XR-2211A FSK Demodulator/ TM Tone Decoder ...the analog plus company June 19973 FEATURES APPLICATIONS Wide Frequency Range, 0.01Hz to 300kHz Caller Identification Delivery Wide Supply Voltage Range, 4.5V to 20V FSK Demodulation HCMOS/TTL/Logic Compatibility Data Synchronization FSK Demodulation, with Carrier Detection Tone Decoding Wide Dynamic Range, 10mV to 3V rms FM Detection Adjustable Tracking Range (+1% to 80%) Excellent Temp. Stability, 100 ppm/C, typ. Carrier Detection GENERAL DESCRIPTION quadrature phase detector which provides carrier The XR-2211A is a monolithic phase-locked loop (PLL) detection, and an FSK voltage comparator which provides system especially designed for data communications FSK demodulation. External components are used to applications. It is particularly suited for FSK modem independently set center frequency, bandwidth, and output applications. It operates over a wide supply voltage range delay. An internal voltage reference proportional to the of 4.5 to 20V and a wide frequency range of 0.01Hz to power supply is provided at an output pin. 300kHz. It can accommodate analog signals between The XR-2211A is available in 14 pin packages specified 10mV and 3V, and can interface with conventional DTL, for commercial temperature ranges. TTL, and ECL logic families. The circuit consists of a basic PLL for tracking an input signal within the pass band, a ORDERING INFORMATION Operating Part No. Package Temperature Range XR-2211ACP 14 Lead PDIP (0.300) 0C to +70C XR-2211ACD 14 Lead SOIC (Jedec, 0.150) 0C to +70C Rev. 1.04 1995 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017 1XR-2211A BLOCK DIAGRAM V GND NC CC 1 4 9 Pre Amplifier 11 LDO INP 2 Loop 3 LDF -Det TIM C1 14 Lock Detect Comparator 6 LDOQ VCO 13 TIM C2 Quad 5 LDOQN -Det TIM R 12 Internal 10 V V REF REF 7 DO FSK Comp Reference COMP I 8 Figure 1. XR-2211A Block Diagram Rev. 1.04 2