Logarithmic RF Power Detector from Soanar - Electronic Component & Supply Chain Solutions
Logarithmic RF Power Detector
Linear Technology has introduced a new monolithic broadband, high performance logarithmic RF power detector, LT5538. The LT5538 available from Soanar - Electronic Component & Supply Chain Solutions , provides accurate RF power measurement over a wide frequency range covering the 800-900MHz and the 1.7GHz to 2.2GHz cellular bands, as well as the 2.6GHz and 3.5GHz WiMAX bands.
The LT5538 provides a DC output voltage that is log-linearly proportional to its input power level. Within its measurement dynamic range, the detector exhibits high accuracy and linearity of +/- 0.8dB over its rated operating temperature range of -40°C to +85°C.
Moreover, the LT5538 has high sensitivity, capable of detecting signals as small as -75dBm to as large as +10dBm at 2.14GHz. The device operates with a single-ended RF input. It requires no external RF transformer, thus simplifying design while reducing costs.
Summary of features of LT5538:
- Operating frequency range 40MHz to 3.8GHz
- Accurate over temperature (-40°C to +85°C) ±0.8dB
- Log-linear dynamic range: at 880MHz 75dB, at 2.14GHz 70dB
- Fast response time: rise time 100ns, fall time 200ns
- Single-ended operation - No external transformer
- Small package 3mm x 3mm DFN
2-Jun-2008