LTC2389CUK-18#PBF

Overview

The LTC2389CUK-18#PBF is an 18-bit, 2.5Msps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 5V supply and features pin-configurable analog input ranges: ±4.096V fully differential, 0V to 4.096V pseudo-differential unipolar, and ±2.048V pseudo-differential bipolar. The device guarantees 18-bit resolution with no missing codes and achieves a maximum integral nonlinearity (INL) of ±3LSB. It includes a precision internal 4.096V reference with ±20ppm/°C temperature coefficient and dissipates 162.5mW at full throughput.

Feature Summary

• Pin-configurable analog input ranges including fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V).
• Guaranteed 18-bit resolution with no missing codes and maximum INL of ±3LSB.
• Internal 4.096V reference with guaranteed 0.5% initial accuracy and ±20ppm/°C maximum temperature coefficient.
• Supports both parallel and serial I/O interfaces with 1.8V to 5V I/O voltages.

Applications

• Medical imaging systems
• High-speed, wide dynamic range data acquisition
• Industrial process control
• Instrumentation
• Automatic test equipment (ATE)

Procurement Notes

Verify the ordering suffix UK indicates the 48-lead 7mm × 7mm plastic QFN package. Confirm the C grade specifies the commercial operating temperature range of 0°C to 70°C. Ensure the #PBF designation corresponds to lead-free finish and tube packaging as listed in the manufacturer's ordering information.

Selection Notes

Select this component for applications requiring high-speed conversion with precise linearity. The C-grade variant is suitable for environments within 0°C to 70°C; use the I-grade for –40°C to 85°C or H-grade for –40°C to 125°C if wider temperature ranges are required. The QFN package is appropriate for space-constrained PCB layouts.

Part Context

This part belongs to the LTC2389-18 family of 18-bit SAR ADCs. The specific suffix UK identifies the 48-lead QFN package, while the C indicates the commercial temperature grade. Other variants include the LX package (LQFP) and different temperature grades such as I and H.

Replacement Considerations

For equivalent performance in the same package, consider the LTC2389IUK-18#PBF for extended temperature range. For LQFP package alternatives, the LTC2389CLX-18#PBF or LTC2389ILX-18#PBF may be used depending on thermal requirements.