Datasheet ADL5513 (Analog Devices)

1 MHz to 4 GHz, 80 dB Logarithmic Detector/Control er Data Sheet ADL5513 FEATURES FUNCTIONAL BLOCK DIAGRAM Wide bandwidth: 1 MHz to 4 GHz NC NC CLPF NC 16 15 14 13 80 dB dynamic range (±3 dB) Constant dynamic range over frequency DET DET DET DET DET I V 12 VOUT Stability over −40oC to +85oC temperature range: ±0.5 dB VPOS 1 Operating temperature range: −40oC to +125oC INHI 2 Sensitivity: −70 dBm I V 11 VSET INLO 3 Low noise measurement/controller output (VOUT) ADL5513 Pulse response time: 21 ns/20 ns (fall/rise) 10 COMM Single-supply operation: 2.7 V to 5.5 V at 31 mA VPOS 4 SLOPE BAND GAP GAIN CONTROL REFERENCE BIAS 9 TADJ Power-down feature: 1 mW at 5 V
001
Small footprint LFCSP 5 6 7 8 NC NC NC NC
07514-
Fabricated using high speed SiGe process
Figure 1.
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 The feedback loop through an RF amplifier is closed via VOUT, of accurately converting an RF input signal to a corresponding the output of which regulates the amplifier output to a magni- decibel-scaled output. It employs the progressive compression tude corresponding to VSET. The ADL5513 provides 0 V to technique over a cascaded amplifier chain, each stage of which (VPOS − 0.1 V) output capability at the VOUT pin, suitable is equipped with a detector cell. The device can be used in either for controller applications. As a measurement device, VOUT measurement or controller modes. The ADL5513 maintains is external y connected to VSET to produce an output voltage, accurate log conformance for signals up to 4 GHz. The input VOUT, that increases linear-in-dB with RF input signal amplitude. dynamic range is typical y 80 dB (referred to 50 Ω) with error less The logarithmic slope is 21 mV/dB, determined by the VSET than ±3 dB and 74 dB with error less than ±1 dB. The ADL5513 interface. The intercept is −88 dBm (referred to 50 Ω, conti- has 20 ns response time that enables RF burst detection to a nuous wave input, 900 MHz) using the INHI input. These pulse rate of beyond 50 MHz. The device provides unprecedented parameters are very stable against supply and temperature logarithmic intercept stability vs. ambient temperature conditions. variations. A supply of 2.7 V to 5.5 V is required to power the device. Current consumption is 31 mA, and it decreases to 200 μA when the The ADL5513 is fabricated on a SiGe bipolar IC process and device is disabled. is available in a 3 mm × 3 mm, 16-lead LFCSP package for the −40°C to +125°C operating temperature range. A fully populated The ADL5513 can be configured to provide a control voltage to evaluation board is available. a power amplifier or a measurement output from the VOUT pin. Because the output can be used for control er applications, special attention has been paid to minimize wideband noise. In this mode, the setpoint control voltage is applied to the VSET pin.
Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2008–2017 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Basic Connections Input Signal Coupling Output Filtering Output Interface Setpoint Interface Description of Characterization Error Calculations Adjusting Accuracy Through Choice of Calibration Points Temperature Compensation of Output Voltage Device Calibration Power-Down Functionality Measurement Mode Setting the Output Slope in Measurement Mode Controller Mode Constant Power Operation Increasing the Dynamic Range of the ADL5513 Evaluation Board Outline Dimensions Ordering Guide