LTC2385CUH-18#PBF

Overview

The LTC2385CUH-18#PBF is an 18-bit, 5Msps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from 5V and 2.5V supplies with a fully differential ±4.096V input range. Key electrical specifications include a typical SNR of 95.7dB at 1MHz input frequency, 101dB SFDR, and ±1.5LSB maximum INL. The device dissipates 78mW at full throughput and features a serial LVDS interface with one-lane or two-lane output modes. It includes an internal 2.048V reference with a buffer and guarantees 18-bit no missing codes.

Feature Summary

• 18-Bit Resolution with Guaranteed No Missing Codes
• 5Msps Sampling Rate with Zero Pipeline Latency
• Serial LVDS Digital Interface for High-Speed Data Transfer
• Internal 2.048V Reference with Integrated Buffer

Applications

• High Speed Data Acquisition
• Imaging Systems
• Communications Equipment
• Control Loops
• Instrumentation
• Automated Test Equipment (ATE)

Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tube packaging. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure compatibility with the 32-lead QFN package dimensions during PCB layout planning.

Selection Notes

Select this component when low latency is critical for control loops, as it lacks pipeline delay. Choose between one-lane or two-lane LVDS modes based on available data lines and required interface data rate. Ensure the system can support the required 5V analog supply and 2.5V digital/I/O supplies.

Part Context

This part belongs to the LTC238x-18 family of 18-bit SAR ADCs. It shares architectural similarities with the LTC2387-18 (15Msps) and LTC2389-18 (2.5Msps), differing primarily in sampling speed and pin configuration options. All variants utilize the same 32-pin QFN package and LVDS interface technology.

Replacement Considerations

Direct functional substitutes within the same package include the LTC2387CUH-18#PBF for higher speed requirements or the LTC2389CLX-18#PBF if pin-configurable inputs are needed. Verify that the replacement supports the required 5V supply voltage and LVDS interface timing.