LTC5508 Datasheet | Linear Technology

LTC5508 300MHz to 7GHz RF Power Detector with Buffered Output in SC70 Package Features s s s s s s s s DESCRIPTIO Temperature pensated Internal Schottky Diode RF Detector Wide Input Frequency Range: 300MHz to 7GHz Wide Input Power Range: - 32d Bm to 12d Bm Buffered Detector Output Wide VCC Range of 2.7V to 6V Low Operating Current: 550µA Low Shutdown Current: <2µA SC70 Package The LTC®5508 is an RF power detector for RF applications operating in the 300MHz to 7GHz range. A temperature pensated Schottky diode peak detector and buffer amplifier are bined in a small SC70 package. The supply voltage range is optimized for operation from a single lithium-ion cell or 3x Ni MH. 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 supply current to less than 2µA. The LTC5508 operates with input power levels from - 32d Bm to 12d Bm. , LTC and LT are registered trademarks of Linear Technology Corporation. U APPLICATIO S s s s s s s s 802.11a, 802.11b, 802.11g, 802.15 Multimode Mobile Phone Products Optical Data Links Wireless Data Modems Wireless and Cable Infrastructure RF Power Alarm Envelope Detector TYPICAL APPLICATIO Output Voltage vs RF Input Power 10000 VCC = 3.6V TA = 25°C RF INPUT 33p F 6 2 LTC5508 VCC 4 RFIN GND SHDN GND 5 100p F VCC 0.1µF VOUT OUTPUT VOLTAGE (m V) 300MHz to 7GHz RF Power Detector 1000 2GHz 1GHz 4GHz 6GHz 7GHz DISABLE ENABLE VOUT 3 VOUT 5508 TA01 - 32 - 28 - 24 - 20 - 16 - 12 -...