Overview
Description
The F4481 is a 400MHz to 1100MHz quad path TX Digital Variable Gain Amplifier (DVGA) outfitted with 100Ω differential inputs and 50Ω single-ended outputs. The device is part of a complete family of VGAs targeting Frequency Division Duplex (FDD) or Time Division Duplex (TDD) 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 typical maximum gain, +35dBm OIP3, +17dBm output P1dB, and 5.7dB NF. Each channel includes a Glitch-Free™ digital step attenuator that reduces gain by up to 31.5dB in precise 0.5dB steps.
The F4481 is packaged in an 8mm × 8mm 56-LGA, with matched 100Ω differential input and 50Ω single-ended output impedances for ease of integration into the signal path.
Features
- Independent quad channels for FDD TX applications
- 400MHz to 1100MHz
- 28dB typical max gain at 900MHz
- Precise SPI-controlled Glitch-Free™ gain adjustment
- 31.5dB gain range with 0.5dB step size
- 5.7dB NF at 900MHz
- +35dBm OIP3 at 900MHz
- +17dBm output P1dB at 900MHz
- 3.3V supply voltage
- ICC = 524mA
- 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 (TEP) range: -40 °C to +115 °C
- 8mm × 8mm, 56-LGA package
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 3.19 MB | |
| Guide | PDF 2.83 MB | |
| Product Brief | PDF 506 KB | |
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Design & Development
Software & Tools
Boards & Kits
Evaluation
F4481EVS
Active
Evaluation System for the F4481 DIFF-In / SE-Out Quad Path TX DVGA
The F4481EVS is the evaluation system that enables customers to evaluate the F4481 DIFF-In/SE-Out Quad Path TX DVGA 400MHz to 1100MHz.
For more information, please see the Evaluation Kit section of the datasheet.
Recommended Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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