LTC2385IUH-18#TRPBF

Overview

The LTC2385IUH-18#TRPBF 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 differential input range of ±4.096V. Key electrical specifications include a typical SNR of 95.7dB at 1MHz input frequency, an SFDR of 101dB, and a maximum INL of ±1.5 LSB. The device features an internal reference buffer, serial LVDS interface, and dissipates 78mW at full throughput.

Feature Summary

• 18-bit resolution with guaranteed no missing codes
• 5Msps sampling rate with zero pipeline latency
• Internal 2.048V reference with ±20ppm/°C temperature coefficient
• Serial LVDS digital interface supporting one-lane or two-lane modes

Applications

• High speed data acquisition systems
• Imaging applications requiring wide dynamic range
• Instrumentation and control loops
• Communications requiring significant signal bandwidth

Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging. Confirm the 'I' grade designation corresponds to the –40°C to 85°C operating temperature range. Ensure compatibility with the 32-lead QFN package dimensions for PCB layout.

Selection Notes

Select this component when low noise and high linearity are required at 5Msps speeds. The internal reference simplifies design but requires bypassing REFBUF with a 10µF capacitor. Consider the LVDS interface requirements for clock distribution and data routing in high-speed layouts.

Part Context

This part belongs to the LTC2385-18 series, which includes variants like LTC2385CUH-18 for commercial temperature ranges. The IUH suffix specifies industrial temperature operation and the QFN-32 package. It is distinct from higher-speed models like the LTC2387 or lower-speed models like the LTC2386.

Replacement Considerations

Public confirmed substitute part numbers: LTC2385IUH-18#PBF (tube packaging). Other family members such as LTC2386IUH-18 offer different throughput rates.