ISL21440

Micropower Voltage Reference with Comparator

Product Status: Mass Production

OVERVIEW

The ISL21440 is a micropower, FGA reference, and comparator on a single chip. Drawing less than 6.5μA 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

  • 6.5μA supply current across the 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

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL21440
Basic Information
Production Status
Mass Production
VOUT (V)
1.182
IS (max)
6.5 µA
VS (min)
2 V
VS (max)
11 V
Min Operating Temperature
-40 °C
Max Operating Temperature
125 °C
Initial Accuracy (% Vout)
0.5
Technology
Floating Gate Array
ISOURCE (max) (mA)
2
ISINK (max) (mA)
0.01
Qualification Level
Standard
Supply Voltage Vs Range (V)
2.0 to 11
Initial Accuracy (mV)
± 0.6 mV
Can Sample
YES
Temperature Range
-40 to +125