The ISL21440 is a micropower, FGA reference, and comparator on a single chip. Drawing less than 5μA supply current across 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 monitor circuits.
The ISL21440 is a pin-compatible, performance upgrade of the LTC1440, LTC1540, MAX921, and MAX931.
Key Features
- 5μA supply current across 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
Applications
- Low battery detector
- Low voltage reset
- Overvoltage monitor
- Window comparator
Order Information| Part Number | Package Type | Weight(g) | Pins | MSL Rating | Peak Temp (°C) | RoHS Status |
|---|
|
| ISL21440IUZ-T13 | 8 Ld MSOP T+R | 0.025 | 8 | 2 | 260 | RoHS |
|
|
| ISL21440IRTZ | 8 Ld DFN | 0.01962 | 8 | 1 | 260 | RoHS |
|
|
| ISL21440IUZ | 8 Ld MSOP | 0.025 | 8 | 2 | 260 | RoHS |
|
|
| ISL21440IRTZ-T13 | 8 Ld DFN T+R | 0.01962 | 8 | 1 | 260 | RoHS |
|
|
