1

LTC1540

sn1540 1540fas

APPLICATIO S

DESCRIPTIO

FEATURES

TYPICAL APPLICATIO

Nanopower Comparator

with Reference

R1

4.32M

1%

R2

3M

1%

3.3V

21

7

8

GND

OUT

LTC1540

1540 • TA01

HYST

REF

3

4

5

6

–

+

TEMPERATURE (°C)

–40

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

20

60

1540 • TA02

–20

0

40

80

100

The LTC

with built-in reference. The comparator’s features

include less than 0.6µA supply current over the commer-

cial temperature range, a 1.182V ±2% reference, pro-

grammable hysteresis and TTL/CMOS outputs that sink

and source current. The reference output can drive a

bypass capacitor of up to 0.01µF without oscillation.

The comparator operates from a single 2V to 11V supply

or a dual ±1V to ±5.5V supply. Comparator hysteresis is

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 compara-

tor 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. For space limited applications, the LTC1540 is

available in a 3mm x 3mm low profile (0.8mm) dual fine-

pitch leadless package (DFN).

LTC1540 Supply Current vs Temperature

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