GPS/GNSS Front-End Amplifier

Dual-Stage, Low-Noise Amplifier Solution Includes Gain-Step Control


The MAX2670 GPS/GNSS front-end amplifier IC is designed for automotive and marine GPS/GNSS satellite navigation antenna modules or for any application that needs to compensate for cable losses from the antenna to receiver. Two unconditionally stable low-noise amplifier stages provide the high gain and integrated I/O matching to minimize the need for external matching components and eliminate the need for additional gain stages. The device features the option to place a bandpass ceramic or SAW filter between the two amplifier stages to provide a narrow-band output to further improve the noise performance of the GPS/GNSS receiver. Additionally, a 3.4dB gain step is provided to compensate for cable loss variation between different applications.

The device is designed to operate across all GNSS frequency standards with a 34.8dB typical cascaded gain and a 25mA supply current. The two LNA stages allow the use of a wide range of GNSS filter types for maximum flexibility in system design. The final RF output pin, which drives the cable to the GNSS receiver, is also the power-supply connection that accepts a DC supply in the +3.0V to +5.5V range. Alternatively, the DC supply can be applied to pin 4.

This GPS/GNSS front-end amplifier is designed on a low-noise, advanced SiGe process and is available in a lead-free, 10-pin TDFN surface-mount package (3mm x 3mm).

Key Features

  • First Amplifier Noise Figure*: 1.0dB
  • High Gain**: 34.8dB
  • 3.4dB Gain Step
  • Shared VCC and RFOUT2 Pin
  • Integrated 50Ω Output Matching
  • 3.0V to 5.5V Supply Voltage Range
  • Small, Low-Cost Package (3mm x 3mm)
  • AEC-Q100 Qualified
  • ESD Protected to ±2kV Human Body Model


  • Active Antennas
  • Integrated Automotive and Marine GPS Receivers
Part Number RF Freq.
RF Freq.
Noise Figure
Input IP3
(mm x mm)
Package/Pins Budgetary
min max See Notes
MAX2670  1575 1575 1 34.8 -12 25 3.0 x 3.0
$2.45 @1k
See All Low-Noise Amplifiers (42)
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.

MAX2670EVKIT: Evaluation Kit for the MAX2670

Technical Documents

Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs

Quality and Environmental Data

Product Reliability Reports: MAX2670.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX2670

Related Resources

RF to Bits Automotive Radio Tuner

  • RF to Bits Architecture with I2S Output
  • Single Supply Voltage of +3.3V
  • Integrated VHF Band-III Loop-Through

Universal GNSS Receiver

  • GPS/GLONASS/Galileo/BeiDou Systems
  • Dual-Input Selectable LNA for Separate Passive and Active Antenna Inputs
  • 1.4dB Cascaded Noise Figure and 110dB of Cascaded Gain with Gain Control Range of 59dB From PGA