Dual-channel, 14-bit, 2.6-Gsample/sec RF ADC converts signals to 4 GHz

Dual-channel, 14-bit, 2.6-Gsample/sec RF ADC converts signals to 4 GHz

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By Graham Prophet

ADC32RF44 is a 14-bit, 2.6-Gsample/sec, dual-channel, ADC that supports RF sampling with input frequencies up to 4 GHz and beyond (analogue input bandwidth is specified at 3.2 GHz). Designed for high signal-to-noise ratio (SNR), the ADC32RF44 delivers a noise spectral density of –154.2 dBFS/Hz as well as dynamic range and channel isolation over a large input frequency range. Its buffered analogue input with on-chip termination provides uniform input impedance across a wide frequency range and minimizes sample-and-hold glitch energy.

Each ADC channel can be connected to a dual-band, digital down-converter (DDC) with up to three independent, 16-bit numerically-controlled oscillators (NCOs) per DDC for phase-coherent frequency hopping. Additionally, the ADC is equipped with front-end peak and RMS power detectors and alarm functions to support external automatic gain control (AGC) algorithms.


Suggested application areas include; multi-band, multi-mode 2G, 3G, 4G cellular receivers; phased array radars; electronic warfare; cable infrastructure; broadband wireless; high-speed digitizers; software-defined radios; communications test equipment; and microwave and millimeter wave receivers.


The ADC32RF44 supports the JESD204B serial interface with subclass 1-based deterministic latency using data rates up to 12.5 Gbps with up to four lanes per ADC. The device is offered in a 72-pin VQFN package (10 × 10 mm), consumes a maximum of around 6W (depending on variant) and supports the industrial temperature range (–40°C to +85°C).






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