LTC2389CLX-16#PBF

Overview

The LTC2389CLX-16#PBF is a 16-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 16-bit resolution with no missing codes and achieves a maximum integral nonlinearity (INL) of ±1LSB. Typical performance includes 96.0dB SNR in fully differential mode and -116dB total harmonic distortion at a 2kHz input frequency. It incorporates an internal precision 4.096V reference with ±20ppm/°C temperature coefficient and dissipates 162.5mW at full throughput.

Feature Summary

• 2.5Msps sampling rate with no pipeline delay or cycle latency
• Pin-configurable analog inputs for fully differential, pseudo-differential unipolar, and bipolar modes
• Internal 4.096V reference with 0.5% initial accuracy and integrated buffer
• Parallel and serial I/O interfaces supporting 1.8V to 5V logic levels

Applications

• Medical imaging systems
• High-speed wide dynamic range data acquisition
• Industrial process control
• Test and measurement instrumentation
• Automatic test equipment (ATE)

Procurement Notes

Verify the ordering suffix #PBF indicates lead-free finish and tray packaging. Confirm the 'C' grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure compatibility with the 48-lead LQFP package dimensions for PCB layout.

Selection Notes

Select this component when a 16-bit resolution is sufficient for applications requiring up to 2.5Msps throughput. The internal reference simplifies design compared to external reference solutions. Verify that the required input signal range matches one of the three pin-configurable options to avoid additional signal conditioning circuitry.

Part Context

This part belongs to the LTC2389 family of high-speed SAR ADCs. The CLX variant specifically denotes the commercial temperature grade housed in a 48-lead 7mm × 7mm plastic LQFP package. It shares architectural similarities with the 18-bit LTC2389-18 but offers lower resolution and potentially different pin configurations for address bits.

Replacement Considerations

The LTC2389ILX-16#PBF serves as a direct replacement for extended industrial temperature operation (-40°C to 85°C). The LTC2389HLX-16#PBF provides high-grade performance over the full -40°C to 125°C range. Both maintain identical electrical specifications and pinouts.