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

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.

  • 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
  • Medical Imaging
  • High Speed Data Acquisition
  • Portable or Compact Instrumentation
  • Industrial Process Control
  • Low Power Battery-Operated Instrumentation
  • ATE
LTC2379-18 Package Drawing
LTC2379-18 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC2379CDE-18#PBF4x3 DFN-16C$42.79$29.95
LTC2379CDE-18#TRPBF4x3 DFN-16C$30.01
LTC2379IDE-18#PBF4x3 DFN-16I$49.20$34.44
LTC2379IDE-18#TRPBF4x3 DFN-16I$34.50
Demo Boards
Part NumberDescriptionPrice
DC1783A-ELTC2379-18 with LTC6655-5/LT6350 Demo Board | 18-Bit, 1.6Msps, SAR ADC with 101dB SNR. Req DC718 or DC2026$150.00
DC1805A-ELTC6362 with 1.6Msps 18-bit LTC2379-18 Demo Board | SAR ADC, LTC6655-5. Req DC718 or DC2026$150.00
DC1858ALow Noise, Low Distortion Sine Wave Generator for LTC2379/LTC2369 SAR ADC Family, Fout=2kHz$500.00
Companion Boards
Part NumberDescriptionPrice
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
DC718CUSB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps)$300.00
Application Note
Design Note
Reliability Data
Product Selector Card
LT Journal
Press Release
Software and Simulation
CAD Symbol
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Precision Signal Chain Products Selector Guide
SAR ADC Drivers
SAR ADC Input Types
Low Power, DC Accurate Drivers for 18-Bit ADCs
18-Bit, 1.6Msps, Serial SAR ADC Achieves Industry-Leading 101dB SNR Performance
DC1783A_REVA FPGA/CPLD Source Code
LTC2379-18 Footprints and Symbols