ADD8505WRUZ-REEL7

Overview

The ADD8505WRUZ-REEL7 is a 5-channel LCD gamma reference buffer designed for line inversion panels. It operates on a single supply voltage ranging from 3.3 V to 6.5 V and features rail-to-rail input and output capabilities. The device provides high output current with a short-circuit current of up to 380 mA and low supply current of 4.4 mA. It maintains stability with capacitive loads up to 1 nF and supports a wide operating temperature range from −40°C to +105°C. Packaged in a 20-lead Pb-free TSSOP, it includes A/B inputs for selecting between two gamma voltage curves.

Feature Summary

• Features five independent buffer channels with A/B input selection for dual gamma curve switching.
• Delivers high output drive capability with a maximum short-circuit current of 380 mA.
• Operates stably with capacitive loads up to 1 nF while maintaining low power consumption.
• Supports rail-to-rail input and output operation across the full supply voltage range.

Applications

• LCD line inversion gamma references
• Car navigation panels
• Personal media player panels

Procurement Notes

Verify the specific package option and reel size when ordering. Confirm that the component meets RoHS compliance requirements for your manufacturing process. Ensure compatibility with the intended operating temperature range and supply voltage specifications before integration into the final design.

Selection Notes

Select this component for designs requiring multiple buffered gamma outputs in a compact surface-mount package. Consider the 20-lead TSSOP footprint and thermal characteristics during PCB layout. Evaluate the need for A/B input switching functionality to support different gamma correction profiles within the application.

Part Context

This part belongs to the ADD8504/ADD8505/ADD8506 family of LCD gamma buffers. While the ADD8504 offers four channels and the ADD8506 provides six, the ADD8505 specifically delivers five buffered channels. All variants share similar electrical characteristics and are designed to drive column driver resistor ladders for optimal display performance.

Replacement Considerations

The ADD8504WRUZ-REEL7 and ADD8506WRUZ-REEL7 are direct functional substitutes within the same series, differing only in channel count. Designers must verify pinout compatibility and adjust software logic if the number of available gamma outputs changes significantly.

FAQ

What is the function of the A/B input on each channel?

The A/B input allows the selection between two different gamma voltage curves (Input A or Input B) for each buffer channel, enabling flexible gamma correction control.

Is the ADD8505 stable with capacitive loads?

Yes, the device is specified to be stable with capacitive loads up to 1 nF without requiring external compensation components.