AFE5807ZCF Datasheet, PDF (1/74 Pages) Texas Instruments – Fully Integrated, 8-Channel Ultrasound Analog Front End

AFE5807
www.ti.com
SLOS703C – SEPTEMBER 2010 – REVISED MAY 2013
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
FEATURES
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• 8-Channel Complete Analog Front-End
– LNA, VCAT, PGA, LPF, ADC, and CW Mixer
• 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 IRN (Low Noise Mode)
– 0.99/1.0/1.05 nV/rtHz IRN (Low Power Mode)
– 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
• 12-bit Analog to Digital Converter (ADC)
– 70 dBFS SNR at 80 MSPS
– LVDS Outputs
• Noise/Power Optimizations (Full Chain)
– 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
• Excellent Device-to-Device Gain Matching
– ±0.5 dB(typical) and ±1 dB(max)
• Low Harmonic Distortion
• Fast and Consistent Overload Recovery
• Passive Mixer for Continuous Wave
Doppler(CWD)
– Low Close-in Phase Noise –156 dBc/Hz at 1
KHz off 2.5 MHz Carrier
– Phase Resolution of 1/16λ
– Support 16X, 8X, 4X and 1X CW Clocks
– 12dB Suppression on 3^rd and 5^th Harmonics
– Flexible Input Clocks
• Small Package: 15 mm x 9 mm, 135-BGA
APPLICATIONS
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipments
DESCRIPTION
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
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.
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 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 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 3^rd and 5^th order harmonic
suppression filter is implemented to enhance CW
sensitivity.
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. In addtion,
AFE5809 is another member with enhanced digital
demodulation features in this family.
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PRODUCTION DATA information is current as of publication date.
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