BU2500FV / BU2501FV Optical disc ICs 8bit 12-channel D/A converter BU2500FV / BU2501FV BU2500FV / BU2501FV is a 12ch high-performance 8bit D/A converter which adopts the R-2R system. The BU2500FV utilizes a 5V supply voltage and the BU2501FV a 3V. Each channel output incorporates a Rail to Rail output type buffer amplifier. Three wire serial data input and cascade connection is possible. Small package (0.65mm pitch and 20pin) is adopted. z Applications CD-R, CD-RW, DVC, Digital camera and industrial equipment z Features 1) High-performance 8bit 12-channel D/A converter adopting the R-2R system. 2) Output of each channel incorporates a Rail to Rail output type buffer amplifier. 3) Digital input compatible with TTL levels. 4) 12bit 3wire serial data input, cascade connection is possible. 5) Buffer amplifier of each channel is highly-stable. Prevents oscillation even with capacitance loads. z Absolute maximum ratings (Ta=25C) Parameter Symbol Limits Unit Supply voltage VCC V 0.3~+6.0 Upper reference voltage VDD 0.3~+6.0 V of D/A converter Input voltage VIN 0.3~+6.0 V Output voltage VOUT 0.3~+6.0 V Power dissipation Pd 400 mW Operating temperature Topr 25~+85 C Storage temperature Tstg 55~+125 C Reduced by 4mW for each increase in Ta of 1C over 25C. z Recommended operating conditions (Ta=25C) Parameter Symbol Limits Unit Supply voltage (BU2500FV) VCC 4.5~5.5 V Supply voltage (BU2501FV) VCC 2.7~3.6 V 1/3 BU2500FV / BU2501FV Optical disc ICs z Block diagram GND AO2 AO1 DI CLK LD Do AO12 AO11 Vcc 20 19 18 17 16 15 14 13 12 11 12bit SHIFT REGISTER 8bit R-2R D0 1 2 3 4 5 6 7 D8 9 10 11 D / A D / A D / A D/A CONVERTER ch2 1 12 11 ADDRESS 8bit Latch L L L DECODER 8bit Latch L L L L L L L ch3 4 5 6 7 8 9 10 8bit R-2R D / A D / A D / A D / A D / A D / A D / A D/A CONVERTER BUFFER OPERATIONAL AMPLIFIER 12 3 4 5 6 7 8 9 10 Vss AO3 AO4 AO5 AO6 AO7 AO8 AO9 AO10 VDD (VrefL) (VrefH) 2/3