1 Features
• 16-channel, complete analog front-end:
– LNA, VCAT, PGA, LPF, ADC, and CW mixer
• LNA with programmable gain:
– Gain: 24dB, 18dB, and 12dB
– Linear input range:
0.25VPP, 0.5VPP, and 1VPP
– Input-referred noise:
0.63nV/√Hz, 0.7nV/√Hz, and 0.9nV/√Hz
– Programmable active termination
• Voltage-controlled attenuator (VCAT): 40dB
• Programmable gain amplifier (PGA):
24dB and 30dB
• Total signal chain gain: 54dB (maximum)
• 3rd-order, linear-phase LPF:
– 10MHz, 15MHz, 20MHz, 30MHz, 35MHz, and
50MHz
• Analog-to-digital converter (ADC):
– 14-bit ADC: 75dBFS SNR at 65 MSPS
– 12-bit ADC: 72dBFS SNR at 80 MSPS
• LVDS interface maximum speed of 1Gbps
• Noise and power optimizations (full-channel):
– 140mW/Ch at 0.75nV/√Hz, 65 MSPS
– 91.5mW/Ch at 1.1nV/√Hz, 40 MSPS
– 80mW/Ch at CW mode
• Excellent device-to-device gain matching:
– ±0.5dB (typical) and ±1.1dB (maximum)
• Low harmonic distortion
• Fast and consistent overload recovery
• Passive mixer for CWD:
– Low close-in phase noise:
–156dBc/Hz at 1kHz off 2.5MHz carrier
– Phase resolution: λ / 16
– Supports 16X, 8X, 4X, and 1X CW clocks
– 12dB suppression on 3rd and 5th harmonics
– CWD high-pass filter rejects undesired lowfrequency
signals < 1kHz
• Small package: 15mm × 15mm NFBGA-289

2 Applications
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipment
• Sonar Imaging Equipment
• Multichannel, High-Speed Data Acquisition

3 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 timegain-
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