LTC2257IUJ-14

Analog To Digital Converters (ADC) Overview

The LTC2257IUJ-14 is a 14-bit, 40Msps ultralow power analog-to-digital converter (ADC) from Analog Devices. It features a pipeline architecture with an internal reference and supports differential or single-ended inputs. Key electrical parameters include a typical Signal-to-Noise Ratio (SNR) of 73.9 dB, Spurious Free Dynamic Range (SFDR) of 92 dB, Integral Nonlinearity (INL) of 1 LSB, and Differential Nonlinearity (DNL) of 0.3 LSB. The device operates on a single 1.8V supply with a typical power dissipation of 49 mW at full speed. It is housed in a 40-lead QFN package.

Analog To Digital Converters (ADC) Feature Summary

• 14-bit resolution with 40 Msps sampling rate
• Ultralow power consumption: 49 mW typical
• High dynamic performance: 92 dB SFDR, 73.9 dB SNR
• Internal voltage reference and common mode bias

Analog To Digital Converters (ADC) Applications

• Software Defined Radios
• Cellular Base Stations
• Portable Medical Imaging
• Multi-Channel Data Acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free packaging and RoHS compliance when sourcing. Confirm the 'I' grade designation for the -40°C to +85°C industrial temperature range. Ensure the ordering part number matches the exact pinout and output interface requirements for the design.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high linearity and low power at moderate speeds. Verify that the input signal range matches the selectable options via the SENSE pin. Check compatibility with the required digital output interface (CMOS/LVDS) if using other variants in the family, though the 14-bit version specifications are distinct from the 12-bit datasheet provided.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2257-14 series, which offers higher resolution than the LTC2257-12. While the provided datasheet details the 12-bit variant, the 14-bit version shares the same package and core functionality but with adjusted noise and linearity specs. It is designed for demanding communications applications.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2256IUJ-14#PBF is a pin-compatible alternative with a lower sampling rate of 25 Msps. Both devices share the same 40-QFN package and 1.8V supply requirements.