The XR-2211A is a monolithic phase-locked loop (PLL) system especially designed for data communications applications. It is particularly suited for FSK modem applications. It operates over a wide supply voltage range of 4.5 to 20V and a wide frequency range of 0.01Hz to 300kHz. It can accommodate analog signals between 10mV and 3V, and can interface with conventional DTL, TTL, and ECL logic families. The circuit consists of a basic PLL for tracking an input signal within the pass band, a quadrature phase detector which provides carrier detection, and an FSK voltage comparator which provides FSK demodulation. External components are used to independently set center frequency, bandwidth, and output delay. An internal voltage reference proportional to the power supply is provided at an output pin. The XR-2211A is available in 14 pin packages specified for
The XR-2211A is a monolithic phase‑locked loop (PLL) system designed for data‑communications applications, especially FSK modem use. It operates from 4.5 V to 20 V supply and covers a frequency range of 0.01 Hz to 300 kHz, handling analog signals from 10 mV to 3 V rms and interfacing with DTL, TTL, and ECL logic families.
Key features include FSK demodulation with carrier detection, tone decoding, wide dynamic range, and adjustable tracking. The device is offered in 14‑lead PDIP and SOIC packages, with detailed pin descriptions, electrical characteristics, and design equations provided for system integration.
| Supply Voltage Range | 4.5 V to 20 V |
|---|---|
| Supply Current | 5 mA to 9 mA |
| Frequency Range | 0.01 Hz to 300 kHz |
| Temperature Stability | 100 ppm/°C (typ.) |
| Input Impedance | 20 kΩ |
| Output Low Voltage | 300 mV to 500 mV |
| Recommended Input Signal Level | 10 mV rms to 3 V rms |
The device operates from 4.5 V up to 20 V.
It accepts analog input signals between 10 mV rms and 3 V rms.
The XR-2211A works from 0.01 Hz up to 300 kHz.
Typical temperature stability is 100 ppm per degree Celsius.