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F1977

7-bit 0.25dB, 75Ω, Glitch-Free Digital Step Attenuator

Datasheet

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  • 5MHz to 3000MHz frequency range
  • Glitch-Free™ low transient overshoot
  • Low insertion loss < 1.4dB at 1GHz
  • Excellent linearity +64dBm IIP3
  • Attenuation step error 0.1dB at 1GHz
  • Serial and Parallel interface 31.75dB range
  • Low spurious design
  • 3V/5V supply, 1.8V/3.3V control logic
  • Fast settling time
  • Class 1C JEDEC ESD (1.5kV HBM)
  • 5mm x 5mm 32-VFQFPN package

The F1977 digital step attenuator featuring Glitch-Free™ technology improves system reliability and settling time. It has an attenuation range of 31.75dB with excellent accuracy and very low distortion and insertion loss.

  • CATV infrastructure
  • CATV set-top boxes
  • CATV satellite modems
  • Data network equipment
  • Fiber networks

Design & Development (Boards and Kit)

Board Image

Evaluation Board for F1977, 7-bit, 75Ω, Digital Step Attenuator

The F1977EVBI is a fully populated evaluation board which allows the customer to easily evaluate the device. Attenuation may be set using either the parallel control input or its serial control input (through external connection and control). A dip switch on the evaluation board allows one to set the attenuation state without off-board connections to the control inputs.

The F1977EVS is a complete hardware and software solution that allows customers to digitally control the device with the USB output on a computer.  The kit includes the F1977EVBI board, as well as a USB Digital Control Board and interface cables. The software, guides, and instructional videos are available for download/viewing on the product web page.

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Part Numbers

F1977NBGI

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F1977NBGI8

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