DATASHEET
ISL21440 FN6532
Rev.5.00
Oct 25, 2017 Micropower Voltage Reference with Comparator
The ISL21440 is a micropower, FGA reference, and comparator
on a single chip. Drawing less than 6.5ВµA 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. Features 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 <2.5ВµA. Comparator with user programmable hysteresis The low supply current makes the ISL21440 ideal for battery
powered devices in battery level or low voltage monitor
circuits. Applications The ISL21440 is a pin-compatible, performance upgrade of
the LTC1440, LTC1540, MAX921, and MAX931. Low voltage reset Related Literature Window comparator 6.5ВµA supply current across full temperature range Wide supply range . 2V to 11V Precision 1.182V В±0.5% voltage reference Temperature range . .-40В°C to +125В°C 8 Ld MSOP and 8 Ld TDFN packages Pin compatible upgrade to MAX921 and LTC1440 Low battery detector Overvoltage monitor For a full list of related documents, visit our website
-ISL21440 product page VDD
VBAT 1.190 IN+
+ 1.8M OUT 1.184 -HYST
20k 1.186 LoBAT-ISL21440
REF VREF (V) IN-V+ = 3V 1.188 V+ 2.4M V+ = 5V 1.182
1.180
1.178 V+ = 2V 1.176 …
