Overview
The AD8361ARM, produced by Analog Devices Inc., is a mean-responding power detector designed for accurate measurement of RF power in high-frequency signal chains. This device is particularly useful for measuring high crest-factor signals, such as those found in CDMA, W-CDMA, and QAM modulation waveforms. It operates over a frequency range of 100 MHz to 2.5 GHz and is suitable for use in RF transmitter and receiver power measurement applications.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V |
| Supply Current | 1.1 mA |
| Frequency Range | 100 MHz to 2.5 GHz |
| Input Range | 0 to 700 mV |
| Accuracy | ±0.25 dB |
| Operating Temperature | −40°C to +85°C |
| Package Type | 8-lead MSOP, 8-lead TSSOP |
Key Features
- True power measurement of simple and complex waveforms.
- Three operating modes: Ground reference, Internal reference, and Supply reference.
- Linear-responding DC output voltage with a conversion gain of 7.5 V/V rms.
- External filter capacitor can be added to increase the averaging time constant.
- Low power consumption with rapid power-down to less than 1 µA.
- Fabricated on a proprietary high fT silicon bipolar process.
Applications
- Measurement of CDMA, W-CDMA, QAM, and other complex modulation waveforms.
- RF transmitter or receiver power measurement.
- High-frequency receiver and transmitter signal chains.
Q & A
- What is the frequency range of the AD8361ARM?
The AD8361ARM operates over a frequency range of 100 MHz to 2.5 GHz.
- What are the supply voltage and current requirements for the AD8361ARM?
The supply voltage is 2.7 V to 5.5 V, and the supply current is 1.1 mA.
- What types of waveforms can the AD8361ARM measure?
The AD8361ARM can measure simple and complex waveforms, including those with high crest factors like CDMA and W-CDMA.
- What are the operating modes of the AD8361ARM?
The AD8361ARM has three operating modes: Ground reference, Internal reference, and Supply reference.
- How accurate is the AD8361ARM in measuring RF power?
The AD8361ARM has an accuracy of ±0.25 dB.
- What is the operating temperature range of the AD8361ARM?
The operating temperature range is −40°C to +85°C.
- What types of packages are available for the AD8361ARM?
The AD8361ARM is available in 8-lead MSOP and 8-lead TSSOP packages.
- Can the AD8361ARM be powered down to a low current state?
Yes, the AD8361ARM can be powered down to less than 1 µA.
- How does the AD8361ARM achieve true power measurement?
The AD8361ARM uses a proprietary technique involving two identical squaring cells balanced by a high-gain error amplifier to achieve true power measurement.
- Can an external filter capacitor be used with the AD8361ARM?
Yes, an external filter capacitor can be added to increase the averaging time constant.
