LTC2368-18 - 18-Bit, 1Msps, Pseudo-Differential Unipolar SAR ADC with 97dB SNR

The LTC®2368-18 is a low noise, low power, high speed 18-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2368-18 has a 0V to VREF pseudo-differential unipolar input range with VREF ranging from 2.5V to 5.1V. The LTC2368-18 consumes only 13.5mW and achieves ±2.5LSB INL maximum, no missing codes at 18 bits with 97dB SNR.

The LTC2368-18 has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisy-chain mode. The fast 1Msps throughput with no cycle latency makes the LTC2368-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2368-18 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate.

  • 1Msps Throughput Rate
  • ±2.5LSB INL (Max)
  • Guaranteed 18-Bit No Missing Codes
  • Low Power: 13.5mW at 1Msps, 13.5μW at 1ksps
  • 97dB SNR (Typ) at fIN = 2kHz
  • –120dB THD (Typ) at fIN = 2kHz
  • Guaranteed Operation to 125°C
  • 2.5V Supply
  • Pseudo-Differential Unipolar Input Range: 0V to 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 Daisy-Chain Mode
  • Internal Conversion Clock
  • 16-Lead MSOP and 4mm × 3mm DFN Packages
Typical Application
LTC2368-18 Typical Application
LTC2368-18 Typical Application
LTC2368-18 Package Drawing
LTC2368-18 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC2368CDE-18#PBF4x3 DFN-16C$35.00$24.50
LTC2368CDE-18#TRPBF4x3 DFN-16C$24.56
LTC2368IDE-18#PBF4x3 DFN-16I$40.25$28.18
LTC2368IDE-18#TRPBF4x3 DFN-16I$28.24
Demo Boards
Part NumberDescriptionPrice
DC1796A-FLTC6360 driving LTC2368-18 Demo Board | 18-bit, 1Msps SAR ADC (req. DC590 or DC718)$150.00
DC1813A-FLTC2368-18 with LTC6655-5/LT6202 Demo Board |18-Bit, 1Msps, Pseudo-Differential Unipolar SAR ADC with 97dB SNR. Req DC718 or DC590$150.00
Companion Boards
Part NumberDescriptionPrice
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
DC590BIsolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards$50.00
DC718CUSB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps)$300.00
Reliability Data
Product Selector Card
Software and Simulation
CAD Symbol
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Precision Signal Chain Products Selector Guide
SAR ADC Drivers
SAR ADC Input Types
DC2289A CPLD Source Code
LTC2368-18 Footprints and Symbols
LTC2370 - DC1796A Linduino .INO File
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LTC2370 - Linduino Header File
LTC2370 - Linduino.CPP File