AFE5808A Front-End Datasheet

AFE5808A Datasheet, PDF, Equivalent


Part Number

AFE5808A

Description

8-Channel Ultrasound Analog Front-End

Manufacture

etcTI

Total Page 30 Pages
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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-VPP 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
3rd 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.

AFE5808A
AFE5808A
SLOS729D – OCTOBER 2011 – REVISED NOVEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 5
6 Pin Configuration and Functions ......................... 6
7 Specifications......................................................... 9
7.1 Absolute Maximum Ratings ...................................... 9
7.2 ESD Ratings.............................................................. 9
7.3 Recommended Operating Conditions....................... 9
7.4 Thermal Information .................................................. 9
7.5 Electrical Characteristics........................................ 10
7.6 Digital Characteristics ............................................ 15
7.7 Switching Characteristics....................................... 16
7.8 Timing Requirements .............................................. 16
7.9 Output Interface Timing ......................................... 17
7.10 Typical Characteristics .......................................... 19
8 Detailed Description ............................................ 29
8.1 Overview ................................................................. 29
8.2 Functional Block Diagram ....................................... 29
8.3 Feature Description................................................. 29
8.4 Device Functional Modes........................................ 41
8.5 Programming .......................................................... 44
8.6 Register Maps ......................................................... 46
9 Application and Implementation ........................ 57
9.1 Application Information............................................ 57
9.2 Typical Application ................................................. 58
9.3 Do's and Don'ts ...................................................... 72
10 Power Supply Recommendations ..................... 73
11 Layout................................................................... 74
11.1 Layout Guidelines ................................................. 74
11.2 Layout Example .................................................... 75
12 Device and Documentation Support ................. 79
12.1 Related Documentation......................................... 79
12.2 Community Resources.......................................... 79
12.3 Trademarks ........................................................... 79
12.4 Electrostatic Discharge Caution ............................ 79
12.5 Glossary ................................................................ 79
13 Mechanical, Packaging, and Orderable
Information ........................................................... 79
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (January 2014) to Revision D
Page
• Added Device Information and ESD Ratings tables, and Detailed Description, Application and Implementation,
Power Supply Recommendations, Layout, Device and Documentation Support, and Mechanical, Packaging, and
Orderable Information sections. ............................................................................................................................................. 1
• Updated Pin Diagram. ........................................................................................................................................................... 6
• Deleted Packaging/Ordering Information table....................................................................................................................... 9
• Updated ESD values to ±1000 (HBM) and ±250 (CDM). ...................................................................................................... 9
• Updated ω0t+22.5to ω0t-22.5in Equation 2 ..................................................................................................................... 35
• Updated t+1/16f0 to t-1/16f0 in Equation 3 ........................................................................................................................... 37
• Added Application Companion Devices table. .................................................................................................................... 57
• Added Figure 85. ................................................................................................................................................................. 64
Changes from Revision B (April 2012) to Revision C
Page
• Changed pin description of CLKM_16X from "In the 1X CW clock mode, this pin becomes the quadrature-phase 1X
CLKM for the CW mixer" to "... in-phase 1X CLKM for the CW mixer".................................................................................. 7
• Changed pin description of CLKP_16X from "In the 1X CW clock mode, this pin becomes the quadrature-phase 1X
CLKP for the CW mixer" to "... in-phase 1X CLKP for the CW mixer" ................................................................................... 7
• Changed pin description of CLKM_1X from "In the 1X CW clock mode, this pin becomes the in-phase 1X CLKP for
the CW mixer" to "... quadrature-phase 1X CLKP for the CW mixer" .................................................................................... 7
• Changed pin description of CLKP_1X from "In the 1X CW clock mode, this pin becomes the in-phase 1X CLKP for
the CW mixer" to "... quadrature-phase 1X CLKP for the CW mixer" .................................................................................... 7
• Added min and max columns to Absolute Maximum Ratings table ....................................................................................... 9
• Changed CLK duty cycle from "35%~65%" to "33% to 66%" .............................................................................................. 12
• Deleted "In the 16X operation mode, the CW operation range is limited to 8 MHz due to the 16X CLK. The
maximum clock frequency for the 16X CLK is 128 MHz. " in the footnote for CW Operation Range ................................. 12
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Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community AFE5808A SLOS729D – OCTOBE R 2011 – REVISED NOVEMBER 2015 AFE580 8A 0.75 nV/√Hz, 65-MSPS, 158 mW/Chann el, Fully-Integrated, 8-Channel, 14- an d 12-Bit, Ultrasound Analog Front-End W ith Passive CW Mixer 1 Features • 8- Channel Complete Analog Front-End – L NA, VCAT, PGA, LPF, ADC, and CW Mixer Programmable Gain Low-Noise Amplifie r (LNA) – 24-, 18-, or 12-dB Gain – 0.25-, 0.5-, or 1-VPP Linear Input Ran ge – 0.63-, 0.7-, or 0.9-nV/√Hz Inp ut-Referred Noise – Programmable Acti ve Termination • 40-dB, Low-Noise Vol tage-Controlled Attenuator (VCAT) • 2 4-, or 30-dB Programmable Gain Amplifie r (PGA) • 3rd-Order, Linear-Phase, Lo w-Pass Filter (LPF) – 10 MHz, 15 MHz, 20 MHz, or 30 MHz • 14-bit Analog-to -Digital Converter (ADC) – 77-dBFS SN R 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 • Excelle.
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