AD6411

Features:

Fully Compliant with DECT Specifications
Single IC DECT Radio
Integrated UHF VCO (External Resonator)
Integrated Synthesizer Supporting Extended Frequency Allocation
Built-In Supply Regulation
Direct VCO Modulation for DECT Transmit Path
PLL-Based Demodulator
Use with Low Cost Plastic Packaged SAW Filters
Ultralow Power Design
Operates from +3.0 V to +5.5 V Battery
User-Selectable Power-Down Modes
Small 48-Lead LQFP Package


Application

DECT Cordless Telephones
DECT-Based Wireless Local Loop Systems
DECT-Based Wireless Data Systems


Pinout




Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5.5 V
Internal Power Dissipation2  . . . . . . . . . . . . . . . . . . . . 600 mW
Operating Temperature Range  . . . . . . . . . . . 25°C to +85°C
Storage Temperature Range  . . . . . . . . . . . . 65°C to +150°C
Lead Temperature, Soldering 60 sec  . . . . . . . . . . . . . .+300°C


Description

The AD6411 provides the complete transmit and receive RF signal processing necessary to implement a digital wireless transceiver based on the Digital Enhanced Cordless Telecommunications (DECT) standard. The AD6411's receive signal path consists of a mixer, IF amplifiers and PLL demodulator. The low noise, high intercept mixer is a development of the doubly-balanced Gilbert-Cell type. It has a nominal 16 dBm input-referred 1 dB compression point
and a 8 dBm input referred third-order intercept. The limiter amplifier provides sufficient gain to drive the PLL demodulator, which provides selectable analog or sliced outputs. The RSSI output provides a voltage proportional to the receive signal strength. It measures nearly 100 dB IF signal strength range with 14 mV/dB gain scaling.

The transmit path accepts baseband data, which is filtered and applied to the VCO directly. The VCO operates at half the RF carrier frequency, and is doubled to avoid pulling due to leakage from the output. An on-chip PLL frequency synthesizer provides channel selection. Operating modes are selected either through a serial bus or asynchronous control pins. This allows compatibility with most of the available DECT baseband controller ASICs. The AD6411 is packaged in a 48-lead LQFP.