ISL21440
Micropower Voltage Reference with Comparator
Key Features
- 1.8µA Supply Current Over Full Temperature Range
- Wide Supply Range: 2V to 11V
- Precision 1.182V ±0.5% Voltage Reference
- Comparator with User Programmable Hysteresis
- Temperature Range: -40°C to +125°C
- 8 Ld MSOP and 8 Ld TDFN Packages
- Pin Compatible Upgrade to MAX921 and LTC1440
Description
The ISL21440 is a micropower, FGA™ reference and comparator on a single chip. Drawing less than 1.8µA supply current over the full operating temperature range, the ISL21440 operates from a single 2V to 11V supply and can also be used with split bipolar supplies.
The ISL21440's on-board reference provides a 1.182V ±0.5% output. It features programmable hysteresis and TTL/CMOS compatible outputs that sink and source current. Low Bias currents permit high value divider resistors for typical circuit current drains of <2.5µA.
The low supply current makes the ISL21440 ideal for battery powered devices in battery level or low voltage monitors circuits.
The ISL21440 is a pin-compatible, performance upgrade of both the LTC1440, LTC1540, MAX921 and MAX931.
Applications
- Low Battery Detector
- Low Voltage Reset
- Overvoltage Monitor
- Window Comparator
