FX331A Sample & Hold
Availability of the FX331A is limited and primarily for current customers. New customers are encouraged to consider the FX331C, which is fully pin/function compatible and has lower input referred noise.
The FX331A is a high-performance, differential, dual rank, Sample & Hold Amplifier (S&HA), optimized for low power dissipation, and targeted at wide-band, sub-sampled data-acquisition/instrumentation applications. The FX331A employs a novel circuit architecture implemented in advanced SiGe BiCMOS. It is the smallest, lowest power, and simplest to use high-bandwidth S&HA available commercially. Tracking input-referred noise is 1.6mVrms. The FX331A tracks DC to 30GHz analog signals and performs high-fidelity sampling from 50M to 950MS/s. 

Key Features

  • Single clock/dual rank architecture
  • 2.9mm ceramic/air-cavity QFN16 package
  • Single -5V Vee supply
  • 485mW power dissipation
  • Analog Bandwidth Adjust (BWA) allowing 24-30GHz band-limiting
  • High-isolation

Applications

  • Bench, handheld, and Automated Test Equipment (ATE) instruments such as DSOs and TDRs
  • Sub-sampled test and signal processing equipment
  • Receivers
  • Wide-band sampled-systems where low-power, low noise, superior linearity and broadband frequency is required, such as 100G Ethernet NRZ and PAM4 eye-test
  • Digital sampling scopes
  • High-speed digital communications ATE
  • RF Automated Test Equipment (ATE)
  • Extending/cleaning high-speed DAC

Due to the compact size and low power, the FX331A can extend the bandwidth/linearity of systems that employ commercial ADCs.

​Specifications

  • 30GHz input bandwidth, 1.0 Vp-p, full scale
  • Min-Max sampling rate: 50MS/s to 950MS/s
  • 64dBc SFDR @ Fin=1GHz, 500mVp-p, 200MS/s
  • 46dBc SFDR @ Fin=10GHz, 500mVp-p, 200MS/s
  • >60dB feed-through rejection in hold mode
  • AC/DC-coupled differential IO
  • Low power dissipation, 485mW
  • Analog input bandwidth adjustable: 24-30GHz
  • Single -5V supply
  • ​< 1.6mV rms input referred noise
  • 2.9x2.9mm QFN16 package
  • On-Chip bandgap and current references

Qualifications

  • No Latch-Up per JESD78D
  • Achieved CDM (JESD22-C101D) Class III per ESD STM5.3.1-2009
  • Achieved HBM (JESD22-A114) Class 1B per ESD STM5.1-2007

Shipping now in 2.9mm QFN16 Package
Data Sheet and High Speed Evaluation Board Available, please visit our Contact page for more information

Press Release

FMAX Technologies Delivers 32GHz Sample-and-Hold IC Using Silvaco's Custom Design Flow

SANTA CLARA, CA--(Marketwired - Sep 10, 2014) - FMAX Technologies, a provider of mixed-signal integrated circuit (IC) solutions, recently developed and tested a 32GHz bandwidth sample-and-hold integrated circuit FX331A, using Silvaco's custom design flow. Designed for use in sub-sampled digital oscilloscopes, the IC is targeted at 25Gb/s test instrumentation for...
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