Product category:
Communications ICs (Wireless)
News Release from: Linear Technology Corp | Subject: LT5527
Edited by the Electronicstalk Editorial
Team on 28 June 2005
RF mixer cuts the cost of 3G
basestations
A new high linearity active downconverting RF mixer significantly reduces the cost and simplifies design of 3G cellular basestations.
A new high linearity active downconverting RF mixer from Linear Technology significantly reduces the cost and simplifies design of 3G cellular basestations The LT5527 RF mixer features an operating frequency range extending to 3.7GHz
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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RF mixers take transformers onboard
Linear Technology has released two new high linearity up-converting RF active mixers with integrated RF transformers.
At 1.9GHz, the LT5527 offers IIP3 (input 3rd order intercept point) linearity of 23.5dBm, conversion gain of 2.3dB, and a noise figure of 12.5dB, meeting the dynamic range requirements of 3G cellular basestations and other high performance wireless infrastructure receivers.
The LT5527's local oscillator and RF inputs operate single-ended and have built-in 50ohm impedance, requiring few external matching components, reducing basestation cost and design time.
Moreover, the LT5527 incorporates a low noise LO buffer, allowing operation at a -3dBm LO drive level, resolving the challenges of RF isolation and reducing the need for external filtering.
The LT5527 operates over a wide frequency range from 400MHz to 3.7GHz, covering the 850MHz cellular band, the 1.9 and 2.1GHz W-CDMA and UMTS bands, as well other high performance wireless applications that operate in bands at 450MHz, 2.4GHz and 3.5GHz.
The LT5527 features on-chip RF transformers at both the RF and LO inputs.
The transformers facilitate 50ohm impedance matching and allow these inputs to operate single-ended, simplifying product development and speeding time to market.
The LT5527 operates from a single 5V supply voltage.
Typical operating current is 78mA.
The device can be shutdown by an enable pin.
When disabled, the chip draws 100uA maximum quiescent current to conserve power.
The LT5527 is offered in a 16-pin 4 x 4mm surface mount QFN package.
It is priced at $5.80 each in 1000-piece quantities, and is available from stock. Request a free brochure from Linear Technology Corp ...
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