Document
www.ti.com
TRF3750
SLWS146B − MARCH 2004 − REVISED AUGUST 2007
HIGH-PERFORMANCE INTEGER-N PLL FREQUENCY SYNTHESIZER
FEATURES
D Single Device Covers Frequencies Up to
2.4 GHz
D Dual Supply Range: 3 V − 3.6 V and
4.5 V − 5.5 V
D Separate Charge Pump Supply (VCP) Up
to 8 V
D Simple 3-Wire Serial Interface Allows for Fully
Programmable: − A, B, and R Counters − Dual Modulus Prescaler [8/9, 16/17, 32/33, and 64/65] − Charge Pump Current
D Lock Detect Output (Digital and Analog) D Versatile Hardware and Software Power Down D Packaged in a 16-Pin TSSOP Thin Quad
FlatPack and a 20-Pin 4 x 4 mm QFN Package
APPLICATIONS
D Wireless Infrastructure
− GSM, IS136, EDGE/UWC−136 − IS95, UMTS, CDMA2000
D Portable Wireless Communications D Wireless LAN D Wireless Transceivers D Communication Test Equipment
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 dualmodulus 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 extended charge-pump supply (VCP) of up to 8 V, a wide 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.
PW PACKAGE (TOP VIEW)
RSET CPOUT CPGND
AGND RFIN RFIN AVDD
REFIN
1 2 3 4 5 6 7 8
16 VCP 15 DVDD 14 MUXOUT 13 LE 12 DATA 11 CLOCK 10 CE 9 DGND
RGP PACKAGE (TOP VIEW)
CPOUT RSET VCP DVDD DVDD
CPGND AGND AGND RFIN RFIN
1 20
19
18
17
16 15
2 14
3 13
4 12
5 11 6 7 8 9 10
MUXOUT
LE DATA CLOCK CE
AVDD AVDD REFIN DGND DGND
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.
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.
Copyright © 2007, Texas Instruments Incorporated
TRF3750
SLWS146B − MARCH 2004 − REVISED AUGUST 2007
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
FUNCTION.