AFE5816 Datasheet, PDF (1/162 Pages) Texas Instruments – 16-Channel Ultrasound AFE

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AFE5816
SBAS688D – APRIL 2015 – REVISED NOVEMBER 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
– Optimized Signal Chains for TGC and CW
Modes
– 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) with
Programmable Resolution:
– 14-Bit ADC: 75-dBFS Idle Channel SNR at
65 MSPS
– 12-Bit ADC: 72-dBFS Idle Channel 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, TGC Mode
– 55 mW/Ch at 1.45 nV/√Hz, 40 MSPS,
TGC Mode
– 59 mW/Ch, CW Mode
1
• Excellent Device-to-Device Gain Matching:
– ±0.5 dB (Typical)
• Low Harmonic Distortion: –60-dBc Level
• Fast and Consistent Overload Recovery
• Continuous Wave (CW) Path with:
– Passive Mixer
– 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
– 12-dB Suppression of 3rd and 5th Harmonics
• 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
PACKAGE
BODY SIZE (NOM)
AFE5816
nFBGA (289)
15.00 mm x 15.00 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Simplified Block Diagram
SPI IN
SPI Logic
SPI OUT
INP
ATTEN
LNA
14 dB to
45 dB
INM
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-, 14-Bit
ADC
Reference
Digital
Processing
(Optional)
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.