AFE5809
www.ti.com
SLOS738C –SEPTEMBER 2012–REVISED JANUARY 2013
Fully Integrated, 8-Channel Ultrasound Analog Front End with Passive CW Mixer, and
Digital I/Q Demodulator, 0.75 nV/rtHz, 14, 12-Bit, 65 MSPS, 158 mW/CH
Check for Samples: AFE5809
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FEATURES
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8-Channel Complete Analog Front-End
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<1KHz Frequency Resolution
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LNA, VCAT, PGA, LPF, ADC, and CW Mixer
Decimation Filter Factor M = 1 to 64
16xM tap FIR Decimation Filter
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Programmable Gain Low-Noise Amplifier
(LNA)
LVDS Rate Reduction after Demodulation
On-chip RAM with 32 preset Profiles
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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 Input Referred Noise
Programmable Active Termination
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Low Harmonic Distortion
Low Frequency Sonar Signal Processing
Fast and Consistent Overload Recovery
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40 dB Low Noise Voltage Controlled
Attenuator (VCAT)
Passive Mixer for Continuous Wave
Doppler(CWD)
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24/30 dB Programmable Gain Amplifier (PGA)
3rd Order Linear Phase Low-Pass Filter (LPF)
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Low Close-in Phase Noise –156 dBc/Hz at 1
KHz off 2.5 MHz Carrier
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10, 15, 20, 30 MHz
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Phase Resolution of 1/16λ
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14-bit Analog to Digital Converter (ADC)
Support 16X, 8X, 4X and 1X CW Clocks
12dB Suppression on 3rd and 5th Harmonics
Flexible Input Clocks
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77 dBFS SNR at 65 MSPS
LVDS Outputs
Noise, Power Optimizations (Without Digital
Demodulator)
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Small Package: 15 mm x 9 mm, 135-BGA
APPLICATIONS
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158 mW/CH at 0.75 nV/rtHz, 65 MSPS
101 mW/CH at 1.1 nV/rtHz, 40 MSPS
80 mW/CH at CW Mode
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Medical Ultrasound Imaging
Nondestructive Evaluation Equipments
Sonar applications
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Excellent Device-to-Device Gain Matching
±0.5 dB (typical) and ±1 dB (max)
Digital I/Q Demodulator after ADC
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Wide Range Demodulation Frequency
AFE5809 with Demodulator
1 of 8 Channels
SPI
SPI Logic
3rd LP Filter
10, 15, 20, 30
MHz
Digital
DeMod &
LP Filter
PGA
24, 30dB
VCAT
0 to -40 dB
14 Bit
ADC
LVDS
Serializer
LVDS
OUT
IN
LNA
16X CLKP
16X CLKN
Logic
Control
16 Phases
Generator
Summing
Amplifier/ Filter
CW Mixer
Reference
Reference
1X CLK
DeMod
Control
Differential
TGC Vcntl
EXT/INT
REFM/P
CW I/Q Vout
Figure 1. Block Diagram
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