Catalog
Low Cost, DC to 500 MHz, 92 dB Logarithmic Amplifier
| Part | Type | Package / Case | Package / Case | Applications | Mounting Type | Supplier Device Package | Package / Case |
|---|---|---|---|---|---|---|---|
Analog Devices Inc AD8307ARZ-REEL | Logarithmic Amplifier | 3.9 mm | 8-SOIC | Receiver Signal Strength Indication (RSSI) | Surface Mount | 8-SOIC | |
Analog Devices Inc AD8307AN | Logarithmic Amplifier | 0.3 in | 8-DIP | Receiver Signal Strength Indication (RSSI) | Through Hole | 8-PDIP | 7.62 mm |
Analog Devices Inc AD8307ARZ | Logarithmic Amplifier | 3.9 mm | 8-SOIC | Receiver Signal Strength Indication (RSSI) | Surface Mount | 8-SOIC |
Key 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
Description
AI
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 CMOS-compatible 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.ApplicationsConversion of signal level to decibel formTransmitter antenna power measurementReceiver signal strength indication (RSSI)Low cost radar and sonar signal processingNetwork and spectrum analyzers (to 120 dB)Signal level determination down to 20 HzTrue decibel ac mode for multimeters