آر اف (فرکانس رادیویی) و بی‌سیم تضعیف‌کننده‌

Product Attributes

Introduction

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×5 mm 32 pin QFN package with 75 Ω impedances for ease of integration. 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 IDT’s Glitch-FreeTM technology which results in low overshoot & ringing during MSB transitions.

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
• Stable Attenuator Accuracy over temperature
• Bi-directional RF use
• 3.00 V to 5.25 V supply
• 1.8 or 3.3 control logic
• Low Current Consumption: 325 μA typical
• -40 °C to +105 °C operating temperature
• 5 mm×5 mm Thin QFN 32 pin package

Applications

• CATV Infrastructure
• CATV Set-Top Boxes
• CATV Satellite Modems
• Data Network Equipment
• Fiber Networks