Fast ADC teams with 15 GHz PLL

-June 07, 2017

Texas Instruments’ ADC12DJ3200 12 bit ADC delivers speeds of up to 6.4 Gsamples/s in single-channel mode and up to 3.2 Gsamples/s in dual-channel mode. A companion wideband PLL with an integrated VCO, the LMX2594 generates frequencies of up to 15 GHz without using an internal frequency doubler. Together, these devices can simplify the clocking architecture, synchronization, and data capture of JESD204B-compliant designs, including large phased-array radar systems and 5G wireless testers.

Offering direct RF sampling up to 10 GHz, covering the L band, S band, and C band and extending into the X band, the ADC12DJ3200 provides enhanced frequency agility, while reducing filter complexity. The 10×10-mm converter integrates an entire RF-to-bits receiver, decreasing board space and simplifying system architecture.

The LMX2594 RF PLL provides one of the lowest normalized PLL noise floors at -236 dBc/Hz and 1/f of -129 dBc/Hz. With its integrated VCO operating at up to 15 GHz, the device eliminates the need for complex onboard filters to remove subharmonics. In addition, the LMX2594 can automatically generate up to two segments of a frequency ramp.

Sampling now through TI.com and authorized distributors, the ADC12DJ3200 converter comes in a flip-chip BGA package and costs $1920 each in lots of 100 units. The LMX2594 is available now in a VQFN package and sells for $41 each in lots of 1000 units.

ADC12DJ3200 product page
LMX2594 product page

Texas Instruments, www.ti.com

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