AD8310ACHIPS

Overview

The AD8310ACHIPS is a die-level demodulating logarithmic amplifier from Analog Devices. It provides a voltage output with a rise time under 15 ns and drives up to 25 mA into a grounded load. The device utilizes progressive compression to achieve a 95 dB dynamic range, operating from DC to 440 MHz with ±0.4 dB linearity. It features a +24 mV/dB slope and a −108 dBV intercept. Powered by a single supply of 2.7 V to 5.5 V at 8 mA typical current, it includes a CMOS-compatible enable pin and fully differential dc-coupled signal paths.

Feature Summary

• Multistage demodulating architecture using progressive compression for high-speed signal processing
• High current capacity capable of driving 25 mA into grounded loads within 15 ns
• Fully differential dc-coupled signal path ensuring stability across wide frequency ranges
• CMOS-compatible enable interface allowing fast power-up and low-power sleep modes

Applications

• Conversion of signal levels to decibel form
• Transmitter antenna power measurement
• Receiver signal strength indication (RSSI)
• Low cost radar and sonar signal processing
• Network and spectrum analyzers

Procurement Notes

Verify the specific die configuration and packaging requirements when sourcing bare die components. Confirm that the intended application supports direct die attachment methods rather than standard surface mount packages. Ensure thermal management strategies account for the internal power dissipation limits specified in the datasheet. Validate compatibility with the manufacturing process for handling exposed silicon substrates.

Selection Notes

Select this component for applications requiring wide dynamic range and high-frequency response without external amplification. The integrated demodulation simplifies circuit design by eliminating the need for separate detector stages. Consider the input impedance characteristics when designing matching networks for specific source impedances. The single-supply operation reduces system complexity compared to dual-rail solutions.

Part Context

This part represents the bare die version of the AD8310 family, manufactured on an advanced complementary bipolar process. It retains all functional specifications of the packaged MSOP variant but requires custom integration into the end-user's substrate or package. This form factor allows for miniaturization in specialized RF systems where standard packages are unsuitable.

Replacement Considerations

Direct replacements include other AD8310 variants such as AD8310ARMZ or AD8310ACPZ depending on the required package type. Ensure the substitute maintains the same logarithmic slope and dynamic range specifications. Verify that the replacement offers compatible pinout functionality if transitioning between different package styles.

FAQ

What is the maximum input level the AD8310 can handle?

The maximum input level is specified as 4 dBV single-ended or 20 dBm in a 50 Ω termination.

How does the AD8310 handle low-frequency signals?

It operates down to very low frequencies, including audio ranges, by utilizing an offset compensation loop that can be adjusted via an external capacitor at the OFLT pin.

What is the purpose of the ENBL pin?

The ENBL pin serves as a CMOS-compatible chip enable, allowing the device to be powered down to a sleep current of less than 1 μA when held low.