TRF3750
www.ti.com
SLWS146A − MARCH 2004 − REVISED NOVEMBER 2004
HIGH-PERFORMANCE INTEGER-N PLL FREQUENCY SYNTHESIZER
and a 13-bit B counter. The R divider allows the user to
FEATURES
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.
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D
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D
Single Device Covers Frequencies Up to
2.4 GHz
Dual Supply Range: 3 V − 3.6 V and
4.5 V − 5.5 V
Separate Charge Pump Supply (V ) Up
CP
to 8 V
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
PW PACKAGE
(TOP VIEW)
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8
16
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9
RSET
CPOUT
CPGND
AGND
RFIN
RFIN
AVDD
REFIN
VCP
DVDD
MUXOUT
LE
DATA
CLOCK
CE
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Lock Detect Output (Digital and Analog)
Versatile Hardware and Software Power Down
Packaged in a 16-Pin TSSOP Thin Quad
FlatPack and a 20-Pin 4 x 4 mm QFN Package
DGND
APPLICATIONS
D
Wireless Infrastructure
− GSM, IS136, EDGE/UWC−136
− IS95, UMTS, CDMA2000
RGP PACKAGE
(TOP VIEW)
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Portable Wireless Communications
Wireless LAN
Wireless Transceivers
20 19 18 17 16
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2
3
CPGND
MUXOUT
15
Communication Test Equipment
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13
AGND
AGND
RFIN
LE
DESCRIPTION
DATA
CLOCK
CE
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5
12
11
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,
RFIN
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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 2004, Texas Instruments Incorporated