DIFF-In/SE-Out Quad Path TX
DVGA 400MHz to 1100MHz
F4481
Datasheet
© 2020 Renesas Electronics Corporation
1
December 15, 2020
Description
The F4481 is a 400MHz to 1100MHz Quad Path TX DVGA outfitted
with 100Ω differential inputs and 50Ω single-ended outputs. The
device is part of a complete fami ly of VGAs targeting FDD and T DD
applications within the 400MHz to 4200MHz frequency range.
Using a single 3.3V power supply and only 520mA of ICC, the
F4481 provides four independent transmit paths, each with 28dB
maximum gain, +40dBm OIP3, +16dBm output P1dB, and 5.5dB
NF at 900MHz under typical conditions. Each channel includes a
glitch-free digital step attenuator that re duces gain by up to 31.5 d B
in precise 0.5dB steps.
The F4481 is packaged in an 8 × 8 mm 56-LGA, with matched
100Ω differential input and 50Ω single-ended output impedances
for ease of integration into the signal path.
Competitive Advantage
Combines four independent TX channels consisting of an
LPF, LNA, DSA, and Driver in a compact 8 × 8 mm LGA
package
Low DC power
High linearity
High reliability
Uses Renesas’ patented Zero-Distortion
TM
and Glitch-Free
TM
technologies, providing superior performance and PA
damage protection over the entire RF gain range
Typical Applications
4G and 5G multi-mode, multi-carrier transmitters
LTE and UMTS/WCDMA base stations
Active antenna systems
Digital radio
Features
Independent quad channels for FDD TX applications
RF range: 400MHz to 1100MHz
• F4482: 1300MHz to 2800MHz
28dB typical max gain at 900MHz
Precise SPI-controlled Glitch-Free
TM
gain adjustment
• 31.5dB gain range with 0.5dB step size
5.5dB NF at 900MHz
+40dBm OIP3 at 900MHz
+16dBm output P1dB at 900MHz
3.3V supply voltage
I
CC
= 520mA
100Ω differential input impedances
50Ω single-ended output impedances
1.8V and 3.3V logic support
Independent Channel Standby modes for power savings
Operating temperature (T
EP
) range: -40°C to +105°C
8 × 8 mm, 56-LGA package
Block Diagram
Figure 1. Block Diagram
F4481
Datasheet
© 2020 Renesas Electronics Corporation
2
December 15, 2020
Contents
Pin Assignments ....................................................................................................................................................................................................5
Pin Descriptions .....................................................................................................................................................................................................6
Absolute Maximum Ratings ...................................................................................................................................................................................8
Recommended Operating Conditions ...................................................................................................................................................................9
Electrical Characteristics .....................................................................................................................................................................................10
Thermal Characteristics .......................................................................................................................................................................................21
Typical Operating Conditions (TOC) ...................................................................................................................................................................21
Typical Performance Characteristics ...................................................................................................................................................................22
Programming .......................................................................................................................................................................................................33
Serial Programming ....................................................................................................................................................................................33
Device Register Maps .......................................................................................................................................................................33
Serial Mode Default Condition ...........................................................................................................................................................34
SPI Timing Intervals ..........................................................................................................................................................................35
Standby Mode Programming ......................................................................................................................................................................36
Control Pin Interface ...................................................................................................................................................................................37
Evaluation Kit Images ..........................................................................................................................................................................................38
Evaluation Kit / Applications Circuit .....................................................................................................................................................................39
Evaluation Kit Operation ......................................................................................................................................................................................41
Power Supplies ...........................................................................................................................................................................................41
Power Supply Setup ...................................................................................................................................................................................41
Power-On Procedure ..................................................................................................................................................................................41
Power-Off Procedure ..................................................................................................................................................................................41
Startup Condition ........................................................................................................................................................................................41
Default Channel Power On .........................................................................................................................................................................41
Chip Select (CSb) .......................................................................................................................................................................................41
Standby Mode (STBY) ................................................................................................................................................................................41
Package Outline Drawings ..................................................................................................................................................................................42
Ordering Information ............................................................................................................................................................................................42
Marking Diagram .................................................................................................................................................................................................42
Revision History ...................................................................................................................................................................................................42
List of Figures
Figure 1. Block Diagram .....................................................................................................................................................................................1
Figure 2. Pin Assignments for 8.0 × 8.0 × 0.65 mm 56-LG A P acka ge – Top V iew ............................................................................................5
Figure 3. Gain vs DSA Setting ..........................................................................................................................................................................22
Figure 4. Gain vs Attenuation ...........................................................................................................................................................................22
Figure 5. Gain at DSA = 0dB ............................................................................................................................................................................22
Figure 6. Gain at DSA = 14dB .........................................................................................................................................................................22