LTC6431AIUF-20#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
The LTC6431AIUF-20#PBF is a wideband medium-power IF amplifier by Analog Devices, providing a fixed 20 dB gain with low distortion and 50 ohm input/output impedance matching. It is optimized for intermediate frequency signal chains in communications and radar receivers. Packaged in a compact QFN footprint for surface-mount assembly.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- LTC6431AIUF-20#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $7.0000(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC6431AIUF-20#PBF?
- Fixed 20 dB gain block with 50 ohm matched input and output impedance for direct cascade in RF/IF signal chains
- Low distortion wideband IF amplifier optimized for high dynamic range receiver front-ends
- Compact QFN (UF) package enabling dense microwave PCB layouts and short signal paths
- Matte tin terminal finish for RoHS-compatible soldering processes
- Wide bandwidth medium-power classification suitable for IF frequencies up to several hundred MHz
What is LTC6431AIUF-20#PBF used for?
The LTC6431AIUF-20#PBF is used in RF and microwave receiver chains as a fixed-gain intermediate frequency (IF) amplifier stage, boosting signal levels between the mixer and ADC or demodulator with 20 dB of gain and low added noise. It is commonly found in cellular base station receivers, software-defined radios, radar systems, and cable infrastructure equipment requiring linear, low-distortion IF amplification. Its 50 ohm matched impedance and wideband response simplify integration with standard RF components and test equipment.
What are the specifications of LTC6431AIUF-20#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1697 |
| YTEOL | 8.5 |
| JESD-609 Code | e3 |
| RF/Microwave Device Type | WIDE BAND MEDIUM POWER |
| Terminal Finish | Matte Tin (Sn) |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Thailand |
Where can I find the LTC6431AIUF-20#PBF datasheet?
LTC6431AIUF-20#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC6431AIUF-20#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What gain and impedance characteristics make the LTC6431AIUF-20#PBF suitable for IF amplifier chains?
The LTC6431AIUF-20#PBF provides a fixed 20 dB voltage gain with 50 ohm input and output impedance matching, which allows it to be cascaded directly with standard RF components, mixers, and filters without external matching networks. Its low distortion characteristic maintains signal integrity in high dynamic range receiver architectures operating at intermediate frequencies. This combination of gain, impedance match, and linearity makes it a drop-in gain block for IF stages in cellular and radar systems.
In which receiver architectures does the LTC6431AIUF-20#PBF provide the most benefit as an IF gain stage?
The LTC6431AIUF-20#PBF is best suited for superheterodyne receivers, direct conversion receivers, and software-defined radio front-ends where a low-distortion 20 dB gain block is required between the first mixer and the ADC. Its wideband medium-power classification supports IF frequencies spanning tens of MHz to several hundred MHz, covering common IF bands used in cellular, satellite, and radar systems. The device also benefits cable TV infrastructure (CATV) and spectrum analyzer front-end designs requiring linear IF amplification.
How does the compact QFN package of the LTC6431AIUF-20#PBF help in dense microwave PCB designs?
The LTC6431AIUF-20#PBF is housed in a tiny QFN (UF) package with an exposed pad for thermal management, allowing placement in tight microwave PCB layouts with very short signal trace lengths between components. Shorter traces at IF frequencies reduce parasitic inductance and capacitance, improving amplifier flatness and return loss. This package also supports automated SMT assembly at high throughput, reducing production cost for volume RF hardware manufacturing.
When selecting between the LTC6431AIUF-20#PBF and a higher-gain variant, what system-level tradeoffs should designers consider?
Choosing the 20 dB gain version of the LTC6431 is appropriate when the preceding stage (e.g., a passive mixer) introduces enough loss that 20 dB of recovery is sufficient to set the noise figure of the IF chain without overdriving subsequent stages at maximum input signal. A higher-gain variant would increase the risk of gain stage compression and intermodulation distortion if the input IP3 of downstream components is limited. Designers should simulate the cascaded noise figure and IIP3 across the full 50 ohm signal chain to confirm the 20 dB stage is the correct gain distribution choice.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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|---|---|---|
| 1+ | $14.6400 | $14.64 |
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