FM Automotive Low-Noise Amplifier

Smaller BOM and Cost with Programmable Attack Point and Gain

Please check latest availability status for a specific part variant.


The MAX2181A is a highly integrated FM variable-gain low-noise amplifier ideal for use in automotive FM and FM-diversity active antenna applications. The device features an FM signal path, providing 30dB of gain range, controlled by an on-chip power detector. The FM signal path covers 76MHz to 162.5MHz.

The device is available in a small, 3mm x 3mm, TQFN package and operates over the extended industrial temperature range (-40°C to +85°C).

MAX2181A: Simplified Block Diagram MAX2181A: Simplified Block Diagram Enlarge+

Key Features

  • +5V Supply Voltage
  • Integrated AGC Function Eliminates External Pin Diodes
  • High Dynamic Range
  • Low-Noise, Sub 3dB Noise Figure
  • Low External BOM
  • Small Package (3mm x 3mm TQFN)
  • Integrated Power Detector


  • Automotive Active Antenna
  • Automotive Head Unit

See parametric specs for Low-Noise Amplifiers (42)

Part NumberRF Freq.
RF Freq.
Noise Figure
(mm x mm)
minmaxSee Notes
MAX2181A 76162.52.78.5563.0 x 3.0
$0.82 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX2181AEVKIT: Evaluation Kit for the MAX2181A

Technical Documents

Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
Request Reliability Report for: MAX2181A 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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