Dual-Path 6GHz RMS Power Detection Technology Designed by LTC5583

This article introduces the main features, block diagram, single-ended input configuration and differential input configuration test circuit diagram, and single-ended input configuration diagram and differential input configuration diagram of LTC5583.
Linear's LTC5583 is a matched dual-channel 6GHz RMS power detector that can measure two AC signals with a dynamic range from -59dBm to 4dBm, a frequency range from 40MHz to 6GHz, and an accuracy of ±0.5dB over the entire temperature range. The matching output of the two channels is less than 1.25dB, and the response time is fast, with a rise time of 140ns. It is mainly used in VSWR monitors, MIMO transmit power control, base station power amplifier control, transmit and receive gain control, and RF instruments.

LTC5583 main features:

Frequency Range: 40MHz to 6GHz

Linear Dynamic Range: Up to 60dB

±0.5dB (Typ) Accuracy Over Temperature

40dB Channel-to-Channel Isolation at 2GHz Even with Single-Ended RF Inputs

Matched Dual-Channel Outputs: <1.25 dB (Typ)

Single-Ended RF Inputs—No Transformer Required

Accurate RMS Power Measurement of High Crest

Factor Modulated Waveforms

Difference Output Provides VSWR Measurement

Fast Envelope Detector Outputs

Fast Response Time: 140ns Rise Time

Small 4mm 4mm QFN24 Package

LTC5583 Application:

VSWR Monitor

MIMO Transmit Power Control

Basestation PA Control

Transmit and Receive Gain Control

RF Instrumentation

Figure 1. LTC5583

block diagram Figure 2. LTC5583 test circuit diagram: 40MHz-3GHz, single-ended input configuration

Figure 3. LTC5583 test circuit diagram: 2GHz-6GHz, differential input configuration

Figure 4. LTC5583 single-ended input configuration diagram

Figure 5. LTC5583 differential input configuration diagram

Figure 6. LTC5583 Evaluation board single-ended input configuration PCB layout (top layer)