DEMO CIRCUIT 1599A LTC5583 QUICK START GUIDE LTC5583 DUAL 6GHz RMS POWER DETECTOR DESCRIPTION Demonstration circuit 1599A is a Mean-Squared Power The DC1599A Demo Circuit is ideal for frequency operation below 3.0GHz. It has the single ended input Detector featuring the LTC 5583 IC. LTC5583 is a drive to LTC5583. The input A to output B (or input B dual-channel RMS power detector, capable of to output A) isolation is 33dB at 2.7GHz, and degrades measuring two AC signals. It provides 40dB of as input frequency increases. As a result, operating channel to channel isolation with no frequency above 3GHz may require differential input matching for separation at 2140MHz that is suited for measuring improved isolation. Temperature performance is VSWR. optimized for 2140MHz. Contact LTC applications for more information. The LTC5583 is a wide dynamic range Mean Squared RF Power Detector, operational from 40MHz to 6GHz. LTC is a trademark of Linear Technology Corporation The input dynamic range with 1dB nonlinearity is Design files for this circuit board are available. Call the 60dB depending on frequency(from 58dBm to LTC factory. +2dBm, single-ended 50 input). The detector output voltage slope is normally 30mV/dB, and the typical output variation over temperature is 0.5dB at 880MHz. Typical Performance Summary (V = 3.3V, EN = HIGH, T = 25C, unless otherwise noted. Test circuit shown in Figure 1.) A CC PARAMETER CONDITION VALUE Supply Voltage 3.1V to 3.5V Supply Current Envelope detector off 80.5mA Envelope detector on 90.1mA Shutdown Current EN = Lo 0.1A Low, Chip Disabled 0.3V max EN Voltage HIGH, Chip Enabled 2V min V = 0V 0A EN EN Input Current V = 3.3V 100A EN Output Start Voltage No Input Signal Present 0.45V Rise Time 0.5V to 2.2V, 10% to 90%, C =C = 8.2nF, F = 100 MHz 140nS RF FLTRA FLTRB Fall Time 2.2V to 0.5V, 90% to 10%, C =C =8.2nF, F = 100 MHz 3.5uS RF FLTRA FLTRB Input Frequency Range Operation over wider frequency range with reduced performance 40MHz to 6GHz f =450MHz Linear Dynamic Range 1 dB linearity error 63 dB RF Input Power Range CW, 50, 1dB Linearity Error -59 to 4 dBm Slope 29.6mV/dB Logarithmic Intercept -78.5dBm 1 L TC5583 Deviation from CW Response 12 dB peak-to-average ratio (4 carrier WCDMA) 0.4 INA to VOB isolation P = -45dBm, VOB= VOB p 1 dB, Frequency Separation=0Hz 50dB INB INB INB to VOA isolation P = -45dBm, VOA= VOA p 1 dB, Frequency Separation=0Hz 50dB INA INA f =2140MHz Linear Dynamic Range 1 dB linearity error 60 dB RF Input Power Range CW, 50, 1dB Linearity Error -58 to 2 dBm Slope 29.6mV/dB Logarithmic Intercept -77.4dBm Deviation from CW Response 12 dB peak-to-average ratio (4 carrier WCDMA) 0.3 INA to VOB isolation P = -45dBm, VOB= VOB p 1 dB, Frequency Separation=0Hz 40dB INB INB INB to VOA isolation P = -45dBm, VOA= VOA p 1 dB, Frequency Separation=0Hz 40dB INA INA f =2700MHz Linear Dynamic Range 1 dB linearity error 59 dB RF Input Power Range CW, 50, 1dB Linearity Error -56 to 3 dBm Slope 30mV/dB Logarithmic Intercept -74.9dBm Deviation from CW Response 12 dB peak-to-average ratio (WiMAX OFDM) 0.6dB INA to VOB isolation P = -45dBm, VOB= VOB p 1 dB, Frequency Separation=0Hz 33dB INB INB INB to VOA isolation P = -45dBm, VOA= VOA p 1 dB, Frequency Separation=0Hz 33dB INA INA Table 1. Jumper Description JUMPER FUNCTION RANGE/SETTING (DEFAULT) JP1 Chip Enable. EN for High, DIS for Lo EN JP2 VCCN. Power supply to the envelop detector for both channels. HI=on, LO=off LO JP3 INV. Swap control for the polarity of VODF. HI=(VOB-VOA)+VOS, LO=(VOA-VOB)+VOS LO QUICK START PROCEDURE Demonstration circuit 1599A is easy to set up to 4. Connect DC power supplys positive (+) output evaluate the performance of the LTC5583. Refer to (3.1V to 3.5V) to demo board V test point(TP7). CC Figure 1 for measurement equipment setup and follow Do not exceed 3.8V, the absolute maximum the procedure below: supply voltage. Set VCCN jumper to LO, to turn off the envelope 1. Connect voltmeters negative (-) lead to demo detector if not needed. board GND test point(TP8 or TP9). Set the Swap jumper to LO for: 2. Connect voltmeters positive (+) lead to the demo VODF= (VOA-VOB)+VOS. board VOA(TP2) and VOB(TP5) to measure Set swap to HI for: channel A and channel B output respectively. VODF=(VOB-VOA)+VOS 3. Connect DC power supplys negative (-) output to 5. Connect signal generators output to demo board demo board GND(TP8 or TP9). INPUT port (SMA connector J1 for channel A input, or J2 for channel B input) via coaxial cable. 2