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Analog Devices Inc. LTC2341-16/-18 Dual Differential SoftSpan™ ADCs

Analog Devices Inc. LTC2341-16 / LTC2341-18 16- and 18-bit SoftSpan™ Analog-to-Digital Converters are 666ksps, 2-channel simultaneous sampling successive approximation register (SAR) ADCs. The ADCs offer differential, wide common-mode range inputs. Both channels of the LTC234 SoftSpan ADCs 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. Designers can disable one channel of the ADC to increase throughput on the other channel.

The wide input common-mode range and 105dB CMRR of the analog inputs enable the LTC2341-16 and LTC2341-18 to directly digitize a variety of signals. This process simplifies signal chain design. In addition to input signal flexibility, these ADCs offer ±4LSB (18-bit) or ±1.25LSB (16-bit) INL, no missing codes, and 95db (18-bit) or 93.4dB (16-bit) SNR. Operating from a low 5V voltage supply, the Analog Devices Inc. LTC2341-16/-18 ADCs are ideal for use in a variety of applications requiring a wide dynamic range.

Features

  • 666ksps per channel throughput
  • Two simultaneous sampling channels
  • ±1.25LSB (16-bit) INL, ±4LSB INL (18-bit)
  • Guaranteed 16-bit/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
  • 93.4dB single-conversion SNR (16-bit); 95dB single-conversion SNR (18-bit)
  • −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

Applications

  • Programmable logic controllers
  • Industrial process control
  • Medical imaging
  • High speed data acquisition

LTC2341-16 Typical Application

Application Circuit Diagram - Analog Devices Inc. LTC2341-16/-18 Dual Differential SoftSpan™ ADCs

LTC2341-18 Typical Application

Block Diagram - Analog Devices Inc. LTC2341-16/-18 Dual Differential SoftSpan™ ADCs

Additional Resources

Published: 2017-04-28 | Updated: 2022-03-11