AD8075ARUZ

Overview

The AD8075ARUZ is a high-speed triple video buffer with a fixed voltage gain of +2, manufactured by Analog Devices Inc. It operates on dual ±5 V supplies and features a –3 dB full signal bandwidth exceeding 450 MHz, reaching 600 MHz at 200 mV p-p output. The device exhibits a slew rate of 1350 V/µs and a fast settling time of 4 ns to 0.1%. Key performance metrics include 0.01% differential gain error, 0.01° differential phase error, and 0.1 dB gain flatness up to 50 MHz. It offers superior isolation with all-hostile crosstalk better than –80 dB at 10 MHz and OFF isolation better than 90 dB. Quiescent current is less than 30 mA, and it includes a fast output disable feature.

Feature Summary

• Triple-channel architecture providing independent buffering for RGB signals with a fixed gain of +2.
• High-speed fully buffered inputs and outputs optimized for maintaining bandwidth under large signal conditions.
• Integrated fast output disable feature allows outputs to enter a high-impedance state for matrix applications.
• Excellent video specifications including low differential gain/phase error and high channel-to-channel isolation.

Applications

• RGB buffering in LCD and plasma displays
• RGB driver circuits
• Video routers and multiplexers

Procurement Notes

Verify the specific ordering suffix 'Z' indicates RoHS compliance when sourcing this component. Confirm the package type is the 16-lead Thin Shrink Small Outline Package (RU-16). Ensure the operating temperature range meets requirements for -40°C to +85°C. Cross-reference the datasheet revision to ensure pinout and electrical characteristics match the design specifications.

Selection Notes

Select the AD8075ARUZ when a gain of +2 is required for triple-channel video buffering. Choose this over the AD8074 if the application demands signal amplification rather than unity gain. Consider the device's high slew rate and bandwidth for driving long cables or high-resolution displays. Evaluate the power consumption and thermal dissipation capabilities within the TSSOP package for the specific enclosure constraints.

Part Context

The AD8075ARUZ belongs to the AD8074/AD8075 family of high-speed video buffers from Analog Devices. While the AD8074 provides unity gain (+1), the AD8075 is configured for a gain of +2. Both share identical pinouts, packages, and general performance characteristics, differing primarily in their internal feedback networks. This family is designed for professional video applications requiring precise signal integrity and low distortion.

Replacement Considerations

The AD8074 serves as a functional substitute if unity gain (+1) is acceptable instead of the required +2 gain. Other parts require verification of bandwidth, slew rate, and package compatibility against the AD8075ARUZ specifications.

FAQ

How does the output disable feature function in the AD8075?

The OE (Output Enable) pin controls the state of all three channels. When OE is logic high, the outputs enter a high-impedance state, minimizing loading on shared buses. When OE is logic low, the buffers operate normally with a gain of +2.

What is the impact of capacitive load on the AD8075ARUZ performance?

Large reactive loads can cause overshoot and ringing. The datasheet recommends using series resistors (10 Ω–50 Ω) at the output to isolate the emitter-follower buffer from capacitive loads to maintain stability and settling time.