TRF3750

SLWS146A − MARCH 2004 − REVISED NOVEMBER 2004

HIGH-PERFORMANCE INTEGER-N PLL FREQUENCY SYNTHESIZER

FEATURES

2.4 GHz

4.5 V − 5.5 V

to 8 V

Programmable:

− A, B, and R Counters

− Dual Modulus Prescaler [8/9, 16/17, 32/33,

and 64/65]

− Charge Pump Current

FlatPack and a 20-Pin 4 x 4 mm QFN Package

APPLICATIONS

− GSM, IS136, EDGE/UWC−136

− IS95, UMTS, CDMA2000

DESCRIPTION

The TRF3750 frequency synthesizer is ideal for designing

the local os cillator portion of wireless transceivers by

providing complete programmability and ultra-low phase

noise. The device features a user-selectable dual-

modulus prescaler, a 14-bit reference (R) divider, a 6-bit A,

and a 13-bit B counter. The R divider allows the user to

select the frequency of choice for the phase-frequency

detector (PFD) circuit, and with the use of the counters

implement an N divider of value N = A + P x B. With an

variety of external VCOs can be used to complete the

phase-locked loop. Ultra-low phase noise and reference

spur performance make the TRF3750 ideal for generating

the local oscillator in the most demanding wireless

applications.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

RSET

CPOUT

CPGND

AGND

RFIN

RFIN

AVDD

REFIN

VCP

DVDD

MUXOUT

LE

DATA

CLOCK

CE

DGND

PW PACKAGE

(TOP VIEW)

MUXOUT

RGP PACKAGE

(TOP VIEW)

CPGND

1

2

3

4

5

15

14

13

12

11

6

7

8910

20 19 18 17 16

LE

DATA

CLOCK

CE

RFIN

RFIN

AGND

AGND

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Copyright  2004, Texas Instruments Incorporated