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F1956

Renesas
Part Number F1956
Manufacturer Renesas
Description Digital Step Attenuator
Published Dec 28, 2020
Detailed Description F1956 Datasheet 7-Bit 0.25dB Wideband Digital Step Attenuator 1 to 6000 MHz DESCRIPTION This document describes the s...
Datasheet PDF File F1956 PDF File

F1956
F1956

Overview
F1956 Datasheet 7-Bit 0.
25dB Wideband Digital Step Attenuator 1 to 6000 MHz DESCRIPTION This document describes the specification for the F1956 Digital Step Attenuator.
The F1956 is part of Renesas’ Glitch-FreeTM family of DSAs optimized for the demanding requirements of Base Station (BTS) radio cards and numerous other non-BTS applications.
This device is offered in compact 5 × 5 mm 32-pin package with 50Ω input and output impedance for ease of integration into the radio or RF system.
COMPETITIVE ADVANTAGE The F1956 offers very high reliability due to its construction from a monolithic silicon die in a QFN package.
The insertion loss is very low with minimal distortion.
Additionally, the device is designed to have extremely accurate attenuations levels.
These accurate attenuation level improves system SNR and/or ACLR by ensuring system gain is as close to targeted level as possible.
Also, the very fast settling time in parallel mode is ideal for fast switching systems.
Finally, the device is Glitch-FreeTM with less than 2dB of ringing across the attenuation range in stark contrast to competing DSAs that glitch as much as 10dB during MSB state changes.
FEATURES • Serial and 7-bit Parallel Interface • 31.
75dB Range • 0.
25dB steps • Glitch-FreeTM: low transient overshoot • 500ns settling time • Ultra linear > 64dBm IIP3 • Low Insertion Loss < 1.
7dB at 4GHz • Attenuation error < ±0.
2dB at 4GHz • Bi-directional RF use • 3.
3V or 5V Supply • 1.
8V or 3.
3V control logic • Low Current Consumption: 350μA typical • -40°C to +105°C operating temperature • 5 × 5 mm thin 32-QFN package FUNCTIONAL BLOCK DIAGRAM RF1 RF2  Lowest insertion loss for best SNR  Glitch-FreeTM technology to protect PA or ADC during transitions between attenuation states.
 Extremely accurate attenuation levels  Ultra-low distortion  MSL1 and 2000V HBM ESD ORDERING INFORMATION Tape & Reel F1956NBGI8 Green Bias Decoder SPI VMODE D[6:0] A[2:0] CLK DATA LE Part# Details Part# Freq Range (M...


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