Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Function | Demodulating logarithmic detector/controller |
| Frequency range | 0.1 GHz to 2.5 GHz |
| Dynamic range | 70 dB to ±3 dB |
| High-accuracy range | ±1 dB over 65 dB at 1.9 GHz |
| Full-scale response | About 40 ns typical |
| Supply voltage | 2.7 V to 5.5 V |
| Typical current | 13.7 mA at 3 V |
| Package | 8-lead MSOP |
Product Overview
The AD8313ARMZ-REEL7 is the tape-and-reel 8-lead MSOP version of Analog Devices’ AD8313 logarithmic RF detector/controller. It converts RF input level into a decibel-scaled output voltage from 100 MHz to 2.5 GHz and can also be used inside a feedback loop to regulate an RF amplifier.
A major selection advantage is the wide logarithmic range: Analog Devices specifies 70 dB dynamic range to ±3 dB and ±1 dB accuracy over 65 dB at 1.9 GHz. This makes the part useful for received-signal-strength measurement or transmitter power control where logarithmic response over several decades matters more than true-rms waveform independence.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| Detector type | Demodulating logarithmic amplifier |
| Frequency range | 0.1 GHz to 2.5 GHz |
| Dynamic range | 70 dB to ±3 dB |
| Accuracy range at 1.9 GHz | ±1 dB over 65 dB |
| Typical full-scale response | 40 ns |
| Supply voltage | 2.7 V to 5.5 V |
| Typical current at 3 V | 13.7 mA |
| Power-down current | About 20 µA |
| Operating temperature | -40°C to +85°C |
| Package | 8-lead MSOP |
| Product status | Production |
Design Considerations
The logarithmic transfer function is frequency dependent, so intercept and slope calibration should be based on the actual operating band when absolute power accuracy matters. A system that spans multiple bands may need frequency-specific calibration constants.
The AD8313 measures logarithmic envelope power rather than true rms power. Complex modulation with changing crest factor can therefore produce a different result from a TruPwr detector such as AD8361 or AD8362, even when the average RF power is the same.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
