Product category: Communications ICs (Wired)
News Release from: Maxim Integrated Products | Subject: MAX9989 and MAX9990
Edited by the Electronicstalk Editorial Team on 04 October 2002
Local oscillator buffers simplify
basestations
The MAX9989 and MAX9990 are the industry's first integrated +20dBm LO buffers specifically designed to meet the demanding requirements of today's wireless infrastructure applications.
The MAX9989 and MAX9990 are the industry's first integrated +20dBm LO buffers specifically designed to meet the demanding requirements of today's wireless infrastructure applications These single ICs provide +/-1dB output power variance while replacing three discrete amplifiers, a coupler, and dozens of biasing components
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
Related stories
Speedy DAC claims dynamic superiority for comms
The MAX5195 is a 14bit 260Msample/s DAC claimed to provide the world's best dynamic performance in spurious-free dynamic range, intermodulation distortion and signal to noise ratio.
This high degree of integration enables the designer to reduce the overall size of the LO drive circuitry while simultaneously cutting amplifier noise and system cost.
The MAX9989/MAX9990 are ideal for cellular/GSM/DCS/PCS and UMTS basestation applications where high-level LO drives are required for transmit and receive lineups.
Each device prevents LO pulling through the implementation of two high-isolation buffer amplifiers.
The overall cascade provides greater than 40dB of LO input-to-output isolation.
These flexible solutions are not only pin compatible, but they also allow the designer to precisely set the output power levels from +14 to +20dBm.
As an added benefit, both parts feature a buffered on-board PLL amplifier, which provides a convenient +3dBm output for prescaler feedback.
The MAX9989/MAX9990 come in pin-compatible 5 x 5mm 20-pin QFN packages that are fully qualified for direct PC board mount.
Dual output versions are also readily available in the MAX9987 and MAX9988.
Prices start at $3.50 (1000-up, FOB USA).
• Maxim Integrated Products: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
