Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR General Description Features 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 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 Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Pin Configuration K Package (SOT-23-5) INPUT- 1 GND 2 INPUT+ 3 5 VCC 4 OUTPUT Figure 2. Pin Configuration of AS331 (Top View) Functional Block Diagram VCC 5 INPUT+ INPUT- 3 Q2 Q3 Q1 Q4 4 1 OUTPUT Q8 Q7 Q6 Q5 GND 2 Figure 3. Functional Block Diagram of AS331 Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 2 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Ordering Information AS331 E1: Lead Free G1: Green Circuit Type TR: Tape and Reel Package K: SOT-23-5 Package Temperature Range SOT-23-5 -40 to 85oC Part Number Lead Free AS331KTR-E1 Green AS331KTR-G1 Marking ID Lead Free EEA Packing Type Green GEA Tape & Reel 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 Symbol Value Unit Supply Voltage VCC 40 V Differential Input Voltage VID 40 V Input Voltage VIN -0.3 to 40 V Input Current (VIN<-0.3V) (Note 2) IIN 50 mA Output Short-circuit Current to Ground Continuous Power Dissipation (TA=25oC) PD 620 Operating Junction Temperature TJ 150 o TSTG -65 to 150 o TLEAD 260 Storage Temperature Lead Temperature (Soldering, 10sec) mW 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). Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 3 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Recommended Operating Conditions Parameter Supply Voltage Operating Ambient Temperature Range Symbol Min Max Unit VCC 2 36 V TA -40 85 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 Symbol VOS Conditions Min VOUT=1.4V, VCC=5 to 30V IB IIN+ or IIN- with output in linear range, VCM=0V Input Offset Current IIO IIN+-IIN-, VCM=0V Supply Current 1 5 25 250 400 5 50 200 VCC=30V ICC Max 7.0 Input Bias Current Input Common Mode Voltage Range (Note 4) Typ VCC-1.5 0 VCC=5V 0.4 VCC=30V 0.5 mV nA nA V 1.0 2.0 RL=∞ Unit 1.7 mA 3.0 Voltage Gain GV VCC=15V, RL≥15kΩ, VOUT=1 to 11V 50 200 V/mV Large Signal Response Time VIN =TTL Logic Swing, RL=5.1kΩ 200 ns Response Time RL=5.1kΩ 1.3 µs 16 mA 0.1 nA Output Sink Current ISINK Output Leakage Current ILEAK Saturation Voltage VSAT VIN-=1V, VIN+=0V, VOUT=1.5V VIN-=0V, VIN+=1V, VOUT=5V 6.0 VIN-=0V, VIN+=1V, VOUT=30V VIN-=1V, VIN+=0V, ISINK≤4mA 1 200 400 500 µA mV Note 3: These specifications are limited to -40oC≤TA≤85oC. 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 +36V without damages, independent of the magnitude of the VCC. Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 4 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Typical Performance Characteristics 0.60 0.6 VCC=5V 0.55 VCC=30V Supply Current (mA) Supply Current (mA) 0.5 0.4 0.3 0.2 o TC=-40 C 0.45 0.40 0.35 0.30 o TC=25 C 0.1 0.50 o TC=85 C 0.25 0.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0.20 -40 30 -20 0 60 80 100 120 Case Temperature ( C) Figure 4. Supply Current vs. Supply Voltage Figure 5. Supply Current vs. Case Temperature 350 RL=5.1KΩ VCC=5V VCC=5V 1.0 VCC=30V 0.9 Saturation Voltage (mV) Input Offset Voltage (mV) 40 o Supply Voltage (V) 1.1 20 0.8 0.7 0.6 300 ISINK=4mA 250 200 150 0.5 0.4 -40 -20 0 20 40 60 80 100 100 -40 120 -20 0 20 40 60 80 100 120 o o Case Temperature ( C) Case Temperature ( C) Figure 6. Input Offset Voltage vs. Case Temperature Figure 7. Saturation Voltage vs. Case Temperature Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 5 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Typical Performance Characteristics (Continued) 6 600 VCC=5V o VCC=5V, Input Overdrive Voltage=100mV Low to High High to Low 550 TC=25 C Response Time (nS) Saturation Voltage (V) 5 4 3 2 500 450 400 350 300 1 250 0 0 2 4 6 8 10 12 14 16 18 20 200 -40 22 -20 0 20 40 60 80 100 120 o Case Temperature ( C) Output Sink Current (mA) Figure 9. Response Time vs. Case Temperature Figure 8. Saturation Voltage vs. Output Sink Current 2.0 900 VCC=5V,GND=0V, RL=5.1KΩ 1.8 Input Overdrive Voltage=100mV Response Time (nS) Response Time (nS) RL=5.1KΩ 1.6 800 700 600 Low to High High to Low 500 VCC=5V, GND=0V 1.4 1.2 1.0 Low to High High to Low 0.8 0.6 400 300 0.4 0.2 0 20 40 60 80 100 120 140 0 20 40 60 80 100 Input OverdrIve Voltage (mV) Load Capacitor (pF) Figure 10. Response Time vs. Load Capacitor Figure 11. Response Time vs. Input Overdrive Voltage Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 6 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Typical Performance Characteristics (Continued) 1.8 1.8 RL=5.1KΩ 1.6 Input Overdrive Voltage=100mV 1.4 Response Time (nS) Response Time (nS) 1.4 1.2 Low to High High to Low 1.0 0.8 0.6 1.2 1.0 0.6 0.4 0.2 0.2 0.0 0 5 10 15 20 25 30 0 5 10 15 20 25 30 Supply Voltage (V) Supply Voltage (V) Figure 13. Response Time vs. Supply Voltage Figure 12. Response Time vs. Supply Voltage 20mV Low to High High to Low 0.8 0.4 0.0 RL=5.1KΩ 1.6 Input Overdrive Voltage=5mV 10mV 5mV Output 100mV 20mV 10mV Input Overdrive Voltage=5mV Input Input Output Input Overdrive Voltage=100mV VCC=5V, RL=5.1KΩ VCC=5V, RL=5.1KΩ Figure 15. Response Time for Negative Transition Figure 14. Response Time for Positive Transition Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 7 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Typical Performance Characteristics (Continued) Input VCC=15V Output VCC=5V Output VCC=5V Input Output Input Overdrive Voltage=100mV Input Overdrive Voltage=100mV Figure 17. Response Time for Negative Transition Figure 16. Response Time for Positive Transition Input Input VCC=5V, RL=5.1KΩ VCC=5V, RL=5.1KΩ Output VCC=15V Output Input Overdrive Voltage=5mV Input Overdrive Voltage=100mV Figure 19. 100kHz Response Figure 18. 100kHz Response Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 8 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Typical Performance Characteristics (Continued) Input VCC=5V, RL=5.1KΩ Output Input Overdrive Voltage=100mV Figure 20. 500kHz Response Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 9 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Typical Application VCC 5V VIN+ 3KΩ VIN+ + 100KΩ + VOUT AS331 VOUT AS331 - VREF+ - VREF+ Figure 22. Driving CMOS Figure 21. Basic Comparator VCC VCC 4.3KΩ 100KΩ 1MΩ 10KΩ 100pF VIN+ 75pF - - 1MΩ AS331 VOUT VOUT AS331 + + 100KΩ 100KΩ 0.001µF VIN 100KΩ 1MΩ Figure 24. Squarewave Oscillator Figure 23. One Shot Multivibrator Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 10 Data Sheet LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331 Mechanical Dimensions SOT-23-5 Unit: mm(inch) 0.300(0.012) 0.600(0.024) 1.500(0.059) 1.700(0.067) 0.100(0.004) 0.200(0.008) 2.950(0.116) 2.650(0.104) 2.820(0.111) 3.020(0.119) 0.200(0.008) 0.700(0.028) REF 0.300(0.012) 0.400(0.016) 0° 8° 1.800(0.071) 2.000(0.079) 0.000(0.000) MAX 1.450(0.057) 0.950(0.037) TYP 0.100(0.004) 0.900(0.035) 1.300(0.051) Oct 2009 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 11 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. 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