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F1977 Datasheet, PDF (1/21 Pages) Integrated Device Technology – Digital Step Attenuator | |||
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7-Bit, 75 â¦, Digital Step Attenuator
GENERAL DESCRIPTION
This document describes the specification for the
F1977 Digital Step Attenuator. The F1977 is part of a
family of Glitch-FreeTM DSAs optimized for the
demanding requirements of CATV and Satellite
systems. These devices are offered in a compact
5 mm x 5 mm 32 pin QFN package with 75 â¦
impedances for ease of integration.
COMPETITIVE ADVANTAGE
Digital step attenuators are used in Receivers and
Transmitters to provide gain control. The F1977 is a
7-bit step attenuator optimized for these demanding
applications. The silicon design has very low insertion
loss, low distortion (+64 dBm IIP3) and pinpoint
attenuation accuracy. Most importantly, the F1977
includes IDTâs Glitch-FreeTM technology which results in
low overshoot & ringing during MSB transitions.
Lowest insertion loss for best SNR
Extremely accurate attenuation levels.
Ultra low distortion.
Glitch-FreeTM technology to protect PA or ADC
during transitions between attenuation states.
APPLICATIONS
⢠CATV Infrastructure
⢠CATV Set-Top Boxes
⢠CATV Satellite Modems
⢠Data Network Equipment
⢠Fiber Networks
Ordering Information
Tape &
Reel
F1977NBGI8
Green
F1977
Datasheet
5 to 3000 MHz
FEATURES
⢠Serial & 7 bit Parallel Interface
⢠31.75 dB Control Range
⢠0.25 dB step
⢠Glitch-FreeTM for low transient overshoot
⢠Low Insertion Loss: 1.4 dB @ 1 GHz
⢠Ultra linear IIP3: +64 dBm
⢠Attenuation Error: -0.1 dB @ 1 GHz
⢠Stable Attenuator Accuracy over temperature
⢠Bi-directional RF use
⢠3.00 V to 5.25 V supply
⢠1.8 V or 3.3 V control logic
⢠Low Current Consumption: 325 µA typical
⢠-40 °C to +105 °C operating temperature
⢠5 mm x 5 mm Thin QFN 32 pin package
FUNCTIONAL BLOCK DIAGRAM
Gllitch-FFrreeTTMM
F1977, Rev 1, 04/21/2016
1
© 2016 Integrated Device Technology, Inc.
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