LTC2379-18 - 18-Bit, 1.6Msps, Low Power SAR ADC with 101.2dB SNR


  • 1.6Msps Throughput Rate
  • ±2LSB INL (Max)
  • Guaranteed 18-Bit No Missing Codes
  • Low Power: 18mW at 1.6Msps, 18μW at 1.6ksps
  • 101.2dB SNR (typ) at fIN = 2kHz
  • –120dB THD (typ) at fIN = 2kHz
  • Digital Gain Compression (DGC)
  • Guaranteed Operation to 125°C
  • 2.5V Supply
  • Fully Differential Input Range ±VREF
  • VREF Input Range from 2.5V to 5.1V
  • No Pipeline Delay, No Cycle Latency
  • 1.8V to 5V I/O Voltages
  • SPI-Compatible Serial I/O with Daisychain Mode
  • Internal Conversion Clock
  • 16-pin MSOP and 4mm × 3mm DFN Packages

Typical Application

LTC2379-18 Typical Application
LTC2379-18 Typical Application


The LTC®2379-18 is a low noise, low power, high speed 18-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2379-18 has a ±VREF fully differential input range with VREF ranging from 2.5V to 5.1V. The LTC2379-18 consumes only 18mW and achieves ±2LSB INL maximum, no missing codes at 18‑bits with 101.2dB SNR.

The LTC2379-18 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisychain mode. The fast 1.6Msps throughput with no cycle latency makes the LTC2379-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2379-18 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate.

The LTC2379-18 features a unique digital gain compression (DGC) function, which eliminates the driver amplifier’s negative supply while preserving the full resolution of the ADC. When enabled, the ADC performs a digital scaling function that maps zero-scale code from 0V to 0.1 • VREF and full-scale code from VREF to 0.9 • VREF. For a typical reference voltage of 5V, the full-scale input range is now 0.5V to 4.5V, which provides adequate headroom for powering the driving amplifier from a single 5.5V supply.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC2379CDE-18#PBF 4x3 DFN-16 DE C 05-08-1732 Yes
LTC2379CDE-18#TRPBF 4x3 DFN-16 DE C 05-08-1732 Yes
LTC2379CMS-18#PBF MS-16 MS C 05-08-1669 Yes
LTC2379CMS-18#TRPBF MS-16 MS C 05-08-1669 Yes
LTC2379HMS-18#PBF MS-16 MS H 05-08-1669 Yes
LTC2379HMS-18#TRPBF MS-16 MS H 05-08-1669 Yes
LTC2379IDE-18#PBF 4x3 DFN-16 DE I 05-08-1732 Yes
LTC2379IDE-18#TRPBF 4x3 DFN-16 DE I 05-08-1732 Yes
LTC2379IMS-18#PBF MS-16 MS I 05-08-1669 Yes
LTC2379IMS-18#TRPBF MS-16 MS I 05-08-1669 Yes

LTC2379-18 Package Drawing
LTC2379-18 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC2379CDE-18#PBF 4x3 DFN-16 C $42.79 $29.95 Yes
LTC2379CDE-18#TRPBF 4x3 DFN-16 C $30.01 Yes
LTC2379CMS-18#PBF MS-16 C $42.79 $29.95 Yes
LTC2379CMS-18#TRPBF MS-16 C $30.01 Yes
LTC2379HMS-18#PBF MS-16 H $56.58 $39.61 Yes
LTC2379HMS-18#TRPBF MS-16 H $39.67 Yes
LTC2379IDE-18#PBF 4x3 DFN-16 I $49.20 $34.44 Yes
LTC2379IDE-18#TRPBF 4x3 DFN-16 I $34.50 Yes
LTC2379IMS-18#PBF MS-16 I $49.20 $34.44 Yes
LTC2379IMS-18#TRPBF MS-16 I $34.50 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1783A-E LTC2379-18 with LTC6655-5/LT6350 Demo Board | 18-Bit, 1.6Msps, SAR ADC with 101dB SNR. Req DC718 or DC2026 $150.00
DC1805A-E LTC6362 with 1.6Msps 18-bit LTC2379-18 Demo Board | SAR ADC, LTC6655-5. Req DC718 or DC2026 $150.00
DC1858A Low Noise, Low Distortion Sine Wave Generator for LTC2379/LTC2369 SAR ADC Family, Fout=2kHz $500.00
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Companion Boards

Part Number Description Price Documentation
DC2026C Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform $75.00
DC718C USB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps) $300.00
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Click here to view our complete list of demo boards


  • Medical Imaging
  • High Speed Data Acquisition
  • Portable or Compact Instrumentation
  • Industrial Process Control
  • Low Power Battery-Operated Instrumentation
  • ATE

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice IV - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

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