AD8307 Logarithmic Amplifier IC Chip

AD8307(Low Cost, DC to 500 MHz, 92 dB,Logarithmic Amplifier)

Introduction

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 (succssive 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. The device requires a single-supply voltage of 2.7V to 5.5V, with a current consumption of 7.5 mA. 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.

Feature

• 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

Appearance