TRF2020

Features: · Three Separate Loops: 1 UHF and 2 VHF· Operation to 1.2-GHz for Main Synthesize· Operation to 250 MHz for Auxiliary Synthesizers· Fast Lock-up Time· High-Speed Serial Data Bus· Low Power Consumption· Ideal for Global Systems for Mobile Communications (GSM) Applications PinoutSpecificat...

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TRF2020 Picture
SeekIC No. : 004528077 Detail

TRF2020: Features: · Three Separate Loops: 1 UHF and 2 VHF· Operation to 1.2-GHz for Main Synthesize· Operation to 250 MHz for Auxiliary Synthesizers· Fast Lock-up Time· High-Speed Serial Data Bus· Low Power...

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Part Number:
TRF2020
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: 2024/11/8

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Product Details

Description



Features:

· Three Separate Loops: 1 UHF and 2 VHF
· Operation to 1.2-GHz for Main Synthesize
· Operation to 250 MHz for Auxiliary Synthesizers
· Fast Lock-up Time
· High-Speed Serial Data Bus
· Low Power Consumption
· Ideal for Global Systems for Mobile Communications (GSM) Applications
 



Pinout

  Connection Diagram


Specifications

Supply voltage VDDP   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 4.6 V
Supply voltage VDD, VDDA   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 6 V
Voltage applied to any other pin, VIN   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
Power dissipation at or below TA = 25°C  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 mW .
Junction temperature, TJ   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Ambient operating temperature, TA  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to 85°C
Storage temperature, TSTG  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended  erating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.



Description

The Texas Instruments (TI) TRF2020 is an integrated high performance frequency synthe- sizer device. The TRF2020 consists of one main 1.2-GHz synthesizer and two auxiliary 250-MHz synthesizers. Each synthesizer has an independent dual-modulus prescaler and separate powerdown modes.These features provide maximum flexibility for the design of 900-MHz wireless systems.

The main synthesizer TRF2020 consists of a 32/33-modulus prescaler with an 11-bit counter, a phase-frequency detector, and a charge pump. The phase-frequency detector is referenced to an internal reference frequency that is derived from an external TCXO signal. The phase-frequency detector TRF2020 is also provided with a dead-zone compensation circuit that reduces synthesizer phase noise during locked conditions.

Each auxiliary synthesizer TRF2020 consists of an independent 8/9-modulus prescaler with an 11-bit counter, a phase-frequency detector, and a charge pump. Similar to the main synthesizer, each auxiliary synthesizer's phase-frequency detector is referenced to an internal reference frequency that is derived from an external TCXO signal.

The external TCXO signal of TRF2020 is prescaled by an 11-bit counter and then distributed to three independent postscalers. Each postscaler provides a selectable, divide-by-1, -2, -4, or -8 function before the reference signal is distributed to the associated synthesizer phase detector. The reference frequency prescaler and independent postscalers are software programmable.

To achieve minimum lock-up time, each synthesizer TRF2020 contains a speed-up mode charge pump capable of providing 2 mA output current and an analog switch that can change the loop-filter time constant. The duration of the speed-up mode operations can be independently controlled with software.

The states of the three internal lock detectors of TRF2020 are provided on a programmable, combinational logic output; each synthesizer can be selected independently or ANDed together.

The TRF2020 is programmed over a three-wire, synchronous, serial data bus (clock, data, strobe) with achievable bit rates as high as 20 Mbits/sec. The data is partitioned into words in such a manner that static parameters may be sent once during initialization, and dynamic parameters, such as frequency, may be sent as often as needed. The TRF2020 is offered in a 24-pin plastic thin-shrink small-outline package (TSSOP) and is characterized for free-air operation from 40°C to 85°C.




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