LTC2341-18 - Dual, 18-Bit, 666ksps/ch Differential SoftSpan ADC with Wide Input Common Mode Range

The LTC®2341-18 is an 18-bit, low noise 2-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range inputs. Operating from a 5V supply and using the internal reference and buffer, both channels of this SoftSpanTM ADC can be independently configured on a conversion-by-conversion basis to accept ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V signals. One channel may also be disabled to increase throughput on the other channel.

The wide input common mode range and 105dB CMRR of the LTC2341-18 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±4LSB INL, no missing codes at 18 bits, and 95dB SNR, makes the LTC2341-18 an ideal choice for many applications requiring wide dynamic range.

The LTC2341-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Either one or two lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput.

Features
  • 666ksps per Channel Throughput
  • Two Simultaneous Sampling Channels
  • ±4LSB INL (Maximum)
  • Guaranteed 18-Bit, No Missing Codes
  • Differential, Wide Common Mode Range Inputs
  • Per-Channel SoftSpan Input Ranges: ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V ±5V, 0V to 5V, ±2.5V, 0V to 2.5V
  • 95dB Single-Conversion SNR (Typical)
  • −114dB THD (Typical) at fIN = 2kHz
  • 105dB CMRR (Typical) at fIN = 200Hz
  • Rail-to-Rail Input Overdrive Tolerance
  • Guaranteed Operation to 125°C
  • Integrated Reference and Buffer (4.096V)
  • SPI CMOS (1.8V to 5V) and LVDS Serial I/O
  • Internal Conversion Clock, No Cycle Latency
  • 74mW Power Dissipation (Typical)
  • 32-Lead (5mm × 5mm) QFN Package
Typical Application
LTC2341-18 Typical Application
LTC2341-18 Typical Application
Applications
  • Programmable Logic Controllers
  • Industrial Process Control
  • Medical Imaging
  • High Speed Data Acquisition
Packaging
LTC2341-18 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC2341CUH-18#PBF5x5 QFN-32C$19.29$13.50
LTC2341CUH-18#TRPBF5x5 QFN-32C$19.35$13.56
LTC2341HUH-18#PBF5x5 QFN-32H$25.50$17.85
LTC2341HUH-18#TRPBF5x5 QFN-32H$25.56$17.91
LTC2341IUH-18#PBF5x5 QFN-32I$22.14$15.50
LTC2341IUH-18#TRPBF5x5 QFN-32I$22.20$15.56
Demo Boards
Part NumberDescriptionPrice
DC2581A-ALTC2341-18 Demo Board | Dual, 18-Bit, 666ksps Differential ±5V Input SoftSpan ADC with Wide Input Common Mode Range (req. DC590, DC2026, DC890)$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
DC890BUSB Data Acquisition Controller, for PScope Evaluation Kits (up to 250Mbps, CMOS/LVDS)$300.00
Datasheet
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LTC2341-18 - Dual, 18-Bit, 666ksps/ch Differential SoftSpan ADC with Wide Input Common Mode Range