AFE5803 (ACTIVE)

Fully Integrated, 8-Channel Ultrasound Analog Front End

Description

The AFE5803 is a highly integrated Analog Front-End (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE5803 integrates a complete time-gain-control (TGC) imaging path. It also enables users to select one of various power/noise combinations to optimize system performance. Therefore, the AFE5803 is a suitable ultrasound analog front end solution for portable systems.

The AFE5803 contains eight channels of voltage controlled amplifier (VCA), 14/12-bit Analog-to-Digital Converter (ADC). The VCA includes Low noise Amplifier (LNA), Voltage controlled Attenuator (VCAT), Programmable Gain Amplifier (PGA), and Low-Pass Filter (LPF). The LNA gain is programmable to support 250 mVPP to 1 VPP input signals. Programmable active termination is also supported by the LNA. The ultra-low noise VCAT provides an attenuation control range of 40 dB and improves overall low gain SNR which benefits harmonic imaging and near field imaging. The PGA provides gain options of 24 dB and 30 dB. Before the ADC, a LPF can be configured as 10 MHz, 15 MHz, 20 MHz or 30 MHz to support ultrasound applications with different frequencies. The high-performance 14bit/65 MSPS ADC in the AFE5803 achieves 77dBFS SNR. It ensures excellent SNR at low chain gain. The ADC’s LVDS outputs enable flexible system integration desired for miniaturized systems.

The AFE5803 is available in a 15mm × 9mm, 135-pin BGA package and it is specified for operation from 0°C to 85°C. It is also pin-to-pin compatible to the AFE5807, AFE5808 and AFE5808A.

Features

  • 8-Channel Complete Analog Front-End
    • LNA, VCAT, PGA, LPF, ADC
  • Programmable Gain Low-Noise Amplifier (LNA)
    • 24/18/12 dB Gain
    • 0.25/0.5/1 VPP Linear Input Range
    • 0.63/0.7/0.9 nV/rtHz Input Referred Noise
    • Programmable Active Termination
  • 40 dB Low Noise Voltage Controlled Attenuator (VCAT)
  • 24/30 dB Programmable Gain Amplifier (PGA)
  • 3rd Order Linear Phase Low-Pass Filter (LPF)
    • 10, 15, 20, 30 MHz
  • 14-bit Analog to Digital Converter (ADC)
    • 77 dBFS SNR at 65 MSPS
    • LVDS Outputs
  • Noise/Power Optimizations (Full Chain)
    • 158 mW/CH at 0.75 nV/rtHz, 65 MSPS
    • 101 mW/CH at 1.1 nV/rtHz, 40 MSPS
  • Excellent Device-to-Device Gain Matching
    • ±0.5 dB (Typical) and ±0.9 dB (Max)
  • Low Harmonic Distortion
  • Fast and Consistent Overload Recovery
  • Small Package: 15 mm x 9 mm, 135-BGA

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Parametrics Compare all products in Ultrasound

 
Function
Number of Channels (#)
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
Resolution (Bits)
Overload Recovery (clock cycle)
AFE5803 AFE5801 AFE5804 AFE5805 AFE5807 AFE5808A AFE5851
Ultrasound Analog Front End     Ultrasound Analog Front End     Ultrasound Analog Front End     Ultrasound Analog Front End     Ultrasound Analog Front End     Ultrasound Analog Front End     Ultrasound Analog Front End    
8     8     8     8     8     8     16    
0 to 85     -40 to 85     0 to 70     0 to 70     0 to 85     0 to 85     -40 to 85    
135NFBGA     64VQFN     135NFBGA     135NFBGA     135NFBGA     135NFBGA     64VQFN    
52.00 | 1ku     40.00 | 1ku     44.70 | 1ku     44.70 | 1ku     54.00 | 1ku     58.00 | 1ku     72.00 | 1ku    
12
14    
12     12     12     12
14    
12
14    
12    
1     1     1     1     1     1     1    

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