LTC6946

LAST TIME BUY

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

Part Models
1
1ku List Price
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Part Details

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

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

Evaluation Software 1

PLLWizard

PLLWizard is used to communicate with the LTC6945 and LTC6946 synthesizers. It uses the DC590 controller to translate between USB and SPI-compatible serial communications formats. It also includes advanced PLL design and simulation capabilities which aid in loop filter design and selecting the correct SPI map register values.


Hardware Ecosystem

Parts Product Life Cycle Description
Clock Distribution Devices 1
HMC1031 LAST TIME BUY 0.1 MHz to 500 MHz Clock Generator with Integer N PLL
Clock Generation Devices 1
LTC6950 Obsolete 1.4GHz Low Phase Noise, Low Jitter PLL with Clock Distribution
High Speed Comparators (<100ns Propagation Delay) 1
LTC6957 Low Phase Noise, Dual Output Buffer/Driver/Logic Converter
I/Q Demodulators 1
LTC5585 PRODUCTION Wideband IQ Demodulator with IIP2 and DC Offset Control
Standard High Speed D/A Converters 1
LTC2000 PRODUCTION 16-/14-/11-Bit 2.5Gsps DACs
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Tools & Simulations

Linduino 3

IBIS Model 1

ADIsimPLL™

ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.

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Evaluation Kits

eval board
DC1705C-B

LTC6946-2 Demo Board | Ultralow Noise and Spurious 513MHz to 4.91GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)

Product Details

DC1705C features the LTC6946, an ultralow noise and spurious integer-N frequency synthesizer with integrated VCO. The VCO uses no external components and is internally calibrated without external system support.

There are four options of the DC1705C, one for each version of the LTC6946. Table 1 in the Demo Manual summarizes the available DC1705C options.

Each DC1705C provides 50Ω SMA connectors for the reference frequency input, fREF (REF+ IN), the reference output buffer (REF OUT), and the differential RF output (RF+ and RF–). A DC590 USB serial controller board is used for SPI communication with the LTC6946, controlled by the supplied PLLWizard software.

eval board
DC1705C-C

LTC6946-3 Demo Board | Ultralow Noise and Spurious 640MHz to 5.79GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)

Product Details

DC1705C features the LTC6946, an ultralow noise and spurious integer-N frequency synthesizer with integrated VCO. The VCO uses no external components and is internally calibrated without external system support.

There are four options of the DC1705C, one for each version of the LTC6946. Table 1 in the Demo Manual summarizes the available DC1705C options.

Each DC1705C provides 50Ω SMA connectors for the reference frequency input, fREF (REF+ IN), the reference output buffer (REF OUT), and the differential RF output (RF+ and RF–). A DC590 USB serial controller board is used for SPI communication with the LTC6946, controlled by the supplied PLLWizard software.

eval board
DC2429A

LT3042 Low Noise PLL/VCO Power Supply Board with Onboard 100MHz Reference Frequency

Product Details

Demonstration Circuit 2429A is a PLL/VCO Supply and Reference Frequency Board that features the LT3042, an ultralow noise and ultrahigh PSRR RF linear regulator. When powered from a 6V to 20V lab or wall wart supply, the DC2429A produces four ultralow noise supplies using seven LT3042s. These supplies include a fixed 3.3V/800mA supply (four LT3042's in parallel), a fixed 5V/200mA supply, a fixed 3.3V/200mA supply that powers an onboard 100MHz ultralow jitter crystal oscillator, and an adjustable voltage (2.5V to 15V), 200mA supply ideal for powering external VCOs. The DC2429 ensures PLL/VCO evaluation meets data sheet performance.


 


eval board
DC1705C-D

LTC6946-4 Demo Board | Ultralow Noise and Spurious 700MHz to 6.39GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)

Product Details

DC1705C features the LTC6946, an ultralow noise and spurious integer-N frequency synthesizer with integrated VCO. The VCO uses no external components and is internally calibrated without external system support.

There are four options of the DC1705C, one for each version of the LTC6946. Table 1 in the Demo Manual summarizes the available DC1705C options.

Each DC1705C provides 50Ω SMA connectors for the reference frequency input, fREF (REF+ IN), the reference output buffer (REF OUT), and the differential RF output (RF+ and RF–). A DC590 USB serial controller board is used for SPI communication with the LTC6946, controlled by the supplied PLLWizard software.

eval board
DC1705C-A

LTC6946-1 Demo Board | Ultralow Noise and Spurious 373MHz to 3.74GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)

Product Details

DC1705C features the LTC6946, an ultralow noise and spurious integer-N frequency synthesizer with integrated VCO. The VCO uses no external components and is internally calibrated without external system support.

There are four options of the DC1705C, one for each version of the LTC6946. Table 1 in the Demo Manual summarizes the available DC1705C options.

Each DC1705C provides 50Ω SMA connectors for the reference frequency input, fREF (REF+ IN), the reference output buffer (REF OUT), and the differential RF output (RF+ and RF–). A DC590 USB serial controller board is used for SPI communication with the LTC6946, controlled by the supplied PLLWizard software.

DC1705C-B
LTC6946-2 Demo Board | Ultralow Noise and Spurious 513MHz to 4.91GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)
DC1705C-C
LTC6946-3 Demo Board | Ultralow Noise and Spurious 640MHz to 5.79GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)
DC2429A
LT3042 Low Noise PLL/VCO Power Supply Board with Onboard 100MHz Reference Frequency
DC1705C-D
LTC6946-4 Demo Board | Ultralow Noise and Spurious 700MHz to 6.39GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)
DC1705C-A
LTC6946-1 Demo Board | Ultralow Noise and Spurious 373MHz to 3.74GHz Integer-N Synthesizer with Integrated VCO (Requires DC590 or DC2026)

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