Analog Devices Inc. AD9279-65EBZ

Overview

AD9279-65EBZ from Analog Devices is an octal-channel ultrasound analog front-end (AFE) evaluation board integrating LNA, VGA, AAF, 12-bit ADC, and CW I/Q demodulator per channel. It supports TGC mode at 65 MSPS and CW Doppler mode with programmable phase rotation, delivering 70 dB SNR and >160 dBc/√Hz output dynamic range for medical imaging systems.

For engineers reviewing the AD9279-65EBZ datasheet, AD9279-65EBZ pinout, AD9279-65EBZ application, or AD9279-65EBZ equivalent, this board enables rapid validation of beamforming signal chains in portable ultrasound and automotive radar designs-particularly where low-power operation (<495 mW in CW mode), flexible gain control (45 dB range), and LVDS serial output alignment are critical selection criteria.

Technical Context

The AD9279-65EBZ implements a complete eight-channel receive path optimized for time-gain compensation (TGC) and continuous-wave (CW) Doppler processing. Each channel includes a low-noise preamplifier (0.75 nV/√Hz input noise), variable-gain amplifier with linear-in-dB control, second-order programmable antialiasing filter (8–18 MHz LPF), and 12-bit ADC operating up to 80 MSPS.

In CW mode, the board routes LNA outputs to independent I/Q demodulators with 16-phase programmability and 22.5° resolution. The integrated 4LO divider supports 1–10 MHz LO frequencies, while digital outputs use ANSI-644 LVDS or low-power reduced-signal LVDS with offset binary coding and pipeline latency of 8 clock cycles.

Key Specifications

Availability

AD9279-65EBZ is available at Aetrix Electronics and suitable for medical ultrasound development, automotive radar prototyping, and industrial NDT equipment requiring stable component supply, traceable sourcing, and long-term evaluation platform availability.

Supply support for AD9279-65EBZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, headquartered in Norwood, MA.

The AD9279 product line targets medical ultrasound and automotive radar AFE requirements, integrating LNA, VGA, AAF, ADC, and CW demodulation into a single CSP-BGA package to reduce system size and power consumption.

FAQ

What is the primary function of the AD9279-65EBZ evaluation board?

The AD9279-65EBZ is an evaluation platform for the AD9279 octal-channel ultrasound AFE IC. It provides full access to all analog and digital interfaces-including LI-x/LG-x inputs, DOUTx+/− LVDS outputs, 4LO+, and SPI control-to validate TGC and CW Doppler signal chain performance in medical imaging and radar applications. The board supports both 65 MSPS sampling (Mode II) and configurable CW demodulation.

Does the AD9279-65EBZ support both TGC and CW Doppler modes simultaneously?

No-the AD9279-65EBZ operates in either TGC mode (with full VGA, AAF, and ADC active) or CW Doppler mode (where VGA, AAF, and ADC are powered down and LNA outputs feed the I/Q demodulators). Mode selection is controlled via SPI register configuration; simultaneous operation is not supported by the underlying AD9279 IC architecture.

What power supplies are required to operate the AD9279-65EBZ?

The AD9279-65EBZ requires three regulated supplies: AVDD1 = 1.8 V (analog core), AVDD2 = 3.0 V (LNA/VGA/AAF), and DRVDD = 1.8 V (LVDS output drivers). These match the AD9279's absolute maximum ratings and ensure specified performance-especially critical for maintaining <0.75 nV/√Hz LNA input noise and 70 dB ADC SNR.

Can the AD9279-65EBZ be used for automotive radar development?

Yes-the AD9279-65EBZ supports CW Doppler mode with 1–10 MHz programmable LO frequency, 22.5° phase resolution, and >160 dBc/√Hz output dynamic range, making it suitable for short-range FMCW or CW radar receiver testing. Its eight-channel architecture also enables multi-beam angle-of-arrival analysis when paired with appropriate antenna arrays.

What is the purpose of the RBIAS pin on the AD9279-65EBZ?

The RBIAS pin on the AD9279-65EBZ connects to an external resistor that sets the internal ADC core bias current, directly influencing conversion linearity and noise performance. Per the AD9279 datasheet, a typical 10 kΩ resistor yields optimal trade-off between power and SNR; deviation affects full-scale accuracy and harmonic distortion metrics reported in Table 1.