LTC2381IMS-16#PBF

Overview

The LTC2381IMS-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 and features a ±2.5V fully differential input range. The device consumes 3.25mW at maximum throughput and achieves an integral nonlinearity (INL) of ±2 LSB max with no missing codes. Key electrical parameters include a typical signal-to-noise ratio (SNR) of 92 dB, a sampling rate of 250 ksps, and an extended acquisition time of 3.25µs. It utilizes an SPI-compatible serial interface supporting 1.8V to 5V logic levels.

Feature Summary

• 16-bit resolution with guaranteed no missing codes and ±2 LSB max INL
• Low power consumption of 3.25mW at 250ksps, scaling down to 13µW at 1ksps
• Extended 3.25µs acquisition time enables the use of low-power ADC drivers
• SPI-compatible serial interface with daisy-chain mode support

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 suffix #PBF indicates lead-free finish and tube packaging. Confirm the 'I' grade designation corresponds to the –40°C to 85°C operating temperature range. Ensure the source documentation matches the manufacturer's official specifications for the IMS package variant.

Selection Notes

Select this component when a 16-bit SAR ADC with low power dissipation and high speed is required. The extended acquisition time allows for simpler driver circuits compared to standard SAR architectures. Ensure the system requires a 2.5V analog supply and an external reference voltage between 2.4V and 2.6V.

Part Context

This part belongs to the LTC2381-16 series, which includes variants with different temperature grades (C, I, H) and packages (MSOP, DFN). The IMS-16#PBF specifically denotes the industrial temperature grade in a 16-lead MSOP package. Other series members may offer wider temperature ranges or alternative form factors while maintaining identical electrical performance.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Replacement selection should focus on matching the 16-bit resolution, 250ksps throughput, differential input architecture, and pin compatibility if footprint constraints exist.