LTC2321CUFD-16#PBF

Analog To Digital Converters (ADC) Overview

The LTC2321CUFD-16#PBF is a dual-channel, 16-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 3.3V or 5V supply and features an 8VP-P differential input range with a wide common mode range. The device provides a throughput of 2Msps per channel with no cycle latency. Key electrical specifications include ±4LSB typical integral nonlinearity, 81dB signal-to-noise ratio at fIN = 500kHz, and -90dB total harmonic distortion. It integrates low-drift internal references of 2.048V or 4.096V and supports CMOS or LVDS serial interfaces.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel architecture providing independent 16-bit conversion for two differential inputs simultaneously.
• Wide input common mode range allowing flexible signal conditioning without configuration requirements.
• Integrated temperature-compensated reference buffers with low drift characteristics for system simplification.
• Flexible digital interface supporting both CMOS and LVDS modes for high-speed data transfer compatibility.

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems
• Multiphase motor control
• Optical networking equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature grade. The #PBF designation indicates lead-free finish and tape and reel availability may differ based on the suffix. Confirm the operating temperature range matches the application environment, as the 'C' grade covers 0°C to 70°C while other grades offer extended ranges. Ensure the host logic voltage aligns with the OVDD supply requirements for the selected interface mode.

Analog To Digital Converters (ADC) Selection Notes

Select this component when dual-channel simultaneous sampling is required with 16-bit resolution at 2Msps. Consider the wide common mode range if input signals vary significantly relative to ground. Evaluate power consumption in nap and sleep modes if energy efficiency during inactive periods is critical. Verify that the SPI-compatible serial interface timing meets the system clock constraints.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2321-16 family of dual SAR ADCs. It shares functional similarities with the LTC2325-16 but differs in channel count and package configuration. The UFD package is a 28-lead 4mm x 5mm plastic QFN. It is designed for applications requiring high accuracy and speed in a compact form factor.

Analog To Digital Converters (ADC) Replacement Considerations

LTC2321IUFD-16#PBF offers the same functionality with an extended industrial temperature range (-40°C to 85°C). LTC2321HUFD-16#PBF provides automotive-grade operation up to 125°C. These parts are pin-compatible and functionally identical regarding electrical performance.

Analog To Digital Converters (ADC) FAQ

What is the maximum sampling rate per channel?

The LTC2321-16 supports a maximum sampling frequency of 2Msps per channel.

How is the internal reference disabled?

The internal reference buffers can be disabled by grounding the REFINT pin, allowing an external reference voltage between 1.25V and VDD to drive the REFOUT pins.

What is the typical integral nonlinearity error?

The typical integral nonlinearity (INL) error is ±4LSB, with a guaranteed maximum over the operating temperature range.