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F1950NBGI8 Datasheet(PDF) 1 Page - Renesas Technology Corp |
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F1950NBGI8 Datasheet(HTML) 1 Page - Renesas Technology Corp |
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1 / 19 page  Glitch-Free Digital Step Attenuator 1 Jul 12, 2021 DESCRIPTION This document describes the specification for the F1950 Digital Step Attenuator. The F1950 is part of a family of Glitch-Free DSAs optimized for the demanding requirements of communications Infrastructure. These devices are offered in a compact 4x4 QFN package with 50Ω impedances for ease of integration into the radio system. COMPETITIVE ADVANTAGE Digital step attenuators are used in Receivers and Transmitters to provide gain control. The F1950 is a 7- bit step attenuator optimized for these demanding applications. The silicon design has very low insertion loss and low distortion (+65 dBm IP3I). The device has pinpoint accuracy and settles to final attenuation value within 400 ns. Most importantly, the F1950 includes Renesas’ Glitch-Free technology which results in less than 0.6 dB of overshoot ringing during MSB transitions. This is in stark contrast to competing DSAs that glitch as much as 10 dB during MSB transitions (see p.10). Lowest insertion loss for best SNR Glitch-Free when transitioning – won’t damage PA or ADC Extremely accurate with low distortion APPLICATIONS Base Station 2G, 3G, 4G, TDD radiocards Repeaters and E911 systems Digital Pre-Distortion Point to Point Infrastructure Public Safety Infrastructure WIMAX Receivers and Transmitters Military Systems, JTRS radios RFID handheld and portable readers Cable Infrastructure PART# MATRIX Part# Freq range Resolution / Range Control IL Pinout F1950 150 - 5000 0.25 / 31.75 Parallel & Serial -1.3 PE F1951 100 - 5000 0.50 / 31.5 Serial Only -1.2 HITT F1952 100 – 4000 0.50 / 15.5 Serial Only -0.9 HITT FEATURES Glitch-Free, < 0.6 dB transient overshoot Spurious Free Design 3V to 5V supply Attenuation Error < 0.3 dB @ 2 GHz Low Insertion Loss < 1.3 dB @ 2 GHz Excellent Linearity +65 dBm IP3I Fast settling time, < 400 ns Class 2 JEDEC ESD (> 2kV HBM) Serial & Parallel Interface 31.75 dB Range 4 x 4 mm Thin QFN 24 pin package BLOCK DIAGRAM ORDERING INFORMATION RF1 Bias VDD VMODE DEC D[6:0] 7 CLK SPI LE DATA RF2 F1950NBGI8 0.8 mm height package Green Industrial Temp range Tape & Reel RF product Line Glitch-FreeTM Glitch-FreeTM |
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