TRF3761 Datasheet, PDF (1/57 Pages) Texas Instruments – INTEGER-N PLL WITH INTEGRATED VCO

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TRF3761, TRF3761-A, TRF3761-B
TRF3761-C, TRF3761-D, TRF3761-E, TRF3761-F
TRF3761-G, TRF3761-H, TRF3761-J, TRF3761-K
SLWS181K – OCTOBER 2005 – REVISED DECEMBER 2015
TRF3761-x Integer-N PLL with Integrated VCO
1 Features
•1 Fully Integrated VCO
• Low Phase Noise: –137dBc/Hz (at 600kHz, f_VCO
of 1.9GHz)
• Low Noise Floor: –158dBc/Hz at 10MHz Offset
• Integer-N PLL
• Input Reference Frequency range: 10MHz to
104MHz
• VCO Frequency Divided by 2-4 Output
• Output Buffer Enable Pin
• Programmable Charge Pump Current
• Hardware and Software Power Down
• 3-Wire Serial Interface
• Single Supply: 4.5V to 5.25V Operation
2 Applications
• Wireless Infrastructure
– WCDMA, CDMA, GSM
– Wideband Transceivers
– Wireless Local Loop
– RFID Transceivers
– Clock generation
– IF LO generation
3 Description
TRF3761 is a family of high performance, highly
integrated frequency synthesizers, optimized for high
performance applications. The TRF3761 includes a
low-noise, voltage-controlled oscillator (VCO) and an
integer-N PLL.
TRF3761 integrates divide-by 1, 2, or 4 options for a
more flexible output frequency range. It is controlled
through a 3-wire serial-programming-interface (SPI)
interface. For power sensitive applications the
TRF3761 can be powered down by the SPI interface
or externally via chip_en pin 2.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TRF3761
TRF3761-x
VQFN (40)
6.00 mm x 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Application Schematic
C1
C4
1000 pF
R2
C3
R1
C2
PD_OUTBUF
CHIP_EN
CLOCK
DATA
STROBE
DGND
DGND
DVDD1
AVDD_PRES
GND
40 39 38 37 36 35 34 33 32 31
1
30
2
29
3
28
4
27
5
TRF3761
26
6
(TOP VIEW)
25
7
24
8
23
9
22
10
21
11 12 13 14 15 16 17 18 19 20
GND
AVDD_BIAS
R3
2.37 kΩ
RBIAS1
GND
VCTRL_IN
AVDD_VCO
AVDD_BUF
AVDD_CAPARRAY
GND
AVDD
R5
120 Ω
VDD
C5
10 pF
R6
120 Ω
VDD
C6
10 pF
C7
1000 pF
R4
4.75 kΩ
LOAD
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.