Maxim's First Fully Integrated, Two-Chip Radio Solution is Spec-Compliant for TD-SCDMA Cellular Phones.

SUNNYVALE, Calif. -- Note to Editor: This TD-SCDMA chipset is the world's first and only two-chip solution for the domestic Chinese TD-SCDMA market. The MAX2392 is industry's first direct-conversion receiver for TD-SCDMA. The MAX2507 is the first production-ready, fully spec-compliant, SiGe transmit IC to include a power amplifier and meet the tough cellular performance requirements for any cellular phone standard. The devices are being referenced in most TD-SCDMA designs today. The MAX19700 family of baseband data converters completes the chipset for customers who do not have the baseband data conversion integrated onto their baseband processor of choice.

Maxim Integrated Products (Nasdaq:MXIM) introduces the MAX2392 and MAX2507(a), RF to baseband TD-SCDMA radio-solution reference designs. These devices are the most integrated solution available for TD-SCDMA cellular handsets and data card applications.

Market Demands

Ever since their introduction to the marketplace, cellular phones have constantly been targeted for size and cost reduction by their manufacturers and design engineers. With the MAX2392 and MAX2507, Maxim is the first and only company to make a two-chip radio solution a reality for the TD-SCDMA market. The Maxim approach now makes a small-form-factor possible, while superheterodyne and even conventional direct-conversion solutions never could. "We are extremely proud to maintain Maxim's leadership role in TD-SCDMA through this solution," Hans Dropmann, Director, Business Management for Wireless Products, commented. Dropmann continued that, "The TD-SCDMA chipset represents the latest achievement in Maxim's long-standing commitment to anticipate and exceed the demands of the wireless and the cellular IC market."

Choice of Interfaces

Available as an analog or digital interface, each reference design encompasses the entire functionality of the radio -- from antenna to baseband. A100-pin connector lets the radio interface with, and be controlled by, a PC or baseband emulator. Easy-to-use software exercises the chipset through all its operating modes. Focusing on the benefits of this new integrated design, Dropmann explained that, "It is our goal to ensure our customers' success by not only offering them state-of-the-art IC solutions, but also by reducing the amount of engineering effort needed to make the radio spec compliant in the end application."

The Analog Reference Design

Maxim's new analog interface reference design features the company's unique and feature-packed Zero-IF radio solution, comprised of the space-saving MAX2392 receiver and the MAX2507 transmitter plus power amplifier. Both parts are manufactured using the company's state-of-the-art SiGe BiCMOS technology and are being referenced in most TD-SCDMA designs today. As industry's first direct-conversion receiver for TD-SCDMA, the MAX2392 receiver includes RF LNA, direct conversion mixers, baseband filters for TD-SCDMA channel filtering, and AGC amplifiers. The chip also integrates a VCO and synthesizer. This single device reduces cost, size, and component count by at least 50% when compared to a superheterodyne implementation.

The MAX2507 transmitter is the first production-ready, fully spec compliant, SiGe transmit IC to include not only the power amplifier, but also the entire transmit circuitry required for a high-dynamic-range CDMA system without needing external power-control circuitry. This IC accepts baseband inputs and upconverts them to the RF frequency using on-chip frequency translators, VCO, and synthesizers. All this integration results in approximately 40% size reduction compared to other competitive solutions. The MAX2507 is also the first IC with integrated PA to meet the tough cellular performance requirements for the TD-SCDMA or any cellular phone standard.

The Digital Interface Reference Design

For customers who do not have the baseband data conversion integrated onto their chosen baseband processor, Maxim offers a Digital Interface Reference design that includes a third chip, the MAX19700. The MAX19700 family of baseband converters is an ultra-low-power, mixed-signal analog front-end (AFE) designed for TD-SCDMA handsets and data cards. Optimized for high dynamic performance at ultra-low power, the MAX19700 integrates an impressive array of complex components unmatched by competitive solutions: a dual 10-bit, 11Msps receive ADC and dual 10-bit, 11Msps transmit DAC with TD-SCDMA low-pass Tx filters. Typical operating power is 38mW at Fclk = 5.12Msps with AVDD = +3V and OVDD = +1.8V. The device also integrates three 12-bit control DACs for fast level-setting AGC, VGA, and AFC.

Available for Immediate Design

"Samples for all the above devices are available today and production release for all devices will be complete by Spring of 2005," Dropmann explained. "We are pleased to contribute so significantly to advancing this important technology," he concluded.

The MAX2392 is packaged in a 28-pin leadless thin QFN that measures only 5mm x 5mm. The MAX2507 is packaged in a 48-pin leadless LGA that measures only 7mm x 7mm. The MAX19700 is packaged in a 48-pin leadless thin QFN that measures only 7mm x 7mm. For more information, please visit http://www.maxim-ic.com/TD-SCDMA.

Maxim Integrated Products is a leading international supplier of quality analog and mixed-signal products for applications that require real world signal processing. For more information, contact Maxim at 120 San Gabriel Dr., Sunnyvale, CA 94086. Telephone: [phone] or our URL: www.maxim-ic.com.

DATA SHEET: A preliminary Data Sheet for this product is available on the web. http://www.maxim-ic.com/MAX2392

GRAPHIC: The graphic for this product is available on the web in three formats:

PREVIEW image (smaller image to view in Navigator or Explorer):

http://www.maxim-ic.com/PRGraphics/images/PR2392.jpg

JPEG (300 dpi, high quality, RGB color)

http://www.maxim-ic.com/PRGraphics/images/2392.jpg

TIFF (300 dpi uncompressed CMYK TIF, in a .ZIP archive(a))

http://www.maxim-ic.com/PRGraphics/images/2392-cmyk-tif.zip

(Use Winzip, StuffIt Expander or similar de-archive utility to access the .ZIP file)

(a) Future product -- contact factory for availability.