LTC1541IDD データシートの表示（PDF） - Linear Technology
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LTC1541IDD Datasheet PDF : 12 Pages
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LTC1541/LTC1542
Micropower Op Amp,
Comparator and Reference
FEATURES
■ 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 UpDgariasdy-eChfoarinMedACXo9n5tr1ol/MOuAtpXu9ts53
■ Available in 3mm x 3mm x 0.8mm DFN Package
U
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.
DESCRIPTIO
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 ±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).
TYPICAL APPLICATIO
Pilot Light Flame Detector with Low-Battery Lockout
VIN = 3.6V TO 9V
TYPE R
1N457
10M
1k 100k
–+
10k 1N457
ICC = 7µA AT VIN = 5V
3+
8
1
2.2µF 1/2 LTC1541
2–
2M
1M
2M
10k
OUTPUT HIGH = “ON”
OUTPUT LOW = “OFF”
2N3904
5+
1/2 LTC1541
6–
SCR LOAD
7 LOW BATTERY
1.2V INTERNAL
REFERENCE
VN2222
1541/42 • TA01
Op Amp VOS Distribution,
VCM = 2.5V, SO-8 Package
Total of 839 Units
50
VCC = 5V
VSS = 0V
40
30
20
10
0
–600
–300
0
300
600
INPUT OFFSET VOLTAGE (µV)
1541/42 TA02
15412fd
1
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