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FEATURES
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LT6703-2/LT6703-3 Micropower, Low Voltage Comparator with 400mV Reference DESCRIPTION
The LT®6703-2/LT6703-3 combine a micropower, low voltage comparator with a 400mV reference in a tiny DFN package. Operating with supplies from 1.4V up to 18V, these devices draw only 6.5μA, making them ideal for low voltage system monitoring. Hysteresis is included in the comparator, ensuring stable operation. The comparator has one input available externally while the other input is connected internally to the reference. The comparator output is open collector and the output load can be referred to any voltage up to 18V independent of supply voltage. The output stage has a guaranteed current sink capability of more than 5mA over temperature. The two versions of this part differ by the polarity of the available comparator input. The LT6703-2 has an inverting input and the LT6703-3 has a noninverting input. Both versions are offered in commercial, industrial and automotive temperature ranges.
, LT, LTC, LTM and Over-The-Top are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Internal 400mV Reference Total Threshold Error: ± 1.25% Max at 25°C Wide Supply Range: 1.4V to 18V Specified for –40 to 125°C Temperature Range Low Quiescent Current: 6.5μA Typ at 5V Internal Hysteresis: 6.5mV Typ Low Input Bias Current: ±10nA Max Over-The-Top® Input also Includes Ground Open-Collector Output Allows Level Translation Choice of Input Polarities: LT6703-2/LT6703-3 Available in a 2mm × 2mm DFN Package
APPLICATIONS
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Battery-Powered System Monitoring Threshold Detectors Window Comparators Relay Driving Optoisolator Driving Industrial Control Systems Handheld Instruments
TYPICAL APPLICATION
Micropower Supply Voltage Monitor
1.4V ≤ VIN ≤ 18V (VTH = 3V)
Rising Input Threshold Voltage vs Temperature
RISING INPUT THRESHOLD VOLTAGE (mV) 404 403 402 401 400 399 398 397 #4 #2 #1 FOUR TYPICAL PARTS VS = 5V
1MΩ
LT6703-3 +IN
VS
1MΩ
+
OUT
#3
0.1μF 154k
–
400mV REFERENCE GND VS
670323 TA01
396 –60 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C)
670323 G04
670323fa
1
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LT6703-2/LT6703-3 ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (VS to GND) ..........................18.5V Input Voltage (+IN, –IN) (Note 3)....................................... 18.5V to (GND – 0.3V) Output Voltage (OUT).................. 18.5V to (GND – 0.3V) Output Short-Circuit Duration (Note 2) ............ Indefinite Input Current (Note 3)..........................................–10mA Operating Temperature Range (Note 4) LT6703C-2/-3 ...................................... –40°C to 85°C
LT6703I-2/-3 ....................................... –40°C to 85°C LT6703H-2/-3 ................................... –40°C to 125°C Specified Temperature Range (Note 5) LT6703C-2/-3 ......................