LTC5536 600MHz to 7GHz Precision RF Detector with Fast Comparator Output FEATURES DESCRIPTIO Temperature Compensated Internal Schottky The LTC 5536 is an RF power detector for RF applications Diode RF Detector operating in the 600MHz to 7GHz range. A temperature Wide Input Frequency Range: 600MHz to 7GHz* compensated Schottky diode peak detector and fast com- TM Wide Input Power Range: 26dBm to 12dBm parator are combined in a small ThinSOT package. The Fast Comparator Output with Latch Enable supply voltage range is optimized for operation from a 25ns Response Time with 0dBm RF Input Level single cell lithium-ion or three cell NiMH battery. Rail-to-Rail Output Swing The RF input voltage is peak detected using an on-chip Comparator Output Current: 20mA Schottky diode. The detected voltage is compared against Wide V Range of 2.7V to 5.5V CC a reference voltage at V . M Low Operating Current: 2mA The response time from the RF input to V can be as little Available in a Low Profile (1mm) SOT-23 Package OUT as 20ns. The comparator output is latched when LEN is U high or is transparent when LEN is low. APPLICATIO S The LTC5536 operates with RF input power levels from RF Signal Presence Detectors for: 26dBm to 12dBm. 802.11a, 802.11b, 802.11g, 802.15 Optical Data Links , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. Wireless Data Modems *Operation at higher frequencies is possible with reduced performance. Wireless and Cable Infrastructure RF Power Alarm Envelope Detector RF ID Tag Reader TYPICAL APPLICATIO V Comparator Switching Voltage M vs RF Input Power, 600MHz 7GHz 3200 V = 3.6V 600MHz CC 600MHz to 7GHz RF Power Detector V = 0V 1000MHz LEN 2800 T = 25C 2000MHz A 3000MHz 2400 4000MHz 33pF LTC5536 5000MHz 1 2000 RF 6 V 6000MHz RF CC V IN CC INPUT 7000MHz 1600 100pF 0.1F 2 5 GND V 1200 OUT 800 3 4 V M V DISABLE ENABLE M LEN REFERENCE 400 5536 TA01 0 28 24 20 16 12 8 4 0 4 8 12 INPUT RF POWER (dBm) 5536 TA01b 5536f 1 V SWITCHING VOLTAGE (mV) M U ULTC5536 UUW PACKAGE/ORDER I FOR ATIO ABSOLUTE AXI U RATI GS (Note 1) ORDER PART V , V , V , LEN .................................... 0.3V to 6V CC OUT M NUMBER RF Voltage ...................................(V 1.5V) to 6.5V IN CC TOP VIEW I .................................................................. 25mA VOUT LTC5536ES6 RF 1 6 V IN CC Operating Temperature Range (Note 2) .. 40C to 85C GND 2 5 V OUT Maximum Junction Temperature ......................... 125C V 3 4 LEN M Storage Temperature Range ................ 65C to 150C S6 PART S6 PACKAGE Lead Temperature (Soldering, 10 sec).................. 300C 6-LEAD PLASTIC TSOT-23 MARKING T = 125C, = 250C/W JMAX JA LBDS Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 3.6V, RF Input Signal is Off, V = 160mV unless otherwise noted. A CC M PARAMETER CONDITIONS MIN TYP MAX UNITS V Operating Voltage 2.7 5.5 V CC I Operating Current I = 0mA, V = 0.5V 2.1 3 mA VCC VOUT M V V (No RF Input) I = 20mA, V = 0.5V 0.8 V OUT OL SINK M V V (No RF Input) I = 20mA, V = 0V V 0.4 V OUT OH SOURCE M CC V Output Current 15 20 mA OUT V Voltage Range V -1. 8 V M CC V Input Current 0.5 0.5 A M V Switch Point (No RF Input) V Low to High 65 100 135 mV M OUT V High to Low 90 mV OUT LEN Input Current LEN = 3.6V 22 42 A LEN Switch Point Low to High 1.5 V High to Low 0.5 V RF Input Frequency Range (Note 5) 600 to 7000 MHz IN RF Input Power Range RF Frequency = 600MHz to 7GHz (Note 3, 4) V = 2.7V to 5.5V 26 to 12 dBm IN CC RF AC Input Resistance F = 1000MHz, Pin = 25dBm 220 IN RF Input Shunt Capacitance F = 1000MHz, Pin = 25dBm 0.65 pF IN Response Time V = 1V , f = 1000MHz, V = 0.15V, 20 ns RF P-P RF M V Low to High Transition OUT t V Rise Time 0.5V to 3V 2 ns r OUT t V Fall Time 3V to 0.5V 2 ns f OUT Note 1: Absolute Maximum Ratings are those values beyond which the life Note 3: RF performance is tested at 1800MHz. of a device may be impaired. Note 4: Guaranteed by design. Note 2: Specifications over the 40C to 85C operating temperature Note 5: Operation at higher frequencies is possible with reduced range are assured by design, characterization and correlation with performance. Consult factory for more information. statistical process controls. 5536f 2 U WWW