ADD8505WRUZ-REEL

Overview

The ADD8505WRUZ-REEL7 is a five-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 up to 380 mA and low supply current of approximately 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 muxed A/B inputs allowing selection between two external resistor ladder gamma voltage curves.
• Provides high slew rates and strong output drive capability to ensure reference ladder stability.
• Supports stable operation with capacitive loads up to 1 nF.
• Qualified for automotive applications with controlled manufacturing standards.

Applications

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

Procurement Notes

Verify the specific package option RU-20 and tape-and-reel quantity against the official ordering guide. Confirm RoHS compliance status indicated by the Z suffix. Ensure the component meets the required thermal resistance characteristics for the intended PCB layout. Cross-reference the datasheet revision D specifications with the final design requirements before integration.

Selection Notes

Select this component when driving column driver gamma inputs in line inversion displays requiring muxed curve selection. Compare channel count against ADD8504 (4-channel) or ADD8506 (6-channel) variants based on display resolution needs. Evaluate power supply constraints against the 3.3 V to 6.5 V operational range. Consider the 20-lead TSSOP footprint for board space limitations.

Part Context

This part belongs to the ADD8504/ADD8505/ADD8506 family of LCD gamma buffers. It serves as the five-channel variant within this series, positioned between the four-channel ADD8504 and six-channel ADD8506 models. All family members share identical electrical characteristics and pinout logic, differing only in channel count and package lead configuration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices directly for alternative sourcing options or updated product recommendations if this specific reel version is discontinued.

FAQ

How does the A/B input function operate?

The A/B input acts as a switch control where a logic high selects Input A (INAx) and a logic low selects Input B (INBx), allowing the buffer to alternate between two different gamma voltage curves set by external resistors.

What is the maximum capacitive load the device can drive?

The ADD8505 is specified to be stable with capacitive loads up to 1 nF without requiring additional compensation components.