LT5504 Datasheet | Linear Technology

Features - RF Frequency Range: 800MHz to 2.7GHz - Ultra Wide Dynamic Range: 75d B at 900MHz - Wide Power Supply Range: 2.7V to 5.25V - Low Supply Current: 14.7m A at 3V - 8-Lead MS0P Package U APPLICATIO S - RSSI Measurements - Receive AGC - Transmit Power Control - ASK and Envelope Demodulation - GSM/TDMA/CDMA/WCDMA TYPICAL APPLICATIO 800MHz to 2.7GHz RF Measuring Receiver DESCRIPTIO The LT®5504 is an 800MHz to 2700MHz monolithic integrated measuring receiver, capable of detecting a wide dynamic range RF signal from - 75d Bm to +5d Bm. 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 d B. The output is buffered with a low output impedance driver. , LTC and LT are registered trademarks of Linear Technology Corporation. SLOPE VARIATION (d B) C2 C1 1n F 100p F RF INPUT RF RF+ DETECTOR R1 82Ω - ENABLE 3V VOUT R2 200Ω IF DETECTOR - - - IF DETECTOR C3 10p...