LTC1865CMS#PBF

Analog To Digital Converters (ADC) Overview

The LTC1865CMS#PBF is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It features a software-selectable 2-channel multiplexer and an adjustable reference input within a 10-lead MSOP package. Operating on a single 5V supply, it draws 850μA at maximum sampling rates, with auto-shutdown reducing current to 2μA at 1ksps. The device supports SPI/MICROWIRE compatible serial I/O and guarantees operation up to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• 16-Bit Resolution with 250ksps Sampling Rate
• Software-Selectable 2-Channel Multiplexer
• Adjustable Reference Input Pin
• Auto Shutdown Mode Reduces Current to 2μA

Analog To Digital Converters (ADC) Applications

• High Speed Data Acquisition
• Portable or Compact Instrumentation
• Low Power Battery-Operated Instrumentation
• Isolated and/or Remote Data Acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix for temperature range and packaging. The CMS designation indicates commercial grade (0°C to 70°C) in a 10-lead MSOP package. Confirm RoHS compliance status and lead finish requirements against current manufacturing specifications before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high resolution and moderate speed in a compact form factor. Ensure the external reference voltage matches the required input span, as the MSOP version allows adjustable VREF. Verify that the source impedance is low enough to settle within the sampling window or use a buffer amplifier.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1864/LTC1865 family of µPower ADCs. While the LTC1864 offers a single differential channel, the LTC1865 provides two channels via a multiplexer. Both share identical electrical characteristics and pinouts for power and digital interfaces, differing primarily in analog input configuration.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1865 is pin-compatible with the 12-bit LTC1860 and LTC1861. It serves as a direct upgrade path for systems requiring higher resolution without changing the PCB layout.