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LTC1542

Description
Micropower Op Amp, Comparator and Reference
File Size128KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC1542 Overview

Micropower Op Amp, Comparator and Reference

LTC1541/LTC1542
Micropower Op Amp,
Comparator and Reference
FEATURES
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DESCRIPTION
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
to
±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
±3mV
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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Quiescent Current: 5
µ
A Typ
Outputs Swing Rail-to-Rail
Low Op Amp Offset Voltage: 700
µ
V 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
±3mV
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
Outputs
Daisy-Chained Control
Pin Compatible Upgrade for MAX951/MAX953
APPLICATIONS
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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
TYPICAL APPLICATION
Pilot Light Flame Detector with Low-Battery Lockout
V
IN
= 3.6V TO 9V
1N457
TYPE R
1k
100k
1N457
10M
3
10k
2.2µF 1/2 LTC1541
2
2N3904
SCR LOAD
PERCENT OF UNITS (%)
+
+
8
1
OUTPUT HIGH = “ON”
OUTPUT LOW = “OFF”
I
CC
= 7µA AT V
IN
= 5V
2M
5
1M
6
2M
1.2V INTERNAL
REFERENCE
1541/42 • TA01
+
1/2 LTC1541
7
LOW BATTERY
10k
VN2222
U
U
U
Op Amp V
OS
Distribution,
V
CM
= 2.5V, SO-8 Package
Total of 839 Units
50
V
CC
= 5V
V
SS
= 0V
40
30
20
10
0
–600
0
300
–300
INPUT OFFSET VOLTAGE (µV)
600
1541/42 TA02
1

LTC1542 Related Products

LTC1542 LTC1542CS8 LTC1542CMS8 LTC1541IS8 LTC1541 LTC1541CMS8
Description Micropower Op Amp, Comparator and Reference Micropower Op Amp, Comparator and Reference Micropower Op Amp, Comparator and Reference Micropower Op Amp, Comparator and Reference Micropower Op Amp, Comparator and Reference Micropower Op Amp, Comparator and Reference
Brand Name - Linear Technology Linear Technology Linear Technology - Linear Technology
Is it Rohs certified? - incompatible incompatible incompatible - incompatible
Maker - Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) - Linear ( ADI )
Parts packaging code - SOIC MSOP SOIC - MSOP
package instruction - SOP, TSSOP, 0.150 INCH, PLASTIC, SO-8 - TSSOP,
Contacts - 8 8 8 - 8
Manufacturer packaging code - S8 MS8 S8 - MS8
Reach Compliance Code - _compli _compli _compli - _compli
ECCN code - EAR99 EAR99 EAR99 - EAR99
Other features - CAN ALSO OPERATE WITH 5V SUPPLY CAN ALSO OPERATE WITH 5V SUPPLY CAN ALSO OPERATE WITH 5V SUPPLY - CAN ALSO OPERATE WITH 5V SUPPLY
Analog Integrated Circuits - Other Types - ANALOG CIRCUIT ANALOG CIRCUIT ANALOG CIRCUIT - ANALOG CIRCUIT
JESD-30 code - R-PDSO-G8 S-PDSO-G8 R-PDSO-G8 - S-PDSO-G8
JESD-609 code - e0 e0 e0 - e0
length - 4.9025 mm 3 mm 4.9025 mm - 3 mm
Humidity sensitivity level - 1 1 1 - 1
Number of functions - 1 1 1 - 1
Number of terminals - 8 8 8 - 8
Maximum operating temperature - 70 °C 70 °C 85 °C - 70 °C
Package body material - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY
encapsulated code - SOP TSSOP SOP - TSSOP
Package shape - RECTANGULAR SQUARE RECTANGULAR - SQUARE
Package form - SMALL OUTLINE SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE - SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) - 235 235 235 - 235
Certification status - Not Qualified Not Qualified Not Qualified - Not Qualified
Maximum seat height - 1.752 mm 1.1 mm 1.752 mm - 1.1 mm
Maximum supply voltage (Vsup) - 12.6 V 12.6 V 12.6 V - 12.6 V
Minimum supply voltage (Vsup) - 2.5 V 2.5 V 2.5 V - 2.5 V
Nominal supply voltage (Vsup) - 3 V 3 V 3 V - 3 V
surface mount - YES YES YES - YES
technology - CMOS CMOS CMOS - CMOS
Temperature level - COMMERCIAL COMMERCIAL INDUSTRIAL - COMMERCIAL
Terminal surface - Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) - Tin/Lead (Sn/Pb)
Terminal form - GULL WING GULL WING GULL WING - GULL WING
Terminal pitch - 1.27 mm 0.65 mm 1.27 mm - 0.65 mm
Terminal location - DUAL DUAL DUAL - DUAL
Maximum time at peak reflow temperature - 20 20 20 - 20
width - 3.899 mm 3 mm 3.899 mm - 3 mm
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