LTC2381IDE-16#PBF

Overview

The LTC2381IDE-16#PBF is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 2.5V supply with a ±2.5V fully differential input range and consumes 3.25mW at maximum throughput. The device features an SPI-compatible serial interface supporting 1.8V to 5V logic levels and includes a daisy-chain mode. Key performance metrics include ±2LSB maximum integral nonlinearity, guaranteed 16-bit no missing codes, and 92dB typical SNR. The part is housed in a 16-lead 4mm × 3mm plastic DFN package and supports an operating temperature range of –40°C to 85°C.

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 I/O with daisy-chain capability and internal conversion clock

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tape and reel packaging availability. Confirm the IDE suffix corresponds to the industrial temperature grade (-40°C to 85°C) and the DE package type (16-lead 4mm × 3mm DFN). Ensure compatibility with external reference voltage requirements of 2.4V to 2.6V for optimal performance.

Selection Notes

Select this component when a high-speed, low-power 16-bit SAR ADC is required with a fully differential input. The extended 3.25µs acquisition time allows for simpler driver circuits compared to faster SAR ADCs. Ensure the system can provide a stable 2.5V analog supply and a separate digital I/O supply between 1.71V and 5.25V. Consider the H-grade variant if operation up to 125°C is necessary.

Part Context

This part belongs to the LTC2381-16 family of low noise, low power SAR ADCs. The IDE-16 designation specifies the industrial temperature range and DFN package. Other variants in the family include CMS (commercial), IMS (industrial MSOP), and HMS/HDE (high-temperature) options, offering flexibility in package style and thermal performance while maintaining identical electrical characteristics.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2381HDE-16#PBF for extended temperature operation up to 125°C. For commercial applications, LTC2381CDE-16#PBF is suitable. If a different package is acceptable, the MSOP versions such as LTC2381IMS-16#PBF offer the same electrical performance in a 16-lead MSOP footprint.