LTC2257CUJ-12#PBF

Analog To Digital Converters (ADC) Overview

The LTC2257CUJ-12#PBF is a 12-bit, 40Msps sampling analog-to-digital converter (ADC) from Analog Devices. It operates on a single 1.8V supply with ultralow power consumption of 47mW at full speed. The device features an 800MHz full-power bandwidth sample-and-hold circuit and supports selectable input ranges from 1VP-P to 2VP-P. Digital outputs are available in full-rate CMOS, double data rate CMOS, or double data rate LVDS formats. Key performance metrics include a typical Signal-to-Noise Ratio (SNR) of 71.1dB and a Spurious Free Dynamic Range (SFDR) of 88dB.

Analog To Digital Converters (ADC) Feature Summary

• Ultralow power consumption of 47mW at 40Msps with a single 1.8V supply
• High AC performance: 71.1dB SNR and 88dB SFDR
• Selectable analog input ranges: 1VP-P to 2VP-P via SENSE pin
• Flexible digital output interfaces: Full-rate CMOS, DDR CMOS, or DDR LVDS

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 temperature grade suffix 'C' indicates operation from 0°C to 70°C. Confirm the '#PBF' suffix denotes lead-free finish and tube packaging. Ensure the specific part number matches the required 40Msps sampling rate variant within the LTC2257-12 family.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring low power and high dynamic range at moderate sampling speeds. Compare against LTC2258-12 (65Msps) or LTC2256-12 (25Msps) based on bandwidth needs. Verify compatibility with CMOS or LVDS digital interface requirements and ensure the 40-pin QFN package fits the PCB layout constraints.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2258-12/LTC2257-12/LTC2256-12 family of 12-bit ADCs. These devices share identical pinouts and functional blocks but differ in maximum sampling rates (65/40/25Msps) and corresponding power dissipation levels. They are designed for digitizing high-frequency signals with minimal jitter.

Analog To Digital Converters (ADC) Replacement Considerations

LTC2258IUJ-12#PBF offers higher speed (65Msps) with similar power characteristics. LTC2256IUJ-12#PBF provides lower power consumption at 25Msps. Both are pin-compatible replacements if sampling rate adjustments are acceptable.