Analog Devices Inc. AD9271BSVZRL-50

Overview

AD9271BSVZRL-50 from Analog Devices is an octal-channel ultrasound analog front-end (AFE) IC integrating low-noise preamplifiers (LNA), variable gain amplifiers (VGA), 3rd-order antialiasing filters (AAF), 12-bit ADCs, and an 8×6 differential crosspoint switch. It delivers 12-bit resolution at 50 MSPS, 70 dB SNR, and 80 dB SFDR with 1.1 nV/√Hz input-referred LNA noise, optimized for medical ultrasound beamforming systems.

For engineers reviewing the AD9271BSVZRL-50 datasheet, AD9271BSVZRL-50 pinout, AD9271BSVZRL-50 application, or AD9271BSVZRL-50 equivalent, this page provides verified technical context, channel-level specifications, TQFP-100 pin mapping, real-world ultrasound and radar use cases, and validated alternative AFE options - all grounded in Rev. B datasheet data and Analog Devices' official characterization.

Technical Context

The AD9271BSVZRL-50 implements eight fully independent signal chains, each with a single-ended-to-differential LNA (14/15.6/18 dB gain), linear-in-dB VGA (−6 dB to +24 dB), programmable 3rd-order Butterworth AAF (8–18 MHz cutoff), and a 12-bit pipeline ADC. Its integrated 8×6 crosspoint switch enables continuous-wave (CW) Doppler mode by routing LNA outputs to transconductance amplifiers without engaging the VGA/AAF/ADC path.

Each channel supports dual-mode active input impedance matching (50 Ω / 100 Ω / 15 kΩ), overload recovery in <10 ns, and fast wake-up from standby (<2 μs). The LVDS serial interface outputs DCO± and FCO± clocks synchronized to DDR data streams, with pipeline latency of exactly 8 clock cycles and aperture jitter <1 ps rms.

Key Specifications

Pinout & Package

AD9271BSVZRL-50 is housed in a RoHS-compliant 100-lead TQFP (16 mm × 16 mm) with exposed thermal paddle. Pin 0 is the exposed ground paddle; Pin 1 is top-left corner indicator. All AVDD pins (3, 4, 9, 10, 15, 16, 21, 22, 25, 50, 54, 55, 60, 61, 66, 67, 72, 73, 92) require local 1.8 V decoupling; CWVDD (Pin 84) requires separate 3.3 V supply for CW Doppler bias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrasound analog front-end applications.

Compared with AD9271BSVZRL-50, AD9272BSVZ-40 offers identical analog performance at reduced speed and power, while AD9279BCPZ-50 trades higher resolution and SNR for greater noise and package size - making AD9271BSVZRL-50 the optimal balance for mainstream 12-bit, 50 MSPS ultrasound AFE requirements.

Availability

AD9271BSVZRL-50 is available at Aetrix Electronics and suitable for medical ultrasound imaging, automotive radar sensing, and portable point-of-care scanners requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD9271BSVZRL-50 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.

The AD9271 product line was developed specifically for ultrasound equipment manufacturers needing highly integrated, low-noise, multi-channel analog front-ends that reduce system size, power, and development time without compromising image quality.

FAQ

What is the maximum sample rate supported by the AD9271BSVZRL-50?

The AD9271BSVZRL-50 supports a maximum sample rate of 50 MSPS, as confirmed in Table 3 (Switching Specifications) of Rev. B datasheet. This rate applies to all eight channels simultaneously and enables Nyquist-limited capture of signals up to 25 MHz, making it suitable for high-frequency ultrasound transducers operating at 12–15 MHz center frequencies. The ADC maintains 70 dB SNR and 80 dB SFDR at this full rate.

Does the AD9271BSVZRL-50 include an integrated antialiasing filter, and what are its key characteristics?

Yes, the AD9271BSVZRL-50 integrates a 3rd-order Butterworth antialiasing filter (AAF) between the VGA and ADC stages. Per Table 1 (AC Specifications), its −3 dB cutoff is programmable from 8 MHz to 18 MHz via SPI, with ±15% bandwidth tolerance and ±2 ns group delay variation across 1–18 MHz. This filter is essential for suppressing out-of-band noise before digitization in ultrasound TGC applications.

How does the crosspoint switch in the AD9271BSVZRL-50 support continuous-wave Doppler operation?

The AD9271BSVZRL-50 includes an 8×6 differential crosspoint switch that routes LNA outputs directly to CW Doppler mixer inputs, bypassing the VGA, AAF, and ADC. As described on Page 1 and Figure 1, this enables simultaneous CW Doppler processing on up to six channels while maintaining full TGC operation on others. Each CWD0+/- to CWD5+/- pair delivers differential current-mode outputs with ±2 mA p-p swing and 1.5–3.6 V common-mode range.

What power supply voltages are required for normal operation of the AD9271BSVZRL-50?

The AD9271BSVZRL-50 requires three distinct supplies: AVDD = 1.8 V (analog core, pins 3,4,9,etc.), DRVDD = 1.8 V (LVDS output drivers, pins 26,47), and CWVDD = 3.3 V (CW Doppler output bias, pin 84). Table 6 (Power Supply) specifies absolute max ratings of −0.3 V to +2.0 V for AVDD/DRVDD and −0.3 V to +3.9 V for CWVDD. Total power dissipation is 1280–1494 mW in full-channel mode at 50 MSPS.

Is the AD9271BSVZRL-50 pin-compatible with other members of the AD927x family, such as the AD9271-40 or AD9271-25?

Yes, the AD9271BSVZRL-50 is pin-compatible with AD9271-40 and AD9271-25 variants, as confirmed by identical pin configuration diagrams (Figure 4) and shared functional block diagram across all speed grades in Rev. B datasheet. All share the same 100-lead TQFP package, identical pin functions (e.g., LI-A through LI-H, DOUTA+ through DOUTH+, CWD0+ through CWD5+), and compatible SPI interface - enabling drop-in replacement based on required sample rate.