MAX2141:Low-Power XM Satellite Radio Receiver

Complete XM Satellite Radio Tuner for Simultaneous Data and Audio Applications Uses Half the Power

The MAX2141 complete low-power receiver is designed for XM satellite radio applications. To form a complete XM radio, the MAX2141 requires only an active antenna module, a crystal, and a SAW filter. The small number of external components needed makes the MAX2141 platform the lowest cost and the smallest wideband receiver solution available. The receiver includes a self-contained RF AGC loop and IF AGC loop, effectively providing a total dynamic range in excess of 92dB. Channel selectivity is achieved by the SAW filter and by the on-chip lowpass filters. An integrated fractional-N synthesizer allows fine frequency step, making possible the implementation of a software AFC loop. Additionally, a reference buffer is provided for driving a baseband controller. An I?C bus-compatible interface programs the MAX2141, providing features such as programmable gains, variable-bandwidth lowpass filter tuning, and various power-down modes. The MAX2141 is Maxim's 2nd-generation device for XM satellite radio applications. It is a drop-in replacement for the 1st-generation MAX2140. While significantly reducing power dissipation, the MAX2141 adds an optional closed-loop IF power control, standby mode, enhanced reference buffer, and improved RF gain-control accuracy. The MAX2141 is rated to operate over the -40°C to +85°C extended temperature range and is available in a 7mm x 7mm, 44-pin thin QFN package.

Key Features
  • Pin Compatible with the MAX2140
  • Self-Contained RF AGC Loop
  • Self-Contained IF AGC Loop
  • +2.85V to +3.6V Operating Voltage Range
  • Complete Integrated Frequency Generation
  • Overcurrent Protection for External LNA
  • Low-Power Standby Mode
  • Very Small 44-Pin TQFN Package
  • 250mW Power Dissipation (at VCC = +3.0V)
  • XM Satellite Radio
Part NumberRef. Clock Freq.
Noise Figure
ApplicationsSolutionsBand/ Freq.
(mm x mm)
typSee Notes
MAX214123.928.72.85 to 3.60862.4GHz ISM
SAT2200 to 25007.0 x 7.0TQFN/44$5.75 @1k
Quality and Environmental Data
Related Products
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2141ETH+Active: Data sheet on request onlyTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2141ETH+TActive: Data sheet on request onlyTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2141ETH/V+Active: Data sheet on request onlyTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2141ETH/V+TActive: Data sheet on request onlyTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2141.pdf MAX2141
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