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