AFE5808A Series

Fully-Integrated, 8-Channel Ultrasound Analog Front End With Passive CW Mixer

Catalog

Fully-Integrated, 8-Channel Ultrasound Analog Front End With Passive CW Mixer

Part	Package / Case	Power (Watts)	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Voltage - Supply, Analog	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Supplier Device Package [x]	Supplier Device Package	Supplier Device Package [y]	Number of Channels	Number of Bits	Mounting Type
Texas Instruments AFE5808AZCF	135-BGA	158 mW	1.7 V	1.9 V	5 V	1.7 V, 3.15 V	1.9 V, 3.6 V	15	135-NFBGA	9	8	12, 14	Surface Mount

Catalog

Fully-Integrated, 8-Channel Ultrasound Analog Front End With Passive CW Mixer

Key Features

• 8-Channel Complete Analog Front-EndLNA, VCAT, PGA, LPF, ADC, and CW MixerProgrammable Gain Low-Noise Amplifier (LNA)24-, 18-, or 12-dB Gain0.25-, 0.5-, or 1-VPPLinear Input Range0.63-, 0.7-, or 0.9-nV/√HzInput-Referred NoiseProgrammable Active Termination40-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 MHz14-bit Analog-to-Digital Converter (ADC)77-dBFS SNR at 65 MSPSLVDS OutputsNoise and Power Optimizations (Full Chain)158 mW/CH at 0.75 nV/√Hz, 65 MSPS101 mW/CH at 1.1 nV/√Hz, 40 MSPS80 mW/CH in CW ModeExcellent Device-to-Device Gain Matching±0.5 dB (Typical) and ±0.9 dB (Maximum)Low Harmonic DistortionFast and Consistent Overload RecoveryPassive Mixer for Continuous Wave Doppler(CWD)Low Close-in Phase Noise: –156 dBc/Hz at 1KHz Off 2.5-MHz CarrierPhase Resolution of 1/16λSupport 16X, 8X, 4X and 1X CW Clocks12-dB Suppression on 3rd and 5th HarmonicsFlexible Input ClocksSmall Package: 15-mm × 9-mm, 135-Pin NFBGA8-Channel Complete Analog Front-EndLNA, VCAT, PGA, LPF, ADC, and CW MixerProgrammable Gain Low-Noise Amplifier (LNA)24-, 18-, or 12-dB Gain0.25-, 0.5-, or 1-VPPLinear Input Range0.63-, 0.7-, or 0.9-nV/√HzInput-Referred NoiseProgrammable Active Termination40-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 MHz14-bit Analog-to-Digital Converter (ADC)77-dBFS SNR at 65 MSPSLVDS OutputsNoise and Power Optimizations (Full Chain)158 mW/CH at 0.75 nV/√Hz, 65 MSPS101 mW/CH at 1.1 nV/√Hz, 40 MSPS80 mW/CH in CW ModeExcellent Device-to-Device Gain Matching±0.5 dB (Typical) and ±0.9 dB (Maximum)Low Harmonic DistortionFast and Consistent Overload RecoveryPassive Mixer for Continuous Wave Doppler(CWD)Low Close-in Phase Noise: –156 dBc/Hz at 1KHz Off 2.5-MHz CarrierPhase Resolution of 1/16λSupport 16X, 8X, 4X and 1X CW Clocks12-dB Suppression on 3rd and 5th HarmonicsFlexible Input ClocksSmall Package: 15-mm × 9-mm, 135-Pin NFBGA

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. The AFE5808A device contains eight voltage controlled amplifiers (VCA), 14- and 12-bit analog-to-digital converters (ADC), and CW mixers. The VCA includes a 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 mVPPto 1 VPPinput signals. Programmable active termination is also supported by the LNA. The ultralow noise VCAT provides an attenuation control range of 40 dB, and improves overall low gain SNR that benefits harmonic imaging and near field imaging. The PGA provides gain options of 24 dB and 30 dB. In front of the ADC, a LPF can be configured as 10 MHz, 15 MHz, 20 MHz, or 30 MHz to support ultrasound applications with different frequencies. The high-performance 14-bit, 65-MSPS ADC in the AFE5808A device achieves 77-dBFS SNR, and ensures excellent SNR at low-chain gain. The ADC LVDS outputs enable flexible system integration desired for miniaturized systems. The AFE5808A device also incorporates a low-power passive mixer and a low-noise summing amplifier to accomplish on-chip CWD beamforming. Sixteen selectable phase-delays can be applied to each analog input signal. A unique 3rd- and 5th-order harmonic-suppression filter is implemented to enhance CW sensitivity. The AFE5808A is available in a 15-mm × 9-mm, 135-pin BGA package and it is specified for operation from 0°C to 85°C. This device is also pin-to-pin compatible with the AFE5803, AFE5807, and AFE5808. NOTE: The AFE5808A is an enhanced version of AFE5808 and is recommended for new designs. Compared to the AFE5808, the AFE5808A expands the cutoff frequency range of the digital high-pass filter; increases the handling capability of extreme overload signals; and lowers the correlated noise significantly when high-impedance source appears. 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. The AFE5808A device contains eight voltage controlled amplifiers (VCA), 14- and 12-bit analog-to-digital converters (ADC), and CW mixers. The VCA includes a 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 mVPPto 1 VPPinput signals. Programmable active termination is also supported by the LNA. The ultralow noise VCAT provides an attenuation control range of 40 dB, and improves overall low gain SNR that benefits harmonic imaging and near field imaging. The PGA provides gain options of 24 dB and 30 dB. In front of the ADC, a LPF can be configured as 10 MHz, 15 MHz, 20 MHz, or 30 MHz to support ultrasound applications with different frequencies. The high-performance 14-bit, 65-MSPS ADC in the AFE5808A device achieves 77-dBFS SNR, and ensures excellent SNR at low-chain gain. The ADC LVDS outputs enable flexible system integration desired for miniaturized systems. The AFE5808A device also incorporates a low-power passive mixer and a low-noise summing amplifier to accomplish on-chip CWD beamforming. Sixteen selectable phase-delays can be applied to each analog input signal. A unique 3rd- and 5th-order harmonic-suppression filter is implemented to enhance CW sensitivity. The AFE5808A is available in a 15-mm × 9-mm, 135-pin BGA package and it is specified for operation from 0°C to 85°C. This device is also pin-to-pin compatible with the AFE5803, AFE5807, and AFE5808. NOTE: The AFE5808A is an enhanced version of AFE5808 and is recommended for new designs. Compared to the AFE5808, the AFE5808A expands the cutoff frequency range of the digital high-pass filter; increases the handling capability of extreme overload signals; and lowers the correlated noise significantly when high-impedance source appears.