ADI AD8313ARMZ

The AD8313 is a complete multistage demodulating logarithmic amplifier that can accurately convert an RF signal at its input to an equivalent decibel-scaled value at its dc output. The AD8313 maintains a high degree of log conformance for signal frequencies from 0.1 GHz to 2.5 GHz. Application is straightforward, requiring only a single supply of 2.7 V to 5.5 V and the addition of a suitable input and supply decoupling. Operating on a 3V supply, its 13.7 mA consumption (for TA = 25℃) is only 41 mW. A power-down feature is provided; the input is taken high to initiate a low current (20 μA) sleep mode, with a threshold at half the supply voltage. The AD8313 is fabricated on Analog Devices, Inc., advanced 25 GHz silicon bipolar IC process and is available in an 8-lead MSOP package. The operating temperature range is -40℃ to +85℃.

• Wide bandwidth: 0.1 GHz to 2.5 GHz min
• High dynamic range: 70 dB to ±3.0 dB
• High accuracy: ±1.0 dB over 65 dB range (@ 1.9 GHz)
• Fast response: 40 ns full-scale typical
• Controller mode with error output
• Scaling stable over supply and temperature
• Wide supply range: 2.7 V to 5.5 V
• Low power: 40 mW at 3 V
• Power-down feature: 60 mW at 3 V
• Complete and easy to use

• RF transmitter power amplifier setpoint control and level monitoring
• Logarithmic amplifier for RSSI measurement cellular base stations, radio link, radar