Description

The PT***1 is a very low power and highly sensitive single chip OOK/ASK super-heterodyne receiver for the **5MHz and **4MHz frequency bands that offers a high level of integration and requires only a few external components. The PT***1 consists of a low-noise amplifier (LNA), an image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO) and loop filter, a *0.7MHz intermediate frequency (IF) limiting amplifier stage with received-signal-strength indicator (RSSI), and analog baseband data recovery circuitry (data filter, peak detector, and data slicer). The PT***1 also implements a discrete one-step automatic gain control (AGC) that reduces the LNA gain by *0dB when the RF input signal is greater than **7dBm. The PT***1 is available in a **-pin SSOP package. FEATURES • Low current consumption (5mA fully active mode at **5MHz) • 2.4V to 5.5V supply voltage operation range • Optimized for **5MHz or **4MHz ISM Band • On-chip image-rejection function • High dynamic range with on-chip AGC • Low power down mode current (<1Î&frac*4;A) • High sensitivity of ***4dBm (**5MHz, 2Kb/s AM *9% square-wave modulation) • **-pin SSOP package