SA8025A

Features: • Operation up to 1.8GHz at 3V• Fast locking by Fractional-N divider• Auxiliary synthesizer• Digital phase comparator with proportional and integral charge pump output• High speed serial input• Low power consumption• Programmable charge pump cu...

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SeekIC No. : 004483806 Detail

SA8025A: Features: • Operation up to 1.8GHz at 3V• Fast locking by Fractional-N divider• Auxiliary synthesizer• Digital phase comparator with proportional and integral charge pump o...

floor Price/Ceiling Price

Part Number:
SA8025A
Supply Ability:
5000

Price Break

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

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Upload time: 2024/11/22

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Product Details

Description



Features:

• Operation up to 1.8GHz at 3V
• Fast locking by "Fractional-N" divider
• Auxiliary synthesizer
• Digital phase comparator with proportional and integral charge pump output
• High speed serial input
• Low power consumption
• Programmable charge pump currents
• Supply voltage range 2.7 to 5.5V
• Excellent input sensitivity: VRF_IN = 20dBm



Application

• PHS (Personal Handy-phone System)
• PDC (Personal Digital Cellular)
• PCS (Personal Communication Service)
• Portable communication systems



Pinout

  Connection Diagram


Specifications

SYMBOL PARAMETER RATING UNITS
V Supply voltage, VDD, VDDA, VCCP -0.3 to +6.0 V
VIN Voltage applied to any other pin -0.3 to (VDD + 0.3) V
TSTG Storage temperature range -65 to +150 °C
TA Operating ambient temperature range -40 to +85 °C

NOTE: Thermal impedance (JA) = 117°C/W. This device is ESD sensitive.


Description

The SA8025A is a monolithic low power, high performance dual frequency synthesizer fabricated in QUBiC BiCMOS technology.

The SA8025A is an improved version of the SA8025, suitable for narrow band systems like the Japan Personal Digital Cellular (PDC) system. The new design improves the performance of the fractional spur compensation circuitry. The new version SA8025A is pin-for-pin compatible with the previous version. Featuring Fractional-N division with selectable modulo 5 or 8 implemented in the Main synthesizer to allow the phase detector comparison frequency to be five or eight times the channel spacing. SA8025A feature reduces the overall division ratio yielding a lower noise floor and faster channel switching. The phase detectors and charge pumps are designed to achieve phase detector comparison frequencies up to 5MHz. A four modulus prescaler (divide by 64/65/68/73) is integrated on chip with a maximum input frequency of 1.8GHz at 3V. Programming and channel selection are realized by a high speed 3-wire serial interface. A 1GHz version (SA7025DK) is also available with the same pinout.




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