AFE5808A_17 Datasheet, PDF (1/83 Pages) Texas Instruments – 65-MSPS, 158 mW/Channel, Fully-Integrated, 8-Channel, 14- and 12-Bit, Ultrasound Analog Front-End With Passive CW Mixer

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AFE5808A
SLOS729D – OCTOBER 2011 – REVISED NOVEMBER 2015
AFE5808A 0.75 nV/√Hz, 65-MSPS, 158 mW/Channel, Fully-Integrated, 8-Channel,
14- and 12-Bit, Ultrasound Analog Front-End With Passive CW Mixer
1 Features
• 8-Channel Complete Analog Front-End
– LNA, VCAT, PGA, LPF, ADC, and CW Mixer
• Programmable Gain Low-Noise Amplifier (LNA)
– 24-, 18-, or 12-dB Gain
– 0.25-, 0.5-, or 1-V_PP Linear Input Range
– 0.63-, 0.7-, or 0.9-nV/√Hz Input-Referred Noise
– Programmable Active Termination
• 40-dB, Low-Noise Voltage-Controlled Attenuator
(VCAT)
• 24-, or 30-dB Programmable Gain Amplifier (PGA)
• 3rd-Order, Linear-Phase, Low-Pass Filter (LPF)
– 10 MHz, 15 MHz, 20 MHz, or 30 MHz
• 14-bit Analog-to-Digital Converter (ADC)
– 77-dBFS SNR at 65 MSPS
– LVDS Outputs
• Noise and Power Optimizations (Full Chain)
– 158 mW/CH at 0.75 nV/√Hz, 65 MSPS
– 101 mW/CH at 1.1 nV/√Hz, 40 MSPS
– 80 mW/CH in CW Mode
• Excellent Device-to-Device Gain Matching
– ±0.5 dB (Typical) and ±0.9 dB (Maximum)
• 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
1
– Phase Resolution of 1/16λ
– Support 16X, 8X, 4X and 1X CW Clocks
– 12-dB Suppression on 3rd and 5th Harmonics
– Flexible Input Clocks
• Small Package: 15-mm × 9-mm, 135-Pin NFBGA
2 Applications
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipments
3 Description
The AFE5808A is a highly-integrated, analog front-
end (AFE) solution specifically designed for
ultrasound systems in which high performance and
small size are required. The AFE5808A integrates a
complete time-gain-control (TGC) imaging path and a
continuous wave Doppler (CWD) path. This device
also enables users to select one of various power
and noise combinations to optimize system
performance. Therefore, the AFE5808A is an
outstanding ultrasound analog front-end solution not
only for high-end systems, but also for portable ones.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
AFE5808A
NFBGA (135) 9.00 mm × 15.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Block Diagram
SPI IN
SPI Logic
AFE5808A (1 of 8 Channels)
SPI OUT
LNA IN
16X CLK
1X CLK
LNA
VCAT
0 to -40dB
PGA
24, 30dB
3^rd LP Filter
10, 15, 20,
30 MHz
14Bit _LVDS
ADC
16 Phases
Generator
CW Mixer
16X8
Crosspoint SW
1X CLK
Summing
Amplifier
Reference Reference
CW I/Q Vout
Differential EXT/INT
TGC VCNTL REFs
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.