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KAT1108E 数据表(PDF) 1 Page - Integrated Device Technology

部件名 KAT1108E
功能描述  7-bit 0.25 dB Digital Step Attenuator
Download  17 Pages
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制造商  IDT [Integrated Device Technology]
网页  http://www.idt.com
标志 IDT - Integrated Device Technology

KAT1108E 数据表(HTML) 1 Page - Integrated Device Technology

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7-bit 0.25 dB Digital Step Attenuator
150 MHz to 4000 MHz
Glitch-Free
TM Digital Step Attenuator
1
Rev1 March 2012
IDTF1950
DATASHEET
GENERAL DESCRIPTION
This document describes the specification for the
IDTF1950 Digital Step Attenuator. The F1950 is part of a
family of
Glitch-Free
TM DSAs optimized for the demanding
requirements of communications Infrastructure. These
devices are offered in a compact 4x4 QFN package with
50
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 IDTF1950 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 nsec. Most importantly, the F1950 includes
IDT’s
G
Glliittc
ch
h--F
Frre
ee
eT
TM
M 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)
L
Lo
ow
we
esstt iin
nsse
errttiio
on
n llo
ossss ffo
orr b
be
esstt S
SN
NR
R
G
Glliittcch
h--F
Frre
ee
eT
TM
M w
wh
he
en
n ttrra
an
nssiittiio
on
niin
ng
g
w
wo
on
ntt d
da
am
ma
ag
ge
e P
PA
A o
orr A
AD
DC
C
E
Ex
xttrre
em
me
elly
y a
accccu
urra
atte
e w
wiitth
h llo
ow
w d
diisstto
orrttiio
on
n
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
F
F1
19
95
50
0
1
15
50
0 -- 4
40
00
00
0
0
0..2
25
5 // 3
31
1..7
75
5
P
Pa
arra
alllle
ell &
&
S
Se
erriia
all
--1
1..3
3
P
PE
E
F1951
100 - 4000
0.50 / 31.5
Serial Only
-1.2
HITT
F1952
100 – 4000
0.50 / 15.5
Serial Only
-0.9
HITT
FEATURES
Glitch-Free
TM, < 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 nsec
Class 2 JEDEC ESD (> 2kV HBM)
Serial & Parallel Interface 31.75 dB Range
4x4 mm Thin QFN 24 pin package
DEVICE BLOCK DIAGRAM
ORDERING INFORMATION
RF1
Bias
VDD
VMODE
DEC
D[6:0]
7
CLK
SPI
LE
DATA
RF2
IDTF1950NBGI8
0.8 mm height
package
Green
Industrial
Temp range
Tape &
Reel
Omit IDT
prefix
RF product Line
Glitch-Free
TM
Glitch-Free
TM


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