F1977 Datasheet | IDT

DESCRIPTION This document describes the specification for the F1977 Digital Step Attenuator. The F1977 is part of a family of Glitch-Free TM DSAs optimized for the demanding requirements of CATV and Satellite systems. These devices are offered in a pact 5 mm x 5 mm 32 pin QFN package with 75 Ω impedances for ease of integration. PETITIVE 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 d Bm IIP3) and pinpoint attenuation accuracy. Most importantly, the F1977 includes IDT’s Glitch-Free TM technology which results in low overshoot & ringing during MSB transitions. Lowest insertion loss for best SNR Extremely accurate attenuation levels. Ultra low distortion. Glitch-Free TM 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 d B Control Range - 0.25 d B step - Glitch-Free TM for low transient overshoot - Low Insertion Loss: 1.4 d B @ 1 GHz - Ultra linear IIP3: +64 d Bm - Attenuation Error: -0.1 d B @ 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-FFrree TTMM F1977, Rev 1, 04/21/2016 © 2016 Integrated Device Technology, Inc. ABSOLUTE MAXIMUM...