LTC2377IMS-18#PBF

Analog To Digital Converters (ADC) Overview

The LTC2377IMS-18#PBF is an 18-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 2.5V supply and supports a fully differential input range of ±VREF, where VREF ranges from 2.5V to 5.1V. The device achieves a maximum integral nonlinearity (INL) of ±1.75 LSB with guaranteed 18-bit no missing codes performance. At a sampling rate of 500ksps, it consumes 6.8mW of power while delivering a typical signal-to-noise ratio (SNR) of 102dB and total harmonic distortion (THD) of –124dB at fIN = 2kHz. The component features an internal oscillator, auto power-down capability, and digital gain compression functionality.

Analog To Digital Converters (ADC) Feature Summary

• 18-bit resolution with guaranteed no missing codes and ±1.75LSB maximum INL
• 500ksps throughput rate with no pipeline delay or cycle latency
• Low power consumption: 6.8mW at 500ksps and 6.8µW in power-down mode
• Digital Gain Compression (DGC) function eliminates the need for negative driver amplifier supplies

Analog To Digital Converters (ADC) Applications

• Medical imaging systems
• 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 that the specific ordering suffix #PBF corresponds to the lead-free tube packaging variant rather than the tape and reel option (#TRPBF). Confirm the temperature grade 'I' indicates operation within the –40°C to 85°C range as specified in the order information table. Ensure compatibility with the 16-lead MSOP package dimensions before integration.

Analog To Digital Converters (ADC) Selection Notes

Select this model when a 500ksps sampling rate is sufficient for the application, distinguishing it from the faster LTC2378 series. Choose the IMS-18 variant over the CMS-18 if industrial temperature ratings are required. Consider the DGC feature if the driving amplifier cannot support a negative supply rail, allowing for single-supply operation with reduced headroom requirements.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC2377-18 family of low noise, low power SAR ADCs. It shares architectural similarities with the LTC2378-18 but offers a lower 500ksps throughput compared to the latter's 1Msps rate. The IMS-18 designation specifically identifies the industrial temperature grade version housed in a 16-lead MSOP package.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2377IMS-18#TRPBF serves as the identical functional replacement in tape and reel packaging. For applications requiring higher throughput, the LTC2378IMS-18#PBF provides 1Msps performance with similar pinout and electrical characteristics.