TRF3765 Datasheet, PDF (1/51 Pages) Texas Instruments – Integer-N/Fractional-N PLL with Integrated VCO

TRF3765
www.ti.com
SLWS230C – SEPTEMBER 2011 – REVISED JANUARY 2012
Integer-N/Fractional-N PLL with Integrated VCO
Check for Samples: TRF3765
FEATURES
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•2 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
APPLICATIONS
• Wireless Infrastructure
• Wireless Local Loop
• Point-to-Point Wireless Access
• Wireless MAN Wideband Transceivers
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 QFN
package.
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
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011–2012, Texas Instruments Incorporated