended operating conditions, unless otherwise specified Parameter Rating TYP MAX Symbol Conditions Spectral range of responsivity 1 λ1 S=50% of S4 570 940 nm Spectral range of responsivity 2 λ2 S=30% of S4 470 570 nm S1 S2 S3 S4 S5 470nm 570nm 630nm 865nm 940nm *1 Photodiode responsivity 1 Photodiode responsivity 2*1 Photodiode responsivity 3*1 Photodiode responsivity 4*1 Photodiode responsivity 5*1 MIN 0.22 0.37 0.42 0.50 0.35 Unit A/W A/W A/W A/W A/W *1. Typical characteristics determined on actual device Photodiode responsivity spectral response 0.6 Responsivity [A/W] 0.5 0.4 measurements (TYP sample) 0.3 theoretical value 0.2 0.1 0.0 400 500 600 700 800 900 1000 Wavelength [nm] Photodiode spectral responsivity SEIKO NPC CORPORATION - 4 SM3321A Analog Electrical Characteristics Reference circuit with recommended operating conditions, unless otherwise specified Parameter Symbol Rating Conditions Unit MIN TYP MAX GS2=0V input 0.4 0.5 0.6 MΩ GS2=VDD input 2.4 3 3.6 MΩ -1 1 dB Pre-amplifier transimpedance Rti Post-amplifier gain differential Gdiff Gain differential relative to GS[2:0] gain settings VOD1 VDD=5.0V, Ta=25°C 20 mV VOD2 VDD=5.0V, Ta=85°C 50 mV Dark voltage AC Characteristics Reference circuit with recommended operating conditions, unless otherwise specified Parameter Symbol Conditions TYP MAX Unit tst1 80pF OUT output load, Time for output to reach 95% amplitude*1 GS2=0V (Transimpedance: 2MΩ,3.2 MΩ,5 MΩ,8 MΩ) 5 10 μs Settling time2 tst2 80pF OUT output load, Time for output to reach 95% amplitude*1 GS2= VDD (Transimpedance: 12MΩ,19.2 MΩ,30 MΩ,48 MΩ) 18 30 μs Output voltage stabilization time*2 tw ≤ 5% output variation*1 1000 μs Output disable time*3 tz OUT Interface wait time tsi ― CI OEN, GS0, GS1, GS2 CO OUT Settling time1 Input capacitance*4 *4 Output capacitance MIN 0.1 10 μs μs 3 pF 3.5 pF *1. OUT output presumed to reach reference value 100μs 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. OEN 0.5VDD tst1, tst2 0.5VDD tW 100μs 95% 0.5VDD tsi tZ 100% 100±5% OUT AC characteristics SEIKO NPC CORPORATION - 5 SM3321A Light source LED LED Sensor GS[2:0] GS OEN OUT tst2 > 30μs A/D A/D A/D ACQ tsi > 10μs Settling time Interface wait time Timing diagram FUNCTIONAL DESCRIPTION Transimpedance Setting The I/V amplifier impedance and post-amplifier gain can be selected 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 GS2 GS1 GS0 L L L L L H L H L L H H I/V amplifier resistance Post-amplifier gain Transimpedance 12dB 2.0MΩ 16dB 3.2MΩ 20dB 5.0MΩ H 24dB 8.0MΩ L L 12dB 12MΩ H L H 16dB 19.2MΩ H H L 20dB 30MΩ H H H 24dB 48MΩ 0.5MΩ 3MΩ OUT Output Setting The OUT output can be controlled using the OEN input. OEN input OUT output L Output enabled H Hi-Z SEIKO NPC CORPORATION - 6 SM3321A REFERENCE CIRCUIT VDD GS2 GS1 GS0 GS2 GS1 GS0 4.7μF OEN NC VSS OUT SM3321A CPU A/D OEN Connect a laminated ceramic capacitor of 4.7μF 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. SEIKO NPC CORPORATION - 7 SM3321A TYPICAL APPLICATION CIRCUIT The typical application circuits are provided for reference only, and do not represent a guarantee of circuit operation. We accept no liability for any damage resulting from the use of these circuits. Always use devices after sufficient evaluation. Application Circuit Example 4-device application GS2 VDD GS1 GS0 VDD GS2 4.7μF -4 OEN NC SM3321A OUT NC VSS 4.7μF -3 OEN SM3321A OUT -2 OEN NC VSS OUT SM3321A OEN NC OUT VSS CPU 4.7μF -1 VSS 4.7μF SM3321A GS1 GS0 VDD GS2 GS1 GS0 VDD GS2 GS1 GS0 GS2 GS1 GS0 A/D E0 E1 E2 E3 4-device application timing diagram Light source LED-R LED-G LED-B LED-IR LED-1 LED-2 LED-3 LED-4 Sensor GS[2:0] GSｰR GSｰG GSｰB GSｰIR E0 E1 E2 E3 OUT-IC1 OUT-IC2 OUT-IC3 30µs A/D ACQ(ex. 5µs) 150µs 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 OUT A/D OUT-IC4 10µs 150µs × 4 = 600µs/line SEIKO NPC CORPORATION - 8 SM3321A 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 ”Products”) are designed and manufactured to the generally accepted standards of reliability as expected for use in general electronic and electrical equipment, such as personal equipment, machine tools and measurement equipment. The Products are not designed and manufactured to be used in any other special equipment requiring extremely high level of reliability and safety, such as aerospace equipment, nuclear power control equipment, medical equipment, transportation equipment, disaster prevention equipment, security equipment. The Products are not designed and manufactured to be used for the apparatus that exerts harmful influence on the human lives due to the defects, failure or malfunction of the Products. 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 without 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 Products in order to improve the characteristics or reliability thereof. 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 which may result from its use. No license is granted by implication 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 described 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 under the foreign exchange and foreign trade control law or other applicable laws and regulations, approval of the export to be based on those laws and regulations are necessary. Customers are requested appropriately 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:[email protected] ND13029-E-01 2015.07 SEIKO NPC CORPORATION - 9