Overview
The AD8315ARMZ-RL, produced by Analog Devices Inc., is a complete low-cost subsystem designed for the precise control of RF power amplifiers. It operates within the frequency range of 0.1 GHz to 2.5 GHz and covers a typical dynamic range of 50 dB. This component is particularly suited for use in cellular handsets and other battery-operated wireless devices, offering excellent temperature stability and high sensitivity for low signal levels.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Frequency Range | 0.1 | 2.5 | GHz | |
| Input Voltage Range | −57 | −11 | dBV | |
| Equivalent dBm Range | −44 | +2 | dBm | |
| Logarithmic Slope | 21.5 | 23 | 25.5 | mV/dB |
| Logarithmic Intercept | −79 | −70 | −64 | dBV |
| RF Input Resistance | 2.8 | kΩ | ||
| RF Input Capacitance | 0.9 | pF | ||
| Supply Voltage | 2.7 | 5.5 | V | |
| Supply Current | 8.5 | mA | ||
| Power-Down Current | 4 | μA |
Key Features
- Temperature-stable linear-in-dB response over a range of −30°C to +85°C.
- High sensitivity allowing control at low signal levels.
- Internally ac-coupled signal with a high-pass corner at approximately 0.016 GHz.
- Voltage output (VAPC) with a range from 250 mV above ground to within 200 mV below the supply voltage, supporting load currents up to 6 mA.
- Low power consumption: 20 mW at 2.7 V and 38 mW at 5 V.
- Power-down mode with a sleep current of 4 μA.
- Available in MSOP and LFCSP packages.
Applications
- Single, dual, and triple band mobile handsets (GSM, DCS, EDGE).
- Transmitter power control in cellular handsets and other battery-operated wireless devices.
Q & A
- What is the frequency range of the AD8315?
The AD8315 operates in the frequency range of 0.1 GHz to 2.5 GHz. - What is the typical dynamic range of the AD8315?
The typical dynamic range is 50 dB. - What is the logarithmic slope of the AD8315?
The logarithmic slope is nominally 23 mV/dB. - What is the logarithmic intercept of the AD8315?
The logarithmic intercept is nominally −60 dBm at 0.9 GHz. - What are the supply voltage and current requirements of the AD8315?
The supply voltage range is 2.7 V to 5.5 V, and the typical supply current is 8.5 mA. - How does the AD8315 handle power-down mode?
In power-down mode, the sleep current is 4 μA. - What are the package options for the AD8315?
The AD8315 is available in MSOP and LFCSP packages. - What is the temperature stability range of the AD8315?
The temperature stability range is −30°C to +85°C. - What is the input resistance and capacitance of the RF input interface?
The input resistance is 2.8 kΩ, and the input capacitance is 0.9 pF at 0.1 GHz. - What is the range of the voltage output (VAPC)?
The voltage output (VAPC) ranges from 250 mV above ground to within 200 mV below the supply voltage.
