Overview
The AD8315ARMZ, 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 offers a typical dynamic range of 50 dB. This device is particularly suited for use in cellular handsets and other battery-operated wireless devices, providing a temperature-stable linear-in-dB response 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 |
| Quiescent Current (ENBL high) | 8.5 | 10.7 | - | mA |
| Disable Current (ENBL low) | 4 | - | 10 | 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, with a power-down mode to 10.8 μW.
- Low noise bandgap reference output and rail-to-rail buffer.
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 AD8315ARMZ? The AD8315ARMZ operates within the frequency range of 0.1 GHz to 2.5 GHz.
- What is the typical dynamic range of the AD8315ARMZ? The typical dynamic range is 50 dB.
- What is the logarithmic slope of the AD8315ARMZ? The logarithmic slope is 23 mV/dB.
- What is the supply voltage range for the AD8315ARMZ? The supply voltage range is from 2.7 V to 5.5 V.
- How much current does the AD8315ARMZ consume in quiescent mode? The quiescent current is 8.5 mA to 10.7 mA when ENBL is high.
- What is the disable current when ENBL is low? The disable current is 4 μA to 10 μA when ENBL is low.
- What are the key applications of the AD8315ARMZ? Key applications include single, dual, and triple band mobile handsets and transmitter power control in cellular handsets.
- How does the AD8315ARMZ handle temperature variations? The AD8315ARMZ provides a temperature-stable linear-in-dB response over a range of -30°C to +85°C.
- What is the output voltage range of the VAPC pin? The VAPC output voltage can swing from 250 mV above ground to within 200 mV below the supply voltage.
- How much load current can the VAPC pin support? The VAPC pin can support load currents up to 6 mA.
