LTC1540

Voltage
V+ to V , V + to GND, GND to V ...........12V to 0.3V
IN +, IN , HYST ................. (V+ + 0.3V) to (V   0.3V)
REF ................................... (V+ + 0.3V) to (V   0.3V)
OUT ................................... (V+ + 0.3V) to (GND  0.3V)
Current
IN +, IN , HYST ................................................... 20mA
REF ....................................................................... 20mA
OUT ...................................................................... 50mA
OUT Short-Circuit Duration (V + £ 5.5V) ...... Continuous
Power Dissipation ............................................. 500mW
Operating Temperature Range
LTC1540C............................................... 0°C to 70°C
LTC1540I............................................ 40°C to 85°C
Storage Temperature Range .........  65°C to 150°C
Lead Temperature (Soldering, 10 sec).............. 300°C


Description

The LTC®1540 is an ultralow power, single comparator with built-in reference. The comparator's features include less than 0.6mA supply current over the commercial temperature range, a 1.182V ±2% reference, programmable hysteresis and TTL/CMOS outputs that sink and source current. The reference output can drive bypass capacitor of up to 0.01mF without oscillation.

The comparator of LTC1540 operates from a single 2V to 11V supply or a dual ±1V to ±5.5V supply. Comparator hysteresis easily programmed by using two resistors and the HYST pin. Each comparator's input operates from the negative supply to within 1.3V of the positive supply. 

The comparator output stage can continuously source up to 40mA. By eliminating the cross-conducting current that normally occur when the comparator changes logic states, power supply glitches are eliminated. The LTC1540 is available in the 8-pin MSOP and SO packages.