VCA5807
www.ti.com
SLOS727 –DECEMBER 2012
Fully Integrated, 8-Channel Voltage Controlled Amplifier for Ultrasound with Passive CW
Mixer, 0.75 nV/rtHz, 99 mW/CH
Check for Samples: VCA5807
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FEATURES
DESCRIPTION
The VCA5807 is an integrated Voltage Controlled
Amplifier (VCA) specifically designed for ultrasound
systems in which high performance and small size
are required. The VCA5807 integrates a complete
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8-Channel Voltage Controlled Amplifier
LNA, VCAT, PGA, LPF, and CW Mixer
Programmable Low-Noise Amplifier (LNA)
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time-gain-control (TGC) imaging path and
a
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24/18/12 dB Gain
continuous wave Doppler (CWD) path. It also enables
users to select one of various power/noise
combinations to optimize system performance.
Therefore, the VCA5807 is a suitable ultrasound
analog front end solution not only for high-end
systems, but also for portable systems.
0.25/0.5/1 VPP Linear Input Range
0.63/0.7/0.9 nV/rtHz Input Referred Noise
Programmable Active Termination
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40 dB Low Noise Voltage Controlled
Attenuator (VCAT)
The VCA5807 contains eight channels of voltage
controlled amplifier (VCA), and CW mixer. 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 mVPP to 1 VPP input
signals. Programmable active termination is also
supported by the LNA. The ultra-low noise VCAT
provides an attenuation control range of 40dB 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. In addition, the
signal chain of the VCA5807 can handle signal
frequency lower than 100 KHz, which enables it to be
used not only in ultrasound applications but also in
sonar applications.
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24/30 dB Programmable Gain Amplifier (PGA)
3rd Order Linear Phase Low-Pass Filter (LPF)
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10, 15, 20, 30 MHz
Butterworth Characteristics
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Noise/Power Optimizations (Full Chain)
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99 mW/CH at 0.75 nV/rtHz
56 mW/CH at 1.1 nV/rtHz
80 mW/CH at CW Mode
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Excellent Device-to-Device Gain Matching
±0.5 dB (typical) and ±1.05 dB (max)
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Low Harmonic Distortion
Fast and Consistent Overload Recovery
Low Frequency Sonar Signal Processing
Passive Mixer for Continuous Wave Doppler
(CWD)
The VCA5807 integrates a low power passive mixer
and a low noise summing amplifier to accomplish on-
chip CWD beamformer. 16 selectable phase-delays
can be applied to each analog input signal.
Meanwhile a unique 3rd and 5th order harmonic
suppression filter is implemented to enhance CW
sensitivity.
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Low Close-in Phase Noise –156 dBc/Hz at 1
KHz off 2.5 MHz Carrier
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Phase Resolution of 1/16λ
Support 32X,16X, 8X, 4X and 1X CW Clocks
12dB Suppression on 3rd and 5th Harmonics
Flexible Input Clocks
The VCA5807 is available in a 14mm x 14mm, 100-
pin TQFP package and it is specified for operation
from -40°C to 85°C.
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14mm x 14mm, 100-pin TQFP
APPLICATIONS
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Medical Ultrasound Imaging
Nondestructive Evaluation Equipments
Sonar Imaging
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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.
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
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