1 Features

1• 32-Channel AFE for Ultrasound Applications:

– LNA, Attenuator, LPF, ADC, CW Mixer, and

Digital I/Q Demodulator

– Digital Time Gain Compensation (DTGC)

– Total Gain Range: 0 dB to 48 dB

• Low-Noise Amplifier (LNA) With Programmable

Gain:

– Low Current Noise of 1pA/rtHz

– Gain: 21 dB, 18 dB, and 15 dB

– Linear Input Range: up to 700 mVPP

• Programmable Attenuator (ATTEN):

– Attenuation Range (Steps of 0.125 dB):

0 to 36 dB

– Digital TGC Engine

• Programmable Gain Amplifier (PGA):

– Gain: 21 dB, 24 dB, and 27 dB

• Third-Order, Linear-Phase, Low-Pass Filter (LPF):

– Cut-off Frequency From 10 MHz to 25 MHz

• 16 ADCs Converting at 12-Bit, 80 MSPS or 10-Bit,

100 MSPS:

– Each ADC Converts Two Sets of Inputs at Half

Rate

– 12-Bit Mode: 72-dBFS SNR

– 10-Bit Mode: 61-dBFS SNR

• TGC Mode Power w/o digital I/Q Demodulator:

– Lowest Power of 18.5 mW/Ch in Low Power

Mode, 4 nV/rtHz, 10-Bit, 20 MSPS, LVDS (2x

rate)

– 27.8 mW/Ch at 3 nV/rtHz in Low Noise Mode

at 12-Bit, 40 MSPS

– 24.4 mW/Ch at 4 nV/rtHz in Low Power Mode

at 12-Bit, 40 MSPS

• Excellent Device-to-Device Gain Matching:

– ±0.5 dB (Typical)

• Harmonic Distortion: –55 dBc level

• Fast and Consistent Overload Recovery

• Continuous Wave (CW) Path With:

– Low Close-In Phase Noise of –148 dBc/Hz at

1-kHz Frequency Offset off 5-MHz Carrier

– Power Consumption w/o Signal: 10 mW/Ch

– Phase Resolution: λ/16

– 12-dB Suppression on Third and Fifth

Harmonics

• Digital I/Q demodulator:

– Decimation Filter M = 1 to 63

– Data Throughput Reduction After Decimation

– On-Chip RAM with 32 Preset Profiles

• 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

• In-Probe Electronics

3 Description

The AFE58JD32LP is a highly integrated, analog

front-end (AFE) solution specifically designed for

portable ultrasound systems where high performance,

low power, and small size are required.