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AD8319

Analog Devices
Part Number AD8319
Manufacturer Analog Devices
Description Log Detector/Controller
Published Jan 19, 2007
Detailed Description Data Sheet FEATURES Wide bandwidth: 1 MHz to 10 GHz High accuracy: ±1.0 dB over temperature 45 dB dynamic range up to 8 ...
Datasheet PDF File AD8319 PDF File

AD8319
AD8319

Overview
Data Sheet FEATURES Wide bandwidth: 1 MHz to 10 GHz High accuracy: ±1.
0 dB over temperature 45 dB dynamic range up to 8 GHz Stability over temperature: ±0.
5 dB Low noise measurement/controller output VOUT Pulse response time (fall/rise): 6 ns/10 ns Small footprint: 2 mm × 3 mm LFCSP Supply operation: 3.
0 V to 5.
5 V @ 22 mA Fabricated using high speed SiGe process APPLICATIONS RF transmitter PA setpoint controls and level monitoring Power monitoring in radiolink transmitters RSSI measurement in base stations, WLANs, WiMAX, and radars GENERAL DESCRIPTION The AD8319 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 AD8319 maintains accurate log conformance for signals of 1 MHz to 8 GHz and provides useful operation to 10 GHz.
The input dynamic range is typically 45 dB (re: 50 Ω) with error less than ±3 dB.
The AD8319 has 6 ns/10 ns (fall time/rise time) response time that enables RF burst detection to a pulse rate of beyond 50 MHz.
The device provides unprecedented logarithmic intercept stability vs.
ambient temperature conditions.
A supply of 3.
0 V to 5.
5 V is required to power the device.
Current consumption is typically 22 mA, and it decreases to 200 µA when the device is disabled.
The AD8319 can be configured to provide a control voltage to a power amplifier or a measurement output from the VOUT pin.
Because the output can be used for controller applications, special attention was paid to minimize wideband noise.
In this mode, the setpoint control voltage is applied to the VSET pin.
1 MHz to 10 GHz, 45 dB Log Detector/Controller AD8319 FUNCTIONAL BLOCK DIAGRAM VPOS TADJ GAIN BIAS SLOPE IV VSET INHI INLO DET DET DET DET COMM Figure 1.
IV VOUT CLPF 05705-001 The fee...


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