LTC2379CMS-18#PBF

Analog To Digital Converters (ADC) Overview

The LTC2379CMS-18#PBF is an 18-bit, 1.6Msps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. Operating from a single 2.5V supply, it features a fully differential input range of ±VREF with VREF spanning 2.5V to 5.1V. The device achieves a typical signal-to-noise ratio (SNR) of 101.2dB and total harmonic distortion (THD) of –120dB at fIN = 2kHz. It guarantees 18-bit no missing codes with a maximum integral nonlinearity (INL) of ±2LSB. Power consumption is 18mW at full sampling rate, scaling down to 18µW in power-down mode. The component utilizes an internal oscillator and supports SPI-compatible serial I/O with daisy-chain capability.

Analog To Digital Converters (ADC) Feature Summary

• 18-bit resolution with guaranteed no missing codes and ±2LSB maximum INL
• High-speed throughput of 1.6Msps with zero pipeline delay or cycle latency
• Low power consumption: 18mW at 1.6Msps and 18µW in power-down mode
• Digital Gain Compression (DGC) function eliminates the need for negative driver supplies

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific temperature grade suffix when ordering. The 'C' in LTC2379CMS-18 indicates a commercial operating range of 0°C to 70°C. Industrial (-40°C to 85°C) and extended industrial (-40°C to 125°C) variants use 'I' and 'H' suffixes respectively. Confirm package availability, as the CMS variant uses a 16-lead MSOP package. Ensure compatibility with host logic voltages via the OVDD pin, which supports 1.8V to 5V interfaces.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high linearity and low power in a compact form factor. The DGC feature is critical if the driving amplifier cannot support a negative supply rail, allowing operation from a single positive supply. Ensure the reference voltage source can provide sufficient current, as the REF pin draws approximately 1.3mA. For systems requiring wider temperature ranges, consider the LTC2379IMS-18 or LTC2379HMS-18 variants instead of the CMS version.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2379-18 family of low-power, high-speed SAR ADCs. It is distinct from the LTC2378-18, which offers a lower 1Msps throughput but similar resolution. The CMS-18 designation specifically identifies the commercial grade version in the MSOP-16 package. Other family members include the IDE-18 and HDE-18 in DFN packages, offering different thermal and footprint characteristics for PCB layout optimization.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified documentation.