Overview
The AD8302ARU, produced by Analog Devices Inc., is a fully integrated system designed for measuring gain/loss and phase in various RF/IF applications. This component operates within a frequency range of up to 2.7 GHz and is suitable for numerous receive, transmit, and instrumentation applications. It requires minimal external components and can be powered by a single supply voltage ranging from 2.7 V to 5.5 V. The AD8302ARU features dual demodulating logarithmic amplifiers and a phase detector, enabling accurate measurements of gain and phase with low nonlinearity.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Range | –60 dBm | 0 dBm | |||
| Gain Measurement Range | ±30 dB | ||||
| Gain Measurement Scaling | 30 mV/dB | ||||
| Phase Measurement Range | 0°–180° | ||||
| Phase Measurement Scaling | 10 mV/degree | ||||
| Supply Voltage | 2.7 V | 5.5 V | |||
| Temperature Range | –40°C | +85°C | |||
| Output Bandwidth | DC to 30 MHz | ||||
| Output Drivers Current | Up to 8 mA | ||||
| Reference Voltage | 1.8 V |
Key Features
- Dual demodulating logarithmic amplifiers with a 60 dB measurement range each.
- Accurate gain measurement scaling of 30 mV/dB and phase measurement scaling of 10 mV/degree.
- Typical nonlinearity of less than 0.5 dB for gain and less than 1 degree for phase measurements.
- Operates in measurement, controller, and level comparator modes.
- Single supply operation from 2.7 V to 5.5 V.
- Stable 1.8 V reference voltage output.
- Small signal envelope bandwidth from DC to 30 MHz.
- Output drivers can source or sink up to 8 mA.
- Input impedance of nominally 3 kΩ at low frequencies.
Applications
- RF/IF PA linearization.
- Precise RF power control.
- Remote system monitoring and diagnostics.
- Return loss/VSWR measurements.
- Log ratio function for AC signals.
Q & A
- What is the frequency range of the AD8302ARU?
The AD8302ARU operates within a frequency range of up to 2.7 GHz.
- What is the input range of the AD8302ARU?
The input range is from –60 dBm to 0 dBm in a 50 Ω system.
- How does the AD8302ARU measure gain and phase?
The AD8302ARU uses dual demodulating logarithmic amplifiers and a phase detector to measure gain and phase. The gain is scaled at 30 mV/dB, and the phase is scaled at 10 mV/degree.
- What are the typical nonlinearity values for gain and phase measurements?
The typical nonlinearity is less than 0.5 dB for gain and less than 1 degree for phase measurements.
- What are the operating modes of the AD8302ARU?
The AD8302ARU can operate in measurement, controller, and level comparator modes.
- What is the supply voltage range for the AD8302ARU?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the temperature range for the AD8302ARU?
The temperature range is from –40°C to +85°C.
- What is the output bandwidth of the AD8302ARU?
The output bandwidth is from DC to 30 MHz.
- How much current can the output drivers of the AD8302ARU handle?
The output drivers can source or sink up to 8 mA.
- What is the reference voltage provided by the AD8302ARU?
The AD8302ARU provides a stable 1.8 V reference voltage output.
