LTC2140IUP-12#PBF

Analog To Digital Converters (ADC) Overview

The LTC2140IUP-12#PBF is a dual-channel, simultaneously sampling 12-bit analog-to-digital converter (ADC) from Analog Devices. Operating at a maximum sampling rate of 25Msps, it features a 750MHz full-power bandwidth sample-and-hold circuit and an internal voltage reference. The device delivers a typical signal-to-noise ratio (SNR) of 70.9dBFS and a spurious-free dynamic range (SFDR) of 89dBFS at 70MHz input frequency. It supports selectable input ranges from 1Vp-p to 2Vp-p and offers flexible digital output interfaces including full-rate CMOS, double data rate (DDR) CMOS, and DDR LVDS. Powered by a single 1.8V supply, the total power dissipation is typically 48mW.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel simultaneous sampling with 12-bit resolution and 25Msps throughput
• High AC performance: 70.9dB SNR and 89dB SFDR at 70MHz input
• Low power consumption: 48mW total (24mW per channel) at 25Msps
• Flexible digital outputs: Full-rate CMOS, DDR CMOS, or DDR LVDS modes

Analog To Digital Converters (ADC) Applications

• Communications systems
• Cellular base stations
• Software-defined radios
• Portable medical imaging
• Multi-channel data acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the temperature grade suffix 'I' indicates operation from -40°C to 85°C. Confirm the '#PBF' suffix denotes lead-free finish and tube packaging. Ensure the source document explicitly lists this part number as active or available for procurement before ordering.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2140IUP-12#PBF when a sampling rate of 25Msps is sufficient for the application, offering lower power consumption compared to the 40Msps (LTC2141) and 65Msps (LTC2142) variants in the same family. Choose DDR LVDS outputs if long-distance transmission is required, or CMOS modes for simpler interface designs.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC2140-12/LTC2141-12/LTC2142-12 series of low-power dual ADCs. The 'LTC2140' designation specifically identifies the 25Msps variant within this family, which shares architectural similarities but differs in speed and power characteristics from its higher-speed counterparts.

Analog To Digital Converters (ADC) Replacement Considerations

Direct functional replacements within the same package include the LTC2141IUP-12#PBF (40Msps) and LTC2142IUP-12#PBF (65Msps), provided the system clock can support the higher speeds. Lower speed alternatives may require verification of timing margins.