LTC2387CUH-18#TRPBF

Overview

The LTC2387CUH-18#TRPBF is an 18-bit, 15Msps successive approximation register (SAR) analog-to-digital converter from Analog Devices Inc. It operates with a differential input range of ±4.096V and features a serial LVDS interface. Key electrical specifications include a typical SNR of 95.7dB at 1MHz input frequency, a maximum INL of ±3LSB, and power dissipation of 125mW at full speed. The device integrates a precision internal reference with a temperature coefficient of ±20ppm/°C. It is housed in a 32-lead 5mm × 5mm QFN package and supports an operating temperature range of 0°C to 70°C.

Feature Summary

• 18-bit resolution with guaranteed no missing codes and 15Msps throughput rate
• Serial LVDS digital interface supporting one-lane and two-lane output modes
• Internal 2.048V reference buffer providing 4.096V differential input range
• Zero pipeline delay and zero cycle latency for high-speed control loops

Applications

• High-speed data acquisition systems
• Imaging applications including CCD and CMOS sensors
• Instrumentation requiring wide dynamic range
• Communications applications with significant signal bandwidth
• Automated test equipment (ATE)

Procurement Notes

Verify the #TRPBF suffix indicates tape and reel packaging containing 2500 units per factory reel. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure compatibility with 5V analog supply and 2.5V digital I/O supplies during procurement planning.

Selection Notes

Select this component when 18-bit linearity and 15Msps sampling are required without pipeline latency. The integrated reference simplifies design by eliminating external voltage references. Consider the LVDS interface requirements for PCB layout and termination resistors. Evaluate power consumption against thermal constraints, noting the 125mW dissipation at maximum sample rate.

Part Context

This part belongs to the LTC2387 family of SAR ADCs, which includes variants with different resolutions and speeds such as the LTC2387-16 and LTC2387-10. The CUH-18 variant specifically denotes the 18-bit resolution, commercial temperature grade, and QFN package. Evaluation boards like DC2290A-A are available for performance verification.

Replacement Considerations

Direct substitutes within the same package and pinout include other LTC2387 variants with adjusted speed or resolution, such as LTC2387IUH-18#TRPBF for extended temperature ranges. Cross-family replacements require verification of interface compatibility and pin definitions.