Low-Voltage IF Transceiver with Limiter and RSSI

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The MAX2511 is a complete, highly integrated IF transceiver for applications employing a dual-conversion architecture. Alternatively, the MAX2511 can be used as a single-conversion transceiver if the RF operating frequency ranges from 200MHz to 440MHz.

In a typical application, the receiver downconverts a high IF/RF (200MHz to 440MHz) to a 10.7MHz low IF using an image-reject mixer. Functions include an image-reject downconverter with 34dB of image suppression followed by an IF buffer that can drive an off-chip IF filter; an on-chip limiting amplifier offering 90dB of monotonic received-signal-strength indication (RSSI); and a robust limiter output driver. The transmit image-reject mixer generates a clean output spectrum to minimize filter requirements. It is followed by a 40dB variable-gain amplifier that maintains IM3 levels below -35dBc. Maximum output power is 2dBm. A VCO and oscillator buffer for driving an external prescaler are also included.

The MAX2511 operates from a 2.7V to 5.5V supply and includes flexible power-management control. Supply current is reduced to 0.1µA in shutdown mode.

For applications using in-phase (I) and quadrature (Q) baseband architecture for the transmitter, Maxim offers a corresponding transceiver product: the MAX2510. The MAX2510 has features similar to those of the MAX2511, but upconverts I/Q baseband signals using a quadrature upconverter.
MAX2511: Typical Operating Circuit MAX2511: Typical Operating Circuit Enlarge+

Key Features

  • Single +2.7V to +5.5V Supply
  • Complete Receive Path:
    • 200MHz to 440MHz (first IF) to
    • 8MHz to 13MHz (second IF)
  • Limiter with Differential Outputs (adjustable level)
  • RSSI Function with 90dB Monotonic Dynamic Range
  • Complete Transmit Path:
    • 8MHz to 13MHz (second IF) to
    • 200MHz to 440MHz (first IF)
  • On-Chip Oscillator with Voltage Regulator and Buffer
  • Advanced System Power Management (four modes)
  • 0.1µA Shutdown Supply Current


  • 400MHz ISM Transceivers
  • IF Transceivers
  • PACS, PHS, DECT, and Other PCS Wireless Handsets and Base Stations
  • PWT1900 Wireless Handsets and Base Stations
  • Wireless Data Links

See parametric specs for ISM RF Transceivers < 1GHz (5)

Part NumberFrequency Range
Modulation ModeTx Output Power
MAX2511 200 to 440Quadrature2

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.

Technical Documents

Tutorial 5300 RF Basics
Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
Request Reliability Report for: MAX2511 
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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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