F1975 Datasheet, PDF (1/22 Pages) Integrated Device Technology – Digital Step Attenuator

6-Bit, 75 Ω, Digital Step Attenuator
General Description
This document describes the specification for the IDT
F1975 Digital Step Attenuator. The F1975 is part of a
family of Glitch-Free^TM DSAs optimized for the
demanding requirements of CATV and Satellite
systems. This device is offered in a compact
4 mm x 4 mm 20 pin Thin QFN package with 75 Ω
impedance for ease of integration.
COMPETITIVE ADVANTAGE
Digital step attenuators are used in Receivers and
Transmitters to provide gain control. The F1975 is a
6-bit step attenuator optimized for these demanding
applications. The silicon design has very low insertion
loss and low distortion (+64 dBm IIP3). The device
has pinpoint attenuation accuracy. Most importantly,
the F1975 includes IDT’s Glitch-Free^TM technology
which results in low overshoot & ringing during MSB
transitions.
Glitch-Free^TM Technology protects PA or ADC
from damage during transitions between
attenuation states.
Extremely accurate attenuation levels
Ultra low distortion
Lowest insertion loss for best SNR
APPLICATIONS
• CATV Infrastructure
• CATV Set-Top Boxes
• CATV Satellite Modems
• Data Network Equipment
• Fiber Networks
ORDERING INFORMATION
Tape &
Reel
F1975NCGI8
Green
F1975
Datasheet
5 to 3000 MHz
FEATURES
• Serial & 6-Bit Parallel Interface
• 31.5 dB Control Range
• 0.5 dB step
• Glitch-Free^TM, low transient overshoot
• 3.0 V to 5.25 V supply
• 1.8 V or 3.3 V control logic
• Attenuator Step Error: 0.1 dB @ 1 GHz
• Low Insertion Loss: 1.2 dB @ 1 GHz
• Ultra linear IIP3: +64 dBm
• IIP2: +125 dBm typical
• Stable Integral Non-Linearity over temperature
• Low Current Consumption: 550 µA typical
• Bi-Directional
• -40 °C to +105 °C Operating Temperature
• 4 mm x 4 mm Thin QFN 20 pin package
FUNCTIONAL BLOCK DIAGRAM
F1975, Rev O 01/15/2016
1
© 2016 Integrated Device Technology, Inc.