AD8509ARUZ-REEL

Overview

The AD8509ARUZ-REEL is a nine-channel LCD reference voltage driver manufactured by Analog Devices Inc. Designed for driving column drivers in displays with up to 64 grayscale levels, each buffer features an A/B input for selecting between two LCD display voltages to drive ladder resistors for gamma correction. The device operates on a single power supply ranging from 3.3 V to 6.5 V. It delivers a high output current of 300 mA and maintains a low quiescent supply current of 6 mA. The component can stably drive capacitive loads up to 1000 pF. Key electrical parameters include a slew rate of 7 V/µs, an input offset voltage of 20 mV, and an input bias current of 50 nA. It is housed in a 48-pin TSSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Nine-channel architecture designed specifically for LCD column driver applications
• High output current capability of 300 mA for stable reference ladder driving
• Integrated A/B input selection for precise gamma correction voltage control
• Low power consumption with 6 mA supply current while supporting 1000 pF capacitive loads

Applications

• LCD row inversion gamma reference circuits
• Driving resistor ladders for 64-level grayscale LCD displays
• Column driver voltage reference generation in liquid crystal panels

Procurement Notes

Verify the specific suffix and packaging configuration when sourcing, as availability may vary between reel, cut tape, or tube formats depending on the distributor. Confirm that the 48-pin TSSOP package matches the target PCB footprint and thermal requirements. Ensure the single-supply voltage range of 3.3 V to 6.5 V aligns with the system design constraints. Check for any lead-free or RoHS compliance documentation if required by the manufacturing process. Cross-reference the part number with official Analog Devices documentation to confirm pinout compatibility with legacy designs.

Selection Notes

Select this component when designing LCD systems requiring multiple buffered reference voltages for gamma correction. It is suitable for applications needing high drive strength to maintain stability across large capacitive loads typical in display interfaces. Consider its low quiescent current for battery-operated devices where power efficiency is critical. Verify that the 20 mV input offset voltage meets the precision requirements for the specific grayscale accuracy needed. Ensure the operating temperature range covers the intended environmental conditions of the final product.

Part Context

The AD8509 belongs to a family of specialized display driver ICs from Analog Devices, distinct from their general-purpose operational amplifiers like the AD8504 or AD8609 series. While other parts in the portfolio focus on signal conditioning or audio applications, the AD8509 is optimized for visual output stages. It offers pin compatibility with certain legacy components like the LMC6009, facilitating upgrades in existing designs. Its integration of multiple buffers into a single 48-pin package reduces board space compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.