Document
FEATURES
Internal 400mV Reference n Total Threshold Error: ±1.25% Max at 25°C n Inputs and Outputs Operate to 36V n Wide Supply Range: 1.4V to 18V n Specified for –55°C to 125°C Temperature Range n Low Quiescent Current: 6.5µA Typ at 5V n Internal Hysteresis: 6.5mV Typ n Low Input Bias Current: ±10nA Max n Over-The-Top® Input also Includes Ground n Open-Collector Outputs Allow Level Translation n Choice of Input Polarities: LT6700-1/LT6700-2/ LT6700-3/LT6700HV-1/LT6700HV-2/LT6700HV-3 n Available in Low Profile (1mm) SOT-23 (ThinSOT™) and 2mm × 3mm DFN Packages
n
LT6700/LT6700HV Micropower, Low Voltage, Dual Comparator with 400mV Reference DESCRIPTION
The LT®6700/LT6700HV combine two micropower, low voltage comparators with a 400mV reference in a 6-lead SOT-23 or 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 comparators, easing design requirements to insure stable output operation. The comparators each have one input available externally; the other inputs are connected internally to the reference. The comparator outputs are open collector and the output load can be referred to any voltage up to 18V (36V for LT6700HV), independent of supply voltage. The output stage sinking capability is guaranteed to be greater than 5mA over temperature. The three versions of this part differ by the polarity of the available comparator inputs. The LT6700-1/ LT6700HV-1 has one inverting input and one noninverting input, making it suitable for use as a window comparator. The LT6700-2/LT6700HV-2 has two inverting inputs and the LT6700-3/LT6700HV-3 has two noninverting inputs. All versions are offered in commercial, industrial and automotive temperature ranges.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered trademarks and ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
APPLICATIONS
n n n n n
n n
Battery-Powered System Monitoring Threshold Detectors Window Comparators Relay Driving Industrial Control Systems Handheld Instruments Automotive Monitor and Controls
TYPICAL APPLICATION
Micropower Battery Monitor
1M LT6700-3 1M COMP B THRESHOLD VOLTAGE (mV) VBATT > 1.6V 63.4k 1M VBATT 1.4V (MIN) 3V (NOM)
Comparator Thresholds vs Temperature
406 404 402 400 398 396 394 TWO TYPICAL PARTS 392 COMP A AND B VS = 5V 390 –60 –40 –20 0 20 40 60 80 100 120 TEMPERATURE (°C)
6700123 TA02
+
0.1µF
#1A #1B
#2A #2B RISING INPUT
ALKALINE AA CELLS
+ +
–
VR = 400mV REFERENCE VS
FALLING INPUT
– +
261k
COMP A VBATT > 2V MONITOR CONSUMES ~10µA HYSTERESIS IS APPROXIMATELY 2% OF TRIP VOLTAGE
6700123 TA01
6700123fh
For more information www.linear.com/LT6700
1
Free Datasheet http://www.datasheet4u.com/
LT6700/LT6700HV ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (VS to GND)...........................18.5V Input Voltage (+IN, –IN) LT6700 (Note 3)........................... 18.5V to (GND – 0.3V) LT6700HV (Note 3)......................... 40V to (GND – 0.3V) LT6700 Output Voltage (OUT)...... 18.5V to (GND – 0.3V) LT6700HV Output Voltage (OUT).... 40V to (GND – 0.3V) Output Short-Circuit Duration (Note 2)............. Indefinite Input Current (Note 3)...........................................–10mA Operating Temperature Range (Note 4) LT6700CS6/LT6700HVCS6/ LT6700CDCB-1/-2/-3 ...........................– 40°C to 85°C LT6700IS6/LT6700HVIS6/ LT6700IDCB-1/-2/-3 ............................. –40°C to 85°C LT6700HS6/LT6700HVHS6/ LT6700HDCB-1/-2/-3 ......................... –40°C to 125°C LT6700MPDCB/ LT6700MPS6-1/-2/-3.......................... –55°C to 125°C
Specified Temperature Range (Note 5) LT6700CS6/LT6700HVCS6/ LT6700CDCB-1/-2/-3 .............................. 0°C to 70°C LT6700IS6/LT6700HVIS6/ LT6700IDCB-1/-2/-3 ............................. –40°C to 85°C LT6700HS6/LT6700HVHS6/ LT6700HDCB-1/-2/-3 ........................ –40°C to 125°C LT6700MPDCB/ LT6700PMS6-1/-2/-3.......................... –55°C to 125°C Maximum Junction Temperature S6 Package........................................................ 150°C DCB6 Package................................................... 150°C Storage Temperature Range S6 Package......................................... –65°C to 150°C DCB6 Package.................................... –65°C to 150°C Lead Temperature, TSOT-23 (Soldering, 10 sec).... 300°C
PIN CONFIGURATION
LT6700-1 LT6700HV-1 TOP VIEW OUTA 1 GND 2 +INA 3 6 OUTB 5 VS 4 –INB OUTA 1 GND 2 –INA 3 LT6700-2 LT6700HV-2 TOP VIEW 6 OUTB 5 VS 4 –INB OUTA 1 GND 2 +INA 3 LT6700-3 LT6700HV-3 TOP VIEW 6 OUTB 5 VS 4 +INB
S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 230°C/W LT6700-1 TOP VIEW OUTA 1 OUTB 2 VS 3 7 6 + INA 5 GND 4 –INB LT6700-2
S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 230°C/W LT6700-3 TOP VIEW OUTA 1 OUTB 2 VS 3 7 6 – INA 5 GND 4 –INB.