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F1956

7-bit 0.25dB Glitch-Free Wideband Digital Step Attenuator

Datasheet

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  • Serial and 7-bit parallel interface
  • 31.75dB range
  • 0.25dB steps
  • Glitch-Free™: < 2dB transient ringing
  • 500ns settling time
  • Ultra linear +64dBm IP3
  • Low insertion loss < 1.3dB at 4GHz
  • Attenuation error < 0.6dB at 4GHz
  • 3.3V or 5V Supply
  • 1.8V or 3.3V control logic
  • -40 °C to +105 °C operating temperature
  • 5mm x 5mm, 32-pin TQFN package

The F1956 Glitch-Free™ Digital Step Attenuator (DSA) offers very high reliability due to its monolithic silicon die construction in a compact 5mm x 5mm 32-pin TQFN package. It has very low insertion loss with minimal distortion and is designed with a 50Ω input and output impedance. Additionally, the device is designed to have high accuracy which improves SNR and/or ACLR by ensuring the system gain is achieved as close to targeted as possible.

Design & Development (Boards and Kit)

Board Image

Evaluation Board for F1956 7-bit Digital Step Attenuator

The F1956EVBI is a fully populated evaluation board which allows the customer to easily evaluate the F1956 digital step attenuator. Attenuation may be set using either the F1956’s parallel control input or its serial control input. A dip switch on the evaluation board allows one to set the attenuation state without off-board connections to the control inputs.

The F1956EVS is a complete hardware and software solution that allows customers to digitally control the F1956EVBI with the USB output on a computer.  The kit includes the F1956EVBI board, as well as a USB Digital Control Board and interface cables. The software, guides , and instructional videos are available for download/viewing on this page.

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Part Numbers

F1956NBGI

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F1956NBGI8

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