Milpitas, Calif.Linear Technology has introduced the LTC5582, a high dynamic range 10GHz RMS detector that measures RF signals with high accuracy.
The LTC5582 offers ±0.2dB linearity over a 43dB dynamic range at 2.14GHz, regardless of the high crest-factor modulations used in 3G and 4G broadband wireless networks, including LTE, WiMAX, TD-SCDMA, W-CDMA and CDMA2000.
In addition, the LTC5582 can accurately measure signal levels as low as -56dBm to 1dBm to ±1dB error, providing 57dB dynamic range from 450MHz to 2.7GHz. The device is capable of operating at higher frequencies, providing 46dB of useful dynamic range at 6GHz, and 38dB at 10GHz. Moreover, the device operates efficiently on a single 3.3V supply. Its RF input is designed to operate single-ended, requiring no external balun transformer, thus reducing the solution size and cost.
Linear Technology is the second chip vendor to roll out an RMS detector this month. Analog Devices recently introduced an RMS detector designed to accurately measure large crest factor signals in 3G and 4G devices. See story: click here.
From -40°C to 85°C, Linear's device can deliver 48dB of dynamic range with a linearity accuracy of ±1dB. This enables use of the LTC5582 in rugged environments such as RRUs (Remote Radio Units) or ODU (Outdoor Units) deployed on cellular towers with minimal calibration adjustments. Moreover, the device has on-chip provisions for first- and second-order temperature compensation which can be easily calibrated for improved temperature performance.
The LTC5582 has a log-linear response, which precisely converts the RF signal levels in dB scale into a linearly proportional DC voltage. Operating in the wireless network frequency range from 450MHz to 2.7GHz, the detector response maintains a constant slope as the signal frequency changes. This allows a single detector to operate in multiband environments with minimal calibration adjustments. Moreover, the LTC5582 has fast settling characteristics, acquiring a rising signal accurately in 500ns and a falling signal in 4.5µs. Its fast response supports a wide range of signal envelope tracking applications.
The LTC5582 is powered from a single 3.3V supply with an operating current of 42mA, minimizing power consumption. The device has an Enable pin, allowing the chip to power down. When in shutdown mode, the device draws trickle current of less than 10µA. The LTC5582 comes in a small 3mm x 3mm 10-pin DFN package.
Pricing: Starts at $6.25 in 1,000 piece quantities.
Availability: From stock.
Datasheet: Click here.
Linear Technology, www.linear.com