ADC3644IRSBT

Analog To Digital Converters (ADC) Overview

The ADC3644IRSBT is a dual-channel, 14-bit, high-speed analog-to-digital converter (ADC) from Texas Instruments. It supports sampling rates up to 125 MSPS with an ultra-low noise spectral density of –153 dBFS/Hz. The device operates on a single 1.8-V supply and consumes only 82 mW per channel at maximum speed. It features a latency of one clock cycle and offers both DDR and serial CMOS digital interfaces. The component includes an optional on-chip digital downconverter for decimation by factors of 2, 4, 8, 16, or 32. It is housed in a compact 40-pin WQFN package measuring 5 mm × 5 mm and supports an industrial temperature range from –40°C to +105°C.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel architecture providing independent signal processing paths within a single integrated circuit.
• Ultra-low power consumption optimized for energy efficiency across varying sampling rates.
• Integrated digital downconverter supporting programmable decimation ratios and complex NCO functionality.
• Flexible digital interface options including DDR and multiple serial CMOS configurations.

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems
• Industrial monitoring equipment
• Software defined radio infrastructure
• Radar and imaging applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'RSBT' against the manufacturer's official package option addendum to confirm the exact physical dimensions and pin configuration. Ensure that the required thermal performance metrics align with your system's heat dissipation capabilities, as the junction-to-ambient resistance is specified for standard board layouts. Cross-reference the datasheet revision history to ensure compatibility with current design specifications.

Analog To Digital Converters (ADC) Selection Notes

Select this component when low noise floor and minimal power consumption are critical constraints for high-speed signal digitization. The inclusion of an internal reference buffer simplifies external component requirements compared to designs requiring precise external voltage references. Consider the available decimation options if downstream processing bandwidth needs to be reduced without sacrificing resolution.

Analog To Digital Converters (ADC) Part Context

The ADC3644 belongs to a family of pin-compatible devices that vary primarily in sampling speed grades. While other members of the series operate at lower frequencies such as 10 MSPS or 65 MSPS, the ADC3644 specifically targets the 125 MSPS segment. This positioning allows designers to maintain consistent PCB layouts while scaling performance based on application bandwidth requirements.

Analog To Digital Converters (ADC) Replacement Considerations

Devices such as the ADC3641, ADC3642, and ADC3643 offer pin-to-pin compatibility but operate at lower sampling rates of 10, 25, and 65 MSPS respectively. These may serve as functional substitutes if the system does not require the full 125 MSPS throughput capability.

Analog To Digital Converters (ADC) FAQ

What is the typical noise spectral density of the ADC3644?

The device delivers a noise spectral density of –153 dBFS/Hz, contributing to its high dynamic range performance.

Does the ADC3644 support IF sampling?

Yes, the ADC3644 offers intermediate frequency (IF) sampling support, making it suitable for direct RF sampling applications.

How many channels does the ADC3644 contain?

The ADC3644 is a dual-channel device, providing two independent analog-to-digital conversion paths.