LTC5505-1/LTC5505-2 RF Power Detector with Buffered Output and >40dB Dynamic Range DESCRIPTIO FEATURES n Internal Schottky Diode RF Detector with Two Input The LTC 5505-X is an RF power detector for RF applica- Power Ranges: tions operating in the 300MHz to 3.5GHz range. A tem- LTC5505-1, 28dBm to 18dBm perature compensated Schottky diode peak detector and LTC5505-2, 32dBm to 12dBm buffer amplifier are combined in a small 5-pin ThinSOT n Wide Input Frequency Range: 300MHz to 3GHz package. The supply voltage range is optimized for opera- (LTC5505-1) 300MHz to 3.5GHz (LTC5505-2) tion from a single lithium-ion cell or 3xNiMH. n Temperature Compensated The RF input voltage is peak detected using an on-chip n Buffered Detector Output Schottky diode. The detected voltage is buffered and n Wide V Range of 2.7V to 6V CC supplied to the V pin. A power saving shutdown mode OUT n Low Operating Current: 0.5mA reduces supply current to less than 2m A. n Low Shutdown Current: <2m A TM n The LTC5505-1 operates with input power levels from Low Profile (1mm) ThinSOT Package 28dBm to 18dBm. The LTC5505-2 operates with input U power levels from 32dBm to 12dBm. APPLICATIO S , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation n Multimode Mobile Phone Products n PCS Devices n Wireless Data Modems n Wireless and Cable Infrastructure n RF Power Alarm n Envelope Detector TYPICAL APPLICATIO Dual Band Mobile Phone Tx Power Control C1 R1 0.3pF 100 RF LTC5505-X Tx PA MODULE 1 5 V RF CC IN DIPLEXER C2 CELL BAND 2 Li-Ion 0.1F GND 3 4 V DISABLE ENABLE SHDN OUT PCS BAND MOBILE PHONE V PC DSP 5505 TA01 BSE 5505f 1 U ULTC5505-1/LTC5505-2 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ORDER PART V , V to GND .................................... 0.3V to 6.5V CC OUT NUMBER RF Voltage TOP VIEW LTC5505-1 ................................... (V 2.6V) to 7V LTC5505-1ES5 CC RF 1 5 V IN CC LTC5505-2 ................................... (V 1.4V) to 7V LTC5505-2ES5 CC GND 2 SHDN Voltage to GND ................ 0.3V to (V + 0.3V) SHDN 3 4 V CC OUT S5 PART I ...................................................................... 5mA VOUT S5 PACKAGE MARKING Operating Temperature Range (Note 2) .. 40 C to 85 C 5-LEAD PLASTIC SOT-23 Maximum Junction Temperature ......................... 125 C T = 125 C, q = 250 C/W JMAX JA LTXV Storage Temperature Range ................ 65 C to 150 C LTRW Lead Temperature (Soldering, 10 sec)................. 300 C 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 0.5 0.75 mA VCC VOUT V V (No RF Input) R = 2k, SHDN = HI, Enabled 170 260 350 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) 4 MHz OUT LOAD LOAD V Load Capacitance (Note 7) l 33 pF OUT V Slew Rate V = 2V Step, C = 33pF, R = 2k (Note 3) 10 V/m s OUT RFIN LOAD LOAD V Noise V = 3V, Noise BW = 1.5MHz, 50W RF Input Termination 1.4 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 5505f 2 U WWW