ISL3684 ® Data Sheet PR O P R I ET A R Y March 2002 FN8001.2 Direct Down Conversion Transceiver Features The Intersil ISL3684 Wireless LAN Integrated RF Front End is part the PRISM 3, 2.4HGz 11Mbit, 802.11b compliant radio chipset. The ISL3684 interfaces directly with Intersil's ISL3871 Integrated LAN Medium Access Controller with Baseband Processor. The addition of the ISL3984 Power Amplifier and ISL3084 5GHz VCO completes the PRISM 3 LAN radio application. • Highly integrated RF to baseband solution Pinout • TX/RX switching speed . . . . . . . . . . . . . . . . . . . . . . . <1µs BB_AGC+ BB_AGC- BB_OVLD 2 1 BB_GND 7 BB_RREF QOFFSET8 3 QOFFSET+ 9 IOFFSET- PE2 10 4 MX_GND 11 IOFFSET+ MX_VCC 12 5 MX_GND 13 6 LNA_H/L 14 56 RX_I+ 16 55 RX_I- SHIELD 17 54 RX_AGC_GND LNA_IN+ 18 LNA_IN- 19 SHIELD 20 PE1 21 TX_GND 22 TX_OUT 23 TX_GND 24 TX_VCC 25 TX_BB_GND RECEIVE SECTION O TT C N HA GE EC BJ U TRANSMIT SECTION TS OU 26 PLL/SYNTHESIZER 28 41 42 CP_GND DATA SYNTH_GND SYNTH_VDD REF_IN- 40 REF_IN+ CP_DO 35 LE 39 34 QLO_VCC CP_VDD 33 LO_IN- 38 32 QLO_GND CLK 31 LO_IN+ 37 30 36 29 1 • Gain and phase balance . . . . . . . . . . . . . . . . ±0.5dB, ±2deg. • High data rate wireless LAN systems targeting IEEE802.11b standard 15 27 • Voltage gain . . . . . . . . . . . . . . . . . . . . . . -2.5dB to 88.5dB • PC card wireless LAN adapters LNA_VCC TX_AGC • Noise figure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4dB Applications LNA_GND TX_BB_VCC • Low supply operation . . . . . . . . . . . . . . . . . . . 2.7V to 3.3V • Direct simple interface to ISL3871 ISL3684 MLFP TOP VIEW P IN • Frequency of operation . . . . . . . . . . . . 2.4GHz to 2.5GHz 53 RX_AGC_VCC 52 RX_Q+ 51 RX_Q- 50 TX_I+ 49 TX_I- 48 1.2_REF 47 TX_Q+ 46 TX_Q- 45 LD 44 PRE_VDD 43 PRE_GND • Spread spectrum WLAN RF modems • TDMA or CSMA packet protocol radios • PCI wireless LAN cards • ISA, ISA PnP WLAN cards • PCN / wireless PBX / wireless local loop CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002. All Rights Reserved. PRISM® is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation. Microsoft® and Windows® are registered trademarks of Microsoft Corporation.