LTC1541 LINER [Linear Technology], LTC1541 Datasheet

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LTC1541

Manufacturer Part Number
LTC1541
Description
Micropower Op Amp, Comparator and Reference
Manufacturer
LINER [Linear Technology]
Datasheet

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APPLICATIONS
TYPICAL
FEATURES
I
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
CC
Quiescent Current: 5 A Typ
Outputs Swing Rail-to-Rail
Low Op Amp Offset Voltage: 700 V Max
Reference Output Drives 0.01 F 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
Pin Compatible Upgrade for MAX951/MAX953
TYPE R
= 7 A AT V
+
10k
IN
1k
= 5V
APPLICATION
1N457
1N457
100k
Pilot Light Flame Detector with Low-Battery Lockout
U
Daisy-Chained Control Outputs
10M
2.2 F
3
2
1/2 LTC1541
+
U
VN2222
8
10k
2M
V
IN
2M
1M
= 3.6V TO 9V
1
5
6
1.2V INTERNAL
REFERENCE
+
1/2 LTC1541
OUTPUT HIGH = “ON”
OUTPUT LOW = “OFF”
7
Comparator and Reference
1541/42 • TA01
LOW BATTERY
The LTC
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 5 A. 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
extended temperature range. The output can drive a
bypass capacitor of up to 0.01 F without any oscillations.
It can also source up to 2mA and sink up to 20 A.
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.
DESCRIPTION
, LTC and LT are registered trademarks of Linear Technology Corporation.
SCR LOAD
2N3904
®
Micropower Op Amp,
1541/LTC1542 combine a micropower ampli-
U
LTC1541/LTC1542
50
40
30
20
10
–600
0
V
V
V
CC
SS
Op Amp V
CM
= 5V
= 0V
–300
INPUT OFFSET VOLTAGE ( V)
Total of 839 Units
= 2.5V, SO-8 Package
OS
Distribution,
0
1% over the
300
1541/42 TA02
600
1

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LTC1541 Summary of contents

Page 1

... Comparator and Reference DESCRIPTION ® The LTC fier, comparator and bandgap reference (LTC1541 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 Both the op amp and comparator feature a common mode input voltage range that extends from the negative supply to within 1 ...

Page 2

... CONDITIONS Commercial Grade Industrial Grade (SO-8) Commercial Grade (SO-8) Industrial Grade (SO-8) (MSOP) ORDER PART TOP VIEW NUMBER LTC1541CS8 COMPOUT 7 LTC1541IS8 6 REF + 5 COMPIN S8 PART MARKING S8 PACKAGE 1541 1541I = 150 C/W JA ORDER PART TOP VIEW NUMBER LTC1542CS8 7 COMPOUT LTC1542IS8 – ...

Page 3

... Input Common Mode Range CM CMRR Common Mode Rejection Ratio PSRR Power Supply Rejection Ratio t Propagation Delay PD V Output High Voltage OH V Output Low Voltage OL Reference (LTC1541 Only) V Reference Voltage REF V Load Regulation REF e Voltage Noise n Op Amp V Input Offset Voltage OS I Input Bias Current ...

Page 4

... Input Common Mode Range CM CMRR Common Mode Rejection Ratio PSRR Power Supply Rejection Ratio t Propagation Delay PD V Output High Voltage OH V Output Low Voltage OL Reference (LTC1541 Only) V Reference Voltage REF V Load Regulation REF e Voltage Noise 5V 0V unless otherwise noted. ...

Page 5

... Note 1: Supply current is tested with COMPIN + – LTC1541 and COMPIN = 0V, COMPIN = 100mV for LTC1542. Note 2: Input offset voltage is defined as the center of the input referred hysteresis REF (LTC1541 CONDITIONS ...

Page 6

... LTC1541/LTC1542 W U TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage 10 NONINVERTING GND AMPIN = SUPPLY VOLTAGE (V) 1541/42 TPC01 Reference Output Voltage vs Temperature 1.202 1.201 V = GND SS 1.200 1.199 1.198 1 ...

Page 7

... A = 1V/V VCL LOAD = 100k //100pF SUPPLY INPUT 200mV/DIV SS OUTPUT 100mV/DIV 1541/42 TPC10 1541/42 TPC11 LTC1541/LTC1542 Op Amp Small-Signal Transient Response NONINVERTING 1541/42 TPC11 A = 1V/V VCL LOAD = 100k //100pF SUPPLY Op Amp Open-Loop Gain and Phase vs Frequency 120 0 100 –45 80 – ...

Page 8

... REF (Pin 6) (LTC1541): Reference Output over industrial temperature range, and is also con- nected to inverting comparator input internally. This de- vice can source up to 2mA and sink The output can drive a bypass capacitor 0.01 F without – 1.3V). The input CC oscillation ...

Page 9

... INFORMATION The LTC1541/LTC1542 are a combination of a micropower op amp, comparator and 1.2V 1% reference (LTC1541 8-pin package. The LTC1541 has the negative input of the comparator internally connected to the reference output. The supply voltage range is from 2.5V to 12.6V for single supply and 1.25V to 6.3V for dual supplies. The supply current is a mere 5 A (typical) with a 5V single supply ...

Page 10

... Shunt Battery Charger with Low-Battery Load Disconnect 3.65M 1A SOLAR 3 ARRAY + 1/2 LTC1541 2 – 340k 1541/42 • F02 Figure 3a. Reference Transient Response Test Circuit LTC1541 • F03b Figure 4. Compensation for Feedback Node Capacitance 2A FUSE 6.8V 7.5 ZENER 10W 8M 1N754 DALE HLM-10 TIP121 8 12V 1 5AHR GEL CELL 4 ...

Page 11

... TYP S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 0.014 – 0.019 0.050 (0.355 – 0.483) (1.270) BSC LTC1541/LTC1542 0 500k 1 6 – 7 LTC1542 4 COMP 5 R1 ...

Page 12

... R4 – LTC1542 OP AMP 150k CC R4 1.1M VN2222 VN2222 Linear Lithium-Ion Charger D1 1N5817 IC1 V 8 LTC1541 – – 100k 4700pF 1% COMMENTS Slew Rate, Input/Output Common Mode Includes Ground Slew Rate, Input/Output Common Mode Includes Ground Amplifier, Rail-to-Rail Input and Output, 200kHz GBW 130 A of Supply Current, 1 ...

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