ASK receiver provides high sensitivity over auto temp range

Sunnyvale, Calif.—Maxim Integrated Products has introduced the MAX7034 low-power superheterodyne receiver for ASK data in the 300MHz to 450MHz frequency range.

Only requiring a few external components to implement a complete receive-chain product, this device integrates an LNA, image-rejection mixer, self-contained PLL block, 10.7MHz IF filter with RSSI, and analog, baseband data-recovery circuitry. To ensure high receive sensitivity in automotive and consumer applications, these critical blocks have been designed to withstand high temperatures.

Providing high, -114dBm sensitivity and 44dB of image rejection, the MAX7034 is suitable for applications such as remote keyless-entry systems, car alarms, home security systems, remote controls, and garage door openers.

The architecture simplifies implementation in any 300MHz to 450MHz RF system. 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. To further enhance flexibility, the center frequency of the fully-differential, image-rejection mixer can be set to 315MHz, 375MHz, or 433MHz.

The MAX7034 operates from a single 5V supply, and draws less than 3.0 microamps in shutdown mode and only 6.7mA in receive mode. Fully specified over the -40°C to +125°C automotive temperature range, it is available in a 28-pin TSSOP package.

Pricing: Starts at $2.50 (1000-up, FOB USA).
Availability: Now.
Datasheet: Click here.

Maxim Integrated Products,

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