ADC34RF55IRTD

Analog To Digital Converters (ADC) Overview

The ADC34RF55IRTD is a quad-channel, 14-bit analog-to-digital converter (ADC) from Texas Instruments featuring a single-core non-interleaved architecture. It supports sampling rates up to 3 GSPS and direct RF sampling with input frequencies reaching 3 GHz. The device integrates dual-band digital down-converters (DDCs) per channel, utilizing a 48-bit numerically controlled oscillator (NCO) for phase-coherent frequency hopping in under 1 µs. It employs a JESD204B serial interface supporting lane rates up to 13 Gbps with subclass 1 deterministic latency. Key performance metrics include a noise spectral density of -156 dBFS/Hz without averaging and -158 dBFS/Hz with 2x averaging. Power consumption is rated at 1.2 W per channel, operating on 1.8 V and 1.2 V supplies within a -40°C to 85°C temperature range.

Analog To Digital Converters (ADC) Feature Summary

• Single-core non-interleaved architecture maximizes signal-to-noise ratio and minimizes aperture jitter.
• Integrated dual-band DDCs with 48-bit NCO enable fast, phase-coherent frequency hopping via GPIO control.
• JESD204B interface supports high-speed data transfer up to 13 Gbps with deterministic latency.
• On-chip signal averaging improves noise spectral density performance.

Analog To Digital Converters (ADC) Applications

• Phased array radar
• Software defined radio (SDR)
• Spectrum analyzer
• High-speed digitizer
• Electronic warfare

Analog To Digital Converters (ADC) Procurement Notes

Verify the RTD suffix indicates the 64-pin QFN package configuration. Confirm that the ordering part number matches the specific revision required for your design. Ensure power supply decoupling meets the recommended layout guidelines to maintain signal integrity. Check for any recent documentation updates regarding register programming or initialization sequences before integration.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high dynamic range and low phase noise are critical for wideband RF applications. The single-core architecture eliminates interleaving spurs found in other architectures. Consider the integrated DDC capabilities if baseband processing resources need reduction. Verify that the 1.2 W/ch power dissipation fits within the thermal constraints of the target PCB layout.

Analog To Digital Converters (ADC) Part Context

This device belongs to the ADC34RF5x family, which includes variants with different maximum sampling rates such as the ADC34RF52. All members share the same 64-pin QFN package and core architectural features but differ in speed specifications. The ADC34RF55 represents the highest speed option in this specific series, designed for demanding 3 GSPS applications.

Analog To Digital Converters (ADC) Replacement Considerations

The ADC34RF52 is a compatible alternative offering 1.5 GSPS operation with identical packaging and pinout. No other direct substitutes are documented in the official datasheet.

Analog To Digital Converters (ADC) FAQ

How does the device achieve improved noise spectral density?

The ADC34RF55 utilizes additional internal ADCs combined with on-chip signal averaging to improve the noise density from -156 dBFS/Hz to -158 dBFS/Hz.

What is the mechanism for fast frequency hopping?

Frequency hopping is achieved using GPIO pins for NCO frequency control, allowing phase-coherent hopping in less than 1 µs.

Does the device support deterministic latency?

Yes, the JESD204B serial data interface supports subclass 1 deterministic latency.