AFE5807
www.ti.com
SLOS703B –SEPTEMBER 2010–REVISED APRIL 2012
Fully Integrated, 8-Channel Ultrasound Analog Front End with
Passive CW Mixer,
1.05 nV/rtHz, 12-Bit, 80 MSPS, 117 mW/CH
Check for Samples: AFE5807
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FEATURES
APPLICATIONS
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8-Channel Complete Analog Front-End
LNA, VCAT, PGA, LPF, ADC, and CW Mixer
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Medical Ultrasound Imaging
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Nondestructive Evaluation Equipments
DESCRIPTION
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Programmable Gain Low-Noise Amplifier
(LNA)
The AFE5807 is an integrated Analog Front-End
(AFE) solution specifically designed for ultrasound
systems in which high performance and small size
are required. The AFE5807 integrates a complete
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24/18/12 dB Gain
0.25/0.5/1 VPP Linear Input Range
0.63/0.7/0.9 nV/rtHz IRN (Low Noise Mode)
0.99/1.0/1.05 nV/rtHz IRN (Low Power Mode)
Programmable Active Termination
time-gain-control (TGC) imaging path and
a
continuous wave Doppler (CWD) path. It also enables
users to select one of various power/noise
combinations to optimize system performance.
Therefore, the AFE5807 is a suitable ultrasound
analog front end solution not only for high-end
systems, but also for portable systems.
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40 dB Low Noise Voltage Controlled
Attenuator (VCAT)
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24/30 dB Programmable Gain Amplifier (PGA)
3rd Order Linear Phase Low-Pass Filter (LPF)
The AFE5807 contains eight channels of voltage
controlled amplifier (VCA), 12-bit Analog-to-Digital
Converter (ADC), 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 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 12
bit/80 MSPS ADC in the AFE5807 achieves 70 dBFS
SNR. It ensures excellent SNR at low chain gain. The
ADC’s LVDS outputs enable flexible system
integration desired for miniaturized systems. The
AFE5807 also 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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10, 15, 20, 30 MHz
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12-bit Analog to Digital Converter (ADC)
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70 dBFS SNR at 80 MSPS
LVDS Outputs
Noise/Power Optimizations (Full Chain)
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117 mW/CH at 1.05 nV/rtHz, 80 MSPS
159 mW/CH at 0.75 nV/rtHz, 80 MSPS
80 mW/CH at CW Mode
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Excellent Device-to-Device Gain Matching
±0.5 dB(typical) and ±1 dB(max)
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Low Harmonic Distortion
Fast and Consistent Overload Recovery
Passive Mixer for Continuous Wave
Doppler(CWD)
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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 16X, 8X, 4X and 1X CW Clocks
12dB Suppression on 3rd and 5th Harmonics
Flexible Input Clocks
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Small Package: 15 mm x 9 mm, 135-BGA
The AFE5807 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
AFE5808, AFE5803, and AFE5808A.
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