LTC2378CMS-20#PBF

Analog To Digital Converters (ADC) Overview

The LTC2378CMS-20#PBF is a 20-bit, 1Msps low power successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. Operating from a single 2.5V supply, it features a ±VREF fully differential input range with VREF spanning 2.5V to 5.1V. The device achieves a typical signal-to-noise ratio of 104dB and total harmonic distortion of –125dB at 2kHz input frequency. It guarantees no missing codes at 20 bits with a maximum integral nonlinearity of ±2ppm. Power consumption is 21mW at full sampling rate and drops to 21µW in power-down mode.

Analog To Digital Converters (ADC) Feature Summary

• 20-bit resolution with guaranteed no missing codes and ±2ppm maximum INL
• 1Msps throughput rate with internal conversion clock and no pipeline delay
• Low power operation: 21mW at 1Msps, 21µW in power-down mode
• Digital Gain Compression (DGC) function for single-supply amplifier driving

Analog To Digital Converters (ADC) Applications

• Medical Imaging
• High Speed Data Acquisition
• Portable or Compact Instrumentation
• Industrial Process Control
• Low Power Battery-Operated Instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix #PBF indicates lead-free packaging and tube shipping configuration. Confirm the CMS suffix corresponds to the MSOP package and commercial temperature range (0°C to 70°C). Ensure compatibility with the required 16-lead plastic MSOP footprint and exposed pad soldering requirements for thermal management.

Analog To Digital Converters (ADC) Selection Notes

Select this component when 20-bit precision and 1Msps speed are required within a low power budget. The DGC feature simplifies driver amplifier design by allowing single-supply operation. Ensure the reference voltage is within the 2.5V to 5.1V range and that the host interface supports the SPI-compatible serial I/O with appropriate logic levels between 1.8V and 5V.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2378 family of high-speed, low-power SAR ADCs. The CMS-20 variant specifically denotes the 20-bit resolution version in the MSOP package with commercial temperature grading. Other variants include the IDE-20 for industrial temperatures and DFN packages, offering flexibility in thermal and spatial constraints while maintaining identical electrical performance characteristics.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices marketing for parts specified with wider operating temperature ranges or alternative package options such as the DFN variant.