SLOPE VARIATION (dB) LT5504 800MHz to 2.7GHz RF Measuring Receiver FEATURES DESCRIPTIO RF Frequency Range: 800MHz to 2.7GHz The LT 5504 is an 800MHz to 2700MHz monolithic inte- Ultra Wide Dynamic Range: 75dB at 900MHz grated measuring receiver, capable of detecting a wide Wide Power Supply Range: 2.7V to 5.25V dynamic range RF signal from 75dBm to +5dBm. The Low Supply Current: 14.7mA at 3V logarithm of the RF signal is precisely converted into a 8-Lead MS0P Package linear DC voltage. The LT5504 consists of RF/IF limiters, an LO buffer amplifier, a limiting mixer, a 3rd-order U 450MHz integrated low pass filter, RF/IF detectors and an APPLICATIO S output interface. The ultrawide dynamic range is achieved RSSI Measurements by simultaneously measuring the RF signal and a down- Receive AGC converted IF signal obtained using the on-chip mixer and Transmit Power Control an external local oscillator. The RF- and IF-detected sig- ASK and Envelope Demodulation nals are summed to generate an accurate linear DC voltage GSM/TDMA/CDMA/WCDMA proportional to the input RF voltage (or power) in dB. The output is buffered with a low output impedance driver. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO 3V C2 C1 1nF 100pF Output Voltage and Slope Variation vs RF Input Power V LT5504 CC 6 2.4 f = 900MHz RF f = 240MHz IF 4 2.0 AVERAGE SLOPE:23mV/dB OUTPUT V OUT 2 R2 1.6 200 0 C3 1.2 RF IF IF RF + 10pF DETECTOR DETECTOR DETECTOR RF INPUT 2 0.8 R1 82 4 0.4 RF LO LO 6 0 ENABLE EN 80 70 60 50 40 30 20 10 0 10 INPUT 5504 TA01a PIN (dBm) GND 5504 TA01b 5504f 1 V (V) OUT U ULT5504 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ORDER PART Power Supply Voltage ............................................ 5.5V TOP VIEW NUMBER V , EN ................................................................ 0,V V 1 8 V CC CC OUT CC + RF 2 7 V OUT LO Input Power .................................................... 6dBm LT5504EMS8 RF 3 6 LO GND 4 5 EN RF Input Power Differential (50, 5.5V) ............. 24dBm MS8 PACKAGE RF Input Power Single-Ended (50, 5.5V) ......... 18dBm 8-LEAD PLASTIC MSOP MS8 PART MARKING Operating Ambient Temperature ..............40C to 85C T = 150C, = 160C/W JMAX JA LTGP Storage Temperature Range ..................65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS T = 25C. V = 3V, P = 10dBm, unless otherwise noted. (Notes 2, 3) A CC LO SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS RF Input f Frequency Range 800 to 2700 MHz RF Input Impedance (Note 6) DC Voltage Internally Biased 1.7 V LO Input f Frequency Range 850 to 3100 MHz LO Input Return Loss Internally Matched to 50 14 dB DC Voltage Internally Biased 0.82 V P LO Power 16 to 8 dBm LO LO to RF Leakage 900MHz 50 dBc 1.9GHz 45 dBc 2.5GHz 40 dBc IF Frequency f Frequency 50 to 450 MHz IF Output Voltage at f = 900MHz, f = 1140MHz RF LO Linear Dynamic Range (Note 4) 66 75 dB Output Voltage Input = 70dBm 0.4 V Input = 20dBm 1.6 V Input = 0dBm 2.1 V Average Slope Input from 50dBm to 20dBm 16 23 mV/dB Output Voltage at f = 1900MHz, f = 2140MHz RF LO Linear Dynamic Range (Note 4) 60 72 dB Output Voltage Input = 70dBm 0.35 V Input = 20dBm 1.52 V Input = 0dBm 1.9 V Average Slope Input from 50dBm to 20dBm 16 23 mV/dB 5504f 2 U WWW