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New ECG834 NTE834 - quad input voltage comp. - lot of 5


Low Power, Low Offset Voltage Comparator
The NTE834 and NTE834SM are precision voltage comparators designed 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 common-mode voltage range inclides GND, even though operated from a single power supply voltage.
* Wide Single Supply Voltage Range: 2V to 36V
* Very Low Supply Current Drain: 0.8mA Typ
* Low Input Biasing Current: 25nA
* Output Voltage Compatible with TTL, DTL, ECL, MOS, and CMOS Logic Systems
* Available in Standard 14-Lead DIP (NTE834) and Surface Mount SOIC-14 (NTE834SM)
* Simple Analog to Digital Converters
* Pulse, Squarewave, and Time Delay Generators
Power Dissipation (Note 1), PD
Output Short-Circuit to GND (Note 2)
Input Current (VIN < -0.3V, Note 3)
Operating Temperature Range, Topr
Storage Temperature Range, Tstg
Lead Temperature (During Soldering, 10sec), TL
For operating at high temperatures, these devices must be derated based on a +125°C maximum junction temperature and a thermal resistance of +175°C/W which applies for the device soldered to a printed circuit board, operating in ambient still air. The low bias dissipation and the "ON-OFF" characteristic of the outputs keeps the chip dissipation very low (PD Short circuits from the output to V+ can cause excessive heating and eventual destruction. The maximum output current is approximately 20mA 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 collector-base junction of the input PNP transistors becoming forward biased and thereby acting as input diode clamps.
Electrical Characteristics: (V+ = 5V, -55° IIN(+) or IIN(-) with Output in Linear Range, TA = +25°C, Note 5
IIN(+) or IIN(-) with Output in Linear Range
Input Common-Mode Voltage Range
RL = Infinity on All Comparators, TA = +25°C
RL >/= 15k Ohm, V+ = 15V (To Support Large VO Swing), TA = +25°C
VIN = TTL Logic Swing, VREF = 1.4V, VRL = 5V, RL = 5.1k Ohm, TA = +25°C
VRL = 5V, RL = 5.1K Ohm, TA = +25°C
VIN(-) >/= 1V, VIN(+) = 0, VO VIN(-) >/= 1V, VIN(+) = 0, ISINK VIN(-) >/= 1V, VIN(+) = 0, VO = 5V
VIN(+) >/= 1V, VIN(-) = 0, VO = 5V, TA = +25°C
VIN(+) >/= 1V, VIN(-) = 0, VO = 30V
All VIN's >/= 0V (or V-, if used)
At output switch point, V = 1.4V, RS = 0 Ohms with V+ from 5V; and over the full input common-mode range (0V to V+ -1.5V).
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 to input lines.
The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode voltage range is V+ -1.5V, but either or both inputs can go to +30V without damage.