AD16312

The AD16312 is a VFD controller/driver that is driven on a 1/5 to 1/12 duty factor. It consists of 5 segment output lines 6 segment scan output lines, 6grid output lines, 5segment output drive lines, a display memory, a control circuit, and a key scan circuit. Serial data id input to the AD16312 through a four-line serial interface. The feature of AD16312 are as follows: (1)4-pin serial interface; (2)key scanning(6*4 matrices); (3)programming display modes(11-digit & 11-segment to 16-digit & 4-segment); (4)programming dimming step; (5)high-voltage output(VDD-35V max); (6)LED ports(4 channels, 20mA max); (7)4-pin general-purpose input port; (8)built in oscillator; (9)no external resistor necessary for driver outputs.

The absolute maximum ratings of the AD16312 are: (1)logic supply voltage: -0.5 to +7.0V; (2)driver supply voltage: VDD +0.5 to VDD -40V; (3)logic input voltage: -0.5 to VDD +0.5V; (4)VFD driver output voltage: VEE -0.5 to VDD +0.5V; (5)LED driver output current: +25mA; (6)VFD driver output current: -40(grid) mA and  -15(segment)mA; (7)operating ambient temperature: 0 to 85; (8)storage temperature: -20 to +125.

The following is about the electrical characteristics of AD16312: (1)high-level output voltage: 0.9VDD V min at LED1-LED4, IOH1=-1mA; (2)low-level output voltage: 1V max at LED1-LED4, IOH1=20mA; (3)low-level output voltage: 0.4V max at DOUT,IOL2=4mA; (4)high-level output current: -3mA min at VO=VDD-2V,seg1 to seg11; (5)high-level output current: 15mA min at VO=VDD-2V,grid1 to grid6, seg12/grid11 to seg16/grid7; (6)driver leakage current: -10A max at VO=VDD-35V, driver off; (7)output pull-down resistor: 50k min, 150k max and 100k typical at driver output; (8)high-level input voltage: 0.7VDD V min; (9)low-level input voltage: 0.3VDD V max.