LM393

LM393 Dual Differential Comparator DUAL DIFFERENTIAL COMPARATORS The LM393 dual differential comparator is made up of two voltage comparators that operate using the same power supply. THe supply voltage can range from 2 to 36 volts. Dual supplies can also be used as long as the difference between them is 2 to 36 volts. The LM393 is designed to operate at a temperature range of 0oC to 70oC. FEATURES l l l l l l l Single or dual supplies 2 to 36 V Supply Low Input Bias Current Low Input Offset Voltage Low Input Offset Current Low Supply Current Drain Output Compatible with TTL, MOS, and CMOS PIN ARRANGEMENT 8 DIP LM393CD 8 SOP LM393CS ABSOLUTE MAXIMUM RATINGS Item Power Supply Voltage Input Differential Voltage Range Input Common Mode Voltage Range Output Short Circuit-to-Ground Output Sink Current (1) Power Dissipation @ 25oC Derate above 25oC Operating Ambient Temperature Range Operating Junction Temperature Storage Temperature Range Symbol VCC VIDR VICR ISC ISink PD 1/RθJA TA TJ TS Rating +36 or +18 36 -0.3 to +36 Continuous 20 570 5.7 0 to 70 125 -65 to 150 Unit V V V mA mW mW/oC o o o C C C Notes: 1. The max. output current may be as high as 20 mA, independent of the magnitude of VCC , output short circuits to VCC can cause excessive heating and eventual destruction. 2. At output switch point, V O = 1.4 Vdc, RS = 0 Ω with VCC from 5.0 Vdc to 30 Vdc, and over the full input common mode range (0V to VCC = –1.5V). 3. Due to the PNP transistor inputs, bias current will flow out of the inputs. This current is essentially constant, independent of the output state, therefore, no loading changes will exist on the input lines. 4. Input common mode of either input should not be permitted to go more than 0.3V negative of ground or minus supply. The upper limit of common mode range is VCC –1.5V. 5. Response time is specified with a 100mV step and 5.0mV of overdrive. With larger magnitudes of overdrive faster response times are obtainable. 6. The comparator will exhibit proper output state if one of the inputs becomes greater than V CC , the other input must remain within the common mode range. The low input state must not be less than –0.3V of ground or minus supply. 5-16 LM393 Dual Differential Comparator ELECTRICAL CHARACTERISTICS VCC = 5.0Vdc, 0oC < TA < 70oC (unless otherwise noted) Item Symbol Input Offset Voltage (2) VIO TA = 25oC 0oC < TA < 70oC Input Offset Current IIO TA = 25oC 0oC < TA < 70oC Input Offset Current (3) IIB TA = 25oC 0oC < TA < 70oC Input Common Mode Voltage Range (3) VICR TA = 25oC 0oC < TA < 70oC Voltage Gain AVOL RL > 15K, VCC = 15 Vdc TA = 25oC Large Signal Response Time --Vin = TTL Logic Swing. Vref = 1.4 Vdc VRL = 5.0 Vdc, RL = 5.1K TA = 25oC Response Time (5) tTLH VRL = 5.0 Vdc, RL = 5.1K TA = 25oC Input Differential Voltage (6) VID All Vin > GND or V-Supply (if used) Output Sink Current ISink Vin- > 1.0 Vdc, Vin+ = 0 Vdc Vo < 1.5 Vdc, TA = 25oC Output Saturation Voltage VOL Vin- > 1.0 Vdc, Vin+ = 0 Vdc ISink < 4.0 mA, TA = 25oC o 0 C < TA < 70oC Output Leakage Current IOL Vin- = 0 Vdc, Vin+ > 1.0 Vdc Vo = 5.0 Vdc, TA = 25oC Vin- = 0 Vdc, Vin+ > 1.0 Vdc Vo = 30 Vdc, 0oC < TA < 70oC Supply Current LCC RL = , TA = 25oC RL = , VCC = 30 V 8 8 Min ------------0 0 50 Typ 1.0 --5.0 --25 ------200 Max 5.0 9.0 Unit mV nA 50 150 nA 250 400 V VCC-1.5 VCC-2.0 --V/mV --- 300 --- ns --- 13 --- µs --- --- VCC --- V 6.0 16 mA mV --------150 --0.1 --400 700 nA --1000 mA ----0.4 --1.0 2.5 LM393 Dual Differential Comparator CIRCUIT SCHEMATIC (Diagram shown is for 1 comparator) Input Bias Current (nA) Satuuration Voltage (Vdc) Output Sink Current (mA) Supply Current (mA) Supply Voltage (Vdc) Supply Voltage (Vdc) 5-18 LM393 Dual Differential Comparator APPLICATIONS INFORMATION These dual comparators feature high gain, wide bandwidth characteristics. This gives the device oscillation tendencies if the outputs are capacitively coupled to the inputs via stray capacitance. This oscillation manifests itself during output transitions (VOL to VOH ). To alleviate this situation, input resistors