3.5GHz, SiGe ACTIVE MIXERS DELIVER +11dBm IP3 PERFORMANCE
Note to Editors: Until now, high IP3 mixers have been implemented by expensive and space-hungry passive mixers. The MAX2683/MAX2684 are the first active mixers on the market to feature high IP3 performance (+11dBm), reducing cost by 40% and board space by 80%.
SUNNYVALE, CA—February 15, 2000—Maxim Integrated Products introduces the MAX2683/MAX2684 3.5GHz SiGe active mixers, the industry’s first to deliver high IP3 performance. At +11dBm IP3 at 3.5GHz, they are 10dB higher than other active mixers on the market. The IP3 is also user-programmable via a bias resistor, allowing the minimum IP3 performance to be set without wasting supply current. An on-chip LO buffer and filter result in 37dB isolation between the LO and RF ports20dB better than passive mixer designs. The improved isolation helps to reduce front-end filter complexity and cost. These mixers are ideal for applications in wireless local loop, wireless broadband access, and digital microwave radios.
Both devices operate at an RF input frequency from 3.4GHz to 3.8GHz. The MAX2683 output IF frequency ranges from 100MHz to 400MHz, and the MAX2684 IF frequency ranges from 800MHz to 1000MHz. At 3.5GHz, the conversion gain is 6dB for the MAX2683 and 1dB for the MAX2684. The LO input can be injected at full or half frequency. With the half-frequency input, a logic-enabled frequency doubler increases the LO signal to full frequency. An internal LO filter reduces LO harmonics and mixer spurious products. The devices operate from a single +2.7 to +5.5V supply. Both are available in the 16-pin TSSOP package with an exposed paddle for optimum performance at 3.5GHz.
Prices starts from $1.90 (1000-up, FOB USA). A fully assembled evaluation kit (MAX2683/MAX2684EVKIT) is available to help reduce design time.
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