The LTC1541/LTC1542IS8 combine a micropower amplifier, 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/LTC1542IS8 are available in MSOP and SO-8 packages. For space-limited applications, the LTC1541/LTC1542IS8 are available in a 3mm × 3mm low profile (0.8mm) dual fine-pitch leadless package (DFN).
Feature
- 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 × 3mm × 0.8mm DFN Package
Applications
- 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
(Picture: Pinout)
