1 Features

• 32-Channel, AFE for Ultrasound Applications:
  • Input Attenuator, LNA, LPF, ADC,
    and CW Mixer
  • Digital Time Gain Compensation (DTGC)
  • Total Gain Range: 12 dB to 51 dB
  • Linear Input Range: 800 mV_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:
  • 20-dB to 51-dB Gain With 0.125-dB Step
  • Low Input Current Noise: 1.2 pA/√Hz
• 3rd-Order, Linear-Phase, Low-Pass Filter (LPF):
  • 5 MHz, 7.5 MHz, 10 MHz, and 12.5 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 ADC: 72-dBFS SNR
  • 10-Bit ADC: 61-dBFS SNR
• Optimized for Noise and Power:
  • 35 mW/Ch at 2.1 nV/√Hz, 40 MSPS
  • 42 mW/Ch at 1.4 nV/√Hz, 40 MSPS
  • 52 mW/Ch at 1.3 nV/√Hz, 40 MSPS
  • 60 mW/Ch in CW Mode
• Excellent Device-to-Device Gain Matching:
  • ±0.5 dB (Typical)
• Low Harmonic Distortion: –55 dBc
• Fast and Consistent Overload Recovery
• Continuous Wave (CW) Path With:
  • Low Close-In Phase Noise of –151 dBc/Hz
    at 1-kHz Frequency Offset Off 2.5-MHz Carrier
  • Phase Resolution: λ / 16
  • Supports 16X CW Clock
  • 12-dB Suppression on Third and Fifth Harmonics
• LVDS Interface With a Speed Up to 1 Gbps
• Small Package: 15-mm × 15-mm NFBGA-289