Quad voltage comparator

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Ann Cross
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1 AU9 DESCRIPTION The AU9 consists of four independent precision voltage comparators, with an offset voltage specification as low as.mv max for each comparator, which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. These comparators also have a unique characteristic in that the input commonmode voltage range includes ground, even though they are operated from a single power supply voltage. The AU9 was designed to directly interface with TTL and CMOS. When operated from both plus and minus power supplies, the AU9 will directly interface with MOS logic where their low power drain is a distinct advantage over standard comparators. PIN CONFIGURATION D, N Packages OUTPUT OUTPUT V INPUT INPUT INPUT INPUT TOP VIEW OUTPUT OUTPUT GND INPUT INPUT INPUT INPUT FEATURES Wide single supply voltage range.vdc to VDC or dual supplies ±.VDC to ±8VDC Very low supply current drain (.8mA) independent of supply voltage (.mw/comparator at.vdc) Low input biasing current na Low input offset current ±na and offset voltage Input commonmode voltage range includes ground Differential input voltage range equal to the power supply voltage Low output mv at ma saturation voltage Output voltage compatible with TTL, DTL, ECL, MOS and CMOS logic systems APPLICATIONS A/D converters Wide range VCO MOS clock generator High voltage logic gate Multivibrators EQUIVALENT CIRCUIT INPUT INPUT Q V.µA µa.µa µa Q Q Q Q Q (One Comparator Only) Q7 Q8 OUTPUT ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # Pin Plastic Small Outline (SO) Package C to C AU9D 7D Pin Plastic Dual In-Line Package (DIP) C to C AU9N B August,

2 AU9 ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER RATING UNIT V CC V CC supply voltage or ±8 V DC V DIFF Differential input voltage V DC V IN Input voltage. to V DC P DMAX Maximum power dissipation, T A = C (stillair) N package mw D package mw Output shortcircuit to ground Continuous I IN Input current (V IN <.V DC ) ma T A Operating temperature range AU9 to C T STG Storage temperature range to C T SOLD Lead soldering temperature (sec max) C. Derate above C, at the following rates: N Package at.mw/ C D Package at 8.mW/ C. Short circuits from the output to V can cause excessive heating and eventual destruction. The maximum output current is approximately ma independent of the magnitude of V.. This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collectorbase 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 reestablish when the input voltage, which was negative, again returns to a value greater than.v DC. August, 99 9

3 AU9 ELECTRICAL CHARACTERISTICS V=V DC, AU9: C, T A C, unless otherwise specified. SYMBOL PARAMETER TEST CONDITIONS S Input offset voltage V CM Input commonmode voltage range V IDR Differential input voltage V s IN V DC Keep all (or V if need) I BIAS Input bias current linear range I IN() or I IN() with output in AU9 Min Typ Max ±. ±9 ±7. ± V. V. UNIT mv V V V na I IN() I IN() I OS Input offset current ± ± na I OL Output sink current.v DC, ± ± na V IN() V DC, V IN () =,. ma V IN() V DC, V IN () = = V DC, I OH Output leakage current. na I CC A V L t LSR Supply current Voltage gain Saturation voltage Largesignal response time = V DC,. µa R L = on comparators, V = V.8... R L kω, V = V DC V/mV V IN() V DC, V IN() =, I SINK ma V IN = TTL logic swing, V REF =.V DC, V RL = V DC, R L =.kω, t R Response time V RL = V DC, R L =.kω, 7 ma mv ns. µs. Positive excursions of input voltage may exceed the power supply level by 7V. As long as the other voltage remains within the commonmode range, the comparator will provide a proper output state. The low input voltage state must not be less than.v DC (or.v DC below the magnitude of the negative power supply, if used).. At output switch point,.v DC, R S =Ω with V from V DC to V DC ; and over the full input commonmode range (V DC to V.V DC ).. The input commonmode voltage or either input signal voltage should not be allowed to go negative by more than.v. The upper end of the commonmode voltage range is V.V, but either or both inputs can go to V DC without damage.. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output so no loading change exists on the reference or input lines.. The response time specified is for a mv input step with a mv overdrive. For larger overdrive signals, ns can be obtained (see Typical Performance Characteristics section). August, 99 9

4 AU9 EQUIVALENT CIRCUIT V V 7kΩ VC FREQUENCY CONTROL VOLTAGE INPUT kω.µf pf kω.kω.µf V / /AU9.kΩ OUTPUT kω kω kω OUTPUT V / V = V DC m V DC < V C V DC 7H < f O = khz TwoDecade HighFrequency VCO V (V DC ) V REF HI V IN R S R S KΩ LAMP V DC R S N V REF LOW Limit Comparator V REF k V DC V DC V REF k V DC V REF.V DC V DC KΩ TTLtoMOS Logic Converter o -V V V REF k V DC.µF kω kω.kω V V REF k kω CRYSTAL khz Visible Voltage Indicator CrystalControlled Oscillator NOTE: Input of unused comparators should be grounded. August, 99 9

5 AU9 TYPICAL PERFORMANCE CHARACTERISTICS I SUPPLY CURRENT ma Supply Current Input Current Output Saturation Voltage T A = 8 -o C T A = o C T A = o C T A = 7o C T A = o C R L V SUPPLY VOLTAGE V DC I N INPUT CURRENT na DC T A = o C T A = o C T A = o C V IN (CM) = V DC R IN (CM) = kω T A = o C T A = 7o C v SUPPLY VOLTAGE V DC SATURATION VOLTAGE (V DC )... OUT OF SATURATION T A = o C T A = o T A = o C.... I O OUTPUT SINK CURRENT (ma) OUTPUT VOLTAGE mv Response Time for Various Input Overdrives Negative Transition mv mv = INPUT OVERDRIVE V mv V IN.K UT OUTPUT VOLTAGE mv Response Time for Various Input Overdrives Positive Transition INPUT OVERDRIVE = mv mv mv V INPUT VOLTAGE V IN mv OVERDRIVE.... TIME µ sec T A = o C INPUT VOLTAGE V IN mv V IN T A = o C OVERDRIVE UT.... TIME µ sec.k August, 99 9

LM193A/293/A/393/A/2903 Low power dual voltage comparator

LM193A/293/A/393/A/2903 Low power dual voltage comparator INTEGRATED CIRCUITS Supersedes data of 2002 Jan 22 2002 Jul 12 DESCRIPTION The LM193 series consists of two independent precision voltage comparators with an offset voltage specification as low as 2.0