LTC1743CFW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1743CFW#PBF is a 12-bit, 50Msps pipelined analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates on a single 5V supply and dissipates approximately 1000mW of power. The device features selectable differential input ranges of ±1V or ±1.6V, determined by the SENSE pin configuration. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 72.5dB at 5MHz with a 3.2V range and 71dB with a 2V range. Spurious Free Dynamic Range (SFDR) reaches 85dB in the 3.2V range and 90dB in the 2V range. The component utilizes a 48-pin TSSOP package and supports digital logic interfaces compatible with 5V, 3V, and 2V systems.

Analog To Digital Converters (ADC) Feature Summary

• 50Msps sampling rate with 12-bit resolution and pipeline architecture
• Selectable input voltage ranges: ±1V (SENSE grounded) or ±1.6V (SENSE to VDD)
• High dynamic performance: 72.5dB SNR and 85dB SFDR (3.2V range); 71dB SNR and 90dB SFDR (2V range)
• Low aperture jitter of 0.3ps RMS for effective undersampling of IF frequencies

Analog To Digital Converters (ADC) Applications

• Telecommunications systems
• Cellular base stations
• Spectrum analysis equipment
• Imaging systems
• RF receivers

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'CFW' indicates the commercial temperature grade (0°C to 70°C). Confirm that the '#PBF' designation ensures RoHS compliance and lead-free termination. Check current availability status as high-speed ADCs may have limited stock or long lead times depending on the distributor. Ensure the ordering part number matches the exact package and temperature variant required for the design.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC1743CFW#PBF when a 50Msps sampling rate and 12-bit resolution are required. Choose this model over the LTC1744 if 12-bit resolution suffices, as it offers lower power consumption compared to the 14-bit variant. Ensure the application can accommodate the 1000mW power dissipation in the 48-TSSOP package. Verify that the input signal source impedance is matched and low enough (≤100Ω) to maintain specified SFDR performance.

Analog To Digital Converters (ADC) Part Context

The LTC1743 belongs to a pin-compatible family of high-speed ADCs from Analog Devices. It shares the same 48-pin TSSOP footprint and pinout with the LTC1744 (14-bit, 50Msps), LTC1742 (14-bit, 65Msps), and LTC1741 (12-bit, 65Msps). This compatibility allows for design flexibility and potential migration between different resolution and speed requirements without changing the PCB layout.

Analog To Digital Converters (ADC) Replacement Considerations

For direct pin-compatible replacements within the same family, consider the LTC1744IFW#PBF (14-bit, 50Msps) if higher resolution is needed. For higher speed requirements, the LTC1741CFW#PBF (12-bit, 65Msps) or LTC1742IFW#PBF (14-bit, 65Msps) are compatible alternatives. Note that these substitutes operate at different speeds and resolutions.