LMX4268 Datasheet | National Semiconductor

description The LMX4268 is a radio transceiver integrated circuit optimized for the Digital Cordless Telemunications (DCT) system. The transceiver, when bined with a power amplifier and a Tx/Rx switch, implements a plete 2.4GHz ISM band digital radio transceiver pliant with the FCC rules part 15. The LMX4268 interfaces directly to National Semiconductor’s SC144XX DCT family of baseband processors. 2.0 Features Fully integrated 2.4 GHz CMOS low-IF transceiver Low power consumption On-chip Voltage Controlled Oscillator (VCO) On-chip low noise amplifier (LNA) Open-loop modulation On chip Modulation Gain Amplifier (MGA) On-chip timing control Four digital (5 m A) output ports 0 d Bm PA driver output dual bit rate 0.576 MHz (LRb) / 1.152 MHz (HRb) sensitivity -96 d Bm (LRb) / -93 d Bm (HRb) 2.5V operation Small 44 pin Leadless Leadframe Package - - - - - - - The LMX4268 integrates a plete transmitter, consisting of a phase locked loop, VCO and PA driver. The receiver - contains LNA, quadrature downconverter, polyphase filter, - automatic gain control and demodulator. - The LMX4268 operates from a single 2.5V supply. The - LMX4268 is manufactured in National’s 0.25µm CMOS - technology, and is packaged in a 44 pin LLP package. - 3.0 Applications - (DCT) Digital Cordless Telemunications 4.0 System Diagram AGC DEMOD. BALUN LNA RSSI 0° 90° DATA MICROWIRE PA BALUN PADR X2 CLOCK LE RX DATA PORTS BIAS TX DATA R_REF © 2004 National Semiconductor Corporation .national. 5.0 Specifications 5.1 ABSOLUTE MAXIMUM RATINGS Table 1. Absolute Maximum Ratings Parameter Vddmax Power Supply Voltage (Vdd_shield, Vdd_ADC, Vdd_mix, Vdd_LNA, Vdd_ESD, Vdd_PAdr, Vdd_presc, Vdd_PLL, Vdd_VCO, Vdd_bias, Vdd_dig, Vdd_RSSI) Absolute difference between power supplies Vnmax Tstorage TLead VHBM VMM Voltage on any pin Storage Temperature Lead Temp. (solder 4 sec)3 ESD - human body model 4 ESD - machine model 4 -0.3 -40 0.3 Vdd+0.3 +150 +260 2.0 200 V V °C °C k V V Description 1,2...