General Description
The AS1109 is designed to drive up to 8 LEDs through a fast serial interface and features 8 output constant current drivers and an onchip diagnostic read-back function.
The high clock-frequency (up to 50MHz), adjustable output current, and flexible serial interface makes the device perfectly suited for high-volume transmission applications.

Key Features
■8 Constant-Current Output Channels
■Excellent Output Current Accuracy
    - Between Channels: ±2%
    - Between AS1109 Devices: ±2%
■Output Current Per Channel: 0.5 to 100mA
■Controlled In-Rush Current
■Over-Temperature, Open-LED, Shorted-LED Diagnostics Functions
■Low-Current Test Mode
■Global Fault Monitoring
■Low Shutdown Mode Current: 3µA
■Fast Serial Interface: up to 50MHz
■Cascaded Configuration
■Fast Output Drivers Suitable for PWM
■16-pin SOIC-150, 16-pin QFN (4x4mm) and 16-pin QSOP-150 Package

Applications
    The device is ideal for fixed- or slow-rolling displays using static or multiplexed LED matrix and dimming functions, large LED matrix displays, mixed LED display and switch monitoring, displays in elevators, public transports (underground, trains, buses, taxis, airplanes, etc.), large displays in stadiums and public areas, price indicators in retail stores, promotional panels, bar-graph displays, industrial controller displays, white good panels, emergency light indicators, and traffic signs.