AFE5812_15 Datasheet, PDF (1/109 Pages) Texas Instruments – AFE5812 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, 180 mW/CH

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AFE5812
SLOS816A – MARCH 2015 – REVISED MARCH 2015
AFE5812 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, 180 mW/CH
1 Features
•1 8-Channel Complete Analog Front-End
– LNA, VCAT, PGA, LPF, ADC, and CW Mixer
• Programmable Gain Low-Noise Amplifier (LNA)
– 24, 18, 15 dB Gain
– 0.25, 0.5, 0.7 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, 35, 50 MHz
• 14-bit Analog to Digital Converter w/ LVDS output
– 77 dBFS SNR at 65 MSPS
• Noise/Power Optimizations (Without Digital
Demodulator)
– 180 mW/CH at 0.75 nV/rtHz, 65 MSPS
– 109 mW/CH at 1.1 nV/rtHz, 40 MSPS
– 107 mW/CH at CW Mode
• Excellent Device-to-Device Gain Matching
– ±0.5 dB(typical) and ±1.1 dB(max)
• Programmable Digital I/Q Demodulator after ADC
– Wide Range Demodulation Frequency
– <1KHz Frequency Resolution
– Decimation Filter Factor M = 1 to 32
– 16xM tap FIR Decimation Filter
– LVDS Rate Reduction after Demodulation
– On-chip RAM with 32 preset Profiles
• Low Harmonic Distortion
• Low Frequency Sonar Signal Processing
• 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
• Small Package: 15 mm x 9 mm, 135-BGA
• Operation Temperature: -40°C to 85°C
2 Applications
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipments
• Sonar applications
• Multichannel, High-Speed Data Acquisition
3 Description
The AFE5812 is a highly-integrated analog front-end
(AFE) solution specifically designed for ultrasound
systems in which high performance and small size
are required. The AFE5812 integrates a complete
time-gain-control (TGC) imaging path and a CWD
path. It also enables users to select one of various
power/noise combinations to optimize system
performance. Therefore, the AFE5812 is a suitable
ultrasound AFE solution not only for high-end
systems, but also for portable ones.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
AFE5812
NFBGA (135)
15.00 mm × 9.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Diagram
SPI
SPI Logic
AFE5812 with Demodulator : 1 of 8 Channels
IN
LNA
VCAT
0 to -40 dB
PGA
24, 30dB
3^rd LP Filter
10, 15, 20, 30
35, 50 MHz
14 Bit
ADC
Digital
Demod &
Dec Filter
LVDS LVDS
Serializer OUT
16X CLKP
16X CLKN
16 Phases
Generator
1X CLK
CW Mixer
Summing
Amplifier/ Filter
Reference
Reference
Logic
Control
CW I/Q Vout
Differential
TGC Vcntl
EXT/INT
REFM/P
DeMod
Control
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.