Analog Devices Inc. AD9271BSVZ-40

Overview

AD9271BSVZ-40 from Analog Devices is an octal-channel ultrasound analog front-end (AFE) IC integrating LNA, VGA, 3rd-order programmable antialiasing filter (AAF), 12-bit ADC, and 8×6 differential crosspoint switch. It delivers 12-bit resolution at 40 MSPS with 70 dB SNR and 80 dB SFDR, operating on 1.8 V AVDD/DRVDD and 3.3 V CWVDD supplies. Designed for medical ultrasound beamforming, it supports both TGC and CW Doppler modes with <10 ns overload recovery and <2 μs standby wake-up.

For engineers reviewing the AD9271BSVZ-40 datasheet, AD9271BSVZ-40 pinout, AD9271BSVZ-40 application, or AD9271BSVZ-40 equivalent, key selection criteria include per-channel 30 dB VGA gain range (−6 dB to +24 dB), input-referred noise of 1.4 nV/√Hz at max gain, 8–18 MHz programmable AAF cutoff, LVDS serial output compliance (ANSI-644), and 100-lead TQFP package with exposed paddle.

Technical Context

The AD9271BSVZ-40 implements a fully differential signal path per channel with active input impedance matching and SPI-programmable LNA gain (14/15.6/18 dB). Its VGA uses linear-in-dB control with 31.6 dB/V scale factor and 350 ns response time for 30 dB gain change.

The integrated 3rd-order Butterworth AAF is digitally programmable from 8 MHz to 18 MHz, while the 12-bit ADC features pipeline latency of 8 clock cycles, aperture jitter <1 ps rms, and dual LVDS outputs (DCO±, FCO±) supporting DDR timing alignment. The crosspoint switch enables flexible CW Doppler routing across eight LNA inputs to six differential outputs.

Key Specifications

Pinout & Package

AD9271BSVZ-40 is housed in a RoHS-compliant 100-lead TQFP (16 mm × 16 mm) with exposed thermal paddle (Pin 0, tied to quiet analog ground). The package supports industrial temperature range (−40°C to +85°C) and requires careful PCB layout for analog/digital supply separation and ground plane integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrasound AFE applications.

Compared with AD9272BSVZ-40 and AFE5809IRGCT, the AD9271BSVZ-40 uniquely balances 12-bit performance, integrated CW switching, and compact TQFP packaging-making it optimal for mid-tier portable ultrasound and automotive sensor platforms where pin compatibility and feature integration are prioritized over maximum resolution or raw speed.

Availability

AD9271BSVZ-40 is available at Aetrix Electronics and suitable for medical ultrasound systems, automotive parking sensors, and industrial non-destructive testing equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD9271BSVZ-40 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, serving precision instrumentation, communications, and healthcare markets.

The AD9271BSVZ-40 belongs to Analog Devices' ultrasound AFE product line, engineered specifically for compact, low-power, multichannel echo signal conditioning in portable and point-of-care medical imaging systems.

FAQ

What is the maximum sampling rate supported by the AD9271BSVZ-40?

The AD9271BSVZ-40 supports a maximum sampling rate of 40 MSPS, as indicated by the "-40" suffix in its part number. This is confirmed in the AC specifications table (Table 1) and switching specifications (Table 3), where the maximum clock rate is specified as 50 MSPS for the AD9271-50 variant-but the AD9271BSVZ-40 is rated for 40 MSPS operation with guaranteed SNR of 70 dB and SFDR of 80 dB at f_IN = 5 MHz. Operation beyond 40 MSPS is not characterized for this variant.

Does the AD9271BSVZ-40 include an integrated antialiasing filter, and can its cutoff frequency be adjusted?

Yes, the AD9271BSVZ-40 integrates a 3rd-order Butterworth antialiasing filter (AAF) between the VGA and ADC stages. Its low-pass cutoff frequency is programmable from 8 MHz to 18 MHz via the SPI interface, as documented in the General Description and Table 1 under "AAF Low-Pass Cutoff". This programmability allows system-level optimization for different transducer center frequencies without changing hardware.

How does the crosspoint switch in the AD9271BSVZ-40 support CW Doppler operation?

The AD9271BSVZ-40 includes an 8×6 differential crosspoint switch that routes any of the eight LNA outputs to one of six differential CW Doppler output pairs (CWD0± through CWD5±). As described in the General Description and Figure 1, this switch is SPI-programmable and enables flexible beamforming configurations for continuous-wave Doppler without external analog switches-reducing component count and signal path degradation in portable ultrasound probes.

What power supply voltages are required for the AD9271BSVZ-40 in TGC versus CW Doppler mode?

The AD9271BSVZ-40 requires three supplies: 1.8 V for AVDD (analog core) and DRVDD (LVDS drivers), and 3.3 V for CWVDD (CW Doppler output bias). In full TGC mode, all supplies are active. In CW Doppler mode, the VGA, AAF, and ADC are powered down, but CWVDD remains active to bias the transconductance amplifier and crosspoint switch outputs-ensuring 90 mW/channel total dissipation as specified in Table 1.

Is the AD9271BSVZ-40 pin-compatible with other members of the AD927x family, such as the AD9271BSVZ-50?

No, the AD9271BSVZ-40 is not pin-compatible with the AD9271BSVZ-50 or AD9271BSVZ-25. While all share the same 100-lead TQFP package and pin configuration (per Figure 4 and Table 6), the "-40", "-50", and "-25" suffixes denote speed-grade variants with identical pinouts but different AC performance characterizations and internal calibration. They are footprint-compatible but require validation of timing margins and SNR/SFDR at the target sample rate.