Radio IC provides mixed-signal half of 900-MHz cordless phone. (Analog Devices Inc.'s new AD6190 radio integrated circuit device)(Leading Edge: What's Hot In the Design Community)

EDN, October, 1997 by Schewer, Bill

Although 2.4-GHz industrial, scientific, and medical (ISM) applications and cellular phones get headlines, there's lots of design-in activity for 900-MHz devices, especially cordless phones and wireless data systems. The AD6190 radio IC from Analog Devices works with the Zilog (Santa Clara, CA) Z87L00 frequency-hopping controller to provide nearly all the RF and IF functions for a 902- to 928-MHz, ISM-band, spread-spectrum phone.

The 28-pin SSOP IC includes a low-noise amplifier; receiver and transmitter mixers; a VCO; a prescaler; and a limiter amplifier with a received-signal-strength indictor. You provide an external 15-MHz PLL synthesizer. The low-noise-amplifier front end and associated circuitry provide a total gain of 22 dB with a 4.2-dB typical noise...

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