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AS3977 数据表(PDF) 1 Page - ams AG |
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AS3977 数据表(HTML) 1 Page - ams AG |
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1 / 47 page  AS3977 Multi-Channel Narrowband FSK Transmitter www.austriamicrosystems.com/AS3977 Revision 3.6 1 - 47 Data Sheet 1 General Description The AS3977 is a low-power fully integrated ETSI, FCC and ARIB compliant FSK transmitter capable of operating at any ISM frequency in the range of 300 to 928 MHz. It is based on a sigma- delta controlled fractional-N synthesizer phase locked loop (PLL) with fully integrated voltage controlled oscillator (VCO). The power amplifier (PA) output is programmable and can deliver power ranging from –20dBm up to +10dBm. An on-chip low drop-out (LDO) regulator is available in case an accurate output power independent of voltage supply variation is required. The output signal can be shaped using a programmable Gaussian filter to minimize the occupied bandwidth and adjacent channel power. The maximum data rate can be up to 100 kb/s – depending on the required filtering. The FSK frequency deviation is programmable up to a maximum of 64 kHz. The crystal oscillator can handle a wide range of frequencies. For narrow-band applications, a temperature sensor with digital read-out is included that allows compensation of the crystal frequency drift due to temperature variation. The AS3977 is connected to an external microcontroller via a bi- directional digital interface. The device operates at very low current consumption with a power supply range from 2.0V to 3.6V and can be powered down when not in use. The device is fabricated in austriamicroystems advanced 0.35µm SiGe-BiCMOS technology. 2 Key Features Fully integrated UHF transmitter Compliant to ETSI EN 300-220, FCC CFR47 part 15 and ARIB STD-T67 Multi-channel with narrow bandwidth 300 – 928 MHz operating frequency range (ISM) Filtered FSK Data rate up to 100 kb/s FSK deviation programmable up to 64kHz Extremely low power consumption Main Characteristics 2.0 – 3.6V power supply Power down current consumption 100 nA (3V, 25ºC) Output power up to +10dBm Occupied bandwidth 6 kHz (4.8 kb/s, FFSK, ARIB) -40 to 85ºC temperature range Additional Features Sigma-Delta controlled fractional-N synthesizer Resolution of synthesizer < 100Hz Fully integrated PLL Fully integrated voltage controlled oscillator (VCO) 4kV ESD protection (1.5kV for the Analog pins) 12 – 20 MHz crystal oscillator On-chip temperature sensor with digital readout for AFC pur- poses Fast frequency hopping with predefined channel selection Microcontroller clock output to save addition crystal Constant output power over battery life time Integrated Manchester coder Digital lock detector Low drop-out regulator Bi-directional serial interface Low Power Down Mode current consumption 3 Applications The AS3977 is suitable for Remote keyless entry systems, Short range radio data transmission, Domestic and consumer remote control units, Cordless alarm systems, Remote metering, and Low power telemetry. |
类似零件编号 - AS3977 |
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类似说明 - AS3977 |
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