Overview
The AD8139ACPZ-REEL7, produced by 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, which allows for precise control of the output common-mode voltage and outstanding output balance. It is manufactured using Analog Devices' second-generation XFCB process, enabling low levels of distortion and input voltage noise of only 2.25 nV/√Hz.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Noise | 2.25 | nV/√Hz | ||
| Input Offset Voltage | -0.9 | ±0.5 | 0.9 | mV |
| Input Bias Current | 1.3 | 4.2 | 4.5 | µA |
| Common Mode Rejection Ratio (CMRR) | 67 | 74 | 88 | dB |
| Bandwidth | 440 | MHz | ||
| Slew Rate | 150 | V/µs | ||
| Supply Voltage Range | 4.5 | 12 | V | |
| Operating Temperature Range | -40 | 125 | °C | |
| Package Type | 8-Lead LFCSP (3mm x 3mm w/ EP) |
Key Features
- Ultralow noise with input voltage noise of 2.25 nV/√Hz.
- High SFDR and wide bandwidth, making it suitable for driving ADCs up to 18 bits.
- Rail-to-rail output and adjustable output common-mode voltage.
- Internal common-mode feedback architecture for precise output balance and suppression of even-order harmonic distortion.
- Differential input and output, with single-ended-to-differential gain configurations.
- Low offset voltage and input bias current.
- High CMRR and wide supply voltage range (4.5 V to 12 V).
- Available in 8-lead SOIC and LFCSP packages.
Applications
- ADC drivers for resolutions up to 18 bits.
- Single-ended-to-differential converters.
- Differential filters.
- Level shifters.
- Differential PCB drivers.
- Differential cable drivers).
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 is the input voltage noise of the AD8139?
The input voltage noise of the AD8139 is 2.25 nV/√Hz).
- What is the bandwidth of the AD8139?
The bandwidth of the AD8139 is 440 MHz).
- What is the slew rate of the AD8139?
The slew rate of the AD8139 is 150 V/µs).
- What are the available package types for the AD8139?
The AD8139 is available in 8-lead SOIC and LFCSP (3mm x 3mm w/ EP) packages).
- What is the operating temperature range of the AD8139?
The operating temperature range of the AD8139 is -40°C to +125°C).
- How is the output common-mode voltage controlled in the AD8139?
The output common-mode voltage in the AD8139 is controlled by the voltage applied to the VOCM pin).
- What is the common-mode rejection ratio (CMRR) of the AD8139?
The CMRR of the AD8139 is between 67 dB and 88 dB).
- Can the AD8139 be used in single-ended-to-differential configurations?
Yes, the AD8139 can be used in both differential-to-differential and single-ended-to-differential gain configurations).
- What tools are available to support the design with the AD8139?
Analog Devices offers tools such as the Precision ADC Driver Tool, ADI DiffAmpCalc™, and ADIsimRF to support the design and simulation of circuits using the AD8139).
