TRF3765_15 Datasheet, PDF (1/52 Pages) Texas Instruments – Integer-N/Fractional-N PLL With Integrated VCO

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TRF3765
SLWS230E – SEPTEMBER 2011 – REVISED DECEMBER 2015
TRF3765 Integer-N/Fractional-N PLL With Integrated VCO
1 Features
•1 Output Frequencies: 300 MHz to 4.8 GHz
• Low-Noise VCO: –133 dBc/Hz
(1-MHz Offset, f_OUT = 2.65 GHz)
• 13-/16-Bit Reference/Feedback Divider
• 25-Bit Fractional-N and Integer-N PLL
• Low RMS Jitter: 0.35 ps
• Input Reference Frequency Range:
0.5 MHz to 350 MHz
• Programmable Output Divide-by-1/-2/-4/-8
• Four Differential LO Outputs
• External VCO Input with Programmable VCO
On/Off Control
2 Applications
• Wireless Infrastructure
• Wireless Local Loop
• Point-to-Point Wireless Access
• Wireless MAN Wideband Transceivers
3 Description
The TRF3765 is a wideband Integer-N/Fractional-N
frequency synthesizer with an integrated, wideband
voltage-controlled oscillator (VCO). Programmable
output dividers enable continuous frequency
coverage from 300 MHz to 4.8 GHz. Four separate
differential, open-collector RF outputs allow multiple
devices to be driven in parallel without the need of
external splitters.
The TRF3765 also accepts external VCO input
signals and allows on/off control through a
programmable control output. For maximum flexibility
and wide reference frequency range, wide-range
divide ratio settings are programmable and an off-
chip loop filter can be used.
The TRF3765 is available in an RHB-32 VQFN
package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TRF3765
VQFN (32)
5.00 mm x 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Block Diagram
LD
STROBED ATA CLOCK
VCCs
GNDs
REF_IN
Lock
Detect
R Div
Serial
Interface
PFD
Charge
Pump
EXTVCO_IN
CP_OUT
N-Divider
Prescaler
div p/p_+1
RF
Divider
From
4WI
SD
Control
From
4WI
From
4WI
Divide-by
1/2/4/8
VTUNE_IN
RF4_OUT
RF3_OUT
RF2_OUT
RF1_OUT
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.