ADD8505WRUZ

Overview

The ADD8505WRUZ 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 supports a wide temperature range of −40°C to +105°C. The device features rail-to-rail input and output capabilities, delivering a high output current of 380 mA with a low supply current of 3.9 mA. It maintains stability with 1 nF loads and utilizes a 20-lead thin shrink small outline (TSSOP) package.

Feature Summary

• Features A/B inputs allowing selection between two external gamma voltage curves for each channel.
• Provides high slew rates and strong output drive capability to ensure optimal gray scale and visual performance.
• Designed to drive resistor ladders in LCD column drivers for precise gamma correction.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging options and compliance status. Ensure that the selected variant matches the required thermal characteristics and pin configuration for the intended PCB layout. Cross-reference the component revision history to validate compatibility with existing design specifications.

Selection Notes

Select this component when a five-channel buffer solution is required for driving column driver gamma inputs in line inversion displays. Consider the 20-lead TSSOP package dimensions and the −40°C to +105°C operating temperature range during the design phase. Evaluate the need for automotive qualification if the application demands higher reliability standards beyond standard commercial specifications.

Part Context

This part belongs to the ADD8504/ADD8505/ADD8506 series of multi-channel LCD gamma buffers. While the ADD8504 offers four channels and the ADD8506 provides six, the ADD8505 specifically accommodates five independent buffer channels within a single integrated circuit, sharing common electrical characteristics and package styles across the family.

Replacement Considerations

The ADD8504 and ADD8506 are direct functional alternatives within the same product family, differing only in channel count. Designers must verify pinout compatibility and adjust software or hardware logic to account for the additional or missing channels when substituting these parts.

FAQ

How does the A/B input function operate?

Each buffer channel includes an A/B input switch control. Applying a logic high selects Input A, while a logic low selects Input B, allowing the user to choose between two different gamma voltage curves set by external resistor ladders.

What is the recommended handling for power supply pins?

Due to high peak currents, it is recommended that all GND and VCC pins be connected and suitably bypassed to ensure stable operation and minimize noise interference.