FX332A Sample & Hold

The FX332A is a differential, dual rank, Sample & Hold Amplifier (S&HA) that tracks to 30GHz signals. It is optimized for low-noise, sub-sampling 20M-900MS/s and low-power dissipation. The FX332A is targeted at wideband, sub-sampled data acquisition/instrumentation applications where ultra-low noise level, low power-consumption, and very small form factor are required.

The FX332A is based on the popular FX331C with two changes: the BWA pin is replaced with a Power Down (PD) pin and the hold capacitors are very linear. The result is low distortion operation under all conditions and the ability to save power in power down mode.

Key Features

• Single clock/dual rank architecture
• 2.9mm ceramic/air-cavity QFN16 package
• Single -5V Vee supply
• 550mW power dissipation
• High-isolation
• Power Down (PD) pin
• Linear hold capacitors

Applications

• Sub-sampling: digital sampling oscilloscopes, jitter test
• High-speed digital communications systems
• RF Automated Test Equipment (ATE)
• Bandwidth & linearity extension of ADCs
• Hand-held test & measurement

Due to the compact size and low power, the FX332A can extend the bandwidth/linearity of systems that employ commercial ADCs.

​Specifications

• 30GHz input tracking bandwidth, 300mVppd
• Min-Max sampling rate: 20MS/s to 900MS/s
• 62dBc SFDR @ Fin=1GHz, 500mVp-p, 200MS/s
• 44dBc SFDR @ Fin=10GHz, 500mVp-p, 200MS/s
• >55dB feed-through rejection in hold mode
• AC/DC-coupled differential IO
• Low power dissipation, 550mW
• ​Single -5V supply
• ​1mV 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