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Product details

Parameters

VO (V) 1.024, 1.25, 2.048, 2.5, 4.096 Initial accuracy (Max) (%) 0.1 Temp coeff (Max) (ppm/ degree C) 3, 6, 10 Rating Catalog Vin (Min) (V) 1.8 Vin (Max) (V) 5.5 Iq (Typ) (uA) 230, 265 Features Enable pin Iout/Iz (Max) (mA) 8 Operating temperature range (C) 0 to 70 Shutdown current (Typ) (uA) 0.1 open-in-new Find other Series voltage references

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Series voltage references

Features

  • High Initial Accuracy: 0.1%
  • Ultra-Low Noise
  • Low Temperature Coefficient: 3 ppm/°C (A Grade)
  • Low Voltage Operation: 1.8V
  • Low Dropout Voltage: 20 mV (Typical) at 1mA
  • Supply Current: 230 µA (Typical), ≤ 1 µA Disable Mode
  • Enable Pin
  • Output Voltage Options: 1.024 V, 1.25 V, 2.048 V, 2.5 V, and 4.096 V
  • Custom Voltages From 0.5 V to 4.5 V
  • Temperature Range: 0°C to 70°C
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Description

The LM4140 series of precision references are designed to combine high accuracy, low drift, and noise with low power dissipation in a small package.

The LM4140 is the industry’s first reference with output voltage options lower than the bandgap voltage.

The key to the advance performance of the LM4140 is the use of EEPROM registers and CMOS DACs for temperature coefficient curvature correction and trimming of the output voltage accuracy of the device during the final production testing.

The major advantage of this method is the much higher resolution available with DACs than is available economically with most methods used by other bandgap references.

The low input and dropout voltage, low supply current, and output drive capability of the LM4140 makes this product an ideal choice for battery powered and portable applications.

The LM4140 is available in three grades (A, B, C) with 0.1% initial accuracy and 3, 6, and 10 ppm/°C temperature coefficients. For even lower temperature coefficients, contact Texas Instruments.

The device performance is specified over the temperature range 0°C to 70°C, and is available in compact 8-pin package.

For other output voltage options from 0.5 V to 4.5 V, contact Texas Instruments.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM4140 High Precision Low Noise Low Dropout Voltage Reference datasheet (Rev. F) Sep. 16, 2016
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
White papers Voltage reference selection basics white paper (Rev. A) Oct. 23, 2018
Technical articles Find the "Goldilocks" voltage reference for your application Sep. 02, 2016
More literature How to Select the Right Voltage Reference (Rev. A) Jun. 30, 2015
Selection guides Voltage Reference Overview Jul. 26, 2013
Application notes AN-1559 Practical RTD Interface Solutions (Rev. B) May 01, 2013
Application notes AN-1852 Designing With pH Electrodes (Rev. A) May 01, 2013
Application notes Improving Machinery Vibration Analysis Jul. 07, 2006
White papers A precision interface for a Resistance Temperature Detector (RTD) Dec. 01, 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
2499
Description

The DDC2256AEVM evaluation module  (EVM)  is  an  evaluation  kit  for the DDC2256A,  a  256-channel,  current  input,  24-bit analog-to-digital (A/D) converter. The EVM kit, comprised of a DUT board and a capture board, contains two DDC2256A (...)

Features
  • All-in-one solution for evaluating two DDC2256A devices in a system-like setting
  • On-board FPGA, memory, and USB interface allow for data capture and analysis of large sample datasets
  • Flexible supply configurations for simple or advanced experimentation
  • Various input voltage configurations allow for (...)
EVALUATION BOARDS Download
document-generic User guide
Description

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

The (...)

Features
  • Simplifies prototyping of SMT IC’s
  • Supports 6 common package types
  • Low Cost

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
  • (...)

Reference designs

REFERENCE DESIGNS Download
Transient and Digital Fault Recorder AFE Using Differential Amplifiers and HS ADC Reference Design
TIDA-00499 While Digital Fault Recorders (DFR) can detect transients in 17/20 μs at 60/50 Hz, Transient Recorders capture disturbances that can peak and decay well within a microsecond. This TI Design demonstrates the capturing of transient inputs at up to 1 MHz for Digital Fault Recorder and 25 MHz for (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

Ordering & quality

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