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MAX2170, MAX2171

Direct-Conversion to Low-IF Tuners for Digital Audio Broadcast

Highest Performance, Most Integrated Triple-Band Receivers for T-DMB/DAB/FM Digital Radios
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Active: Data sheet on request only


The MAX2170/MAX2171 direct-conversion to low-IF tuners are designed for Digital Audio Broadcast (DAB) and Terrestrial Digital Multimedia Broadcast (T-DMB) applications, covering an input frequency range of 168MHz to 240MHz (VHF-III), 1452MHz to 1492MHz (L-Band), and also 87MHz to 108MHz (FM). The MAX2170/MAX2171 achieve a high level of component integration, allowing low-power, tuner-on-board designs. The direct-conversion to low-IF architecture eliminates the need for an IF-SAW filter while providing a balanced 2.048MHz center frequency baseband output to the demodulator.

The MAX2170 provides a buffered reference clock at the crystal frequency, while the MAX2171 outputs a reference at 1/3rd of the crystal frequency. A sigma-delta fractional-N synthesizer is incorporated to optimize both close-in and wideband phase noise performances for OFDM applications where sensitivity to both 1kHz phase noise and wideband phase noise related to strong adjacents can be a problem.

The MAX2170/MAX2171 are available in a 40-pin thin QFN package (6mm x 6mm) with an exposed paddle. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.

Data Sheet

An evaluation board is available: MAX2170EVKIT

Key Features

  • +2.7V to +3.5V Supply Voltage Range
  • Low-IF Output Eliminates IF-SAW Filter
  • Integrated Low-IF Bandpass Filter
  • Sigma-Delta Fractional-N Synthesizer
  • +45dB Digital ACPR
  • 3.5dB Typical Noise Figure for VHF-III (Includes On-Chip Tracking Filter)
  • 3.1dB Typical Noise Figure for L-Band
  • VHF-III Sensitivity of -100dBm
  • L-Band Sensitivity of -99dBm
  • Baseband Overload Detector Controls RF AGC


  • Fixed and Mobile Digital Audio Broadcast (DAB)
  • Terrestrial Digital Multimedia Broadcast (T-DMB)

Key Specifications:

Digital Radio Receivers
Part Number Ref. Clock Freq.
Noise Figure
Band/ Freq.
(mm x mm)
typ See Notes
MAX2170  24.576 2.048 2.9 2.7 to 3.5 62 168 to 240 and 1452 to 1492 6.0 x 6.0 $3.22 @1k
MAX2171  3 87 to 108, 168 to 240 and 1452 to 1492
See All Digital Radio Receivers (6)

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.

More Information

New Product Press Release   2008-06-04 ] [ 2007-05-10 ]

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Document Ref.: 19-0699 Rev 3; 2010-03-26
This page last modified: 2010-03-26