LTC2381IDE-16#TRPBF

Overview

The LTC2381IDE-16#TRPBF is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices. It operates from a single 2.5V supply and features a ±2.5V fully differential input range. The device consumes 3.25mW at full throughput and includes an internal oscillator for conversion timing. Key electrical specifications include a typical SNR of 92dB at 20kHz input, ±2LSB maximum integral nonlinearity (INL), and guaranteed 16-bit no missing codes. It utilizes an SPI-compatible serial interface with daisy-chain capability and supports I/O voltages from 1.8V to 5V.

Feature Summary

• 16-bit resolution with 250ksps throughput and no cycle latency
• Low power consumption: 3.25mW at 250ksps, scaling down to 13µW at 1ksps
• Extended acquisition time of 3.25µs enables use of low-power ADC drivers
• SPI-compatible serial interface supporting 1.8V, 2.5V, 3.3V, and 5V logic levels

Applications

• Medical imaging systems
• High-speed data acquisition
• Portable or compact instrumentation
• Industrial process control
• Low power battery-operated instrumentation

Procurement Notes

Verify the #TRPBF suffix indicates tape and reel packaging. Confirm the IDE suffix corresponds to the industrial temperature range of –40°C to 85°C and the DE package (16-lead 4mm × 3mm plastic DFN). Ensure compatibility with external reference requirements, as the device requires an external 2.5V reference input.

Selection Notes

Select this component when a 16-bit SAR ADC with low power dissipation and extended acquisition time is required. The 3.25µs acquisition time allows for simpler driver circuits compared to faster SAR ADCs. Verify that the application can accommodate the need for an external voltage reference, as the LTC2381-16 does not include an internal reference source.

Part Context

This part belongs to the LTC2381-16 family of low-power, high-speed SAR ADCs. The IDE-16#TRPBF variant specifically denotes the industrial temperature grade (-40°C to 85°C) and the 16-lead DFN package in tape and reel format. Other variants in the series include CMS (commercial temp) and HMS (extended temp) packages.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing, ensure the new component matches the 16-bit resolution, 250ksps speed, differential input architecture, and MSOP/DFN pinout compatibility.