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LTC1541 Datasheet

Micropower Op Amp/ Comparator and Reference

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LTC1541 pdf
LTC1541/LTC1542
Micropower Op Amp,
Comparator and Reference
FEATURES
s Quiescent Current: 5µA Typ
s Outputs Swing Rail-to-Rail
s Low Op Amp Offset Voltage: 700µV Max
s Reference Output Drives 0.01µF Capacitor
s Internal 1.2V ±0.4% Reference Output (LTC1541)
s Low Input Bias Current: 1nA Max
s Reference Output Can Source Up to 2mA
s Internal ±3mV Comparator Hysteresis
s Comparator and Op Amp Input Range
Includes Ground
s Op Amp Capable of Driving Up to 1000pF Load
s Unity-Gain Stable and 12kHz Bandwidth
s 2.5V to 12.6V SupDpalyisyV-oClhtaaigneedRCaonngtreol Outputs
s Pin Compatible Upgrade for MAX951/MAX953
U
APPLICATIONS
s Battery- or Solar-Powered Systems
s Automotive Keyless Entry
s Low Frequency, Local Area Alarms/Detectors
s Infrared Receivers for Remote Controls
s Smoke Detectors and Safety Sensors
s GSM Portable Phones
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.
TYPICAL APPLICATION
Pilot Light Flame Detector with Low-Battery Lockout
TYPE R
1N457
10M
VIN = 3.6V TO 9V
1k 100k
–+
10k 1N457
ICC = 7µA AT VIN = 5V
3+ 8
2.2µF 1/2 LTC1541 1
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
INPUT OFFSET VOLTAGE (µV)
600
1541/42 TA02
1


Linear Technology Electronic Components Datasheet

LTC1541 Datasheet

Micropower Op Amp/ Comparator and Reference

No Preview Available !

LTC1541 pdf
LTC1541/LTC1542
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ........................................................ 13V
Input Voltage .............................................– 0.3V to 13V
Output Voltage ...........................................– 0.3V to 13V
Output Short-Circuit Duration .......................... Indefinite
Storage Temperature Range ................. – 65°C to 150°C
Operating Temperature Range
Commercial ............................................. 0°C to 70°C
Industrial ............................................ – 40°C to 85°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
AMPOUT 1
AMPIN 2
AMPIN+ 3
VSS 4
8 VCC
7 COMPOUT
6 REF
5 COMPIN +
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 250°C/W
ORDER PART
NUMBER
LTC1541CMS8
MS8 PART MARKING
LTBE
TOP VIEW
AMPOUT 1
AMPIN2
AMPIN+ 3
VSS 4
8 VCC
7 COMPOUT
6 REF
5 COMPIN+
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 150°C/W
ORDER PART
NUMBER
LTC1541CS8
LTC1541IS8
S8 PART MARKING
1541
1541I
TOP VIEW
AMPOUT 1
AMPIN 2
AMPIN+ 3
VSS 4
8 VCC
7 COMPOUT
6 COMPIN
5 COMPIN +
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 250°C/W
ORDER PART
NUMBER
LTC1542CMS8
MS8 PART MARKING
LTDE
TOP VIEW
AMPOUT 1
AMPIN2
AMPIN+ 3
VSS 4
8 VCC
7 COMPOUT
6 COMPIN
5 COMPIN+
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 150°C/W
ORDER PART
NUMBER
LTC1542CS8
LTC1542IS8
S8 PART MARKING
1542
1542I
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS VCC = 5V, VSS = 0V, TA = 25°C, unless otherwise noted.
SYMBOL PARAMETER
Power Supply
VCC Supply Voltage Range
ICC Supply Current (Note 1)
Comparator
VOS Input Offset Voltage (Note 2)
CONDITIONS
Commercial Grade
Industrial Grade
(SO-8)
Commercial Grade (SO-8)
Industrial Grade (SO-8)
(MSOP)
VTRIP
Trip Point (Note 3)
MIN TYP MAX UNITS
q 2.5
12.6
5 7.5
q 13
q 14
V
µA
µA
µA
1
q 1.5
q 2.0
1.2
q 2.0
1.7 2.25 2.8
q1
3.8
mV
mV
mV
mV
mV
mV
mV
2


Part Number LTC1541
Description Micropower Op Amp/ Comparator and Reference
Maker Linear Technology
Total Page 12 Pages
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