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Maxim Delivers First RF Transceiver With Antenna Diversity Switches
Embarking as the industry's first transceiver to integrate Rx/Tx and antenna diversity switches, the MAX2830 direct-conversion, 802.11g/b RF transceiver also squeezes in a power amplifier and crystal oscillator circuitry. Saving 10 mm x 10 mm of board space, the device is a viable candidate for Wi-Fi, PDA, VoIP, and cellular handset applications. The transceiver operates from a 2.7V to 3.6V supply and the power amp from 2.7V to 4.2V. The receiver consumes 62 mA in receive mode while achieving a noise figure of 3.3 dB, enabling a receive sensitivity of –75 dBm (64QAM OFDM) without an external low-noise amp. Additionally, the transmitter and power amp deliver a linear transmit power of +17 dBm (64QAM OFDM) after the switch. A 20 mA shutdown mode is also on chip. Available in a leadless, 48-pin 7 mm x 7 mm TQFN-EP, pricing starts at $5.97 each/1,000. MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.
Source: http://www.eepn.com/locator/products...313/35313.html
Bạn nào biết cách xin sample của Maxim thì xin vài con về dùng:
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5367
Key Features
* 2.4GHz to 2.5GHz ISM Band Operation
* IEEE 802.11g/b Compatible (54Mbps OFDM and 11Mbps CCK)
* Complete RF Transceiver, PA, Rx/Tx and Antenna Diversity Switch, and Crystal Oscillator
o Best-in-Class Transceiver Performance
o 62mA Receiver Current
o 3.3dB Rx Noise Figure
o -75dBm Rx Sensitivity (54Mbps OFDM)
o No I/Q Calibration Required
o 0.1dB/0.35° Rx I/Q Gain/Phase Imbalance
o 33dB RF and 62dB Baseband Gain Control Range
o 60dB Range Analog RSSI per RF Gain Setting
o Fast Rx I/Q DC-Offset Settling
o Programmable Baseband Lowpass Filter
o 20-Bit Sigma-Delta Fractional-N PLL with < 20Hz Step Size
o Digitally Tuned Crystal Oscillator
o +17.1dBm Transmit Power (5.6% EVM with 54Mbps OFDM)
o 31dB Tx Gain Control Range
o Integrated Power Detector
o Fully Integrated RF Input and Output Matching and DC Blocking
o Serial or Parallel Gain-Control Interface
o > 40dB Tx Sideband Suppression Without Calibration
o Rx/Tx I/Q Error Detection
* Transceiver Operates from +2.7V to +3.6V
* PA Operates from +2.7V to +4.2V
* Low-Power Shutdown Mode
* Small 48-Pin Thin QFN Package (7mm x 7mm x 0.8mm)
Applications
General 2.4GHz ISM Radios
Wi-Fi, PDA, VoIP, and Cellular Handsets
Wireless Speakers and Headphones
Embarking as the industry's first transceiver to integrate Rx/Tx and antenna diversity switches, the MAX2830 direct-conversion, 802.11g/b RF transceiver also squeezes in a power amplifier and crystal oscillator circuitry. Saving 10 mm x 10 mm of board space, the device is a viable candidate for Wi-Fi, PDA, VoIP, and cellular handset applications. The transceiver operates from a 2.7V to 3.6V supply and the power amp from 2.7V to 4.2V. The receiver consumes 62 mA in receive mode while achieving a noise figure of 3.3 dB, enabling a receive sensitivity of –75 dBm (64QAM OFDM) without an external low-noise amp. Additionally, the transmitter and power amp deliver a linear transmit power of +17 dBm (64QAM OFDM) after the switch. A 20 mA shutdown mode is also on chip. Available in a leadless, 48-pin 7 mm x 7 mm TQFN-EP, pricing starts at $5.97 each/1,000. MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.
Source: http://www.eepn.com/locator/products...313/35313.html
Bạn nào biết cách xin sample của Maxim thì xin vài con về dùng:
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5367
Key Features
* 2.4GHz to 2.5GHz ISM Band Operation
* IEEE 802.11g/b Compatible (54Mbps OFDM and 11Mbps CCK)
* Complete RF Transceiver, PA, Rx/Tx and Antenna Diversity Switch, and Crystal Oscillator
o Best-in-Class Transceiver Performance
o 62mA Receiver Current
o 3.3dB Rx Noise Figure
o -75dBm Rx Sensitivity (54Mbps OFDM)
o No I/Q Calibration Required
o 0.1dB/0.35° Rx I/Q Gain/Phase Imbalance
o 33dB RF and 62dB Baseband Gain Control Range
o 60dB Range Analog RSSI per RF Gain Setting
o Fast Rx I/Q DC-Offset Settling
o Programmable Baseband Lowpass Filter
o 20-Bit Sigma-Delta Fractional-N PLL with < 20Hz Step Size
o Digitally Tuned Crystal Oscillator
o +17.1dBm Transmit Power (5.6% EVM with 54Mbps OFDM)
o 31dB Tx Gain Control Range
o Integrated Power Detector
o Fully Integrated RF Input and Output Matching and DC Blocking
o Serial or Parallel Gain-Control Interface
o > 40dB Tx Sideband Suppression Without Calibration
o Rx/Tx I/Q Error Detection
* Transceiver Operates from +2.7V to +3.6V
* PA Operates from +2.7V to +4.2V
* Low-Power Shutdown Mode
* Small 48-Pin Thin QFN Package (7mm x 7mm x 0.8mm)
Applications
General 2.4GHz ISM Radios
Wi-Fi, PDA, VoIP, and Cellular Handsets
Wireless Speakers and Headphones
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