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PMB2245

Features: • Transmitter with I/Q modulator• Direct I/Q modulation• Generation of orthogonal carriers with possibility of phase adjust with external resistors• 30-dB carrier rejection, 40-dB SSB rejection• 48-dB rejection of third order products with 500-mVpp I/Q-drive...

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PMB2245: Features: • Transmitter with I/Q modulator• Direct I/Q modulation• Generation of orthogonal carriers with possibility of phase adjust with external resistors• 30-dB carrier r...

PMB2245 Data Sheet

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Part Number:
PMB2245
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/25

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Product Details

Description



Features:

• Transmitter with I/Q modulator
• Direct I/Q modulation
• Generation of orthogonal carriers with possibility of phase adjust with external resistors
• 30-dB carrier rejection, 40-dB SSB rejection
• 48-dB rejection of third order products with 500-mVpp I/Q-drive level
• High output power with appropriate power matching network at 500-mVpp I/Q-drive level PMB 2240: 3 dBm, PMB 2245: 6 dBm PMB 2247: 8 dBm
• Integrated active part of RF oscillator
• Possibility to use external RF-oscillator signal
• The RF-oscillator signal is buffered for off-chip use,especially for receiver PMB 2405/07
• Prescaler for the RF-oscillator signal
• Possibility to use the IF oscillator integrated on the PMB 2405/07
• Possibility to use external IF-oscillator signal
• Fixed IF frequency PLL (FIX-PLL) for IF-VCO (PMB 2240,2245), switchable IF PLL working at 450-MHz or 150-MHz
IF frequency (PMB 2247)
• Supply voltage range 2.7 to 5.5 V
• P-TQFP-48 package
• Temperature range 30 to 85


Application

• Vector modulated cellular and cordless systems:
• PMB 2240: GSM, PDC, DAMPS
• PMB 2245: PCN, PCS, PHS
• PMB 2247: PCN, PCS, etc.
• Various modulation schemes, such as PM, PSK, FSK,QAM, QPSK, GMSK etc.
• Analog systems with FM- and AM modulation
• Space and power saving optimizations of existing discrete transmitter circuits


Description

The PMB 2240, 2245, 2247 family are single-chip transmitters which include a prescaler for the RF-oscillator signal and a fixed PLL for the IF-oscillator signal. The transmitter PMB2245 family is designed for use in combination with the single-chip receiver family PMB 2405, 2407 and the PLL PMB 2307 for mobile telephones according to the GSM, PCN and PCS standards and other vector modulated digital systems. PMB2245 is fabricated using Siemens B6HF silicon process:




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