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AFE5808A Datasheet(PDF) 1 Page - Texas Instruments |
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AFE5808A Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 66 page  AFE5808A www.ti.com SLOS729B – OCTOBER 2011 – REVISED APRIL 2012 Fully Integrated, 8-Channel Ultrasound Analog Front End with Passive CW Mixer, 0.75 nV/rtHz, 14/12-Bit, 65 MSPS, 158 mW/CH Check for Samples: AFE5808A 1 FEATURES APPLICATIONS • 8-Channel Complete Analog Front-End • Medical Ultrasound Imaging – LNA, VCAT, PGA, LPF, ADC, and CW Mixer • Nondestructive Evaluation Equipments • Programmable Gain Low-Noise Amplifier DESCRIPTION (LNA) The AFE5808A is a highly integrated Analog Front- – 24/18/12 dB Gain End (AFE) solution specifically designed for – 0.25/0.5/1 VPP Linear Input Range ultrasound systems in which high performance and – 0.63/0.7/0.9 nV/rtHz Input Referred Noise small size are required. The AFE5808A integrates a complete time-gain-control (TGC) imaging path and a – Programmable Active Termination continuous wave Doppler (CWD) path. It also enables • 40 dB Low Noise Voltage Controlled users to select one of various power/noise Attenuator (VCAT) combinations to optimize system performance. • 24/30 dB Programmable Gain Amplifier (PGA) Therefore, the AFE5808A is a suitable ultrasound analog front end solution not only for high-end • 3rd Order Linear Phase Low-Pass Filter (LPF) systems, but also for portable ones. – 10, 15, 20, 30 MHz The AFE5808A contains eight channels of voltage • 14-bit Analog to Digital Converter (ADC) controlled amplifier (VCA), 14/12-bit Analog-to-Digital – 77 dBFS SNR at 65 MSPS Converter (ADC), and CW mixer. The VCA includes – LVDS Outputs Low noise Amplifier (LNA), Voltage controlled Attenuator (VCAT), Programmable Gain Amplifier • Noise/Power Optimizations (Full Chain) (PGA), and Low-Pass Filter (LPF). The LNA gain is – 158 mW/CH at 0.75 nV/rtHz, 65 MSPS programmable to support 250 mVPP to 1 VPP input – 101 mW/CH at 1.1 nV/rtHz, 40 MSPS signals. Programmable active termination is also supported by the LNA. The ultra-low noise VCAT – 80 mW/CH at CW Mode provides an attenuation control range of 40 dB and • Excellent Device-to-Device Gain Matching improves overall low gain SNR which benefits – ±0.5 dB (Typical) and ±0.9 dB (Max) harmonic imaging and near field imaging. The PGA provides gain options of 24 dB and 30 dB. Before the • Low Harmonic Distortion ADC, a LPF can be configured as 10 MHz, 15 MHz, • Fast and Consistent Overload Recovery 20 MHz or 30 MHz to support ultrasound applications • Passive Mixer for Continuous Wave with different frequencies. The high-performance Doppler(CWD) 14bit/65 MSPS ADC in the AFE5808A achieves 77dBFS SNR. It ensures excellent SNR at low chain – Low Close-in Phase Noise –156 dBc/Hz at 1 gain. The ADC’s LVDS outputs enable flexible system KHz off 2.5 MHz Carrier integration desired for miniaturized systems. – Phase Resolution of 1/16 λ – Support 16X, 8X, 4X and 1X CW Clocks – 12dB Suppression on 3rd and 5th Harmonics – Flexible Input Clocks • Small Package: 15 mm x 9 mm, 135-BGA NOTE AFE5808A is an enhanced version of AFE5808 and it is recommended for new designs. Compared to AFE5808, it expands the cut-off frequency range of the digital high pass filter; increases the handling capability of extreme overload signals; lowers the correlated noise significantly when high impedance source appears. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2011–2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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