Analog ICs manufacturer Austriamicrosystems has introduced the AS1115, its new user interface (UI) LED driver. It combines display driving and key scanning, providing a front panel system which is expected to eliminate the use of secondary µP or other logics plus discrete devices, reducing BOM count.
The AS1115 features the built-in LED error detection which allows the error diagnostics to be accessed during normal operation. This feature is expected to detect any open- or short-circuit within the multiplexed 8×8 LED array and a detailed error report could be read out with the exact position of the broken LED.
Austriamicrosystems claims that the new LED driver can drive either eight 7-segment digits or 64 individual LEDs with 47mA per digit or 5mA per LED. Additionally it offers the read back of up to 16-keys completing the single chip UI driver.
According to the company, the new LED driver operates from a single 2.7V to 5.5V supply while requiring the current supply of 0.6mA during operation and 200nA in shutdown mode. It interfaces through I²C and up to four devices can be addressed on a single I²C bus. It is suitable for operating environments ranging from -40 to +85°C.
