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Product details

Parameters

VO (V) 1.235 Reference voltage Fixed Initial accuracy (Max) (%) 1 Rating Catalog VO adj (Min) (V) 1.235 VO adj (Max) (V) 1.235 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
    • LM285-1.2: 10 μA to 20 mA
    • LM385-1.2: 15 μA to 20 mA
    • LM385B-1.2: 15 μA to 20 mA
  • 1% and 2% Initial Voltage Tolerance
  • Reference Impedance
    • LM385-1.2: 1 Ω MAX at 25°C
    • All devices: 1.5 Ω MAX over Full
      Temperature Range
  • Very Low Power Consumption
  • Interchangeable with Industry Standard
    LM285-1.2 and LM385-1.2
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Description

These micropower, two-terminal, band-gap voltage references operate over a 10-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 them 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 allows them to replace older references with tighter-tolerance parts.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 2
Type Title Date
* Datasheet LMx85-1.2, LM385B-1.2 Micropower Voltage References datasheet (Rev. J) Jan. 27, 2015
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019

Design & development

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Design tools & simulation

SIMULATION TOOLS 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 TOOLS 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

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