800MHz to 2.7GHz RF Measuring Receiver

The LT5504 is an 800MHz to 2700MHz monolithic integrated measuring receiver, capable of detecting a wide dynamic range RF signal from -75dBm to +5dBm. The logarithm of the RF signal is precisely converted into a linear DC voltage. The LT5504 consists of RF/IF limiters, an LO buffer amplifier, a limiting mixer, a 3rd-order 450MHz integrated low pass filter, RF/IF detectors and an output interface. The ultrawide dynamic range is achieved by simultaneously measuring the RF signal and a downconverted IF signal obtained using the on-chip mixer and an external local oscillator. The RF- and IF-detected signals are summed to generate an accurate linear DC voltage proportional to the input RF voltage (or power) in dB. The output is buffered with a low output impedance driver.

Applications

* RSSI Measurements

* Receive AGC

* Transmit Power Control

* ASK and Envelope Demodulation

* GSM/TDMA/CDMA/WCDMA

* RF Frequency Range: 800MHz to 2.7GHz

* Ultra Wide Dynamic Range: 75dB at 900MHz

* Wide Power Supply Range: 2.7V to 5.25V

* Low Supply Current: 14.7mA at 3V

* 8-Lead MS0P Package