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

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Highest Performance, Most Integrated Triple-Band Receivers for T-DMB/DAB/FM Digital Radios

Part Details
  • +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
Additional Details
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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.


  • Fixed and Mobile Digital Audio Broadcast (DAB)
  • Terrestrial Digital Multimedia Broadcast (T-DMB)
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1


MAX2170 Evaluation Kit



MAX2170 Evaluation Kit

MAX2170 Evaluation Kit

Features and Benefits

  • Easy Evaluation of the MAX2170
  • +2.7V to +3.5V Single-Supply Operation
  • 50Ω SMA Connector on the RF Ports
  • 50Ω BNC Connector for the Baseband Output
  • Jumpers for Automatic Gain Control
  • All Critical Peripheral Components Included
  • Parallel Port for I²C Interfacing
  • PC Control Software Available at

Product Detail

The MAX2170 evaluation kit (EV kit) simplifies evaluation of the MAX2170 direct-conversion to low-IF tuner. It enables testing of the device's performance and requires no additional support circuitry. Standard 50Ω SMA and BNC connectors are included on the EV kit for the inputs and outputs to allow quick and easy evaluation on the test bench. The EV kit is fully assembled and tested at the factory.

This document provides a list of equipment required to evaluate the device, a straightforward test procedure to verify functionality, a description of the EV kit circuit, the circuit schematic, a bill of materials (BOM) for the kit, and artwork for each layer of the PCB.


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

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