TRF3761-HIRHAR ,Low Noise Integer N PLL Frequency Synthesizer With Integrated VCO 40-VQFN -40 to 85Features 3 DescriptionTRF3761 is a family of high performance, highly1• Fully Integrated VCOintegra ..
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TRF3761-HIRHAR
Low Noise Integer N PLL Frequency Synthesizer With Integrated VCO
TRF3761
(TOPVIEW)
GND
AVDD_BIAS
RBIAS1
GND
VCTRL_IN
AVDD_VCO
AVDD_BUF
AVDD_CAPARRAY
GND
PD_OUTBUF
CHIP_EN
CLOCK
DATA
STROBE
DGND
DGND
DVDD1
GND
DVDD2MUX_OUTREF_INGNDA
VDD_REF
VDD_CP
CPOUTGNDA
VDD
GND
GNDGND
GND
RBIAS23940 373635343332311211 141516
To Microcontroller
To Microcontroller
REF
1000 pF
2.37 kΩ R1
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TRF3761, TRF3761-A, TRF3761-B
TRF3761-C, TRF3761-D, TRF3761-E, TRF3761-F
TRF3761-G, TRF3761-H, TRF3761-J, TRF3761-KSLWS181K –OCTOBER 2005–REVISED DECEMBER 2015
TRF3761-x Integer-N PLL with Integrated VCO Features 3 DescriptionTRF3761isa family of high performance, highly Fully Integrated VCO integrated frequency synthesizers, optimized for high• Low Phase Noise: –137dBc/Hz (at 600kHz, fVCO performance applications. The TRF3761 includesaof 1.9GHz) low-noise, voltage-controlled oscillator (VCO) and an Low Noise Floor: –158dBc/Hzat 10MHz Offset integer-N PLL. Integer-N PLL TRF3761 integrates divide-by1,2,or4 options fora Input Reference Frequency range: 10MHzto more flexible output frequency range.Itis controlled
througha 3-wire serial-programming-interface (SPI)104MHz
interface. For power sensitive applications the• VCO Frequency Dividedby 2-4 Output TRF3761 can be powered down by the SPI interface• Output Buffer Enable Pin or externally via chip_en pin2. Programmable Charge Pump Current
Device Information(1)• Hardware and Software Power Down• 3-Wire Serial Interface• Single Supply: 4.5Vto 5.25V Operation
Applications (1) Forall available packages, see the orderable addendumat
the endofthe datasheet.• Wireless Infrastructure WCDMA, CDMA, GSM Wideband Transceivers Wireless Local Loop RFID Transceivers Clock generation IF LO generation
Application Schematic
