ADL5513

Data Sheet ADL5513 1 MHz to 4 GHz, 80 dB Logarithmic Detector/Controller FEATURES ► Wide bandwidth: 1 MHz to 4 GHz ► 80 dB dynamic range (±3 dB) ► Constant dynamic range over frequency ► Stability over −40°C to +85°C temperature range: ±0.5 dB ► Operating temperature range: −40°C to +125°C ► Sensitivity: −70 dBm ► Low noise measurement/controller output (VOUT) ► Pulse response time: 21 ns/20 ns (fall/rise) ► Single-supply operation: 2.7 V to 5.5 V at 31 mA ► Power-down feature: 1 mW at 5 V ► Small footprint LFCSP ► Fabricated using high speed SiGe process APPLICATIONS ► RF transmitter power amplifier linearization and gain/power control ► Power monitoring in radio link transmitters ► RSSI measurement in base stations, WLAN, WiMAX, RADAR GENERAL DESCRIPTION The ADL5513 is a demodulating logarithmic amplifier, capable of accurately converting an RF input signal to a corresponding decibel-scaled output. It employs the progressive compression technique over a cascaded amplifier chain, each stage of which is equipped with a detector cell. The device can be used in either measurement or controller modes. The ADL5513 maintains accurate log conformance for signals up to 4 GHz. The input dynamic range is typically 80 dB (referred to 50 Ω) with error less than ±3 dB and 74 dB with error less than ±1 dB. The ADL5513 has 20 ns response time that enables RF burst detection to a pulse rate of beyond 50 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temp...