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

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

Product Details

Key Features

Applications/Uses

Parametric specs for Radio Receivers
Ref. Clock Freq. (MHz) 24.576
IF Output Frequency (MHz) 2.048
Noise Figure (dB) (typ) 2.9
VSUPPLY (V) 2.7 to 3.5
ISUPPLY (mA) 62
Applications DAB
T-DMB
Solutions Automotive
Consumer
Band/ Freq. (MHz) 168 to 240
1452 to 1492
Footprint (mm x mm) 6.0 x 6.0
Package/Pins TQFN/40
Budgetary
Price (See Notes)
3.65
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Parameters

Parametric specs for Radio Receivers
Ref. Clock Freq. (MHz) 24.576
IF Output Frequency (MHz) 2.048
Noise Figure (dB) (typ) 2.9
VSUPPLY (V) 2.7 to 3.5
ISUPPLY (mA) 62
Applications DAB
T-DMB
Solutions Automotive
Consumer
Band/ Freq. (MHz) 168 to 240
1452 to 1492
Footprint (mm x mm) 6.0 x 6.0
Package/Pins TQFN/40
Budgetary
Price (See Notes)
3.65

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

Applications/Uses

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

Description

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.

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .