The ADF7021-V is a high performance, low power, narrow-band RF transceiver based on the ADF7021-N. The architecture of the ADF7021-V transceiver is similar to that of the ADF7021-N except that an external VCO is used by the on-chip RF synthesizer for applications that require improved phase noise performance. The ADF7021-V is designed to operate in both the license-free ISM bands and in the licensed bands from 80 MHz to 960 MHz. To minimize RF feedthrough and spurious emissions, the external VCO operates at 2× or 4× the desired RF frequency; the ADF7021-V supports a maximum VCO frequency operation of 1920 MHz. The 4× VCO operation is programmable by enabling an additional on-chip divide-by-2 outside the RF synthesizer loop and offers improved phase noise performance. As with the ADF7021-N receiver, the IF filter bandwidths of 9 kHz, 13.5 kHz, and 18.5 kHz are supported, making the ADF7021-V ideally suited to worldwide narrow-band telemetry applications. The part has both Gaussian and raised cosine transmit data filtering options to improve spectral efficiency for narrow-band applications. It is suitable for circuit applications targeted at the following: * European ETSI EN 300 220 * North American FCC Part 15, Part 90, and Part 95 * Japanese ARIB STD-T67 * Korean short-range device regulations * Chinese short-range device regulations A complete transceiver can be built using a small number of discrete external components, making the ADF7021-V very suitable for area-sensitive, high performance driven applications. See data sheet for more information. APPLICATIONS * Narrow-band, short range device (SRD) standards ETSI EN 300 220 FCC Part 90 (meets Emission Mask D requirements) FCC Part 95 ARIB STD-T67 * Wireless Metering * Narrow-band wireless telemetry * High performance, low power, narrow-band transceiver * Enhanced performance ADF7021-N with external VCO * Frequency bands using external VCO: 80 MHz to 960 MHz * Improved adjacent channel power (ACP) and adjacent channel rejection (ACR) compared with the ADF7021-N https://elecena.pl/product/1115854/high-performance-narrow-band-transceiver-ic 2010-07-28 https://elecena.pl/product/1115854/high-performance-narrow-band-transceiver-ic 2018-03-28 https://elecena.pl/product/1115854/high-performance-narrow-band-transceiver-ic 2025-01-18