MAX2173:RF to Bits Tuner for Digital Audio Broadcast

RF to Bits DAB/FM Front-End Helps Reduce the DSP MIPS with Internal Digital Filtering

The MAX2173 is a highly integrated direct-conversion tuner for digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (T-DMB) applications in the 168MHz to 240MHz (VHF band-III) and 1452MHz to 1492MHz (L-band) frequency bands. For FM and DRM+ reception, a low-IF conversion is used, covering a frequency range of 76MHz to 108MHz (FM band). The design integrates lowpass filters, enabling low-power tuner-on-board designs. The mixer and lowpass filtering are followed by a dual ADC and digital filtering. The digital filtering reduces the output data rate and eases the processing load on the DSP. The resulting bit stream is driven off-chip via an I?S format bus. An integrated digitally controlled crystal oscillator provides more than ±50ppm control range, eliminating the need for a VCXO. The MAX2173 also provides a buffered-reference clock output at the crystal frequency (fREF) or fREF/3. Two LDOs are integrated into the MAX2173. The 1.6V LDO can be used to power the internal 1.6V circuitry. External circuits can be powered using the 1.2V LDO, eliminating the need for a stand-alone 1.2V regulator. The MAX2173 is available in a 40-pin TQFN package (6mm x 6mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.

Key Features
  • RF to Bits? Solution with I?S Format Output
  • Integrated DCXO Provides ±50ppm Control
  • Integrated Digital Filtering
  • RSSI Output Through I?C or I?S
  • Integrated FM/VHF Band-III RF Bandpass Filter
  • Fully Integrated AGC Control Loops
  • Integrated 1.2V and 1.6V LDOs
  • Small Package (6mm x 6mm TQFN)
  • Automotive DAB Products
  • Fixed and Mobile DAB/FM Products
  • T-DMB/FM Products
Part NumberRef. Clock Freq.
Noise Figure
ApplicationsSolutionsBand/ Freq.
(mm x mm)
MAX217324.5762.73.1 to 3.5135DAB
76 to 90
87 to 108
168 to 240
1452 to 1492
6.0 x 6.0TQFN/40
Related Products
  • MAX2172:Direct-Conversion to Low-IF Tuner for Digital Audio Broadcast
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2173ETL+ActiveTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2173ETL+TActiveTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2173ETL/V+ActiveTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2173ETL/V+TActiveTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2173ETL/V+TWNo Longer AvailableMAX2173ETL/V+TTQFN;-40°C to +85°CSee data sheet
MAX2173ETL/V+WNo Longer AvailableMAX2173ETL/V+TQFN;-40°C to +85°CSee data sheet
MAX2173EVKIT#ActiveEVKIT;-40°C to +85°CSee data sheet
Auto Infotainment - Driving the Course for Connectivity MAX2173
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