Overview
The AD8131AR-REEL7, produced by Analog Devices Inc., is a low-cost, high-speed differential driver designed for the transmission of high-speed signals over low-cost twisted pair or coax cables. This component is a significant advancement over traditional op-amps, particularly for driving signals over long lines or for driving differential input ADCs. Manufactured on Analog Devices' next-generation XFCB bipolar process, the AD8131 offers a -3 dB bandwidth of 400 MHz and delivers differential signals with very low harmonic distortion. It is available in both SOIC and MSOP packages, ensuring operation over a wide temperature range of -40°C to +125°C.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| -3 dB Bandwidth | 400 MHz | - |
| Fixed Gain | 2 | - |
| Output Impedance | Very low | - |
| Common-Mode Rejection Ratio (CMRR) | -60 dB at 10 MHz | VS = ±5 V, VOCM = 0 V, G = 2, RL, dm = 200 Ω |
| Operating Temperature Range | -40°C to +125°C | - |
| Package Types | SOIC, MSOP | - |
Key Features
- Internal Feedback Feature: Provides output gain and phase matching, reducing radiated EMI and suppressing harmonics.
- High-Speed Signal Transmission: Capable of transmitting high-speed signals over Cat3 or Cat5 twisted pair or coax cables with minimal line attenuation.
- Adjustable Common-Mode Level: The common-mode level of the differential output is adjustable via the VOCM pin, allowing easy level-shifting for single-supply ADCs with dual supply signals.
- Low Harmonic Distortion: Delivers differential signals with very low harmonic distortion.
- Compact and Reliable: Smaller and more reliable than transformer-based solutions, with no susceptibility to magnetic interference and hysteresis.
Applications
- High-Speed Data Transmission: Suitable for analog or digital video signals and other high-speed data transmission applications.
- Differential Input ADCs: Optimizes the distortion performance of differential input ADCs by providing balanced differential outputs.
- Long-Line Signal Driving: Ideal for driving signals over long lines, reducing the need for external components.
- Replacement for Transformers: Can replace transformers in various applications, preserving low frequency and DC information without the drawbacks of transformers.
Q & A
- What is the primary function of the AD8131AR-REEL7?
The AD8131AR-REEL7 is a differential driver designed for the transmission of high-speed signals over low-cost twisted pair or coax cables.
- What is the -3 dB bandwidth of the AD8131AR-REEL7?
The -3 dB bandwidth of the AD8131AR-REEL7 is 400 MHz.
- What are the available package types for the AD8131AR-REEL7?
The AD8131AR-REEL7 is available in both SOIC and MSOP packages.
- How does the AD8131AR-REEL7 reduce radiated EMI?
The AD8131AR-REEL7 reduces radiated EMI through its internal feedback feature that provides output gain and phase matching balanced to -60 dB at 10 MHz.
- What is the operating temperature range of the AD8131AR-REEL7?
The operating temperature range of the AD8131AR-REEL7 is -40°C to +125°C.
- Can the AD8131AR-REEL7 be used to drive differential input ADCs?
Yes, the AD8131AR-REEL7 is optimized for driving differential input ADCs, providing balanced differential outputs that enhance the distortion performance of the ADCs.
- How does the AD8131AR-REEL7 adjust the common-mode level of the differential output?
The common-mode level of the differential output is adjustable via the VOCM pin, allowing for easy level-shifting for single-supply ADCs with dual supply signals.
- What are the advantages of using the AD8131AR-REEL7 over transformer-based solutions?
The AD8131AR-REEL7 is smaller, more reliable, and not susceptible to magnetic interference and hysteresis, making it a superior choice over transformer-based solutions.
- Can the AD8131AR-REEL7 be used for both analog and digital video signals?
Yes, the AD8131AR-REEL7 can be used for both analog and digital video signals as well as other high-speed data transmission applications.
- How does the AD8131AR-REEL7 handle line attenuation?
The AD8131AR-REEL7 is capable of driving signals over Cat3 or Cat5 twisted pair or coax cables with minimal line attenuation.
