AFE5828 Datasheet, PDF (1/6 Pages) Texas Instruments – 16-Channel Ultrasound AFE with 102-mW/Channel Power, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC, LVDS Interface, and Passive CW Mixer

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AFE5828
SBAS865 – JULY 2017
AFE5828 16-Channel Ultrasound AFE with 102-mW/Channel Power,
0.8-nV/√Hz Noise, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC, LVDS Interface,
and Passive CW Mixer
1 Features
• 16-Channel AFE for Ultrasound Applications:
– Optimized Signal Chains for TGC and CW
Modes
– Four Programmable TGC Profiles
• Low-Noise Amplifier (LNA) With:
– Programmable Gain: 21 dB, 18 dB, and 15 dB
– Linear Input Signal Amplitude:
0.37 V_PP, 0.5 V_PP, and 0.71 V_PP
– Active Termination
• Voltage-Controlled Attenuator (VCAT):
– Attenuation Range: 0 dB–36 dB
• Programmable Gain Amplifier (PGA):
– 18 dB–27 dB in Steps of 3 dB
• 3rd-Order, Linear-Phase, Low-Pass Filter (LPF):
– Cutoff Frequency From 10 MHz to 30 MHz
• ADC Modes (Idle-Channel SNR):
– 14-Bit, 65-MSPS Mode: 75-dBFS
– 12-Bit, 80-MSPS Mode: 72-dBFS
• Optimized for Noise and Power:
– TGC Mode: 102 mW/Ch at 0.8 nV/√Hz,
65-MSPS, 14-Bit Output
– CW Mode: 63 mW/Ch
• Excellent Device-to-Device Gain Matching:
– ±0.4 dB (Typical)
• Fast and Consistent Overload Recovery
1
• Continuous Wave (CW) Path With:
– Low Close-In Phase Noise of –159 dBc/Hz at
1-kHz Frequency Offset off 2.5-MHz Carrier
– Phase Resolution: λ / 16
– Supports 16x and 8x CW Clocks
– 12-dB Suppression of 3rd and 5th Harmonics
• LVDS Interface With a Speed Up to 1 Gbps
• Small Package: 15-mm × 15-mm NFBGA-289
2 Applications
• Medical Ultrasound Imaging
• Nondestructive Evaluation Equipment
• Sonar Imaging Equipment
3 Description
The AFE5828 device is a highly-integrated, analog
front-end (AFE) solutions specifically designed for
ultrasound systems where high performance, low
power, and small size are required.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
AFE5828
nFBGA (289)
15.00 mm × 15.00 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
SPACE
Simplified Block Diagram
SPI IN
SPI Logic
SPI OUT
LNA IN
16X CLK
1X CLK
LNA
15 dB to
21 dB
VCAT
0 dB to -36 dB
PGA
18 dB to 27 dB
In Step of 3 dB
3rd-Order LPF
with 10 MHz to
30 MHz Corner
Frequency
12-, 14-Bit
ADC
16 Phases
Generator
CW Mixer
16 x 16
Crosspoint SW
1X CLK
Summing
Amplifier
CW I/Q
OUTPUT
Reference
Reference
Differential
TGC VCNTL
Digital
Processing
(Optional)
LVDS
1 of 16 Channels
LVDS
OUTPUTS
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.