Overview
The AD8018AR-EVAL is an evaluation board designed for the AD8018, a dual, high-speed, low-cost operational amplifier produced by Analog Devices Inc. This amplifier is particularly suited for applications requiring high output current and low distortion, such as in xDSL modems. The AD8018 is fabricated using Analog Devices’ high-speed XFCB (eXtra Fast Complementary Bipolar) process, which ensures high bandwidth and fast slew rates while minimizing distortion and power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage Range | 3.15 V to 12 V |
| Output Current | Up to 400 mA (into 10 Ω differential load) |
| Quiescent Current | 9 mA per amplifier |
| Bandwidth | High bandwidth (specific values depend on configuration) |
| Slew Rate | Fast slew rate (specific values depend on configuration) |
| Output Voltage Swing | Rail-to-rail output, within 0.5 V of supply rails |
| Distortion | Low distortion, –82 dBc out-of-band SFDR |
| Package Options | 8-lead SOIC, 14-lead TSSOP |
| Operating Temperature Range | –40°C to +85°C |
| Power Dissipation | 650 mW (SOIC), 565 mW (TSSOP) |
Key Features
- High output current capability: up to 400 mA into 10 Ω differential load.
- Low distortion: maintains –82 dBc out-of-band SFDR.
- Rail-to-rail output voltage swing: within 0.5 V of the supply rails.
- High bandwidth and fast slew rate: ensures minimal distortion.
- Low power consumption: quiescent current of 9 mA per amplifier.
- Flexible standby and shutdown modes: controlled by two digital logic bits (PWDN1 and PWDN0).
- Stable with capacitive loads and thermal overload protection.
- Compact packaging: available in 8-lead SOIC and 14-lead TSSOP packages.
Applications
- xDSL modems: where high output current and low distortion are essential.
- Line drivers: particularly in single-supply configurations.
- Battery-powered applications: due to low power consumption.
- Industrial and automotive systems: requiring robust performance and wide operating temperature ranges.
Q & A
- What is the primary application of the AD8018 amplifier?
The AD8018 is primarily used in xDSL modems and other applications requiring high output current and low distortion.
- What is the maximum output current of the AD8018?
The AD8018 can drive up to 400 mA of output current into a 10 Ω differential load.
- What is the quiescent current of the AD8018?
The quiescent current of the AD8018 is 9 mA per amplifier.
- What are the package options for the AD8018?
The AD8018 is available in 8-lead SOIC and 14-lead TSSOP packages.
- What is the operating temperature range of the AD8018?
The operating temperature range of the AD8018 is –40°C to +85°C.
- How does the AD8018 manage power consumption?
The AD8018 has flexible standby and shutdown modes controlled by two digital logic bits (PWDN1 and PWDN0), which help in managing power consumption.
- What is the significance of the XFCB process in the AD8018?
The XFCB (eXtra Fast Complementary Bipolar) process ensures high bandwidth and fast slew rates while minimizing distortion and power consumption.
- Is the AD8018 stable with capacitive loads?
Yes, the AD8018 is stable with capacitive loads.
- What is the maximum supply voltage for the AD8018?
The maximum supply voltage for the AD8018 is 12 V.
- Does the AD8018 have thermal overload protection?
Yes, the AD8018 includes thermal overload protection.
