Datasheet LTC1541, LTC1542 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | Micropower Op Amp, Comparator and Reference |
| Seiten / Seite | 12 / 1 — FEATURES. DESCRIPTIO. Quiescent Current: 5. A Typ. Outputs Swing … |
| Dateiformat / Größe | PDF / 267 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTIO. Quiescent Current: 5. A Typ. Outputs Swing Rail-to-Rail. Low Op Amp Offset Voltage: 700. V Max
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LTC1541/LTC1542 Micropower Op Amp, Comparator and Reference
U FEATURES DESCRIPTIO
■
Quiescent Current: 5
µ
A Typ
The LTC®1541/LTC1542 combine a micropower ampli- ■
Outputs Swing Rail-to-Rail
fier, comparator and bandgap reference (LTC1541) in an ■
Low Op Amp Offset Voltage: 700
µ
V Max
8-pin package. The part operates from a single 2.5V to ■ Reference Output Drives 0.01µF Capacitor 12.6V or dual ±1.25V to ± 6.3V supply with a typical supply ■ Internal 1.2V ±0.4% Reference Output (LTC1541) current of 5µA. Both the op amp and comparator feature ■ Low Input Bias Current: 1nA Max a common mode input voltage range that extends from the ■ Reference Output Can Source Up to 2mA negative supply to within 1.3V of the positive supply. The ■ Internal ±2.25mV Comparator Hysteresis op amp output stage swings from rail-to-rail. The ■ Comparator and Op Amp Input Range comparator’s inverting input is internally connected to the Includes Ground reference output (LTC1541). ■ Op Amp Capable of Driving Up to 1000pF Load The reference output voltage is 1.2V ±1% over the ■ Unity-Gain Stable and 12kHz Bandwidth extended temperature range. The output can drive a ■ 2.5V to 12.6V Supply Voltage Range bypass capacitor of up to 0.01µF without any oscillations.
Daisy-Chained Control Outputs
■ Pin Compatible Upgrade for MAX951/MAX953 It can also source up to 2mA and sink up to 20µA. ■ Available in 3mm x 3mm x 0.8mm DFN Package
U
The op amp is internally compensated to be unity-gain
APPLICATIO S
stable with typical GBW at 12kHz and slew rate of 8V/ms. The comparator has ±2.25mV of internal hysteresis to ■ Battery- or Solar-Powered Systems ensure clean output switching, even with slow moving ■ Automotive Keyless Entry input signals. ■ Low Frequency, Local Area Alarms/Detectors ■ Infrared Receivers for Remote Controls The LTC1541/LTC1542 are available in MSOP and SO-8 ■ Smoke Detectors and Safety Sensors packages. For space-limited applications, the LTC1541/ ■ GSM Portable Phones LTC1542 are available in a 3mm x 3mm low profile , LTC and LT are registered trademarks of Linear Technology Corporation. (0.8mm) dual fine-pitch leadless package (DFN). All other trademarks are the property of their respective owners.
U TYPICAL APPLICATIO Op Amp VOS Distribution, V Pilot Light Flame Detector with Low-Battery Lockout CM = 2.5V, SO-8 Package Total of 839 Units
VIN = 3.6V TO 9V 50 V 1N457 CC = 5V 10M V TYPE R SS = 0V 40 1k 100k 3 + 8 OUTPUT HIGH = “ON” – + 1 OUTPUT LOW = “OFF” 10k 1N457 2.2µF 30 1/2 LTC1541 2N3904 2 – SCR LOAD 2M 20 ICC = 7µA AT VIN = 5V 5 + PERCENT OF UNITS (%) 7 LOW BATTERY 1M 1/2 LTC1541 10 6 – 2M 0 –600 –300 0 300 600 1.2V INTERNAL REFERENCE INPUT OFFSET VOLTAGE (µV) 10k 1541/42 TA02 1541/42 • TA01 VN2222 15412fd 1
U FEATURES DESCRIPTIO
■
Quiescent Current: 5
µ
A Typ
The LTC®1541/LTC1542 combine a micropower ampli- ■
Outputs Swing Rail-to-Rail
fier, comparator and bandgap reference (LTC1541) in an ■
Low Op Amp Offset Voltage: 700
µ
V Max
8-pin package. The part operates from a single 2.5V to ■ Reference Output Drives 0.01µF Capacitor 12.6V or dual ±1.25V to ± 6.3V supply with a typical supply ■ Internal 1.2V ±0.4% Reference Output (LTC1541) current of 5µA. Both the op amp and comparator feature ■ Low Input Bias Current: 1nA Max a common mode input voltage range that extends from the ■ Reference Output Can Source Up to 2mA negative supply to within 1.3V of the positive supply. The ■ Internal ±2.25mV Comparator Hysteresis op amp output stage swings from rail-to-rail. The ■ Comparator and Op Amp Input Range comparator’s inverting input is internally connected to the Includes Ground reference output (LTC1541). ■ Op Amp Capable of Driving Up to 1000pF Load The reference output voltage is 1.2V ±1% over the ■ Unity-Gain Stable and 12kHz Bandwidth extended temperature range. The output can drive a ■ 2.5V to 12.6V Supply Voltage Range bypass capacitor of up to 0.01µF without any oscillations.
Daisy-Chained Control Outputs
■ Pin Compatible Upgrade for MAX951/MAX953 It can also source up to 2mA and sink up to 20µA. ■ Available in 3mm x 3mm x 0.8mm DFN Package
U
The op amp is internally compensated to be unity-gain
APPLICATIO S
stable with typical GBW at 12kHz and slew rate of 8V/ms. The comparator has ±2.25mV of internal hysteresis to ■ Battery- or Solar-Powered Systems ensure clean output switching, even with slow moving ■ Automotive Keyless Entry input signals. ■ Low Frequency, Local Area Alarms/Detectors ■ Infrared Receivers for Remote Controls The LTC1541/LTC1542 are available in MSOP and SO-8 ■ Smoke Detectors and Safety Sensors packages. For space-limited applications, the LTC1541/ ■ GSM Portable Phones LTC1542 are available in a 3mm x 3mm low profile , LTC and LT are registered trademarks of Linear Technology Corporation. (0.8mm) dual fine-pitch leadless package (DFN). All other trademarks are the property of their respective owners.
U TYPICAL APPLICATIO Op Amp VOS Distribution, V Pilot Light Flame Detector with Low-Battery Lockout CM = 2.5V, SO-8 Package Total of 839 Units
VIN = 3.6V TO 9V 50 V 1N457 CC = 5V 10M V TYPE R SS = 0V 40 1k 100k 3 + 8 OUTPUT HIGH = “ON” – + 1 OUTPUT LOW = “OFF” 10k 1N457 2.2µF 30 1/2 LTC1541 2N3904 2 – SCR LOAD 2M 20 ICC = 7µA AT VIN = 5V 5 + PERCENT OF UNITS (%) 7 LOW BATTERY 1M 1/2 LTC1541 10 6 – 2M 0 –600 –300 0 300 600 1.2V INTERNAL REFERENCE INPUT OFFSET VOLTAGE (µV) 10k 1541/42 TA02 1541/42 • TA01 VN2222 15412fd 1