LTC2257IUJ-12

Analog To Digital Converters (ADC) Overview

The LTC2257IUJ-12 is a 12-bit, 40Msps sampling analog-to-digital converter (ADC) from Analog Devices. It operates on a single 1.8V supply and dissipates 47mW at full speed. Key AC performance metrics include a Signal-to-Noise Ratio (SNR) of 71.1dB and a Spurious Free Dynamic Range (SFDR) of 88dB. The device features an 800MHz full-power bandwidth sample-and-hold circuit and ultra-low jitter of 0.17ps RMS. DC specifications guarantee ±0.3LSB typical Integral Nonlinearity (INL) and ±0.1LSB Differential Nonlinearity (DNL). It supports selectable input ranges from 1VP-P to 2VP-P via the SENSE pin.

Analog To Digital Converters (ADC) Feature Summary

• 40Msps sampling rate with 71.1dB SNR and 88dB SFDR
• Ultra-low power consumption of 47mW at 1.8V
• Selectable analog input ranges: 1VP-P to 2VP-P
• Optional clock duty cycle stabilizer and data output randomizer

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix for temperature grade; 'I' denotes -40°C to 85°C operation. Confirm package type is 40-lead QFN (6mm x 6mm). Check datasheet for lead-free finish availability and RoHS compliance status before ordering.

Analog To Digital Converters (ADC) Selection Notes

Select this model over the LTC2258-12 if a lower 40Msps sampling rate is sufficient, as it offers reduced power dissipation (47mW vs 79mW). Choose the LTC2256-12 variant only if further power reduction to 34mW at 25Msps is required. Ensure the application can accommodate the 1.8V analog supply voltage.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC225x-12 family of ultralow power ADCs. It shares pin compatibility with the 14-bit versions (LTC225x-14) and other speeds in the series (LTC2256/58), facilitating design upgrades or downgrades within the same footprint.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives within the same family include the LTC2258IUJ-12 (65Msps) and LTC2256IUJ-12 (25Msps). Verify that the replacement's sampling rate and power profile meet the system requirements.