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| Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR General Description The AS331 consists of a single precision voltage comparator with a typical input offset voltage of 1.0mV and high voltage gain. It is specifically designed to operate from a single power supply over wide range of voltages. Operation from split power supply is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. The AS331 is available in standard SOT-23-5 package. * * * AS331 Features * Wide Supply Voltage Range - Single Supply: 2V to 36V - Dual Supplies: 1V to 18V Low Supply Current at VCC=5V: 0.4mA Low Input Bias Current: 25nA (Typical) Low Input Offset Current:5nA (Typical) Low Input Offset Voltage: 1mV (Typical) Input Common Mode Voltage Range Includes Ground Differential Input Voltage Range Equals to the Power Supply Voltage Low Output Saturation Voltage at 4mA: 200mV (Typical) Open Collector Output * * * * * Applications * * * * * * Battery Charger Cordless Telephone Switching Power Supply DC-DC Module PC Motherboard Communication Equipment SOT-23-5 Figure 1. Package Type of AS331 Aug. 2008 Rev. 1. 1 1 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Pin Configuration K Package (SOT-23-5) AS331 INPUTGND INPUT+ 1 2 3 5 VCC 4 OUTPUT Figure 2. Pin Configuration of AS331 (Top View) Functional Block Diagram VCC 5 INPUT+ 3 1 Q2 Q1 Q3 Q4 4 Q8 Q7 OUTPUT INPUT- Q5 GND Q6 2 Figure 3. Functional Block Diagram of AS331 Aug. 2008 Rev. 1. 1 2 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Ordering Information AS331 Circuit Type Package K: SOT-23-5 Temperature Range -40 to 85oC Part Number Lead Free AS331KTR-E1 Green AS331KTR-G1 Marking ID Lead Free EEA Green GEA Packing Type Tape & Reel AS331 E1: Lead Free G1: Green TR: Tape and Reel Package SOT-23-5 BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green package. Absolute Maximum Ratings (Note 1) Parameter Supply Voltage Differential Input Voltage Input Voltage Input Current (VIN<-0.3V) (Note 2) Output Short-circuit Current to Ground Power Dissipation (TA=25oC) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10sec) PD TJ TSTG TLEAD Symbol VCC VID VIN IIN Value 40 40 -0.3 to 40 50 Continuous 620 150 -65 to 150 260 mW o o Unit V V V mA C C oC Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 2: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action on the IC chip. This transistor action can cause the output voltages of the comparators to go to the V+ voltage level (or to ground for a large overdrive) for the time duration that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns to a value greater than -0.3V (at 25oC). Aug. 2008 Rev. 1. 1 3 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Recommended Operating Conditions Parameter Symbol Min Max Unit AS331 Supply Voltage Operating Ambient Temperature Range VCC TA 2 -40 36 85 V o C Electrical Characteristics VCC=5V, GND=0V, TA=25oC, unless otherwise specified. Bold typeface applies over TA=-40 to 85oC (Note 3) Parameter Input Offset Voltage Input Bias Current Input Offset Current Input Common Mode Voltage Range (Note 4) Symbol VOS IB IIO Conditions VOUT=1.4V, VCC=5 to 30V IIN+ or IIN- with output in linear range, VCM=0V IIN+-IIN-, VCM=0V VCC=30V VCC=5V Supply Current ICC RL= VCC=30V 50 0 0.4 0.5 Min Typ 1 25 5 Max 5 7.0 250 400 50 200 VCC-1.5 1.0 2.0 1.7 3.0 Voltage Gain Large Signal Response Time Response Time Output Sink Current Output Leakage Current ISINK ILEAK VSAT GV VCC=15V, RL15k, VOUT=1 to 11V VIN =TTL Logic Swing, RL=5.1k RL=5.1k VIN-=1V, VIN+=0V, VOUT=1.5V VIN-=0V, VIN+=1V, VOUT=5V VIN-=0V, VIN+=1V, VOUT=30V VIN-=1V, VIN+=0V, ISINK4mA 200 6.0 200 200 1.3 16 0.1 1 400 500 V/mV ns s mA nA A mV mA Unit mV nA nA V Saturation Voltage Note 3: These specifications are limited to -40oCTA85oC. Limits over temperature are guaranteed by design, but not tested in production. Note 4: The input common mode voltage of either input signal voltage should not be allowed to go negatively by more than 0.3V (at 25oC). The upper end of the common mode voltage range is VCC-1.5V (at 25oC), but either or both inputs can go to 18V without damages, independent of the magnitude of the VCC. Aug. 2008 Rev. 1. 1 4 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Typical Performance Characteristics AS331 0.60 0.6 0.55 VCC=5V 0.5 VCC=30V Supply Current (mA) 0.50 0.45 0.40 0.35 0.30 0.25 0.20 -40 Supply Current (mA) 0.4 0.3 0.2 TC=-40 C 0.1 o TC=25 C TC=85 C o o 0.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 -20 0 20 40 60 o 80 100 120 Supply Voltage (V) Case Temperature ( C) Figure 4. Supply Current vs. Supply Voltage Figure 5. Supply Current vs. Case Temperature 1.1 RL=5.1K 350 Input Offset Voltage (mV) 1.0 0.9 0.8 0.7 0.6 0.5 0.4 -40 -20 0 20 40 60 o VCC=5V VCC=5V ISINK=4mA Saturation Voltage (mV) VCC=30V 300 250 200 150 80 100 120 100 -40 -20 0 20 40 60 o 80 100 120 Case Temperature ( C) Case Temperature ( C) Figure 6. Input Offset Voltage vs. Case Temperature Figure 7. Saturation Voltage vs. Case Temperature Aug. 2008 Rev. 1. 1 5 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Typical Performance Characteristics (Continued) AS331 6 600 VCC=5V 5 VCC=5V, Input Overdrive Voltage=100mV Low to High High to Low TC=25 C o 550 Saturation Voltage (V) 4 Response Time (nS) 500 450 400 350 300 3 2 1 250 0 0 2 4 6 8 10 12 14 16 18 20 22 200 -40 -20 0 20 40 60 o 80 100 120 Output Sink Current (mA) Case Temperature ( C) Figure 8. Saturation Voltage vs. Output Sink Current Figure 9. Response Time vs. Case Temperature 2.0 900 VCC=5V,GND=0V, RL=5.1K Input Overdrive Voltage=100mV 1.8 1.6 VCC=5V, GND=0V RL=5.1K 800 Response Time (nS) Response Time (nS) 1.4 1.2 1.0 0.8 0.6 700 600 Low to High High to Low 500 Low to High High to Low 400 0.4 0.2 0 20 40 60 80 100 120 140 0 20 40 60 80 100 300 Load Capacitor (pF) Input OverdrIve Voltage (mV) Figure 10. Response Time vs. Load Capacitor Figure 11. Response Time vs. Input Overdrive Voltage Aug. 2008 Rev. 1. 1 6 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Typical Performance Characteristics (Continued) AS331 1.8 1.6 1.4 1.8 RL=5.1K Input Overdrive Voltage=5mV 1.6 1.4 RL=5.1K Input Overdrive Voltage=100mV Response Time (nS) Response Time (nS) 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 5 10 15 20 25 30 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 5 10 15 20 25 30 Low to High High to Low Low to High High to Low Supply Voltage (V) Supply Voltage (V) Figure 12. Response Time vs. Supply Voltage Figure 13. Response Time vs. Supply Voltage 20mV Input 10mV 5mV Output 100mV 20mV 10mV Input Overdrive Voltage=5mV Output Input Overdrive Voltage=100mV VCC=5V, RL=5.1K Input VCC=5V, RL=5.1K Figure 14. Response Time for Positive Transition Figure 15. Response Time for Negative Transition Aug. 2008 Rev. 1. 1 7 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Typical Performance Characteristics (Continued) AS331 Input VCC=15V VCC=5V Output Input Overdrive Voltage=100mV Output VCC=15V VCC=5V Output Input Input Overdrive Voltage=100mV Figure 16. Response Time for Positive Transition Figure 17. Response Time for Negative Transition Input Input VCC=5V, RL=5.1K VCC=5V, RL=5.1K Output Input Overdrive Voltage=5mV Output Input Overdrive Voltage=100mV Figure 18. 100kHz Response Figure 19. 100kHz Response Aug. 2008 Rev. 1. 1 8 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Typical Performance Characteristics (Continued) AS331 Input VCC=5V, RL=5.1K Output Input Overdrive Voltage=100mV Figure 20. 500kHz Response Aug. 2008 Rev. 1. 1 9 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Typical Application AS331 VCC 5V 3K VIN+ + VIN+ + AS331 100K VOUT AS331 VREF+ - VOUT VREF+ - Figure 21. Basic Comparator Figure 22. Driving CMOS VCC VCC 4.3K 1M 100pF VIN+ 1M AS331 + VOUT 100K 10K 75pF AS331 + 0.001F VOUT 100K VIN 100K 1M 100K Figure 23. One Shot Multivibrator Figure 24. Squarewave Oscillator Aug. 2008 Rev. 1. 1 10 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR Mechanical Dimensions SOT-23-5 Unit: mm(inch) AS331 2.820(0.111) 3.020(0.119) 0.100(0.004) 0.200(0.008) 2.650(0.104) 2.950(0.116) 1.500(0.059) 1.700(0.067) 0.200(0.008) 0.700(0.028) REF 0.950(0.037) TYP 0.300(0.012) 0.400(0.016) 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.600(0.024) 0 8 1.050(0.041) 1.250(0.049) 0.000(0.000) 0.100(0.004) 1.050(0.041) 1.150(0.045) Aug. 2008 Rev. 1. 1 11 BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE - Headquarters BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Limited Tel: +86-21-24162266, Fax: +86-21-24162277 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 REGIONAL SALES OFFICE Shenzhen Office REGIONAL SALES OFFICE - Wafer Fab BCD Semiconductor Manufacturing Limited Shanghai Design Group - IC SIM-BCD Semiconductor Manufacturing Co., Ltd. 800 Yi Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 900, Yi Shan Road, Shanghai 200233, China 8F, Zone B, 1491, Fax: +86-21-5450 0008 Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 USA Office BCD Semiconductor Corp. USA Office 30920 Huntwood Ave. Hayward, BCD Semiconductor Corporation CA 94544, USA 30920 Huntwood Ave. Hayward, Tel 94544, U.S.A CA : +1-510-324-2988 Fax: +1-510-324-2788 Tel : +1-510-324-2988 Fax: +1-510-324-2788 Taiwan Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office BCD Taiwan Office (Taiwan) Company Limited Semiconductor Shenzhen Office Room E, SIM-BCD Semiconductor 3rd Fuzhong Road, Futian District, Shenzhen, 4F, 298-1, Rui Guang Road,(Taiwan) Company Limited Shanghai 5F, Noble Center, No.1006,Manufacturing Co., Ltd. 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