LTC1042CN8PBF Linear Technology Corporation, LTC1042CN8PBF Datasheet

LTC1042CN8PBF

Manufacturer Part Number

LTC1042CN8PBF

Description

DIP8

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC1042CN8PBF.pdf (8 pages)

Specifications of LTC1042CN8PBF

Date_code

10+

Current page: 1 of 8
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FEATURES

APPLICATIO S

LTCMOS is a trademark of Linear Technology Corp.

TYPICAL APPLICATIO

T = YELLOW SPRINGS INSTRUMENT CO., INC. P/N 44007

ALL RESISTORS ±1% UNLESS OTHERWISE SPECIFIED

*OTHER TEMPERATURE BANDS MAY BE SELECTED BY CHOOSING APPROPRIATE VALUES FOR R1 AND R2

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

Micropower 1.5µW (1 Sample/Second)

Wide Supply Range — 2.8V to 16V

High Accuracy

Wide Input Voltage Range

TTL Outputs with 5V Supply

Two Independent Ground-Referred Control Inputs

Small Size 8-Pin MiniDIP

Fault Detectors

Go/No-Go Testing

Microprocessor Power Supply Monitor

3V TO 16V

Center Error ±1mV Max

Width Error ±0.15% Max

to Ground

150k

R1*

7.5k

R2*

576Ω

Battery-Powered Remote Freezer Alarm

150k

LTC1042

10M ±5%

0.05µF

“HI” =

TEMPERATURE

BETWEEN

26°F AND 31°F

±1°F

TEMPERATURE

ABOVE 31°F

±1°F

LTC1042 • A01

DESCRIPTIO

The LTC

manufactured using Linear Technology’s enhanced

LTCMOS

voltage inputs, CENTER and WIDTH/2, define the middle

and width of the comparison window. Whenever the input

voltage, V

output is high. The ABOVE WINDOW output is high

whenever V

and CENTER, the ABOVE WINDOW output becomes

BELOW WINDOW and is high if V

Sampling techniques provide high impedance voltage

inputs that can common mode to both supply rails

non-interaction. Also the device is effectively “chopper

stabilized,” giving it extremely high accuracy over

all conditions of temperature, power supply and input

voltage range.

Another benefit of the sampling techniques used to design

the LTC1042 is the extremely low power consumption.

When the device is strobed, it internally turns on the power

to the comparators, samples the inputs, stores the outputs

in CMOS latches and then turns off power to the compara-

tors. This all happens in about 80µs. Average power can be

made small, almost arbitrarily, by lowering the strobe rate.

The device can be self-strobed using an external RC

network or strobed externally by driving the OSC pin with

a CMOS gate.

and GND). An important feature of the inputs is their

™

1042 is a monolithic CMOS window comparator

Window Comparator

silicon gate process. Two high impedance

, is inside the window the WITHIN WINDOW

10000

1000

0.01

100

0.1

is above the window. By interchanging V

0.1

vs Sampling Frequency

Total Supply Current

SAMPLING FREQUENCY, f

= 6V

FOR THIS APPLICATION

≈ 1HZ

100

LTC1042 SUPPLY

CURRENT

1000

(Hz)

is below the window.

LTC1042 • TA02

LTC1042

10000

1042fa

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