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AFE5805 Datasheet(PDF) 1 Page - Texas Instruments |
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AFE5805 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 53 page  LNA 8Channels SPI IN1 IN8 .. .. CH1 LVDS OUT CH8 .. VCA/PGA Clamp and LPF Logic/Controls Reference CWSwitchMatrix(8 10) ´ I (10) OUT 12-Bit ADC AFE5805 AFE5805 www.ti.com SBOS421D – MARCH 2008 – REVISED MARCH 2010 FULLY-INTEGRATED, 8-CHANNEL ANALOG FRONT-END FOR ULTRASOUND 0.85nV/ √Hz, 12-Bit, 50MSPS, 122mW/Channel Check for Samples: AFE5805 1 FEATURES DESCRIPTION 23 • 8-Channel Complete Analog Front-End: The AFE5805 is a complete analog front-end device specifically designed for ultrasound systems that – LNA, VCA, PGA, LPF, and ADC require low power and small size. • Ultra-Low, Full-Channel Noise: The AFE5805 consists of eight channels, including a – 0.85nV/ √Hz (TGC) low-noise amplifier (LNA), voltage-controlled – 1.1nV/ √Hz (CW) attenuator (VCA), programmable gain amplifier • Low Power: (PGA), low-pass filter (LPF), and a 12-bit analog-to-digital converter (ADC) with low voltage – 122mW/Channel (40MSPS) differential signaling (LVDS) data outputs. – 74mW/Channel (CW Mode) The LNA gain is set for 20dB gain, and has excellent • Low-Noise Pre-Amp (LNA): noise and signal handling capabilities, including fast – 0.75nV/ √Hz overload recovery. VCA gain can vary over a 46dB – 20dB Fixed Gain range with a 0V to 1.2V control voltage common to all channels of the AFE5805. – 250mVPP Linear Input Range • Variable-Gain Amplifier: The PGA can be programmed for gains of 20dB, 25dB, 27dB, and 30dB. The internal low-pass filter – Gain Control Range: 46dB can also be programmed to 10MHz or 15MHz. • PGA Gain Settings: 20dB, 25dB, 27dB, 30dB The LVDS outputs of the ADC reduce the number of • Low-Pass Filter: interface lines to an ASIC or FPGA, thereby enabling – Selectable BW: 10MHz, 15MHz the high system integration densities desired for – 2nd-Order portable systems. The ADC can either be operated with internal or external references. The ADC also • Gain Error: ±0.5dB features a signal-to-noise ratio (SNR) enhancement • Channel Matching: ±0.25dB mode that can be useful at high gains. • Distortion, HD2: –65dBFS at 5MHz The AFE5805 is available in a 15mm × 9mm, • Clamping Control 135-ball BGA package that is Pb-free • Fast Overload Recovery: Two Clock Cycles (RoHS-compliant) and green. It is specified for operation from 0°C to +70°C. • 12-Bit Analog-to-Digital Converter: – 10MSPS to 50MSPS – 69.5dB SNR at 10MHz – Serial LVDS Interface • Integrated CW Switch Matrix • 15mm × 9mm, 135-BGA Package: – Pb-Free (RoHS-Compliant) and Green APPLICATIONS • Medical Imaging, Ultrasound – Portable Systems 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. 2 Infineon is a registered trademark of Infineon Technologies. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2010, 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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