LT5504

Features:

  RF Frequency Range: 800MHz to 2.7GHz
  Ultra Wide Dynamic Range: 80dB Over Full Frequency Range and Over Temperature
  Wide Power Supply Range: 2.7V to 5.25V
   Low Supply Current: 14.7mA at 3V
  Shutdown Current: 0.2mA
 8-Lead MS0P Package


Application

Receive AGC
Transmit Power Control
ASK and Envelope Demodulation
 GSM/TDMA/CDMA/WCDMA



Specifications

Power Supply Voltage ............................................ 5.5V
VOUT, EN ................................................................ 0,VCC
LO Input Power .................................................... 6dBm
RF Input Power Differential (50W, 5.5V) ............. 24dBm
RF Input Power Single-Ended (50W, 5.5V) ......... 18dBm
Operating Ambient Temperature ..............40°C to 85°C
Storage Temperature Range ..................65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C

Description

The LT®5504 is an 800MHz to 2700MHz monolithic integratedmeasuring 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.