1

LTC1440/LTC1441/LTC1442

144012fd

APPLICATIO S

Ultralow Power Single/Dual

Comparator with Reference

R1

1.65M

1%

R2

1.13M

1%

3.3V

21

7

8

GND

OUT

LTC1440

1440 TA01

HYST

REF

3

4

5

6

–

+

TEMPERATURE (

°C)

–40

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

20

60

1440/1/2 TA02

–20

0

40

80

100

LTC1440 Supply Current vs Temperature

The LTC

single and dual comparators with built-in references. The

comparators feature less than 3.7

µA supply current over

temperature (LTC1440), a 1.182V

±1% reference, pro-

grammable hysteresis (LTC1440/LTC1442) and TTL/CMOS

outputs that sink and source current. The reference output

can drive a bypass capacitor of up to 0.01

µF without

oscillation.

The comparators operate from a single 2V to 11V supply

or a dual

±1V to ±5.5V supply (LTC1440). Comparator

hysteresis is easily programmed by using two resistors

and the HYST pin (LTC1440/LTC1442). 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 happens when the

comparator changes logic states, the power supply glitches

are eliminated.

The LTC1440 is available in 8-pin PDIP, SO, MSOP and

DFN packages. The LTC1441/LTC1442 are available in

8-pin PDIP and SO packages.

■

Threshold Detectors

■

Adjustable Hysteresis (LTC1440/LTC1442)

Single: 2V to 11V

Dual:

±1V to ±5.5V

■

12

µs Propagation Delay with 10mV Overdrive

■

Pin Compatible Upgrades for MAX921/922/923

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.