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Product details

Parameters

Number of input channels 16 Interface LVDS Active supply current (Typ) (mA) 274 Supply voltage (Max) (V) 3.6 Operating temperature range (C) -40 to 85 Features Analog Front End (AFE) Approx. price (US$) 114.44 | 1ku open-in-new Find other Ultrasound AFEs

Package | Pins | Size

NFBGA (ZBV) 289 225 mm² 15 x 15 open-in-new Find other Ultrasound AFEs

Features

  • 16-Channel, Complete Analog Front-End:
    • LNA, VCAT, PGA, LPF, ADC, and CW Mixer
  • LNA with Programmable Gain:
    • Gain: 24 dB, 18 dB, and 12 dB
    • Linear Input Range:
      0.25 VPP, 0.5 VPP, and 1 VPP
    • Input-Referred Noise:
      0.63 nV/√Hz, 0.7 nV/√Hz, and 0.9 nV/√Hz
    • Programmable Active Termination
  • Voltage-Controlled Attenuator (VCAT): 40 dB
  • Programmable Gain Amplifier (PGA):
    24 dB and 30 dB
  • Total Signal Chain Gain: 54 dB (max)
  • 3rd-Order, Linear-Phase LPF:
    • 10 MHz, 15 MHz, 20 MHz, 30 MHz, 35 MHz, and 50 MHz
  • Analog-to-Digital Converter (ADC):
    • 14-Bit ADC: 75-dBFS SNR at 65 MSPS
    • 12-Bit ADC: 72-dBFS SNR at 80 MSPS
  • LVDS Interface Maximum Speed of 1 Gbps
  • Noise and Power Optimizations (Full-Channel):
    • 140 mW/Ch at 0.75 nV/√Hz, 65 MSPS
    • 91.5 mW/Ch at 1.1 nV/√Hz, 40 MSPS
    • 80 mW/Ch at CW Mode
  • Excellent Device-to-Device Gain Matching:
    • ±0.5 dB (typical) and ±1.1 dB (max)
  • Low Harmonic Distortion
  • Fast and Consistent Overload Recovery
  • Passive Mixer for CWD:
    • Low Close-In Phase Noise:
      –156 dBc/Hz at 1 kHz Off 2.5-MHz Carrier
    • Phase Resolution: λ / 16
    • Supports 16X, 8X, 4X, and 1X CW Clocks
    • 12-dB Suppression on 3rd and 5th Harmonics
    • CWD High-Pass Filter Rejects Undesired Low-Frequency Signals < 1 kHz
  • Small Package: 15-mm × 15-mm NFBGA-289
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Description

The AFE5818 is a highly-integrated, analog front-end (AFE) solution specifically designed for ultrasound systems where high performance and small size are required. The device integrates a complete time-gain-control (TGC) imaging path and a continuous wave Doppler (CWD) path. The device also allows various power and noise combinations to be selected to optimize system performance. Therefore, the AFE5818 is a suitable ultrasound AFE solution for high-end and portable systems

The AFE5818 has a total of 16 channels, with each channel consisting of a voltage-controlled amplifier (VCA), a simultaneous sampling 14-bit and 12-bit analog-to-digital converter (ADC), and a continuous wave (CW) mixer. The VCA includes a low-noise amplifier (LNA), a voltage-controlled attenuator (VCAT), a programmable gain amplifier (PGA), and a low-pass filter (LPF). LNA gain is programmable and supports 250-mVPP to 1-VPP input signals and programmable active termination. The ultra-low noise VCAT provides an attenuation control range of 40 dB and improves overall low-gain SNR, which benefits harmonic and near-field imaging. The PGA provides gain options of 24 dB and 30 dB. In front of the ADC, an LPF can be configured at 10 MHz, 15 MHz, 20 MHz, 30 MHz, 35 MHz, or 50 MHz to support ultrasound applications with different frequencies.

The AFE5818 also integrates a low-power passive mixer and a low-noise summing amplifier to create an on-chip CWD beamformer. 16 selectable phase delays can be applied to each analog input signal. Furthermore, a unique third- and fifth-order harmonic suppression filter is implemented to enhance CW sensitivity

The high-performance, 14-bit ADC achieves 75-dBFS SNR. This ADC ensures excellent SNR at low-chain gain. The device can operate at maximum speeds of 65 MSPS and 80 MSPS, providing a 14-bit and a 12-bit output, respectively.

The ADC low-voltage differential signaling (LVDS) outputs enable a flexible system integration that is desirable for miniaturized systems.

The AFE5818 also allows various power and noise combinations to be selected to optimize system performance. Therefore, the AFE5818 is a suitable ultrasound AFE solution for both high-end and portable systems.

The AFE5818 is available in a 15-mm × 15-mm NFBGA-289 package (ZBV package, S-PBGA-N289) and are specified for operation from –40°C to 85°C. The devices are also pin-to-pin compatible with the AFE5816 device family.

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Technical documentation

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Type Title Date
* Datasheet AFE5818 16-Channel, Ultrasound, Analog Front-End with 140-mW/Channel Power, 0.75-nV/√Hz Noise, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC, and Passive CW Mixer datasheet (Rev. B) Aug. 25, 2015
Technical articles Take your ultrasound design to the next level Feb. 08, 2018
Application notes Understanding CW Mode for Ultrasound AFE Devices Jul. 17, 2017
Application notes Introduction to Ultrasound Jul. 10, 2017
User guides AFE5818EVM User Guide (Rev. A) Feb. 17, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$599.00
Description

The AFE5818EVM is a highly integrated Analog Front-End (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE5818EVM integrates a complete time-gain-control (TGC) imaging path and a continuous wave Doppler (CWD) path. It also (...)

Features
  • 16-Channel Complete Analog Front-End
  • Programmable Gain Low-Noise Amplifier (LNA)
  • 40 dB Low Noise Voltage Controlled Attenuator
  • 14-bit Analog to Digital Converter
  • Requires the TSW1400EVM and HSDCPro software for data capture and performance evaluation
EVALUATION BOARDS Download
document-generic User guide
Description

The AFE58JD18EVM is a highly integrated Analog Front-End (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE58JD18EVM integrates a complete time-gain-control (TGC) imaging path and a continuous wave Doppler (CWD) path. It also (...)

Features
  • 16-Channel Complete Analog Front-End
  • Programmable Gain Low-Noise Amplifier (LNA)
  • 40 dB Low Noise Voltage Controlled Attenuator
  • 14-bit Analog to Digital Converter
  • LVDS or JESD204B Data Formats

 

Design tools & simulation

SIMULATION MODELS Download
SLAM242.ZIP (58 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
NFBGA (ZBV) 289 View options

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