Superhet ASK Receiver IC Captures 300 To 450 MHz

June 12, 2008

Maxim Integrated Products has unveiled the new MAX7034 low-power superheterodyne receiver for amplitude-shift-keying (ASK) applications from 300 to 450 MHz. The integrated circuit (IC) requires only a few additional components to create a complete receive-chain solution. The IC includes a low-noise amplifier (LNA), image-reject mixer, phase-locked-loop (PLL) circuitry, 10.7-MHz intermediate-frequency (IF) filter, and additional analog and baseband data-recovery circuitry. It achieves 44-dB image rejection and -114-dBm sensitivity and is ideal for applications in home security systems, remote-keyless-entry (RKE) systems, and garage-door openers.

The MAX7034 operates from a single +5-VDC supply, and draws less than 3.0 microamps of current in shutdown mode and only 6.7 mA current in receive mode. The input impedance of the LNA can be adjusted by varying the off-chip degeneration inductor, allowing it to accommodate a wide range of antenna designs. The receiver is supplied in a 28-pin TSSOP package with prices starting at $2.50 (1000 quantity).

Maxim Integrated Products

About the Author

Jack Browne

Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.