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AFE5808 www.

ti.com SLOS688C CSEPTEMBER 2010CREVISED APRIL

2012 Fully Integrated, 8-Channel Ultrasound Analog Front End with Passive CW Mixer, 0.75nV/rtHz, 14/12-Bit, 65MSPS, 153mW/CH Check for Samples: AFE5808 1FEATURES APPLICATIONS ? 8-Channel Complete Analog Front-End ? Medical Ultrasound Imaging C LNA, VCAT, PGA, LPF, ADC, and CW Mixer ? Nondestructive Evaluation Equipments DESCRIPTION ? Programmable Gain Low-Noise Amplifier The AFE5808 is a highly integrated Analog Front-End (LNA) (AFE) solution specifically designed for ultrasound C 24/18/12 dB Gain systems in which high performance and small size C 0.25/0.5/1 VPP Linear Input Range are required. The AFE5808 integrates a complete time-gain-control (TGC) imaging path and a C 0.63/0.7/0.9 nV/rtHz Input Referred Noise continuous wave Doppler (CWD) path. It also enables C Programmable Active Termination users to select one of various power/noise ?

40 dB Low Noise Voltage Controlled combinations to optimize system performance. Attenuator (VCAT) Therefore, the AFE5808 is a suitable ultrasound analog front end solution not only for high-end ? 24/30 dB Programmable Gain Amplifier (PGA) systems, but also for portable ones. ? 3rd Order Linear Phase Low-Pass Filter (LPF) The AFE5808 contains eight channels of voltage C 10, 15, 20,

30 MHz controlled amplifier (VCA), 14/12-bit Analog-to-Digital ? 14-bit Analog to Digital Converter (ADC) Converter (ADC), and CW mixer. The VCA includes C

77 dBFS SNR at

65 MSPS Low noise Amplifier(LNA), Voltage controlled Attenuator(VCAT), Programmable Gain C LVDS Outputs Amplifier(PGA), and Low-Pass Filter (LPF). The LNA ? Noise/Power Optimizations (Full Chain) gain is programmable to support

250 mVPP to

1 VPP C

153 mW/CH at 0.75 nV/rtHz,

65 MSPS input signals. Programmable active termination is C

98 mW/CH at 1.1 nV/rtHz,

40 MSPS also supported by the LNA. The ultra-low noise VCAT provides an attenuation control range of 40dB and C

80 mW/CH at CW Mode improves overall low gain SNR which benefits ? Excellent Device-to-Device Gain Matching harmonic imaging and near field imaging. The PGA C ±0.5 dB(typical) and ±0.9 dB(max) provides gain options of

24 dB and

30 dB. Before the ADC, a LPF can be configured as

10 MHz,

15 MHz, ? Low Harmonic Distortion

20 MHz or

30 MHz to support ultrasound applications ? Fast and Consistent Overload Recovery with different frequencies. The high-performance

14 ? Passive Mixer for Continuous Wave bit/65 MSPS ADC in the AFE5808 achieves

77 dBFS Doppler(CWD) SNR. It ensures excellent SNR at low chain gain. The ADC'

s LVDS outputs enable flexible system C Low Close-in Phase Noise C156 dBc/Hz at

1 integration desired for miniaturized systems. KHz off 2.5 MHz Carrier C Phase Resolution of 1/16λ C Support 16X, 8X, 4X and 1X CW Clocks C 12dB Suppression on 3rd and 5th Harmonics C 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 ? 2010C2012, 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. AFE5808 SLOS688C CSEPTEMBER 2010CREVISED APRIL