The AFE5828 device is a highly-integrated, analog front-end (AFE) solutions specifically designed for ultrasound systems where high performance, low power, and small size are required.
The AFE5828 is an integrated AFE optimized for medical ultrasound application. The device is realized through a multichip module (MCM) with two dies: one voltage-controlled amplifier (VCA) die and one analog-to-digital converter (ADC) die. The VCA die has 16 channels that interface with the 16 channels of the ADC die.
Each channel in the VCA die can be configured in one of two modes: time gain compensation (TGC) mode or continuous wave (CW) mode. In TGC mode, each channel includes a low-noise amplifier (LNA), a voltage-controlled attenuator (VCAT), a programmable gain amplifier (PGA), and a third-order, low-pass filter (LPF). The LNA is programmable in gains of 21 dB, 18 dB, or 15 dB. The LNA also supports active termination. The VCAT supports an attenuation range of 0 dB to 36 dB, with analog voltage control for the attenuation. The PGA provides gain options from 18 dB to 27 dB in steps of 3 dB. The LPF cutoff frequency can be set between 10 MHz and 30 MHz to support ultrasound applications with different frequencies. In CW mode, the output of the LNA goes to a low-power passive mixer with 16 selectable phase delays followed by a summing amplifier with a band-pass filter. Different phase delays can be applied to each analog input signal to perform an on-chip beamforming operation. A harmonic filter in the CW mixer suppresses the third and fifth harmonic to enhance the sensitivity of the CW Doppler measurement.
The 16 channels of the ADC die can be configured to operate with a resolution of 14 bits or 12 bits. The ADC resolution can be traded off with conversion rate, and can operate at maximum speeds of 65 MSPS and 80 MSPS at 14-bit and 12-bit resolution, respectively. The ADC is designed to scale its power with sampling rate. The output interface of the ADC comes out through a low-voltage differential signaling (LVDS) that can easily interface with low-cost field-programmable gate arrays (FPGAs).
The device also allows various power and noise combinations to be selected for optimizing system performance. Therefore, these devices are suitable ultrasound AFE solutions for systems with strict battery-life requirements.
The device is available in a 15-mm × 15-mm NFBGA-289 package and is pin-compatible with the AFE5818 and AFE5816 family.
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| Documentación principal | Tipo | Título | Opciones de formato | Fecha |
|---|---|---|---|---|
| * | Data sheet | AFE5828 16-Channel Ultrasound AFE with 102-mW/Channel Power, 0.8-nV/√Hz Noise, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC, LVDS Interface, and Passive CW Mixer datasheet (Rev. A) | PDF | HTML | 27 oct 2017 |
| Application brief | Building High-Performance NDT Systems with Ultrasound Transmitters and Receivers | PDF | HTML | 04 ago 2023 | |
| Application note | Understanding CW Mode for Ultrasound AFE Devices | 17 jul 2017 | ||
| Application note | Introduction to Ultrasound | 10 jul 2017 |
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El AFE5828 consiste en una solución de circuito frontal analógico (AFE) altamente integrada que se diseñó en concreto para sistemas de ultrasonido en los que se necesitan alto rendimiento y tamaño reducido. El dispositivo integra una ruta completa de adquisición de imágenes de control de ganancia (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| NFBGA (ZAV) | 289 | Ultra Librarian |
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