LTC6946 - Ultralow Noise and Spurious 0.37GHz to 6.39GHz Integer-N Synthesizer with Integrated VCO

The LTC®6946 is a high performance, low noise, 6.39GHz phase-locked loop (PLL) with a fully integrated VCO, including a reference divider, phase-frequency detector (PFD) with phase-lock indicator, ultralow noise charge pump, integer feedback divider, and VCO output divider. The charge pump contains selectable high and low voltage clamps useful for VCO monitoring.

The integrated low noise VCO uses no external components. It is internally calibrated to the correct output frequency with no external system support.

The part features a buffered, programmable VCO output divider with a range of 1 through 6, providing a wide frequency range.

Features

Low Noise Integer-N PLL with Integrated VCO
–226dBc/Hz Normalized In-Band Phase Noise Floor
–274dBc/Hz Normalized In-Band 1/f Noise
–157dBc/Hz Wideband Output Phase Noise Floor
Excellent Spurious Performance
Output Divider (1 to 6, 50% Duty Cycle)
Output Buffer Muting
Low Noise Reference Buffer
Charge Pump Current Adjustable from 250μA to 11.2mA
Configurable Status Output
SPI Compatible Serial Port Control
PLLWizard™ Software Design Tool Support
PLLWizard™ Software Design Tool Support

Typical Application

Applications

Wireless Base Stations (LTE, WiMAX, W-CDMA, PCS)
Broadband Wireless Access
Military and Secure Radio
Test and Measurement

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC6946IUFD-1#PBF	4x5 QFN-28	I	$8.22	$5.75
LTC6946IUFD-1#TRPBF	4x5 QFN-28	I		$5.81
LTC6946IUFD-2#PBF	4x5 QFN-28	I	$8.22	$5.75
LTC6946IUFD-2#TRPBF	4x5 QFN-28	I		$5.81
LTC6946IUFD-3#PBF	4x5 QFN-28	I	$8.22	$5.75
LTC6946IUFD-3#TRPBF	4x5 QFN-28	I		$5.81
LTC6946IUFD-4#PBF	4x5 QFN-28	I	$8.22	$5.75
LTC6946IUFD-4#TRPBF	4x5 QFN-28	I		$5.81

Demo Boards


Part Number	Description	Price
DC1705C-A	LTC6946-1 Demo Board\| Ultralow Noise and Spurious 373MHz to 3.74GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)	$125.00
DC1705C-B	LTC6946-2 Demo Board \| Ultralow Noise and Spurious 513MHz to 4.91GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)	$125.00
DC1705C-C	LTC6946-3 Demo Board \| Ultralow Noise and Spurious 640MHz to 5.79GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)	$125.00
DC1705C-D	LTC6946-4 Demo Board \| Ultralow Noise and Spurious 700MHz to 6.39GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)	$125.00

**Companion Boards**
Part Number	Description	Price
DC2026C	Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform	$75.00
DC2429A	LT3042 PLL/VCO Supply and Reference Board	$150.00
DC590B	Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards	$50.00