ltc1542 Linear Technology Corporation, ltc1542 Datasheet

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ltc1542

Manufacturer Part Number
ltc1542
Description
Micropower Op Amp, Comparator And Reference
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
All other trademarks are the property of their respective owners.
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
Pin Compatible Upgrade for MAX951/MAX953
Available in 3mm x 3mm x 0.8mm DFN Package
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.
I
CC
TYPE R
= 7µA AT V
+
Pilot Light Flame Detector with Low-Battery Lockout
10k
IN
1k
= 5V
1N457
1N457
100k
U
Daisy-Chained Control Outputs
10M
2.2µF
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
DESCRIPTIO
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 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).
SCR LOAD
2N3904
®
Micropower Op Amp,
1541/LTC1542 combine a micropower ampli-
U
LTC1541/LTC1542
50
40
30
20
10
0
–600
V
V
V
Op Amp V
CC
SS
CM
= 5V
= 0V
Total of 839 Units
= 2.5V, SO-8 Package
INPUT OFFSET VOLTAGE (µV)
–300
OS
Distribution,
0
300
1541/42 TA02
600
15412fd
1

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ltc1542 Summary of contents

Page 1

... 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 3. OUTPUT HIGH = “ ...

Page 2

... PART MARKING LTC1541CS8 1541 LTC1541IS8 1541I TOP VIEW AMPOUT – AMPIN 2 7 COMPOUT + – AMPIN COMPIN COMPIN SS S8 PACKAGE 8-LEAD PLASTIC SO = 150°C, θ 150°C/W JMAX JA ORDER PART S8 NUMBER PART MARKING LTC1542CS8 1542 LTC1542IS8 1542I 15412fd ...

Page 3

... CC SS CONDITIONS Commercial Grade Industrial Grade (SO-8) Commercial Grade (SO-8) Industrial Grade (SO-8) (MSOP)(DFN) Commercial Grade (MSOP)(DFN) Industrial Grade (MSOP)(DFN – 1.3V) (LTC1542 Commercial Grade Industrial Grade 12V CC Commercial Grade (SO-8) Industrial Grade (SO-8) Overdrive = 10mV Overdrive = 100mV I = – 2mA ...

Page 4

... Commercial Grade Industrial Grade f = 0.1Hz to 10Hz O CONDITIONS Commercial Grade Industrial Grade (SO-8) Commercial Grade (SO-8) Industrial Grade (SO-8) (MSOP)(DFN) Commercial Grade (MSOP)(DFN) Industrial Grade (MSOP)(DFN – 1.3V) (LTC1542 Commercial Grade Industrial Grade MIN TYP MAX UNITS ● 0. 1000 V/mV ...

Page 5

... – 1.3V Commercial Grade Industrial Grade 12V CC Commercial Grade Industrial Grade R = 100k to V LOAD SS Commercial Grade Industrial Grade R = 100k to V LOAD CC Commercial Grade Industrial Grade LTC1541/LTC1542 MIN TYP MAX UNITS 0.25 mV/V ● 0.30 mV/V ● 0.35 mV/V µs 25 µs 12 ● V – 0 ● 0.3 ...

Page 6

... CC Note 8: The LTC1541C and LTC1542C are guaranteed to meet specified performance from 0°C to 70°C. The LTC1541C and LTC1542C are designed, characterized and expected to meet performance from –40°C to 85°C, but are not tested or QA sampled at these temperatures. The ...

Page 7

... SUPPLY VOLTAGE (V) 1541/42 TPC08 Op Amp Small-Signal Transient Response INPUT 200mV/DIV OUTPUT 100mV/DIV NONINVERTING 1541/42 TPC11 A = 1V/V VCL LOAD = 100kΩ//100pF SUPPLY LTC1541/LTC1542 Op Amp Output Voltage vs Load Current 1 = ±1.5V V 0.8 SUPPLY 0.6 0.4 SINKING 0.2 CURRENT 0 SOURCING –0.2 CURRENT –0.4 –0.6 –0.8 = ± ...

Page 8

... COMPIN LTC1541 BD 0 –45 –90 –135 –180 –225 –270 –315 –360 1M 1541/42 TPC13 – (Pin 6) (LTC1542): Inverting Input of Compara- ≤ 12.6V. The supply CC with a 0.1µF capacitor to ground. CC LTC1542 + AMPOUT COMPOUT OP AMP – – AMPIN COMPIN COMP – + AMPIN COMPIN LTC1541 BD2 = 1 ...

Page 9

... Unlike bipolar input op amps and comparators, the outputs of the CMOS LTC1541/LTC1542 will not reverse phase when the inputs are taken above the common mode input range. LTC1541/LTC1542 ...

Page 10

... LTC1541/LTC1542 U U APPLICATIO S I FOR ATIO 1000 100 10 1 0.1 0.001 0.01 0.1 CAPACITOR VALUE (µF) Figure 2. Damping Resistance vs Bypass Capacitor Value REF OUT 2ms/DIV Figure 3b. Reference and Comparator Output Transient Response U TYPICAL APPLICATIO S Shunt Battery Charger with Low-Battery Load Disconnect 3.65M ...

Page 11

... LTC DWG # 05-08-1610) × 45° .053 – .069 (1.346 – 1.752) 0°– 8° TYP .016 – .050 .014 – .019 (0.406 – 1.270) (0.355 – 0.483) TYP INCHES (MILLIMETERS) LTC1541/LTC1542 R = 0.115 0.38 ± 0.10 TYP 5 8 3.00 ±0.10 1.65 ± 0.10 (2 SIDES) (4 SIDES) (DD8) DFN 0203 4 1 0.28 ± ...

Page 12

... Amplifier, Rail-to-Rail Input and Output, 200kHz GBW 130µA of Supply Current, 1.3mV V SO-8 and 14-Lead Standard Pinout, 70µV V SO-8 and 14-Lead Standard Pinout, 70µV V www.linear.com ● Single Supply Function Generator 0.1µ – 500k 1 6 LTC1542 – OP AMP 7 3 LTC1542 + 4 COMP 10M FREQ ≈ R3 ...

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