LTC1444 Series

Ultralow Power Quad Comparators with Reference

Catalog

Ultralow Power Quad Comparators with Reference

Part	Current - Output (Typ)	Mounting Type	Output Type	Type	Current - Quiescent (Max) [Max]	Voltage - Supply, Single/Dual (±) [Min]	Voltage - Supply, Single/Dual (±) [Max]	Supplier Device Package	Number of Elements	Hysteresis	Voltage - Input Offset (Max)	Package / Case	Package / Case	Package / Case	CMRR, PSRR (Typ)	CMRR, PSRR (Typ)	Propagation Delay (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case [x]	Package / Case [y]
Analog Devices LTC1444IN#PBF	0.015 mA	Through Hole	CMOS Open-Drain TTL	with Voltage Reference	8.5 µA	1 V 2 V	5.5 V 11 V	16-PDIP	4	50 mV	10 mV	0.3 in	16-DIP	7.62 mm	80 dB	80 dB	12 µs	85 °C	-40 °C
Analog Devices LTC1444IDHD#TRPBF	0.015 mA	Surface Mount	CMOS Open-Drain TTL	with Voltage Reference	8.5 µA	1 V 2 V	5.5 V 11 V	16-DFN (5x4)	4	50 mV	10 mV		16-WFDFN Exposed Pad		80 dB	80 dB	12 µs	85 °C	-40 °C
Analog Devices LTC1444CDHD#TRPBF	0.015 mA	Surface Mount	CMOS Open-Drain TTL	with Voltage Reference	8.5 µA	1 V 2 V	5.5 V 11 V	16-DFN (5x4)	4	50 mV	10 mV		16-WFDFN Exposed Pad		80 dB	80 dB	12 µs	70 °C	0 °C
Analog Devices LTC1444CN#PBF	0.015 mA	Through Hole	CMOS Open-Drain TTL	with Voltage Reference	8.5 µA	1 V 2 V	5.5 V 11 V	16-PDIP	4	50 mV	10 mV	0.3 in	16-DIP	7.62 mm	80 dB	80 dB	12 µs	70 °C	0 °C
Analog Devices LTC1444CS#PBF	0.015 mA	Surface Mount	CMOS Open-Drain TTL	with Voltage Reference	8.5 µA	1 V 2 V	5.5 V 11 V	16-SO	4	50 mV	10 mV		16-SOIC		80 dB	80 dB	12 µs	70 °C	0 °C	0.154 in	3.9 mm

Catalog

Ultralow Power Quad Comparators with Reference

Key Features

• Ultralow Quiescent Current: 8.5μA Max

• Reference Output Drives 0.01μF Capacitor

• Adjustable Hysteresis (LTC1444/LTC1445)

• Wide Supply RangeSingle: 2V to 11VDual: ±1V to ±5.5V

• Input Voltage Range Includes the Negative Supply

• TTL/CMOS Compatible Outputs

• Propagation Delay: 12μs (Typ) (10mV Overdrive)

• No Crowbar Current

• 40mA Continuous Source Current

• Pin Compatible Upgrades for MAX924 (LTC1443)

• Low Profile (5mm × 4mm × 0.8mm) DFN Package

Description

The LTC1443/LTC1444/LTC1445 are ultralow power quad comparators with a built-in reference. The comparators feature less than 8.5μA supply current over temperature, an internal reference (1.182V ±1% for LTC1443 or 1.221V ±1% for LTC1444/LTC1445), programmable hysteresis (LTC1444/LTC1445) and TTL/CMOS output (LTC1443/ LTC1445) that sinks and sources current (open-drain output for LTC1444). The reference output can drive a bypass capacitor of up to 0.01μF without oscillation.The comparators operate from a single 2V to 11V supply or a dual ±1V to ±5.5V supply (LTC1443). Comparator hysteresis is easily programmable using two resistors and the HYST pin (LTC1444/LTC1445). Each comparator’s input operates from the negative supply to within 1.3V of the positive supply. The LTC1443/LTC1445 comparator output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally happens when the comparator changes logic states, power supply glitches are eliminated.The LTC1443/LTC1444/LTC1445 are available in the 16-pin SO, PDIP and DFN packages.ApplicationsBattery-Powered System MonitoringThreshold DetectorsWindow ComparatorsOscillator Circuits