Overview
The AD8138AR-REEL, produced by Analog Devices Inc., is a high-performance differential amplifier designed to simplify differential signal processing. It can function as a single-ended-to-differential amplifier or as a differential-to-differential amplifier, making it highly versatile. Manufactured using the proprietary ADI XFCB bipolar process, the AD8138AR-REEL offers a -3 dB bandwidth of up to 320 MHz and delivers differential signals with minimal harmonic distortion. This component is particularly useful for driving high-performance ADCs, eliminating the need for transformers and preserving low-frequency and DC information.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| -3 dB Bandwidth | 220 | 310 | - | MHz |
| Slew Rate | - | 250 | - | V/μs |
| Input Voltage Noise (RTI) | - | 17 | - | nV/√Hz |
| Input Resistance (Differential) | - | 6 MΩ | - | - |
| Input Common-Mode Voltage | -4.7 | - | 3.4 | V |
| Output Voltage Swing (Single-Ended) | - | 7.75 | - | V p-p |
| Power Supply Range | 2.7 | - | 11 | V |
| Quiescent Current | 15 | 20 | 21 | mA |
| Operating Temperature Range | -55 | - | 105 | °C |
Key Features
- High Bandwidth and Low Distortion: The AD8138AR-REEL offers a -3 dB bandwidth of up to 320 MHz and delivers differential signals with minimal harmonic distortion, making it ideal for high-speed applications.
- Single-Ended to Differential Conversion: It can easily convert single-ended signals to differential signals, which is crucial for driving high-performance ADCs.
- Common-Mode Level-Shifting: The component can perform common-mode level-shifting, allowing for DC coupling and level-shifting of bipolar signals without inverting the input signal.
- Internal Feedback and Gain Matching: The internal feedback feature ensures balanced output gain and phase matching, suppressing even-order harmonics and minimizing gain errors.
- High Input Impedance and Low Output Impedance: Similar to op amps, it has high input impedance and low output impedance, making it easy to use in various configurations.
Applications
- High-Performance ADC Drivers: The AD8138AR-REEL is particularly useful for driving high-performance ADCs, ensuring optimal performance by preserving low-frequency and DC information.
- Signal Processing and Amplification: It can be used for single-ended-to-differential conversion, common-mode level-shifting, and amplification of differential signals.
- Audio and Video Systems: Its high bandwidth and low distortion make it suitable for audio and video applications where signal integrity is critical.
- Instrumentation and Measurement: The component can be used in high-speed instrumentation applications where balanced outputs and low distortion are essential.
Q & A
- What is the primary function of the AD8138AR-REEL?
The AD8138AR-REEL is a differential amplifier that can function as a single-ended-to-differential amplifier or as a differential-to-differential amplifier.
- What is the bandwidth of the AD8138AR-REEL?
The -3 dB bandwidth of the AD8138AR-REEL is up to 320 MHz.
- How does the AD8138AR-REEL handle common-mode level-shifting?
The component can perform common-mode level-shifting, allowing for DC coupling and level-shifting of bipolar signals without inverting the input signal.
- What is the input impedance of the AD8138AR-REEL?
The input impedance is 6 MΩ for differential inputs.
- What is the output voltage swing of the AD8138AR-REEL?
The output voltage swing is up to 7.75 V p-p for single-ended output.
- What is the operating temperature range of the AD8138AR-REEL?
The operating temperature range is -55°C to +105°C.
- How does the internal feedback feature of the AD8138AR-REEL work?
The internal feedback feature ensures balanced output gain and phase matching, suppressing even-order harmonics and minimizing gain errors.
- What are some common applications of the AD8138AR-REEL?
Common applications include driving high-performance ADCs, signal processing, audio and video systems, and instrumentation and measurement.
- What is the power supply range for the AD8138AR-REEL?
The power supply range is from 2.7 V to 11 V.
- What is the quiescent current of the AD8138AR-REEL?
The quiescent current is between 15 mA and 21 mA.
