MAX2140:Complete SDARS Receiver

The MAX2140 complete receiver is designed for satellite digital audio radio services (SDARS). The device includes a fully monolithic VCO and only needs a SAW at the IF and a crystal to generate the reference frequency. To form a complete SDARS radio, the MAX2140 requires only a low-noise amplifier (LNA), which can be controlled by a baseband controller. The small number of external components needed makes the MAX2140-based platform the lowest cost and the smallest solution for SDARS. The receiver includes a self-contained RF AGC loop and baseband-controlled IF AGC loop, effectively providing a total dynamic range of over 92dB. Channel selectivity is ensured by the SAW filter and by on-chip monolithic lowpass filters. The fractional-N PLL allows a very small frequency step, making possible the implementation of an AFC loop. Additionally, the reference is provided by an external XTAL and on-chip oscillator. A reference buffer output is also provided. A 2-wire interface (I?C bus compatible) programs the circuit for a wide variety of conditions, providing features such as: Programmable gains Lowpass filters tuning Individual functional block shutdown The MAX2140 minimizes the requirement on the baseband controller. No compensation or calibration procedures are required. The device is available in a 7mm x 7mm 44-pin thin QFN package.

Key Features
  • Integrated Receiver, Requires Only One SAW Filter
  • Self-Contained RF AGC Loop
  • Differential I/Q Interface
  • Complete Integrated Frequency Generation
  • Bias Supply for External LNAs
  • Overcurrent Protection
  • Low-Power Standby Mode
  • Very Small 44-Pin Thin QFN Package
MAX2140: Block Diagram
MAX2140: Block Diagram
Applications/Uses
  • 2.4GHz ISM Radios
  • Satellite Digital Audio Radio Services (SDARS)
DataSheet
titleDownload file
MAX2140?Data SheetMAX2140.pdf
Parametrics
Part NumberApplicationsSolutionsBand/ Freq.
(MHz)
Footprint
(mm x mm)
Package/PinsBudgetary
Price
See Notes
MAX21402.4GHz ISM
SDARS
Satellite
SAT2200 to 25007.0 x 7.0TQFN/44$6.72 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2140ETHNo Longer AvailableMAX2140ETH+TQFN,;44 pin;50.4 mm?-40°C to +85°CNo
MAX2140ETH+ActiveTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2140ETH+CK3ActiveTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2140ETH+TActiveTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2140ETH+TCK3ActiveTQFN,;44 pin;50.4 mm?-40°C to +85°CLead Free
MAX2140ETH-TNo Longer AvailableMAX2140ETH+TTQFN,;44 pin;50.4 mm?-40°C to +85°CNo
MAX2140.pdf MAX2140
MAX2140.pdf MAX2140
MAX2140.pdf MAX2140
MAX2140.pdf MAX2140
MAX2140.pdf MAX2140
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