F1977 Image


RF Variable Attenuator by Renesas

Note : Your request will be directed to Renesas.

The F1977 from IDT is a 7-bit digital step attenuator that operates from 5 MHz to 3000 MHz. It has an attenuation range of 31.75 dB with a resolution of 0.25 dB and a low insertion loss of 1.4 dB.The attenuator has low distortion (IIP3 of 64 dBm) and extremely accurate attenuation levels. The Glitch-Free technology protects PA or ADC during transitions between attenuation states and results in low overshoot & ringing during MSB transitions. This digital attenuator provides gain control in a wide range of applications including CMTS, fiber distribution networks, HFC distribution nodes, and CATV infrastructure and data network equipment. It also supports the increased data rate requirement of the DOCSIS 3.1 standard.The F1977 is available in a compact 5x5 mm Thin QFN 32 pin package.

Product Specifications

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Product Details

  • Part Number
  • Manufacturer
  • Description
    7-Bit Glitch Free Digital Step Attenuator from 5 MHz to 3 GHz

General Parameters

  • Type
    Programmable, Digital
  • Frequency
    5 to 3000 MHz
  • Bits
    7 Bit
  • Channels
    1 Channel
  • Attenuation Range
    31.75 dB
  • Attenuation Step
    0.25 dB
  • Power
    0.015 to 0.63 W
  • P1dB
    32 dBm
  • IIP3
    64 dBm
  • Insertion Loss
    1.4 to 2.2 dB
  • Supply Voltage
    3 to 5.25 V
  • Interface
  • Impedance
    75 Ohms
  • Input Return Loss
    15 to 18 dB
  • Output Return Loss
    15 to 17 dB
  • Package Type
    Surface Mount
  • Package
    QFN 32 Pin
  • Dimension
    5 mm x 5 mm
  • Operating Temperature
    -40 to 105 Degree C
  • Grade
    Commercial, Military

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