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AD6402ARS-REEL 数据表(PDF) 1 Page - Analog Devices |
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AD6402ARS-REEL 数据表(HTML) 1 Page - Analog Devices |
1 / 8 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD6402 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997 IF Transceiver Subsystem FEATURES On-Chip Regulator PLL Demodulator On-Chip VCO No Trims Excellent Sensitivity 28-Lead SSOP Package APPLICATIONS DECT/PWT/WLAN TDMA FM/FSK Systems GENERAL DESCRIPTION The AD6402 is a complete transceiver subsystem for use in high bit rate radio systems employing FM or FSK modulation. It is optimized for use in time domain multiple access (TDMA) systems with communications rates of approximately 1 MBPS. The AD6402 integrates key functions, including VCOs and a low drop-out voltage regulator. The AD6402 operates directly from an unregulated battery supply of 3.1 V to 4.5 V and pro- vides a regulated voltage output which can be used for VCO supply regulation on a companion RF chip such as the AD6401. The AD6402 transceiver consists of a mixer, integrated IF bandpass filter, IF limiter with RSSI detection, VCO, PLL demodulator and a low dropout voltage regulator. On receive, it downconverts an IF signal in the 110 MHz range to a second IF frequency, this frequency being determined by the demodu- lator reference divide ratios. It then filters, amplifies, and de- modulates this signal. The AD6402 provides a filtered baseband FUNCTIONAL BLOCK DIAGRAM PLL DEMOD 1 IF VCO VOLTAGE REGULATOR VREF MODE CONTROL DC OFFSET COMP LIMITER/FILTER 2 AD6402 RSSI CFILT DOUT DFILP PLLOUT FMMOD2 FMMOD1 IFIN TXOUT TXOUTB VCO VREG VBATT SLREF CTL1...3 MODOUT REFSEL COFF REFIN data output. On transmit, it accepts a Gaussian Frequency Shift Keying (GFSK) baseband signal, low-pass filters the signal if required using the on-chip op amp and modulates the IF VCO by varying the bias voltage on an off-chip varactor diode used in the tank circuit. The AD6402 has multiple power-down modes to maximize battery life. It operates over a temperature range of –25 °C to +85 °C and is packaged in a JEDEC standard 28-lead small- shrink outline (SSOP) surface-mount package. |
类似零件编号 - AD6402ARS-REEL |
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类似说明 - AD6402ARS-REEL |
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