LINEARITY ERROR (dB) 5570 TA01a LT5570 Fast Responding, 40MHz to 2.7GHz Mean-Squared Power Detector FEATURES DESCRIPTION n Frequency Range: 40MHz to 2.7GHz The LT 5570 is a 40MHz to 2.7GHz monolithic Logarithmic n Accurate RMS Power Measurement of High Crest Mean-Squared RF power detector. It is capable of RMS Factor Modulated Waveforms measurement of an AC signal with wide dynamic range, n Linear DC Output vs Input Power in dBm from 52dBm to 13dBm depending on frequency. The n Linear Dynamic Range: Up to 60dB power of the AC signal in an equivalent decibel-scaled n Exceptional Accuracy over Temperature: 0.3dB value is precisely converted into DC voltage on a linear n Fast Response Time: 0.5s Rise Time, scale, independent of the crest factor of the waveforms. The 8s Fall Time LT5570 is suitable for precision RF power measurement and n Low Supply Current: 26.5mA level control for a wide variety of RF standards, including n Low Impedance Output Buffer Capable of Driving CDMA, W-CDMA, CDMA2000, TD-SCDMA and WiMAX. High Capacitance Load The DC output is buffered with a low output impedance n Small 3mm 3mm 10-Lead DFN Package ampli er capable of driving a high capacitance load. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. APPLICATIONS All other trademarks are the property of their respective owners. Protected by U.S. Patents including 7262661, 7259620, 7268608. n RMS Power Measurement n RF Power Control n Receive and Transmit Gain Control n W-CDMA, CDMA2000, TD-SCDMA, WiMAX n RF Instrumentation TYPICAL APPLICATION 40MHz to 2.7GHz Mean-Squared Power Detector Output Voltage, Linearity Error vs Input Power, 25C (2140 MHz) 2.4 3 5V 1M F 1nF 22nF 2.0 2 1 10 RF V FLTR 1.6 1 CC INPUT 1:4 2 9 + IN EN ENABLE 1.2 0 3 8 LT5570 NC DEC DNC 4 7 IN DNC 0.8 1 5 6 GND OUT V OUT 0.4 2 CW 4CH WCDMA 3CH CDMA2000 0 3 45 35 25 15 5 5 15 RF INPUT POWER (dBm) 5570 TA01b 5570f 1 V (V) OUTLT5570 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Supply Voltage .........................................................5.5V Enable Voltage .................................0.3V to V + 0.3V V 1 10 FLTR CC CC + IN 9 EN 2 Input Signal Power (Differential) ..........................15dBm DEC 3 DNC 8 T .................................................................... 125C JMAX 4 7 IN DNC Operating Temperature Range.................. 40C to 85C GND 5 6 OUT Storage Temperature Range ................... 65C to 125C DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFNs CAUTION: This part is sensitive to electrostatic discharge. It T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB is very important that proper ESD precautions be observed when handling the LT5570. ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT5570IDD PBF LT5570IDD TRPBF LCJQ 40C to 85C 10-Lead (3mm 3mm) Plastic DFN Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: