LINEARITY ERROR (dB) LTC5583 Matched Dual-Channel 6GHz RMS Power Detector FEATURES DESCRIPTION n Frequency Range: 40MHz to 6GHz The LTC 5583 is a dual-channel RMS power detector, n Linear Dynamic Range: Up to 60dB capable of measuring two AC signals with wide dynamic n 0.5dB (Typ) Accuracy Over Temperature range, from 59dBm to 4dBm, depending on frequency. n 40dB Channel-to-Channel Isolation at 2GHz Even Each AC signals power in decibel-scaled value is precisely with Single-Ended RF Inputs converted to a DC voltage on a linear scale, independent n Matched Dual-Channel Outputs: <1.25dB (Typ) of the crest factor of the input signal waveforms. The n Single-Ended RF InputsNo Transformer Required LTC5583 is suitable for precision power measurement and n Accurate RMS Power Measurement of High Crest level control for a variety of RF standards, including LTE, Factor Modulated Waveforms EDGE, W-CDMA, CDMA2000, TD-SCDMA, and WiMAX. n Difference Output Provides VSWR Measurement Good channel-to-channel isolation is necessary for oper- n Fast Envelope Detector Outputs ating the dual channels simultaneously. For applications n Fast Response Time: 140ns Rise Time where the two input signals are at the same frequency (e.g. n Small 4mm 4mm QFN24 Package measuring VSWR), the LTC5583 provides 40dB isolation at 2.14GHz even with single-ended inputs. No baluns are needed. When the two input signals are at different frequen- APPLICATIONS cies, the isolation can be as high as 50dB. The isolation n VSWR Monitor can be improved to >55dB with differential inputs. n MIMO Transmit Power Control n The power difference of the two input signals is provided Basestation PA Control n at a difference output pin. Each channel also has a fast Transmit and Receive Gain Control n envelope detector, which tracks the RF input signals en- RF Instrumentation velope and outputs a voltage directly proportional to the L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. signals instantaneous power. The envelope detectors can Protected by U.S. Patents including 7262661, 7317357, 7622981. be disabled to reduce power consumption. TYPICAL APPLICATION Output Voltage and Linearity Error vs RF Input Power, 2140MHz CW Block Diagram Inputs, Single-Ended Drive 2.5 2.5 + INAIN A 2.0 V OA ENVA 2.0 1.5 ENVELOPE RMS 1.0 DETECT DETECT 1.5 0.5 + V ODF 0 1.0 0.5 85C, CH A ENVB 1.0 85C, CH B DIFFERENCE 25C, CH A ENVELOPE RMS AMPLIFIER 0.5 1.5 V OB 25C, CH B DETECT DETECT 40C, CH A 2.0 40C, CH B 0 2.5 LTC5583 + 65 55 45 35 25 15 5 5 V INBIN B INV OS INPUT POWER (dBm) 5583 BD 5583 TA01b 5583fa 1 V , V (V) OA OBLTC5583 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Supply Voltage .........................................................3.8V Enable Voltage .................................0.3V to V + 0.3V CC V Voltage ......................................0.3V to V + 0.3V 24 23 22 21 20 19 OS CC INV Voltage ............................................... 0.3V to 3.6V DECA 1 18 V OA Input Signal Power (Single-Ended, 50) .............18dBm V 2 17 RT1 CCA V 3 16 V Input Signal Power (Differential, 50) .................24dBm CCR ODF 25 GND EN 4 15 V OS T .................................................................... 125C JMAX V RT2 5 14 CCB Operating Temperature Range .................40C to 85C DECB 6 13 V OB Storage Temperature Range .................. 65C to 125C 7 8 9 10 11 12 UF PACKAGE 24-LEAD (4mm s 4mm) PLASTIC QFN T = 125C, = 37C/W JMAX JA EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC5583IUF PBF LTC5583IUF TRPBF 5583 24-Lead (4mm 4mm) Plastic QFN 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: