1 Features

? 16-channel, AFE for ultrasound applications:

– Input attenuator, LNA, LPF, ADC, and

CW mixer

– Optimized signal chains for TGC and CW

modes

– Digital time gain compensation (DTGC)

– Total gain range: 6dB to 45dB

– Linear input range: 1VPP

? Input attenuator with DTGC:

– 8dB to 0dB attenuation with 0.125dB step

– Supports matched impedance for:

? 50Ω to 800Ω source impedance

? Low-noise amplifier (LNA) with DTGC:

– 14dB to 45dB gain with 0.125dB step

– Low input current noise: 1.2pA/√ Hz

? 3rd-order, linear-phase, low-pass filter (LPF):

– 10MHz, 15MHz, 20MHz, and 25MHz

? Analog-to-digital converter (ADC) with

programmable resolution:

– 14-bit ADC: 75dBFS idle channel SNR at

65 MSPS

– 12-bit ADC: 72dBFS idle channel SNR at

80 MSPS

? LVDS interface with a maximum speed up to

1GBPS

? Optimized for noise and power:

– 90mW/Ch at 1nV/√ Hz, 65 MSPS, TGC mode

– 55mW/Ch at 1.45nV/√ Hz, 40 MSPS,

TGC mode

– 59mW/Ch, CW mode

? Excellent device-to-device gain matching:

– ±0.5dB (typical)

? Low harmonic distortion: –60dBc level

? Fast and consistent overload recovery

? Continuous wave (CW) path with:

– Passive mixer

– Low close-in phase noise of –148dBc/Hz

at 1kHz frequency

– Phase resolution: λ / 16

– Supports 16X, 8X, 4X, and 1X CW clocks

– 12dB suppression of 3rd and 5th harmonics

? 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 AFE5816 is a highly-integrated, analog front-end

(AFE) solution specifically designed for ultrasound

systems where high performance, low power, and

small size are required.