6-bit Digital Step Attenuator

400 to 4000 MHz

F1953

Datasheet

© 2022 Renesas Electronics Corporation

1

February 9, 2022

DESCRIPTION

This document describes the specification for the F1953

Digital Step Attenuator. The F1953 is part of a family of

Glitch-FreeTM DSAs optimized for the demanding

requirements of communications Infrastructure. These

devices are offered in a compact 4 x 4 mm QFN package

with 50Ω impedances for ease of integration.

COMPETITIVE ADVANTAGE

Digital step attenuators are used in Receivers and

Transmitters to provide gain control. The F1953 is a 6-bit

step attenuator optimized for these demanding

applications. The silicon design has very low insertion

loss and low distortion (> +60dBm IP3I.) The device has

pinpoint accuracy and settles to final attenuation value

within 400ns. Most importantly, the F1953 includes

Renesas’ Glitch-FreeTM technology which results in less

than 0.5dB of overshoot ringing during MSB transitions.

This is in stark contrast to competing DSAs that glitch as

much as 10dB.

 Lowest insertion loss for best SNR

 Glitch-FreeTM when transitioning – won’t

damage PA or ADC

 Extremely accurate with low distortion

APPLICATIONS

•

Base Station 2G, 3G, 4G, TDD radio-cards

•

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 - 4000

0.25 / 31.75

Parallel &

Serial

-1.3

PE43702

PE43701

F1951

100 - 4000

0.50 / 31.5

Serial Only

-1.2

HMC305

F1952

100 – 4000

0.50 / 15.5

Serial Only

-0.9

HMC305

F1953

400 - 4000

0.50 / 31.5

Parallel &

Serial

-1.3

PE4302

DAT-31R5

FEATURES

•

Glitch-FreeTM, < 0.6dB transient overshoot

•

Spurious Free Design

•

2.7 to 3.6 V supply

•

Attenuation Error < 0.5dB at 2GHz

•

Low Insertion Loss < 1.4dB at 2GHz

•

Excellent Linearity >+60dBm IP3I

•

Fast settling time, < 400ns

•

Serial or Parallel Interface 31.5dB Range

•

Stable Integral Non-Linearity over temperature

•

Low Power Consumption < 200µA

•

Integrated DC blocking capacitors

•

Drop-In replacement

•

4 x 4 mm thin 20-VFQFPN package

DEVICE BLOCK DIAGRAM

ORDERING INFORMATION

RF1

Bias

VDD

VMODE

DEC

D[5:0]

6

CLK

SPI

LE

DATA

RF2

F1953NCGI8

0.8 mm height

package

Green

Industrial

Temp range

Tape &

Reel

RF product Line

Glitch-FreeTM

Glitch-FreeTM