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Description
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The MAX7031 crystal-based, fractional-N transceiver is designed to transmit and receive FSK data at factory-preset carrier frequencies of 308MHz, 315MHz, or
433.92MHz with data rates up to 33kbps (Manchester encoded) or 66kbps (NRZ encoded). This device generates a typical output power of +10dBm into a 50Ω
load, and exhibits typical sensitivity of -110dBm. The MAX7031 features separate transmit and receive pins (PAOUT and LNAIN) and provides an internal RF switch that can be used to connect the transmit and receive pins to a common antenna.
The MAX7031 transmit frequency is generated by a 16-bit, fractional-N, phase-locked loop (PLL), while the receiver's local oscillator (LO) is generated by an integer-N PLL. This hybrid architecture eliminates the need for separate transmit and receive crystal reference oscillators because the fractional-N PLL is preset to be 10.7MHz above the receive LO. Retaining the fixed-N PLL for the receiver avoids the higher current-drain requirements of a fractional-N PLL and keeps the receiver current drain as low as possible.
The fractional-N architecture of the MAX7031 transmit PLL allows the transmit FSK signal to be preset for exact frequency deviations, and completely eliminates the problems associated with oscillator-pulling FSK signal generation. All frequency-generation components are integrated on-chip, and only a crystal, a 10.7MHz IF filter, and a few discrete components are required to implement a complete antenna/digital data solution.
The MAX7031 is available in a small, 5mm x 5mm, 32-pin, thin QFN package, and is specified to operate in the automotive -40°C to +125°C temperature range.
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| MAX7031 |
Free
Sample |
Buy |
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Package:
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TYPE PINS FOOTPRINT
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DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis |
MAX7031EVKIT-315
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Active
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Land Pattern: Not Available
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See data sheet
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MAX7031EVKIT-433
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Active
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Land Pattern: Not Available
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See data sheet
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MAX7031LATJ+
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Active
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TQFN;32 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0001 (PDF)
Use pkgcode/variation: T3255+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX7031LATJ+T
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Active
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Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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MAX7031MATJ50+
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Active
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TQFN;32 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0001 (PDF)
Use pkgcode/variation: T3255+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX7031MATJ50+T
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Active
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Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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MAX7031HATJ17
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Active
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TQFN;32 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0001 (PDF)
Use pkgcode/variation: T3255-3*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis
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MAX7031HATJ17-T
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Active
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Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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MAX7031HATJ17+
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Active
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TQFN;32 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0001 (PDF)
Use pkgcode/variation: T3255+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX7031HATJ17+T
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Active
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Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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MAX7031HATJ51+
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Active
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TQFN;32 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0001 (PDF)
Use pkgcode/variation: T3255+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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MAX7031HATJ51+T
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Active
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TQFN;32 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0001 (PDF)
Use pkgcode/variation: T3255+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis
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