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AD8307

Analog Devices
Part Number AD8307
Manufacturer Analog Devices
Description Logarithmic Amplifier
Published Sep 28, 2018
Detailed Description Data Sheet FEATURES Complete multistage logarithmic amplifier 92 dB dynamic range: −75 dBm to +17 dBm to −90 dBm using m...
Datasheet PDF File AD8307 PDF File

AD8307
AD8307

Overview
Data Sheet FEATURES Complete multistage logarithmic amplifier 92 dB dynamic range: −75 dBm to +17 dBm to −90 dBm using matching network Single supply of 2.
7 V minimum at 7.
5 mA typical DC to 500 MHz operation, ±1 dB linearity Slope of 25 mV/dB, intercept of −84 dBm Highly stable scaling over temperature Fully differential dc-coupled signal path 100 ns power-up time, 150 μA sleep current APPLICATIONS Conversion of signal level to decibel form Transmitter antenna power measurement Receiver signal strength indication (RSSI) Low cost radar and sonar signal processing Network and spectrum analyzers (to 120 dB) Signal level determination down to 20 Hz True decibel ac mode for multimeters GENERAL DESCRIPTION The AD8307 is the first logarithmic amplifier made available in an 8-lead SOIC_N package.
It is a complete 500 MHz monolithic demodulating logarithmic amplifier based on the progressive compression (successive detection) technique, providing a dynamic range of 92 dB to ±3 dB law conformance and 88 dB to a tight ±1 dB error bound at all frequencies up to 100 MHz.
The AD8307 is extremely stable and easy to use, requiring no significant external components.
A single-supply voltage of 2.
7 V to 5.
5 V at 7.
5 mA is needed.
A fast acting CMOScompatible control pin can disable the AD8307 to a standby current of 150 μA.
The AD8307 operates over the industrial temperature range of −40°C to +85°C and is available in an 8-lead SOIC package and an 8-lead PDIP.
Low Cost, DC to 500 MHz, 92 dB Logarithmic Amplifier AD8307 FUNCTIONAL BLOCK DIAGRAM VPS 7 7.
5mA AD8307 BAND GAP REFERENCE AND BIASING 6 ENB INP +INP 8 INM 1 1.
1kΩ –INP 3 SIX 14.
3dB 900MHz AMPLIFIER STAGES COM 2 NINE DETECTOR CELLS SPACED 14.
3dB INPUT-OFFSET COMPENSATION LOOP 5 INT MIRROR 2µA /dB 2 4 OUT 12.
5kΩ COM 3 OFS 01082-001 Figure 1.
Table 1.
Next Generation Upgrades for the AD8307 Device No.
Product Description AD8310 15 ns Response Time, Buffered Output ADL5513 Lower Input Range (80 dB), Ope...


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