LTC1749CFW#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1749CFW#TRPBF is a high-speed, 12-bit analog-to-digital converter (ADC) from Analog Devices Inc., housed in a 48-lead TSSOP package. It operates at a sampling rate of 80Msps with a full power bandwidth of 500MHz. The device features an integrated programmable gain amplifier (PGA) and sample-and-hold circuit, supporting differential input ranges of 2.25Vp-p or 1.35Vp-p. Key performance metrics include a signal-to-noise ratio (SNR) of 71.8dB and spurious-free dynamic range (SFDR) of 87dB at 5MHz input. It requires a single 5V supply and dissipates approximately 1.45W.

Analog To Digital Converters (ADC) Feature Summary

• 80Msps sampling rate with 500MHz S/H bandwidth
• Integrated PGA for selectable input ranges (2.25Vp-p or 1.35Vp-p)
• High linearity: –1LSB INL, no missing codes, 0.15ps RMS jitter
• Flexible digital interface compatible with 5V, 3V, 2V, and LVDS logic

Analog To Digital Converters (ADC) Applications

• Direct IF Sampling
• Telecommunications Receivers
• Cellular Base Stations
• Spectrum Analysis
• Communications Test Equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'CFW#TRPBF' against official Analog Devices documentation to confirm the temperature grade (Commercial, 0°C to 70°C), package type (TSSOP-48), and tape-and-reel packaging configuration. Ensure compatibility with system voltage requirements and thermal management needs given the 1.45W power dissipation.

Analog To Digital Converters (ADC) Selection Notes

Select this component when digitizing wide dynamic range signals up to 500MHz is required. The internal PGA allows optimization of the input range without external amplifiers. Consider the 5-cycle data latency and the requirement for differential encoding inputs (ENC/ENC) when designing the digital interface timing.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1749 family of wide-bandwidth ADCs. It is pin-compatible with the 14-bit 80Msps LTC1750, allowing for design flexibility between resolution and speed requirements within the same footprint.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1749CFW#PBF is listed as a parameter-equivalent alternative in distributor databases. Verify if the non-trailing 'PBF' suffix denotes a tube package instead of tape-and-reel, which may impact assembly processes.

Analog To Digital Converters (ADC) FAQ

What is the maximum input frequency supported by the LTC1749?

The LTC1749 supports a full power bandwidth of 500MHz, allowing it to digitize wide dynamic range signals up to this frequency.

How does the PGA affect the input range?

The Programmable Gain Amplifier (PGA) allows selection between an effective front-end gain of 1 (2.25Vp-p input range) and 1 2/3 (1.35Vp-p input range).

Is the output format configurable?

Yes, the MSBINV pin controls the output format. A low state selects 2's complement format, while a high state selects offset binary format.