AFE5808 Front-End Datasheet

AFE5808 Datasheet, PDF, Equivalent


Part Number

AFE5808

Description

8-Channel Ultrasound Analog Front-End

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download AFE5808 Datasheet


AFE5808
AFE5808
www.ti.com
SLOS688D – SEPTEMBER 2010 – REVISED JANUARY 2014
Fully Integrated, 8-Channel Ultrasound Analog Front End With Passive CW Mixer, 0.75
nV/rtHz, 14/12-Bit, 65 MSPS, 153 mW/CH
Check for Samples: AFE5808
FEATURES
1
• 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 VPP 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)
• 3rd Order Linear Phase Low-Pass Filter (LPF)
– 10, 15, 20, 30 MHz
• 14-bit Analog to Digital Converter (ADC)
– 77 dBFS SNR at 65 MSPS
– LVDS Outputs
• Noise/Power Optimizations (Full Chain)
– 153 mW/CH at 0.75 nV/rtHz, 65 MSPS
– 98 mW/CH at 1.1 nV/rtHz, 40 MSPS
– 80 mW/CH at CW Mode
• Excellent Device-to-Device Gain Matching
– ±0.5 dB (typical) and ±0.9 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
– 12-dB Suppression on 3rd and 5th
Harmonics
– Flexible Input Clocks
• Small Package: 15 mm × 9 mm, 135-BGA
APPLICATIONS
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipments
DESCRIPTION
The AFE5808 is a highly integrated analog front-end
(AFE) solution specifically designed for ultrasound
systems in which high performance and small size
are required. The AFE5808 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 AFE5808 is a suitable ultrasound
analog front end solution not only for high-end
systems, but also for portable ones.
The AFE5808 contains eight channels of voltage
controlled amplifier (VCA), 14/12-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, 15, 20, or 30
MHz to support ultrasound applications with different
frequencies. The high-performance 14 bit/65 MSPS
ADC in the AFE5808 achieves 77 dBFS SNR. It
ensures excellent SNR at low chain gain. The ADC’s
LVDS outputs enable flexible system integration
desired for miniaturized systems.
NOTE
AFE5808A is an enhanced version of AFE5808 and it is recommended for new designs.
Compared to AFE5808, it expands the cut-off frequency range of the digital high pass
filter; increases the handling capability of extreme overload signals; lowers the correlated
noise significantly when high impedance source appears.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010–2014, Texas Instruments Incorporated

AFE5808
AFE5808
SLOS688D – SEPTEMBER 2010 – REVISED JANUARY 2014
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
DESCRIPTION CONTINUED
The AFE5808 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.
The AFE5808 is available in a 15-mm × 9-mm, 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 AFE5807, AFE5803, and AFE5808A.
SPI IN
SPI Logic
AFE5808 (1 of 8 Channels)
SPI OUT
LNA IN
16X CLK
1X CLK
LNA
VCAT
0 to -40dB
PGA
24, 30dB
3rd LP Filter
10, 15, 20,
30 MHz
14Bit LVDS
ADC
16 Phases
Generator
CW Mixer
16X8
Crosspoint SW
1X CLK
Summing
Amplifier
CW I/Q Vout
Figure 1. Block Diagram
Reference Reference
Differential
TGC Vcntl
EXT/INT
REFs
Table 1. PACKAGING/ORDERING INFORMATION(1)
PRODUCT
AFE5808
PACKAGE TYPE
ZCF
OPERATING
0°C to 85°C
ORDERING NUMBER
AFE5808ZCF
TRANSPORT MEDIA,
QUANTITY
Tray, 160
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
2 Submit Documentation Feedback
Product Folder Links: AFE5808
Copyright © 2010–2014, Texas Instruments Incorporated


Features AFE5808 www.ti.com SLOS688D – SEPTEM BER 2010 – REVISED JANUARY 2014 Full y Integrated, 8-Channel Ultrasound Anal og Front End With Passive CW Mixer, 0.7 5 nV/rtHz, 14/12-Bit, 65 MSPS, 153 mW/ CH Check for Samples: AFE5808 FEATURE S 1 • 8-Channel Complete Analog Front -End – LNA, VCAT, PGA, LPF, ADC, and CW Mixer • Programmable Gain Low-Nois e Amplifier (LNA) – 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 Terminati on • 40 dB Low Noise Voltage Controll ed Attenuator (VCAT) • 24/30 dB Progr ammable Gain Amplifier (PGA) • 3rd Or der Linear Phase Low-Pass Filter (LPF) – 10, 15, 20, 30 MHz • 14-bit Analo g to Digital Converter (ADC) – 77 dBF S SNR at 65 MSPS – LVDS Outputs • N oise/Power Optimizations (Full Chain) 153 mW/CH at 0.75 nV/rtHz, 65 MSPS 98 mW/CH at 1.1 nV/rtHz, 40 MSPS – 80 mW/CH at CW Mode • Excellent Devi ce-to-Device Gain Matching – ±0.5 dB (typical) and ±0.9 dB (max) • Low Harmonic Distortion • Fast and Con.
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