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Product details

Parameters

VO (V) 2.5 Reference voltage Fixed Initial accuracy (Max) (%) 1.5 Rating Catalog VO adj (Min) (V) 2.5 VO adj (Max) (V) 2.5 Iz for regulation (Min) (uA) 8 Operating temperature range (C) -40 to 85 Iout/Iz (Max) (mA) 20 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 TO-92 (LP) 3 19 mm² 5.2 x 3.68 open-in-new Find other Shunt voltage references

Features

  • Operating Current Range 20 µA to 20 mA
  • 1.5% and 3% Initial Voltage Tolerance
  • Reference Impedance
    • LM385 1 Ω Maximum at 25°C
    • All Devices 1.5 Ω Maximum Over Full Temperature Range
  • Very Low Power Consumption

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Description

The LMx85-2.5 and LM385B are micropower, two-terminal, band-gap voltage references that operate over a 20-µA to 20-mA current range and feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming provides tight voltage tolerance. The band-gap reference for these devices has low noise and long-term stability.

The design makes these devices exceptionally tolerant of capacitive loading and, thus, easier to use in most reference applications. The wide dynamic operating temperature range accommodates varying current supplies, with excellent regulation.

The extremely low power drain of this series makes these devices useful for micropower circuitry. These voltage references can be used to make portable meters, regulators, or general-purpose analog circuitry, with battery life approaching shelf life. The wide operating current range of these voltage references allows them to replace older references with tighter-tolerance parts.

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Technical documentation

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Type Title Date
* Datasheet LMx85-2.5, LM385B-2.5 Micropower Voltage References datasheet (Rev. L) Feb. 16, 2018
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019

Design & development

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Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOL Download
Shunt voltage reference external resistor quick-start calculator
SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)
Features
  • Case-specific tool to calculate external resistor value associated with shunt voltage reference
  • Input fields for: voltage reference, supply voltage, load current and Iq bound values
  • Real-time effects of input values on schematic
  • Quick indicators notifying user of valid and invalid outputs
  • Error messages (...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
TO-92 (LP) 3 View options

Ordering & quality

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