IDTF1912NCGI
Datasheet
6 Bit Digital Step Attenuator
1 MHz to 4000 MHz
GENERAL DESCRIPTION
FEATURES
Serial & 6 bit Parallel Interface
This document describes the specification for the IDT
F1912 Digital Step Attenuator. The F1912 is part of a
family of Glitch-FreeTM DSAs optimized for the
demanding requirements of Base Station (BTS) radio
cards and numerous other non-BTS applications.
These devices are offered in a compact 4mm x 4mm
20 pin QFN package with 50Ω impedances for ease of
integration.
31.5 dB Control Range
0.5 dB step
Glitch-FreeTM, low transient overshoot
3.0 V to 5.25 V supply
1.8 V or 3.3 V control logic
Attenuation Error < 0.22 dB @ 2 GHz
Low Insertion Loss < 1.6 dB @ 2 GHz
Ultra linear IIP3 >+59.5 dBm
IIP2 = +110 dBm typical
COMPETITIVE ADVANTAGE
Stable Integral Non-Linearity over temperature
Low Current Consumption 550 µA typical
-40 °C to +105 °C operating temperature
4mm x 4mm Thin QFN 20 pin package
Digital step attenuators are used in Receivers and
Transmitters to provide gain control. The F1912 is a
6-bit step attenuator optimized for these demanding
applications. The silicon design has very low insertion
loss and low distortion (> +60 dBm IIP3.) The device
has pinpoint accuracy. Most importantly, the F1912
includes IDT’s Glitch-FreeTM technology which results in
low overshoot & ringing during MSB transitions.
FUNCTIONAL BLOCK DIAGRAM
Glitch-FreeTM Technology so PA or ADC will not
TM
Glitch-FreeTM
be damaged during when transitions.
RF1
RF2
Extremely accurate with low distortion.
Lowest insertion loss for best SNR
APPLICATIONS
Bias
Decoder
SPI
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
VMODE
LE
D[5:0]
CLK DATA
Part# Details
Freq Range
IL
Resolution /
Range (dB)
Part#
Control
Pinout
(MHz)
(dB)
PE43702
PE43701
Parallel &
Serial
F1950 150 - 4000 0.25 / 31.75
1.3
ORDERING INFORMATION
F1951 100 - 4000
0.50 / 31.5 Serial Only 1.2
0.50 / 15.5 Serial Only 0.9
Parallel &
HMC305
HMC305
Omit IDT
prefix
Tape &
Reel
0.8 mm height
package
F1952 100 – 4000
PE4302
DAT-31R5
F1953 400 – 4000
0.50 / 31.5
0.25 / 31.75
0.50 / 31.5
1.3
1.4
1.4
Serial
Parallel &
Serial
PE43705,
RFSA3715
F1956
F1912
1 - 4000
IDTF1912NCGI8
Parallel &
Serial
PE4312
PE4302
1 – 4000
Green
RF product Line
Glitch-FreeTM, Digital Step Attenuator
1
Rev 1, May 2017