LTC2220IUP

Analog To Digital Converters (ADC) Overview

The LTC2220IUP is a 12-bit, 170Msps analog-to-digital converter housed in a 64-lead 9mm × 9mm QFN package. It operates on a single 3.3V supply with typical power dissipation of 890mW in CMOS mode and 1182mW in LVDS mode. The device features an internal reference, selectable input ranges of –0.5V or –1V, and supports differential or single-ended encode inputs. Key performance metrics include 67.5dB SNR and 80dB SFDR at full speed. It offers flexible digital outputs via LVDS or demultiplexed CMOS buses, along with shutdown and nap modes for power management.

Analog To Digital Converters (ADC) Feature Summary

• 170Msps sampling rate with 12-bit resolution and no missing codes
• 67.5dB SNR and 80dB SFDR up to 170MHz input frequency
• Flexible output formats: LVDS, full-rate CMOS, or demultiplexed CMOS
• Selectable analog input ranges: –0.5V or –1V via SENSE pin

Analog To Digital Converters (ADC) Applications

• Wireless and wired broadband communication systems
• Cable head-end systems
• Power amplifier linearization
• Communications test equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix (e.g., #PBF for lead-free) against the required RoHS compliance and temperature grade (C for commercial, I for industrial). Confirm package availability as the standard listing is tube-packaged; add #TR for tape and reel options if automated assembly is required.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2220IUP for applications requiring 170Msps throughput. Choose the LTC2221 variant if a lower 135Msps sample rate is sufficient, as it offers reduced power consumption. Ensure the system clock duty cycle requirements align with the MODE pin configuration for the optional duty cycle stabilizer.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC2220/LTC2221 family of high-speed ADCs. It is pin-compatible with the LTC2230 (10-bit) and the faster LTC2220-1 (185Msps), allowing for design flexibility within the same package footprint while adjusting for resolution or speed requirements.

Analog To Digital Converters (ADC) Replacement Considerations

LTC2221IUP (135Msps version)

Analog To Digital Converters (ADC) FAQ

How is the analog input range selected?

The input range is configured by connecting the SENSE pin to VCM for a –0.5V range or to VDD for a –1V range.

What output interface options are available?

The device supports LVDS outputs, full-rate CMOS outputs, or two demultiplexed CMOS buses running at half the data rate.

Does the part support undersampling?

Yes, the ultralow jitter of 0.15ps RMS allows for undersampling of IF frequencies with excellent noise performance.