Product category:
Communications ICs (Wired)
News Release from: National Semiconductor | Subject: LMX243x PLLatinum PLLs
Edited by the Electronicstalk Editorial
Team on 11 June 2003
Frugal operation for high-frequency PLLs
LMX243x PLLatinum PLLs offer the lowest power consumption in the industry for PLLs operating over 3GHz and are well suited for wireless LAN, cordless phone, WLL and basestation applications.
National Semiconductor has released its first products for the high-frequency phase lock loop (PLL) market, the LMX243x family of PLLatinum PLLs These high-performance PLLs offer the lowest power consumption in the industry for PLLs operating over 3GHz and are well suited for wireless LAN, 5.8GHz cordless phone, WLL and basestation applications
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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The first products from the new family are the LMX2430, LMX2433 and LMX2434 PLLs, all available now.
Additional members of the family will be introduced throughout the year.
In addition to low power consumption, these new high-frequency PLLs feature the lowest normalised phase noise contribution in their class, -219.0dBc/Hz.
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"With the introduction of the LMX243x family, National's PLLatinum PLL product offerings span the entire market from the current generation cordless and mobile air interface standards to new high frequency cordless, infrastructure and WLAN applications", said Armin Konrad, Technical Marketing Engineer Wireless, Europe.
"With their low power consumption and high performance, the LMX243x PLLs are ideal for both mobile and fixed radio applications, and also complement National's recently introduced PLLatinum LMX25xx PLL+VCO and LMX247x delta-sigma PLL families".
The LMX2434 PLL has an operating frequency of 5.0GHz RF with 2.5GHz IF, eliminating the need for frequency multiplication in 5GHz ISM band applications and reducing the system noise caused by frequency multiplication.
The LMX2434 also has a low power supply current of only 7.0mA, providing longer battery life for mobile radio applications such as 5.8GHz cordless phones.
The LMX2433 PLL has an operating frequency of 3.6GHz RF with 1.7GHz IF and a low power supply current of 5.2mA.
The LMX2430 PLL operates at 3.0GHz RF with 800MHz IF and has ultralow current consumption of 4.2mA.
All three PLLs feature 2.25 to 2.75V operation, selectable synchronous or asynchronous power down mode, programmable charge pump current levels of 1 or 4mA, Fastlock technology with integrated timeout counters, digital filtered lock detect output and 1.8V Microwire logic interface.
The LMX2434 has a selectable dual modulus prescaler of 16/17 or 32/33, whereas the LMX2433 and LMX2430 have prescaler options of 8/9 or 16/17.
All three PLLs are available in 20-pin 3.5 x 3.5 x 0.6mm ultrathin chip-scale packages or standard 20-pin TSSOPs.
The LMX2430, LMX2433 and LMX2434 are available now for $1.85, $1.92 and $2.01, respectively, in 1000-off quantities.
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