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AFE58JD32 Datasheet, PDF (1/9 Pages) Texas Instruments – 32-Channel Ultrasound AFE With 42-mW/Channel Power,12-Bit, 40-MSPS or 10-Bit, 50-MSPS Output, Passive CW Mixer, LVDS and JESD204B Interface, and Digital Demodulator | |||
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AFE58JD32
SBAS880 â AUGUST 2017
AFE58JD32 32-Channel Ultrasound AFE With 42-mW/Channel Power,
1.4 nV/âHz Noise, 12-Bit, 40-MSPS or 10-Bit, 50-MSPS Output, Passive CW Mixer, LVDS
and JESD204B Interface, and Digital Demodulator
1 Features
⢠32-Channel, AFE for Ultrasound Applications:
â Input Attenuator, LNA, LPF, ADC,
Digital I/Q Demodulator and CW Mixer
â Digital Time Gain Compensation (DTGC)
â Total Gain Range: 12 dB to 51 dB
â Linear Input Range: 400 mVPP
⢠Input Attenuator With DTGC:
â 8-dB to 0-dB Attenuation With 0.125-dB Step
â Supports Matched Impedance for:
â 50-Ω to 800-Ω Source Impedance
⢠Low-Noise Amplifier (LNA) With DTGC:
â 20-dB to 51-dB Gain With 0.125-dB Step
â Low Input Current Noise: 1.2 pA/âHz
⢠3rd-Order, Linear-Phase, Low-Pass Filter (LPF):
â 5 MHz, 7.5 MHz, 10 MHz, and 12.5 MHz
⢠16 ADCs Converting at 12-Bit, 80 MSPS or 10-bit,
100 MSPS:
â Each ADC Converts Two Sets of Inputs at Half
Rate
â 12-Bit ADC: 72-dBFS SNR
â 10-Bit ADC: 61-dBFS SNR
⢠Optimized for Noise and Power:
â 42 mW/Ch at 1.4 nV/âHz, 40 MSPS
â 52 mW/Ch at 1.3 nV/âHz, 40 MSPS
â 60 mW/Ch in CW Mode
⢠Excellent Device-to-Device Gain Matching:
â ±0.5 dB (Typical)
⢠Low Harmonic Distortion: â55 dBc
⢠Fast and Consistent Overload Recovery
⢠Continuous Wave (CW) Path With:
â Low Close-In Phase Noise of â151 dBc/Hz
1
at 1-kHz Frequency Offset Off 2.5-MHz Carrier
â Phase Resolution: λ / 16
â Supports 16X CW Clock
â 12-dB Suppression on Third and Fifth
Harmonics
⢠Digital I/Q Demodulator After ADC:
â Decimation Filter M = 1 to 63
â Data Throughput Reduction After Decimation
â On-Chip RAM with 32 Preset Profiles
⢠LVDS Interface With a Speed Up to 1 Gbps
⢠5-Gbps JESD Interface:
â JESD204B Subclass 0, 1, and 2
â 2, 4, or 8 Channels per JESD Lane
⢠Small Package: 15-mm à 15-mm NFBGA-289
2 Applications
⢠Medical Ultrasound Imaging
⢠Nondestructive Evaluation Equipment
⢠Sonar Imaging Equipment
⢠Multichannel, High-Speed Data Acquisition
3 Description
The AFE58JD32 device is a highly-integrated, analog
front-end 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)
AFE58JD32
NFBGA (289)
15.00 mm à 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
INP
ATTEN
8 dB
to
0 dB
INM
LNA
20 dB to
51 dB
3rd-Order LPF with
5 MHz, 7.5 MHz,
10 MHz, and 12.5 MHz
10- or
12-Bit
ADC
Digital
Processing and
Demodulator
LVDS
or
JESD
TGC Control
Signals
DTGC Engine
Cross-Point
Switch
16-Phase
Generator
CW Clocks
CW Mixer
CW Current Outputs
Reference
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.
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