1 Features

• 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 mV_PP
• 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