Overview
The AD8139ACPZ-R2 is an ultralow noise, high-performance differential amplifier produced by Analog Devices Inc. It is designed with rail-to-rail output and is particularly suited for driving analog-to-digital converters (ADCs) with resolutions up to 18 bits. The AD8139 leverages Analog Devices' proprietary second-generation XFCB process, enabling it to achieve low levels of distortion and high signal fidelity. Its internal common-mode feedback architecture allows for adjustable output common-mode voltage, making it versatile for various applications. The device is available in both 8-lead SOIC and 3 mm × 3 mm LFCSP packages, with an exposed paddle for improved thermal performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | -3.8 | +3.8 | V | |
| Input Resistance | 3.5 | MΩ | ||
| Input Offset Voltage (VOS) | -1.0 | ±0.45 | +1.0 | mV |
| Input Voltage Noise (f = 100 kHz) | 3.5 | nV/√Hz | ||
| Input Bias Current | 1.3 | 4.2 | µA | |
| CMRR (ΔVOCM/ΔVO, dm) | 67 | 79 | dB | |
| Supply Voltage Range | +4.5 | +12 | V | |
| Quiescent Current | 21.5 | 25.5 | mA | |
| Operating Temperature Range | -40 | +125 | °C | |
| Output Balance Error (f = 1 MHz) | -70 | dB | ||
| Slew Rate (VO, cm = 2 V p-p) | 150 | V/µs | ||
| Bandwidth (−3 dB, VO, cm = 0.1 V p-p) | 440 | MHz |
Key Features
- Low Noise and High SFDR: The AD8139 features ultralow noise and high spurious-free dynamic range (SFDR), making it ideal for high-precision applications.
- Rail-to-Rail Output: The amplifier provides rail-to-rail output, ensuring maximum signal swing and dynamic range.
- Adjustable Output Common-Mode Voltage: The output common-mode voltage can be controlled by the voltage applied to the VOCM pin, enhancing flexibility in circuit design.
- Differential and Single-Ended-to-Differential Operation: The AD8139 supports both differential and single-ended-to-differential gain configurations.
- Wide Supply Voltage Range: The device operates over a wide supply voltage range of 5 V to 12 V.
- Compact Packaging: Available in 8-lead SOIC and 3 mm × 3 mm LFCSP packages with an exposed paddle for thermal management.
- High Bandwidth and Slew Rate: Features a high bandwidth of 440 MHz and a slew rate of 150 V/µs.
Applications
- ADC Drivers: Ideal for driving analog-to-digital converters (ADCs) with resolutions up to 18 bits.
- Single-Ended-to-Differential Converters: Converts single-ended signals to differential signals, useful in various signal processing applications.
- Differential Filters and Level Shifters: Can be used in differential filter circuits and as level shifters for high-speed signal processing.
- Differential PCB and Cable Drivers: Suitable for driving differential signals in PCB and cable applications.
- Video and High-Speed Signal Processing: Used in video and other high-speed signal processing applications due to its high bandwidth and low noise characteristics.
Q & A
- What is the primary application of the AD8139?
The AD8139 is primarily used as a driver for analog-to-digital converters (ADCs) with resolutions up to 18 bits.
- What are the key features of the AD8139's output stage?
The AD8139 features a rail-to-rail output stage with adjustable output common-mode voltage and high bandwidth.
- What is the input voltage range of the AD8139?
The input voltage range of the AD8139 is from -3.8 V to +3.8 V.
- What is the typical input voltage noise of the AD8139?
The typical input voltage noise of the AD8139 is 3.5 nV/√Hz at 100 kHz.
- What are the available package options for the AD8139?
The AD8139 is available in 8-lead SOIC and 3 mm × 3 mm LFCSP packages with an exposed paddle.
- What is the operating temperature range of the AD8139?
The operating temperature range of the AD8139 is from -40°C to +125°C.
- How does the AD8139 control its output common-mode voltage?
The output common-mode voltage of the AD8139 can be controlled by the voltage applied to the VOCM pin.
- What is the slew rate of the AD8139?
The slew rate of the AD8139 is 150 V/µs for a 2 V p-p output signal.
- What are some common applications of the AD8139 besides ADC drivers?
Besides ADC drivers, the AD8139 is used in single-ended-to-differential converters, differential filters, level shifters, and differential PCB and cable drivers.
- What is the bandwidth of the AD8139?
The bandwidth of the AD8139 is 440 MHz for a 0.1 V p-p output signal.
