LTC1741CFW

Analog To Digital Converters (ADC) Overview

The LTC1741CFW is a 12-bit, 65Msps pipelined analog-to-digital converter in a 48-lead TSSOP package. It operates on a single 5V supply with 1.275W power dissipation. Key electrical specifications include 72dB SNR and 85dB SFDR at a 3.2V input range, or 70.5dB SNR and 87dB SFDR at a 2V range. The device features an ultralow jitter of 0.15ps RMS, enabling undersampling of IF frequencies up to 70MHz. Input ranges are selectable via the SENSE pin for –1V or –1.6V differential inputs. Digital outputs support 5V, 3V, 2V, and LVDS logic levels.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution with No Missing Codes
• 65Msps Sampling Rate with 240MHz Full Power Bandwidth
• Pin-Selectable Input Ranges: –1V (SENSE=Ground) or –1.6V (SENSE=VDD)
• Ultralow Jitter: 0.15ps RMS

Analog To Digital Converters (ADC) Applications

• Telecommunications Receivers
• Cellular Base Stations
• Spectrum Analysis Systems
• Imaging Systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix FW confirms the 48-lead plastic TSSOP package. Confirm the C suffix indicates the commercial temperature range of 0°C to 70°C. Ensure the datasheet version matches the technical parameters provided. Check for specific lot traceability requirements if applicable to your manufacturing process.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC1741CFW when a 12-bit resolution at 65Msps is required. Choose this part over the LTC1742 if 14-bit resolution is not necessary, as it offers lower power consumption. Use the SENSE pin configuration to optimize dynamic performance for either narrow (–1V) or wide (–1.6V) input signals. Ensure the driving circuit can maintain source impedance below 100Ω per input for optimal SFDR.

Analog To Digital Converters (ADC) Part Context

The LTC1741 belongs to a pin-compatible family of high-speed ADCs from Analog Devices. It shares the same footprint and functionality as the LTC1742 (14-bit), LTC1743 (12-bit, 50Msps), and LTC1744 (14-bit, 50Msps). This compatibility allows designers to scale resolution or speed across designs without changing the PCB layout.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC1741 (standard grade) and LTC1741I (industrial grade, –40°C to 85°C). For different performance profiles, consider the LTC1743 (50Msps, 12-bit) or LTC1742 (65Msps, 14-bit). Verify that the replacement meets the specific temperature and voltage requirements.