ATR3515

Features Frequency Range 4.9 GHz to 5.9 GHz Supply-voltage 2.7 V to 3.6 V 3.5% EVM at 19 dBm Output Power at 54 Mbit/s OFDM 25.5 dBm P1dB On-chip Power Detector with 25 dBm Dynamic Range Power-down Mode and Biasing Control Low Profile Lead-free Plastic Package QFN16 (4 × 4 × 0.9 mm) Applications IEEE 802.11a OFDM WLAN Hiperlan2 WLAN PC Cards, PCMCIA 5 GHz ISM Band Application Electrostatic sensitive device. Observe precautions for handling. 5-GHz WLAN Power Amplifier for 802.11a ATR3515 Description Preliminary Process The 5-GHz power amplifier is designed in Atmel’s advanced Silicon-Germanium (SiGe) process and provides excellent linearity and noise performance as well as good power-added efficiency. Circuitry The PA consists of a two-stage amplifier with a P1db of 25.5 dBm. The output stage was realized using an open-collector structure. Power-up/down and output level are controlled at bias control pin 6 (VCTL). An on-chip power detector provides a voltage proportional to the output power. Figure 1. Block Diagram VCC1 15 ATR3515 RFIN 3 Matching VCC2 13 RFOUT 11 RFOUT 10 Bias control Power Detector 6 VCTL 16 VCC_CTL 7 VDET_OUT Rev. 4514I–WLAN–07/04 Pin Configuration Figure 2. Pinning QFN16 VCC_CTL VCC1 GND VCC2 GND NC RFIN GND 16 15 14 13 1 12 2 ATR3515 11 3 GND on the 10 4 Paddel 9 5678 GND RFOUT RFOUT GND GND VCTL VDET_OUT GND Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Paddel Symbol GND NC RFIN GND GND VCTL VDE...