LTC5509 300MHz to 3GHz RF Power Detector in SC70 Package FEATURES DESCRIPTIO n Temperature Compensated Internal Schottky Diode The LTC 5509 is an RF power detector for RF applications RF Detector operating in the 300MHz to 3GHz range. A temperature n Wide Input Frequency Range: 300MHz to 3GHz compensated Schottky diode peak detector and buffer n Wide Input Power Range: 30dBm to 6dBm amplifier are combined in a small SC70 package. The n Buffered Detector Output supply voltage range is optimized for operation from a n Wide V Range of 2.7V to 6V single lithium-ion cell or 3xNiMH. CC n Low Operating Current: 600m A The RF input voltage is peak detected using an on-chip n Low Shutdown Current: <2m A Schottky diode. The detected voltage is buffered and n SC70 Package supplied to the V pin without gain compression. Con- OUT sequently, the output voltage is linearly proportional to the U RF input voltage. A power saving shutdown mode reduces APPLICATIO S supply current to less than 2m A. n Multimode Mobile Phone Products The LTC5509 operates with input power levels from n Optical Data Links 30dBm to 6dBm. n Wireless Data Modems , LTC and LT are registered trademarks of Linear Technology Corporation. n Wireless and Cable Infrastructure n RF Power Alarm n Envelope Detector TYPICAL APPLICATIO Output Voltage vs RF Input Power 3000 V = 3.6V CC T = 25C A 2500 300MHz to 3GHz RF Power Detector 850MHz 1.85GHz 2000 33pF LTC5509 6 4 3GHz RF V RF CC V IN CC INPUT 1500 2 100pF 0.1F 5 GND GND 1000 1 3 V DISABLE ENABLE SHDN OUT V OUT 5509 TA01 500 0 30 25 20 15 10 5 0 5 10 RF INPUT POWER (dBm) 5509 TA02 5509f 1 V OUTPUT VOLTAGE (mV) OUT U ULTC5509 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) V , V to GND .................................... 0.3V to 6.5V ORDER PART CC OUT RF Voltage .........................................(V 1V) to 7V NUMBER IN CC TOP VIEW SHDN Voltage to GND ................ 0.3V to (V + 0.3V) CC LTC5509ESC6 SHDN 1 6 RF IN I ...................................................................... 5mA VOUT GND 2 5 GND Operating Temperature Range (Note 2) .. 40 C to 85 C V 3 4 V OUT CC Maximum Junction Temperature ......................... 125 C SC6 PART SC6 PACKAGE Storage Temperature Range ................ 65 C to 150 C MARKING 6-LEAD PLASTIC SC70 Lead Temperature (Soldering, 10 sec)................. 300 C T = 125 C, q = 256 C/W JMAX JA LADD Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. V = 3.6V, SHDN = V = HI, SHDN = 0V = LO, RF Input Signal is Off, A CC CC unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS V Operating Voltage l 2.7 6 V CC I Shutdown Current SHDN = LO l 2 m A VCC I Operating Current SHDN = HI, I = 0mA l 0.58 0.85 mA VCC VOUT V V (No RF Input) R = 2k, SHDN = HI, Enabled 150 250 400 mV OUT OL LOAD SHDN = LOW, Disabled 1 mV V Output Current V = 1.75V, V = 2.7V, D V = 10mV l 12 mA OUT OUT CC OUT V Enable Time SHDN = HI, C = 33pF, R = 2k l 820 m s OUT LOAD LOAD V Bandwidth C = 33pF, R = 2k (Note 4) 1.5 MHz OUT LOAD LOAD V Load Capacitance (Note 6) l 33 pF OUT V Slew Rate V = 0.7V Step, C = 33pF, R = 2k (Note 3) 8 V/m s OUT RFIN LOAD LOAD V Noise V = 3V, Noise BW = 1.5MHz, 50W RF Input Termination 2 mV OUT CC P-P SHDN Voltage, Chip Disabled V = 2.7V to 6V l 0.35 V CC SHDN Voltage, Chip Enabled V = 2.7V to 6V l 1.4 V CC SHDN Input Current SHDN = 3.6V l 24 40 m A RF Input Frequency Range 300 to 3000 MHz IN RF Input Power Range RF Frequency = 300MHz to 3GHz (Note 5, 6) 30 to 6 dBm IN RF AC Input Resistance F = 300MHz, Pin = 25dBm 150 W IN RF Input Shunt Capacitance F = 300MHz, Pin = 25dBm 0.9 pF IN Note 1: Absolute Maximum Ratings are those values beyond which the life Note 3: The rise time at V is measured between V /2 + 0.5V to OUT OUT of a device may be impaired. V /2 0.5V. OUT Note 2: Specifications over the 40 C to 85 C operating temperature Note 4: Bandwidth is calculated using the 10% to 90% rise time equation: range are assured by design, characterization and correlation with BW = 0.35/rise time. statistical process controls. Note 5: RF performance is tested at 1800MHz Note 6: Guaranteed by design. 5509f 2 U WWW