austriamicrosystems 公司的AS1116是帶誤差檢測的 64 路LED驅動器，能驅動64個LED或8位7段LED，器件還可通過10MHz SPI兼容的3線接口進行編程。AS1116具有LED開路或短路檢測，全部或單個誤差檢測，可進行單位亮度控制。工作電壓為2.7V到5.5V，關斷電流僅為200nA. AS1116可用作公共信息顯示屏的點陣顯示或7段顯示如地鐵，火車或公交站，機場以及手機，個人電子設備和玩具等。本文介紹了AS1116的主要特性以及典型應用方框圖和LED點陣顯示驅動案例。

　　austriamicrosystems AS1116 64 LED Driver with Detailed Error Detection

　　The AS1116 is a compact LED driver for 64 single LEDs or 8 digits of 7-segments. The devices can be programmed via an SPI compatible 3-wire interface.

　　Every segment can be individually addressed and updated separatELy. Only one external resistor (RSET) is required to set the current. LED brightness can be controlled by analog or digital means.

　　The devices include an integrated BCD code-B/HEX decoder, multiplex scan circuitry, segment and display drivers, and a 64-bit memory. Internal memory stores the shift register settings, eliminating the need for continuous device reprogramming.

　　Additionally the AS1116 offers a diagnostic mode for easy and fast production testing and allows the use of the AS1116 for critical applications. The diagnostic allows to detect individual open or shorted LEDs.

　　The AS1116 features a low shutdown current of typically 200nA, and an operational current of typically 350μA. The number of digits can be programmed, the devices can be reset by software, and an external clock is also supported.

　　The device is available in a QSOP-24 and TQFN(4x4)-24 package.

　　AS1116主要特性：

　　10MHz SPI-Compatible Interface

　　Open and Shorted LED Error Detection

　　Global or Individual Error Detection

　　Hexadecimal- or BCD-Code for 7-Segment Displays

　　200nA Low-Power Shutdown Current (typ; data retained)

　　Individual Digit Brightness Control

　　Digital and Analog Brightness Control

　　Display Blanked on Power-Up

　　Drive Common-Cathode LED Displays

　　Supply Voltage Range: 2.7 to 5.5V

　　Software Reset

　　Optional External Clock

　　Package:

　　QSOP-24 and TQFN(4x4)-24

　　AS1116應用：

　　The AS1116 is ideal for seven-segment or dot matrix displays in public information displays at subway, train or bus stations, at airports and also at displays in public

　　transportation like buses or trains mobile phones, personal electronic and toys.

圖1。AS1116典型應用方框圖

圖2。AS1116 LED點陣驅動案例