AD8307AN

Overview

The AD8307AN is a monolithic logarithmic amplifier manufactured by Analog Devices Inc., housed in an 8-lead PDIP package. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical current consumption of 7.5 mA. The device provides a dynamic range of 92 dB, spanning from −75 dBm to +17 dBm, and supports frequencies up to 500 MHz. It features a logarithmic slope of 25 mV/dB and an intercept point of −84 dBm. The component includes a CMOS-compatible enable pin that reduces standby current to 150 μA.

Feature Summary

• Complete multistage logarithmic amplifier utilizing progressive compression technique
• Fully differential dc-coupled signal path for high stability
• CMOS-compatible control pin for rapid power-down to low standby 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

Procurement Notes

Verify the specific ordering suffix AN against official Analog Devices documentation to confirm the PDIP package type and industrial temperature rating. Ensure compatibility with system requirements regarding the 2.7 V to 5.5 V supply range and 7.5 mA operating current. Cross-reference datasheet revision F specifications for accurate performance parameters before finalizing procurement decisions.

Selection Notes

Select this component when a wide dynamic range logarithmic response is required for RF signals up to 500 MHz. The AD8307AN is suitable for applications needing precise signal level conversion without significant external components. Consider the 92 dB dynamic range and 25 mV/dB slope for systems requiring direct decibel representation of input power levels within the specified operational limits.

Part Context

The AD8307 series represents a family of low-cost, high-performance logarithmic amplifiers designed for demodulating RF signals. The AD8307AN variant specifically denotes the industrial temperature grade version packaged in an 8-lead PDIP format. This part is engineered for applications demanding stable scaling over temperature and high linearity across a broad frequency spectrum.

Replacement Considerations

Refer to Table 1 in the datasheet for next-generation upgrades such as the AD8310, ADL5513, or AD8309. Verify functional equivalence regarding dynamic range, bandwidth, and interface compatibility before substituting.