The ADL5505 is a highly accurate, easy to use means of determining the rms of complex waveforms. It can be used for power measurements of both simple and complex waveforms but is particularly useful for measuring high crest factor (high peak-to-rms ratio) signals, such as W-CDMA, CDMA2000, WiMAX, WLAN, and LTE waveforms.

The on-chip modulation filter provides adequate averaging for most waveforms. An on-chip, 100 Ω series resistance at the output, combined with an external shunt capacitor, creates a low-pass filter response that reduces the residual ripple in the dc output voltage.

The ADL5505 offers excellent temperature stability across a 30 dB range and near 0 dB measurement error across temperature over the top portion of the dynamic range. In addition to its temperature stability, the ADL5505 offers low process variations that further reduce calibration complexity.

The power detector operates from −40°C to +85°C and is available in an 4-ball, 0.8 mm × 0.8 mm wafer-level chip scale package. It is fabricated on a high f_T silicon BiCMOS process.

Applications

• Power measurement of W-CDMA, CDMA2000, QPSK-/QAM-based OFDM (LTE and WiMAX), and other complex modulation waveforms
• RF transmitter or receiver power measurement