LTC1542_15 datasheet, PDF - EEWORLD Datasheet

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LTC1542_15: DescriptionMicropower Op Amp, Comparator and Reference; File Size233KB，12 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC1542_15 Overview

Micropower Op Amp, Comparator and Reference

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LTC1541/LTC1542

Micropower Op Amp,

Comparator and Reference

FEATURES

■

DESCRIPTIO

Quiescent Current: 5µA Typ

Outputs Swing Rail-to-Rail

Low Op Amp Offset Voltage: 700µV Max

Reference Output Drives 0.01µF Capacitor

Internal 1.2V

±0.4%

Reference Output (LTC1541)

Low Input Bias Current: 1nA Max

Reference Output Can Source Up to 2mA

Internal

±2.25mV

Comparator Hysteresis

Comparator and Op Amp Input Range

Includes Ground

Op Amp Capable of Driving Up to 1000pF Load

Unity-Gain Stable and 12kHz Bandwidth

2.5V to 12.6V Supply Voltage Range

Daisy-Chained Control Outputs

Pin Compatible Upgrade for MAX951/MAX953

Available in 3mm x 3mm x 0.8mm DFN Package

The LTC

1541/LTC1542 combine a micropower ampli-

fier, comparator and bandgap reference (LTC1541) in an

8-pin package. The part operates from a single 2.5V to

12.6V or dual

±1.25V

6.3V supply with a typical supply

current of 5µA. Both the op amp and comparator feature

a common mode input voltage range that extends from the

negative supply to within 1.3V of the positive supply. The

op amp output stage swings from rail-to-rail. The

comparator’s inverting input is internally connected to the

reference output (LTC1541).

The reference output voltage is 1.2V

±1%

over the

extended temperature range. The output can drive a

bypass capacitor of up to 0.01µF without any oscillations.

It can also source up to 2mA and sink up to 20µA.

The op amp is internally compensated to be unity-gain

stable with typical GBW at 12kHz and slew rate of 8V/ms.

The comparator has

±2.25mV

of internal hysteresis to

ensure clean output switching, even with slow moving

input signals.

The LTC1541/LTC1542 are available in MSOP and SO-8

packages. For space-limited applications, the LTC1541/

LTC1542 are available in a 3mm x 3mm low profile

(0.8mm) dual fine-pitch leadless package (DFN).

APPLICATIO S

■

Battery- or Solar-Powered Systems

Automotive Keyless Entry

Low Frequency, Local Area Alarms/Detectors

Infrared Receivers for Remote Controls

Smoke Detectors and Safety Sensors

GSM Portable Phones

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

1N457

TYPE R

100k

1N457

10M

Pilot Light Flame Detector with Low-Battery Lockout

= 3.6V TO 9V

–

10k

2.2µF 1/2 LTC1541

OUTPUT HIGH = “ON”

OUTPUT LOW = “OFF”

PERCENT OF UNITS (%)

2N3904

SCR LOAD

= 7µA AT V

= 5V

1.2V INTERNAL

REFERENCE

1541/42 • TA01

1/2 LTC1541

LOW BATTERY

–

–600

300

–300

INPUT OFFSET VOLTAGE (µV)

600

1541/42 TA02

10k

VN2222

Op Amp V

Distribution,

= 2.5V, SO-8 Package

Total of 839 Units

= 5V

= 0V

15412fd

LTC1542_15 Related Products

	LTC1542_15	LTC1541_15
Description	Micropower Op Amp, Comparator and Reference	Micropower Op Amp, Comparator and Reference

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