LTC1747IFW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1747IFW#PBF is an 80Msps, 12-bit pipelined analog-to-digital converter (ADC) designed for high-frequency signal digitization. It operates on a single 5V supply with a power dissipation of 1.4W. The device features selectable differential input ranges of –1V or –1.6V and delivers 72dB SNR and 85dB SFDR in the 3.2V range. Key specifications include a 240MHz sample-and-hold bandwidth, 0.15ps RMS jitter, and –1.5 LSB INL. The digital interface supports 5V, 3V, 2V, and LVDS logic systems via a separate OVDD supply.

Analog To Digital Converters (ADC) Feature Summary

• 80Msps sampling rate with 12-bit resolution and no missing codes
• Pin-compatible with the 14-bit LTC1748 within the same family
• Selectable input ranges: –1V (SENSE to GND) or –1.6V (SENSE to VDD)
• Ultralow aperture jitter of 0.15ps RMS for excellent undersampling performance

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates RoHS compliance. Confirm the 'I' grade temperature range (-40°C to 85°C) matches the application requirements. Check current availability status as high-speed ADCs may have limited stock or long lead times depending on the distributor.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC1747 when 80Msps throughput and 12-bit resolution are required. Choose this part over the LTC1748 if lower power consumption is preferred, as the 14-bit variant typically consumes more power. Ensure the input drive circuitry can support the 50Ω source impedance recommendation for optimal SFDR.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC174x family of high-speed ADCs. It shares pinouts with the LTC1748 (14-bit), LTC1746 (14-bit, 25Msps), LTC1745 (12-bit, 25Msps), LTC1744 (14-bit, 50Msps), LTC1743 (12-bit, 50Msps), LTC1742 (14-bit, 65Msps), and LTC1741 (12-bit, 65Msps).

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1748IFW#PBF is a pin-compatible 14-bit alternative offering higher resolution but potentially different power characteristics. For lower speed applications, the LTC1741CFW#PBF (65Msps, 12-bit) or LTC1745IFW#PBF (25Msps, 12-bit) serve as compatible options.