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AFE5809

ACTIVE

Fully-Integrated, 8-Ch Ultrasound Analog Front End w/ Passive CW Mixer and Digital I/Q Demodulation

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Data sheet

AFE5809

ACTIVE
Data sheet Order now

Product details

Device type Receiver Number of input channels 8 Active supply current (typ) (mA) 133 Supply voltage (max) (V) 3.6 Operating temperature range (°C) 0 to 85 Interface type LVDS Features Analog Front End (AFE) Rating Catalog
Device type Receiver Number of input channels 8 Active supply current (typ) (mA) 133 Supply voltage (max) (V) 3.6 Operating temperature range (°C) 0 to 85 Interface type LVDS Features Analog Front End (AFE) Rating Catalog
NFBGA (ZCF) 135 135 mm² 9 x 15
  • 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)
  • Third-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 (Without Digital
    Demodulator)
    • 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
  • Excellent Device-to-Device Gain Matching
    • ±0.5 dB (Typical) and ±1 dB (Maximum)
  • Digital I/Q Demodulator after ADC
    • Wide Range Demodulation Frequency
    • <1 kHz 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 16×, 8×, 4×, and 1× CW Clocks
    • 12-dB Suppression on Third and Fifth
      Harmonics
    • Flexible Input Clocks
  • Small Package: 15 mm × 9 mm, 135-BGA
  • 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)
  • Third-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 (Without Digital
    Demodulator)
    • 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
  • Excellent Device-to-Device Gain Matching
    • ±0.5 dB (Typical) and ±1 dB (Maximum)
  • Digital I/Q Demodulator after ADC
    • Wide Range Demodulation Frequency
    • <1 kHz 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 16×, 8×, 4×, and 1× CW Clocks
    • 12-dB Suppression on Third and Fifth
      Harmonics
    • Flexible Input Clocks
  • Small Package: 15 mm × 9 mm, 135-BGA

The AFE5809 device is a highly-integrated analog front-end (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE5809 device integrates a complete time-gain-control (TGC) imaging path and a CWD path. The device also enables users to select one of various power and noise combinations to optimize system performance. Therefore, the AFE5809 device is a suitable ultrasound AFE solution not only for high-end systems, but also for portable ones.

The AFE5809 device contains eight channels of voltage controlled amplifier (VCA), 14, and 12-bit ADC, and CW mixer. The VCA includes LNA, VCAT, PGA, and 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 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. In addition, the signal chain of the AFE5809 device can handle signal frequency lower than 100 kHz, which enables the device to be used in both sonar and medical applications. The high-performance 14-bit/65-MSPS ADC in the AFE5809 device 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.

The AFE5809 device 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 third- and fifth-order harmonic suppression filter is implemented to enhance CW sensitivity.

The AFE5809 device also includes a digital in-phase and quadrature (I/Q) demodulator and a low-pass decimation filter. The main purpose of the demodulation block is to reduce the LVDS data rate and improve overall system power efficiency. The I/Q demodulator can accept ADC output with up to 65 MSPS sampling rate and 14-bit resolution. For example, after digital demodulation and 4× decimation filtering, the data rate for either in-phase or quadrature output is reduced to 16.25 MSPS and the data resolution is improved to 16 bits, consequently. Hence, the overall LVDS trace reduction can be a factor of 2. This demodulator can be bypassed and powered down completely if it is not needed.

The AFE5809 device is available in a 15-mm × 9-mm, 135-pin BGA package, and it is specified for operation from 0°C to 85°C.

Note: AFE5809 with date code later than 2014, that is date code >41XXXX, has below additional features which can be enabled by Register 61[15,14,13]. Existing analog performance remains the same.

  • 61[13] enables an additional voltage clamp at the V2I input of the PGA. This limits the amount of overload signal the PGA sees.
  • 61[14] enables a first-order 5-MHz LPF filter to suppress signals >5 MHz or high-order harmonics.
  • 61[15] enables a –6-dB PGA clamp setting. The actual PGA output is less than the ADC’s full-scale amplitude, 2 Vpp.

The AFE5809 device is a highly-integrated analog front-end (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE5809 device integrates a complete time-gain-control (TGC) imaging path and a CWD path. The device also enables users to select one of various power and noise combinations to optimize system performance. Therefore, the AFE5809 device is a suitable ultrasound AFE solution not only for high-end systems, but also for portable ones.

The AFE5809 device contains eight channels of voltage controlled amplifier (VCA), 14, and 12-bit ADC, and CW mixer. The VCA includes LNA, VCAT, PGA, and 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 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. In addition, the signal chain of the AFE5809 device can handle signal frequency lower than 100 kHz, which enables the device to be used in both sonar and medical applications. The high-performance 14-bit/65-MSPS ADC in the AFE5809 device 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.

The AFE5809 device 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 third- and fifth-order harmonic suppression filter is implemented to enhance CW sensitivity.

The AFE5809 device also includes a digital in-phase and quadrature (I/Q) demodulator and a low-pass decimation filter. The main purpose of the demodulation block is to reduce the LVDS data rate and improve overall system power efficiency. The I/Q demodulator can accept ADC output with up to 65 MSPS sampling rate and 14-bit resolution. For example, after digital demodulation and 4× decimation filtering, the data rate for either in-phase or quadrature output is reduced to 16.25 MSPS and the data resolution is improved to 16 bits, consequently. Hence, the overall LVDS trace reduction can be a factor of 2. This demodulator can be bypassed and powered down completely if it is not needed.

The AFE5809 device is available in a 15-mm × 9-mm, 135-pin BGA package, and it is specified for operation from 0°C to 85°C.

Note: AFE5809 with date code later than 2014, that is date code >41XXXX, has below additional features which can be enabled by Register 61[15,14,13]. Existing analog performance remains the same.

  • 61[13] enables an additional voltage clamp at the V2I input of the PGA. This limits the amount of overload signal the PGA sees.
  • 61[14] enables a first-order 5-MHz LPF filter to suppress signals >5 MHz or high-order harmonics.
  • 61[15] enables a –6-dB PGA clamp setting. The actual PGA output is less than the ADC’s full-scale amplitude, 2 Vpp.
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Technical documentation

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* Data sheet AFE5809 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 datasheet (Rev. E) PDF | HTML 25 Aug 2014
Design guide SONAR Receiver Path Sub-System Using the AFE5809 Design Guide 23 Nov 2014
Application note Understanding Serial LVDS Capture in High-Speed ADCs 10 Jul 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

AFE5809EVM — AFE5809 Evaluation Module

The AFE5809 is a highly integrated Analog Front-End (AFE) solution specifically designed for ultrasound systems in which high performance and small size are required. The AFE5809 integrates a complete time-gain-control (TGC) imaging path and a continuous wave Doppler (CWD) path. It also enables (...)

User guide: PDF
Not available on TI.com
GUI for evaluation module (EVM)

DATACONVERTERPRO-SW — High Speed Data Converter Pro GUI Installer, v5.31

This high-speed data converter pro GUI is a PC (Windows® XP/7/10 compatible) program designed to aid in evaluation of most TI high-speed data converter [analog-to-digital converter (ADC) and digital-to-analog converter (DAC)] and analog front-end (AFE) platforms. Designed to support the entire (...)

Supported products & hardware

Supported products & hardware
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GUI for evaluation module (EVM)

SLOC276 — AFE5809EVM GUI

Supported products & hardware

Supported products & hardware
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Simulation model

AFE5809 PSpice Model

SLOM334.ZIP (74 KB) - PSpice Model
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Simulation model

AFE5809 PSpice Transient Model

SLOM331.ZIP (46 KB) - PSpice Model
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Simulation model

AFE5809 TINA-TI Reference Design

SLOM335.TSC (106 KB) - TINA-TI Reference Design
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Simulation model

AFE5809 TINA-TI Spice Model

SLOM336.ZIP (63 KB) - TINA-TI Spice Model
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Simulation model

AFE5809 TINA-TI Transient Reference Design

SLOM333.TSC (63 KB) - TINA-TI Reference Design
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Simulation model

AFE5809 TINA-TI Transient Spice Model

SLOM332.ZIP (35 KB) - TINA-TI Spice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

TIDA-00419 — SONAR Receiver Path Sub-System Reference Design Using an 8 Channel Analog Front End

This reference design is a demonstration of a SONAR receive-path sub-system using the integrated analog front end (AFE) AFE5809. AFE5809 features eight channels of analog signal conditioning  (LNA + VCAT + PGA) and digital processing (ADC + digital demodulator) that brings a high (...)
Design guide: PDF
Schematic: PDF
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NFBGA (ZCF) 135 Ultra Librarian
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