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LTC5531 Datasheet(PDF) 1 Page - Linear Technology |
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LTC5531 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LTC5531 1 5531f APPLICATIO S FEATURES TYPICAL APPLICATIO DESCRIPTIO s 802.11a, 802.11b, 802.11g, 802.15, 802.16 s Multimode Mobile Phone Products s Optical Data Links s Wireless Data Modems s Wireless and Cable Infrastructure s RF Power Alarm s Envelope Detector s Temperature Compensated Internal Schottky Diode RF Detector s Wide Input Frequency Range: 300MHz to 7GHz* s Wide Input Power Range: –32dBm to 10dBm s Buffered Detector Output s Precision VOUT Offset Control s Wide VCC Range of 2.7V to 6V s Low Operating Current: 500 µA s Low Shutdown Current: <2 µA s Available in a Low Profile (1mm) SOT-23 Package Precision 300MHz to 7GHz RF Detector with Shutdown and Offset Adjustment The LTC ®5531 is an RF power detector for RF applications operating in the 300MHz to 7GHz range. A temperature compensated Schottky diode peak detector and buffer amplifier are combined in a small ThinSOT TM package. The supply voltage range is optimized for operation from a single lithium-ion cell or 3xNiMH. The RF input voltage is peak detected using an on-chip Schottky diode. The detected voltage is buffered and supplied to the VOUT pin. A power saving shutdown mode reduces current to less than 2 µA. The initial offset voltage of 120mV ±35mV can be precisely adjusted using the VOS pin. The LTC5531 operates with input power levels from –32dBm to 10dBm. , LTC and LT are registered trademarks of Linear Technology Corporation. 300MHz to 7GHz RF Power Detector LTC5531 1 2 3 6 5 4 100pF 0.1 µF VCC VOS REFERENCE VCC VOUT RFIN GND SHDN 33pF 5531 TA01 RF INPUT VOS DISABLE ENABLE VOUT Output Voltage vs RF Input Power 3600 3200 2800 2400 2000 1600 1200 800 400 0 RF INPUT POWER (dBm) 5531 TA02 –30 –26 –22 –18 –14 –10 –6 –2 2 6 10 VOS = 0V VCC = 3.6V TA = 25°C 7000MHz 300MHz 6000MHz 5000MHz 1000MHz 2000MHz 3000MHz 4000MHz ThinSOT is a trademark of Linear Technology Corporation. *Higher frequency operation is achievable with reduced performance. Consult factory for more information. |
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