Overview
The AD8139ARD from Analog Devices Inc. is an ultralow noise, high-performance differential amplifier designed with rail-to-rail output. This amplifier is ideal for driving analog-to-digital converters (ADCs) with resolutions up to 18 bits due to its low noise, high Spurious-Free Dynamic Range (SFDR), and wide bandwidth. The AD8139 features an internal common-mode feedback architecture, allowing for precise control over the output common-mode voltage and excellent output balance. It is manufactured using Analog Devices' second-generation XFCB process, which ensures low levels of distortion and an input voltage noise of only 2.25 nV/√Hz.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | -3.8 | +3.8 | V | |
| Input Resistance | 3.5 | MΩ | ||
| Input Offset Voltage | -900 | ±300 | +900 | µV |
| Input Voltage Noise (f = 100 kHz) | 3.5 | nV/√Hz | ||
| Input Bias Current | 1.3 | 4.5 | µA | |
| CMRR (ΔVOCM/ΔVO, dm) | 74 | 88 | dB | |
| Operating Supply Voltage Range | +4.5 | +12 | V | |
| Quiescent Current | 21.5 | 24.5 | 25.5 | mA |
| Operating Temperature Range | -40 | +125 | °C | |
| Output Current (Each single-ended output) | 80 | mA | ||
| Slew Rate (VO, cm = 2 V p-p) | 150 | V/µs | ||
| -3 dB Bandwidth (VO, cm = 0.1 V p-p) | 440 | MHz |
Key Features
- Low Noise: Input voltage noise of only 2.25 nV/√Hz, making it suitable for high-precision applications.
- Rail-to-Rail Output: Allows the output to swing from the negative to the positive supply rail, maximizing dynamic range.
- High SFDR and Wide Bandwidth: Ensures high signal integrity and supports high-frequency signal processing.
- Internal Common-Mode Feedback Architecture: Enables precise control over the output common-mode voltage and provides excellent output balance and suppression of even-order harmonic distortion products.
- Differential and Single-Ended-to-Differential Operation: Flexible gain configurations using simple external feedback networks consisting of four resistors.
- Low Power Consumption: Quiescent current of 24.5 mA and low input static voltage, ensuring low-power performance.
- Wide Supply Voltage Range: Operates from 5 V to 12 V, enhancing adaptability in various applications.
- Compact Packaging: Available in 8-lead SOIC and 3 mm × 3 mm LFCSP packages, suitable for small circuit boards and mass production.
Applications
- ADC Drivers: Ideal for driving analog-to-digital converters with resolutions up to 18 bits.
- Laboratory and Testing Equipment: Used in signal amplification, frequency conversion, and noise control in laboratory testing equipment and measuring instruments.
- Medical Field: Used in medical devices and diagnostic systems to process and enhance signals for improved accuracy and precision.
- Audio Processing: Enhances the volume and clarity of sound in sound systems, headphones, and speakers.
- Video Equipment: Used to enhance the brightness and contrast of video signals in TVs, monitors, and projectors.
- Industrial Automation: Used in industrial control equipment, measuring instruments, robots, and other fields for precise control and measurement of various parameters.
Q & A
- What is the primary application of the AD8139ARD?
The AD8139ARD is primarily used as a differential amplifier for driving analog-to-digital converters (ADCs) with resolutions up to 18 bits.
- What is the input voltage noise of the AD8139ARD?
The input voltage noise of the AD8139ARD is 2.25 nV/√Hz.
- What are the available package options for the AD8139ARD?
The AD8139ARD is available in 8-lead SOIC and 3 mm × 3 mm LFCSP packages.
- What is the operating temperature range of the AD8139ARD?
The operating temperature range of the AD8139ARD is from -40°C to +125°C.
- What is the quiescent current of the AD8139ARD?
The quiescent current of the AD8139ARD is 24.5 mA.
- Can the AD8139ARD be used in single-ended-to-differential configurations?
Yes, the AD8139ARD can be used in both differential and single-ended-to-differential gain configurations.
- What is the slew rate of the AD8139ARD?
The slew rate of the AD8139ARD is 150 V/µs.
- What is the -3 dB bandwidth of the AD8139ARD?
The -3 dB bandwidth of the AD8139ARD is 440 MHz.
- Is the AD8139ARD suitable for medical device applications?
Yes, the AD8139ARD is used in certain medical devices and diagnostic systems to enhance signal accuracy and precision.
- Can the AD8139ARD be used in industrial automation?
Yes, the AD8139ARD is used in industrial control equipment, measuring instruments, and robots for precise control and measurement.
