AFE5816_15 Datasheet, PDF (1/9 Pages) Texas Instruments – AFE5816 16-Channel Ultrasound AFE with 90-mW/Channel Power, 1-nV/√Hz Noise, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC and Passive CW Mixer

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AFE5816
SBAS688C – APRIL 2015 – REVISED AUGUST 2015
AFE5816 16-Channel Ultrasound AFE with 90-mW/Channel Power,
1-nV/√Hz Noise, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC and Passive CW Mixer
1 Features
• 16-Channel, AFE for Ultrasound Applications:
– Input Attenuator, LNA, LPF, ADC, and
CW Mixer
– Digital Time Gain Compensation (DTGC)
– Total Gain Range: 6 dB to 45 dB
– Linear Input Range: 1 V_PP
• Input Attenuator with DTGC:
– 8-dB to 0-dB Attenuation with 0.125-dB Step
– Supports Matched Impedance for:
– 50-Ω to 800-Ω Source Impedance
• Low-Noise Amplifier (LNA) with DTGC:
– 14-dB to 45-dB Gain with 0.125-dB Step
– Low Input Current Noise: 1.2 pA/√Hz
• 3rd-Order, Linear-Phase, Low-Pass Filter (LPF):
– 10 MHz, 15 MHz, 20 MHz, and 25 MHz
• Analog-to-Digital Converter (ADC):
– 14-Bit ADC: 75-dBFS SNR at 65 MSPS
– 12-Bit ADC: 72-dBFS SNR at 80 MSPS
• LVDS Interface with a Maximum Speed Up to
1 GBPS
• Optimized for Noise and Power:
– 90 mW/Ch at 1 nV/√Hz, 65 MSPS
– 55 mW/Ch at 1.45 nV/√Hz, 40 MSPS
– 59 mW/Ch in CW Mode
• Excellent Device-to-Device Gain Matching:
– ±0.5 dB (Typical)
• Low Harmonic Distortion: –60-dBc Level
1
• Fast and Consistent Overload Recovery
• Continuous Wave (CW) Path with:
– Low Close-In Phase Noise of –148 dBc/Hz
at 1-kHz frequency
– Phase Resolution: λ / 16
– Supports 16X, 8X, 4X, and 1X CW Clocks
• Small Package: 15-mm × 15-mm NFBGA-289
2 Applications
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipment
• Sonar Imaging Equipment
• Multichannel, High-Speed Data Acquisition
3 Description
The AFE5816 is a highly-integrated, analog front-end
(AFE) solution specifically designed for ultrasound
systems where high performance, low power, and
small size are required.
Device Information⁽¹⁾
PART NUMBER
OUTPUT
INTERFACE
DIGITAL I/Q
DEMODULATOR
AFE5816
LVDS only
Not supported
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Simplified Block Diagram
SPI IN
SPI Logic
INP
ATTEN
±8 dB
to
0 dB
INM
LNA
14 dB to
45 dB
3^rd-Order LPF with
10 MHz, 15 MHz,
20 MHz, and 25 MHz
TGC Control
Signals
DTGC Engine
16 x 16
Cross-Point
Switch
16-Phase
Generator
CW Clocks
CW Mixer
CW Current Outputs
12- or
14-Bit
ADC
Reference
Digital
Processing
LVDS
1 of 16 Channels
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.