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Renesas Electronics Components Datasheet

IDTF1956NBGI8 Datasheet

Digital Step Attenuator

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F1956
Datasheet
7-Bit 0.25 dB Wideband Digital Step Attenuator
1 to 6000 MHz
GENERAL DESCRIPTION
This document describes the specification for the
F1956 Digital Step Attenuator. The F1956 is part of
IDT’s 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 mm x 5 mm 32-pin
package with 50 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 2 dB of ringing across the attenuation range in
stark contrast to competing DSAs that glitch as much
as 10 dB during MSB state changes.
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 2000 V HBM ESD
ORDERING INFORMATION
Tape &
Reel
F1956NBGI8
Green
FEATURES
Serial & 7-bit Parallel Interface
31.75 dB Range
0.25 dB steps
Glitch-FreeTM: low transient overshoot
500 ns settling time
Ultra linear > 64 dBm IIP3
Low Insertion Loss < 1.7 dB @ 4 GHz
Attenuation error < ±0.2 dB @ 4 GHz
Bi-directional RF use
3.3 V or 5 V Supply
1.8 V or 3.3 V control logic
Low Current Consumption: 350 μA typical
-40 °C to +105 °C operating temperature
5 mm x 5 mm Thin QFN 32 pin package
FUNCTIONAL BLOCK DIAGRAM
RF1
Glitch-FreeTTMM
RF2
Bias
Decoder
SPI
VMODE
D[6:0] A[2:0]
CLK DATA LE
Part# Details
Part#
Freq Range
(MHz)
Resolution /
Range (dB)
Control
IL
(dB)
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
F1956
1 - 4000
0.25 / 31.75
Parallel &
Serial
1.4
PE43705,
PE43712,
RFSA3715
F1912 1 4000
0.50 / 31.5
Parallel &
Serial
1.6
PE4312
PE4302
F1956, Rev 2 04/08/2016


Renesas Electronics Components Datasheet

IDTF1956NBGI8 Datasheet

Digital Step Attenuator

No Preview Available !

F1956
ABSOLUTE MAXIMUM RATINGS
Parameter
VDD to GND
D[6:0], DATA, CLK, LE, A0, A1, A2, VMODE
RF1, RF2
Maximum Input Power applied
to RF1 or RF2 (>100 MHz)
Operating Case Temperature
Continuous Power Dissipation
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (soldering, 10s)
Electrostatic Discharge HBM
(JEDEC/ESDA JS-001-2012)
ESD Voltage CDM (Per JESD22-C101F)
Symbol
VDD
VCNTL
VRF
PRF
TJmax
TST
TLEAD
VESDHBM
VESDCDM
Min
-0.3
-0.3
-0.3
-65
Max
+5.5
Min (VDD +
0.3, 3.9)
+0.3
+34
105
1.5
+150
+150
+260
1500
(Class 1C)
500
(Class C2)
Units
V
V
V
dBm
°C
W
°C
°C
°C
V
V
Stresses above those listed above may cause permanent damage to the device. Functional operation of the device at
these or any other conditions above those indicated in the operational section of this specification is not implied.
Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ESD CAUTION
This product features proprietary protection circuitry. However, it may be damaged if subjected to high energy ESD.
Please use proper ESD precautions when handling to avoid damage or loss of performance.
PACKAGE THERMAL AND MOISTURE CHARACTERISTICS
θJA (Junction Ambient)
θJC (Junction Case) [The Case is defined as the exposed paddle]
Moisture Sensitivity Rating (Per J-STD-020)
40 °C/W
4 °C/W
MSL1
7-Bit 0.25 dB Wideband Digital Step Attenuator


Part Number IDTF1956NBGI8
Description Digital Step Attenuator
Maker Renesas
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