AFE5803_14 Datasheet, PDF (1/53 Pages) Texas Instruments – Fully Integrated, 8-Channel Ultrasound Analog Front End, 0.75 nV/rtHz, 14/12-Bit, 65 MSPS, 158 mW/CH

AFE5803
www.ti.com
SLOS763A – JANUARY 2012 – REVISED JANUARY 2012
Fully Integrated, 8-Channel Ultrasound Analog Front End,
0.75 nV/rtHz, 14/12-Bit, 65 MSPS, 158 mW/CH
Check for Samples: AFE5803
FEATURES
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• 8-Channel Complete Analog Front-End
– LNA, VCAT, PGA, LPF, ADC
• Programmable Gain Low-Noise Amplifier
(LNA)
– 24/18/12 dB Gain
– 0.25/0.5/1 V_PP Linear Input Range
– 0.63/0.7/0.9 nV/rtHz Input Referred Noise
– Programmable Active Termination
• 40 dB Low Noise Voltage Controlled
Attenuator (VCAT)
• 24/30 dB Programmable Gain Amplifier (PGA)
• 3^rd Order Linear Phase Low-Pass Filter (LPF)
– 10, 15, 20, 30 MHz
• 14-bit Analog to Digital Converter (ADC)
– 77 dBFS SNR at 65 MSPS
– LVDS Outputs
• Noise/Power Optimizations (Full Chain)
– 158 mW/CH at 0.75 nV/rtHz, 65 MSPS
– 101 mW/CH at 1.1 nV/rtHz, 40 MSPS
• Excellent Device-to-Device Gain Matching
– ±0.5 dB (Typical) and ±0.9 dB (Max)
• Low Harmonic Distortion
• Fast and Consistent Overload Recovery
• Small Package: 15 mm x 9 mm, 135-BGA
APPLICATIONS
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipments
DESCRIPTION
The AFE5803 is a highly integrated Analog Front-End
(AFE) solution specifically designed for ultrasound
systems in which high performance and small size
are required. The AFE5803 integrates a complete
time-gain-control (TGC) imaging path. It also enables
users to select one of various power/noise
combinations to optimize system performance.
Therefore, the AFE5803 is a suitable ultrasound
analog front end solution for portable systems.
The AFE5803 contains eight channels of voltage
controlled amplifier (VCA), 14/12-bit Analog-to-Digital
Converter (ADC). The VCA includes Low noise
Amplifier (LNA), Voltage controlled Attenuator
(VCAT), Programmable Gain Amplifier (PGA), and
Low-Pass Filter (LPF). The LNA gain is
programmable to support 250 mV_PP to 1 V_PP input
signals. Programmable active termination is also
supported by the LNA. The ultra-low noise VCAT
provides an attenuation control range of 40 dB and
improves overall low gain SNR which benefits
harmonic imaging and near field imaging. The PGA
provides gain options of 24 dB and 30 dB. Before the
ADC, a LPF can be configured as 10 MHz, 15 MHz,
20 MHz or 30 MHz to support ultrasound applications
with different frequencies. The high-performance
14bit/65 MSPS ADC in the AFE5803 achieves
77dBFS SNR. It ensures excellent SNR at low chain
gain. The ADC’s LVDS outputs enable flexible system
integration desired for miniaturized systems.
The AFE5803 is available in a 15mm × 9mm, 135-pin
BGA package and it is specified for operation from
0°C to 85°C. It is also pin-to-pin compatible to the
AFE5807, AFE5808 and AFE5808A.
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated