Part Number : AR9287
Function : Single-Chip 2×2 MIMO MAC/BB/Radio
Manufactures : Atheros
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Description :
Data Sheet February 2010 AR9287 Single-Chip 2×2 MIMO MAC/BB/Radio with PCIE Interface for 802.11n 2.4 GHz WLANs General Description The Atheros AR9287 is a highly integrated single-chip solution for 2.4 GHz 802.11n-ready WLANs to enable high-performance 2×2 MIMO configurations for applications demanding robust link quality and maximum throughput and range. The AR9287 integrates a multiprotocol MAC, baseband processor, analog-todigital and digital-to-analog (ADC/DAC) converters, 2×2 MIMO radio transceiver including LNA, PA, and RF switch, and PCI Express interface in an all-CMOS device for low power and small form factor applications. The AR9287 implements half-duplex OFDM, CCK, and DSSS baseband processing, supporting up to 150 Mbps for 20 MHz and 300 Mbps for 40 MHz channel operations respectively, and IEEE 802.11b/g data rates. Additional features include signal detection, automatic gain control, frequency offset estimation, symbol timing, and channel estimation. The AR9287 MAC supports the 802.11 wireless MAC protocol, 802.11i security, receive and transmit filtering, error recovery, and quality of service (QoS). The AR9287 supports two simultaneous traffic streams using up to two integrated transmit chains and receive chains for high throughput and range performance. Transmit chains combine baseband in-phase (I) and quadrature (Q) signals, convert them to the desired frequency, and drive the RF signal to multiple antennas. Receive chains convert RF signal to baseband I and Q outputs. The frequency synthesizer supports one-MHz steps to match frequencies defined by IEEE 802.11b/g/n specifications. The AR9287 supports frame data transfer to and from the host using a PCIE interface providing interrupt generation and reporting, power save, and status reporting. Other external interfaces include serial EEPROM and GPIOs. The AR9287 operates with standard legacy 802.11b/g devices. Features ■ All-CMOS MIMO solution interoperable with IEEE 802.11b/g/n WLANs ■ 2×2 MIMO technology improves effective throughput and range over existing 802.11b/g products ■ Integrated LNAs, PAs, and RF switches eliminate the need for external front-end modules ■ Supports spatial multiplexing, cyclic-delay diversity (CDD), and maximal ratio combining (MRC) ■ 2.4 GHz WLAN MAC/BB processing ■ BPSK, QPSK, 16 QAM, 64 QAM, DBPSK, DQPSK, and CCK modulation schemes ■ Data rates of up to 150 Mbps for 20 MHz channels and 300 Mbps for 40 MHz channels ■ Wireless multimedia enhancements for QoS ■ 802.11e-compatible bursting ■ Support for IEEE 802.11e, h, and i standards ■ WEP, TKIP, and AES hardware encryption ■ 20 and 40 MHz channelization ■ PCIE 1.1 compliant ■ Support for 2–3 wire Bluetooth coexistence ■ Reduced (short) guard interval ■ Frame aggregation ■ Block ACK ■ IEEE 1149.1 standard test access port and boundary scan architecture supported ■ 9 mm x 9 mm 76-pin LPCC package AR9287 System Block Diagram © 2009-2010 by Atheros Communica […]
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