MAX2172:Direct-Conversion to Low-IF Tuner for Digital Audio Broadcast

High-Performance Digital Radio Tuner Incorporates Fast and Accurate RSSI Function

The MAX2172 direct-conversion to low-IF tuner is 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 MAX2172 achieves a high level of component integration, allowing lowpower, 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 MAX2172 provides a buffered reference clock at 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 MAX2172 is available in a 40-pin thin QFN package (6mm x 6mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.

Key Features
  • +2.7V to +3.5V Supply Voltage Range
  • Low-IF Output Eliminates IF-Saw Filter
  • Integrated FM/VHF-III Bandpass Filter
  • Integrated Low-IF Bandpass Filter
  • Sigma-Delta Fractional-N Synthesizer
  • +45dBc ACPR (N±1)
  • 2.9dB Typical Noise Figure for VHF-III (Includes On-Chip Tracking Filter)
  • 3.1dB Typical Noise Figure for L-Band
  • VHF-III Sensitivity of -101dBm
  • L-Band Sensitivity of -101dBm
  • Baseband Overload Detector Controls RF AGC
  • Fast Channel Scan RSSI 5-Bit Output
  • FM (S+N)/N = 26dB at -111dBm
  • Small 6mm x 6mm Thin QFN Package
MAX2172: Functional Diagram
MAX2172: Functional Diagram
Applications/Uses
  • Fixed and Mobile Digital Audio Broadcast (DAB, DAB+) with FM
  • Terrestrial Digital Multimedia Broadcast (T-DMB) with FM
Parametrics
Part NumberRef. Clock Freq.
(MHz)
IF Output Freq.
(MHz)
Noise Figure
(dB)
VSUPPLY
(V)
ISUPPLY
(mA)
ApplicationsSolutionsBand/ Freq.
(MHz)
Footprint
(mm x mm)
Package/PinsBudgetary
Price
typSee Notes
MAX217224.5762.0482.92.7 to 3.561DAB
FM
T-DMB
Automotive
Consumer
87 to 108
168 to 240
1452 to 1492
6.0 x 6.0TQFN/40$3.92 @1k
Design kits & evaluation modules
Quality and Environmental Data
Related Products
  • MAX2170:Direct-Conversion to Low-IF Tuners for Digital Audio Broadcast
  • MAX3580:Direct-Conversion TV Tuner
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2172ETL+Active: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL+C8SNo Longer AvailableMAX2173ETL+TTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL+TActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL/V+Active: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL/V+CBMActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL/V+CDFActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL/V+CDGActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL/V+TActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL/V+TCBMActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172ETL/V+TCDFActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2172ETL/V+TCDGActive: Data sheet on request onlyTQFN,;40 pin;37.2 mm?-40°C to +85°CLead Free
MAX2172.pdf MAX2172
MAX2172
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