Datasheet D/A Converter Series for Electronic Adjustment 10bit 8ch/10ch D/A Converters BU2505FV BU2506FV General Description Key Specifications The BU2505FV and BU2506FV ICs are 10bit R-2R type Operating Supply Voltage Range 4.5V to 5.5V D/A converters with 10ch and 8ch outputs, respectively. Number of Channels Cascade connection is available, ensuring suitability for BU2505FV 10ch multi-channel applications. Each channel incorporates a BU2506FV 8ch full swing output type buffer amplifier with high speed Differential Non Linearity Error 1.0LSB(Max) output response characteristics, resulting in a greatly Integral Non Linearity Error 3.5LSB(Max) shortened D/A output settling time. The ICs also have Data Transfer Frequency 10MHz(Max) digital input pins compatible with TTL levels, and the maximum value of the data transfer frequency is 10MHz. With the variable output range function, the upper and Packages W(Typ) x D(Typ) x H(Max) lower limits of the output voltage can be set separately SSOP-B20 6.50mm x 6.40mm x 1.45mm from the power supply voltage. Features Built-in Multi-channel R-2R Type 10bit D/A Converter (BU2506FV: 8 Channels, BU2505FV: 10 Channels) Built-in Full Swing Output Buffer Amplifier for All Channels RESET Terminal to fix the Output Voltage to the Lower Reference Level for All Channels Digital Inputs Compatible with TTL Levels 3-wire Serial Interface and RESET Signal to send a 14bit Format Word (4bit Address and 10bit Data) REVERSE Terminal to select LSB First or MSB First of 10bit Data SSOP-B20 Cascade Connection is Available Applications Control of the Various Types of Consumer and Industrial Equipment Typical Application Circuit VCC VCC VDD VrefH AOAO11 CH1CH1 (VrefH) AOAO22 CH2 CH2 VSS VrefL (VrefL) AOAO33 CH3CH3 Reverse REVERSE REResetSET LD LD AOAO1100 CHCH1100 ContrControollllerer CLK CLK DI DI GND GND Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays. w ww.rohm.com TSZ02201-0RLR0GZ10140-1-2 p 2015 ROHM Co., Ltd. All rights reserved. 1/18 TSZ2211114001 11.Dec.2015 Rev.001 BU2505FV BU2506FV Pin Configurations SSOP-B20 (TOP VIEW) 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 1 0 Pin Descriptions Description Terminal Analog / Equivalent No. I/O Name Digital circuit No. BU2505FV BU2506FV 1 VSS Analog - D/A converter lower reference voltage (V ) input terminal 6 refL 2 AO3 Analog O 10bit D/A output(CH3) 4 3 AO4 Analog O 10bit D/A output(CH4) 4 4 AO5 Analog O 10bit D/A output(CH5) 4 Reverses the 10bit designated as data in the 14bit to select MSB 5 REVERSE Digital I (Note 1) 2 first or LSB first. Fixes the output voltage to the lower reference level for all 6 RESET Digital I 2 channels. 10bit D/A output(CH6) 7 AO6 Analog O 4 8 AO7 Analog O 10bit D/A output(CH7) 4 9 AO8 Analog O 10bit D/A output(CH8) 4 D/A converter upper reference voltage (V ) input terminal 10 VDD Analog - refH 5 Power supply 11 VCC - - - (Note 2) 10bit D/A output(CH9) test terminal 12 AO9(TEST1) Analog O 4 (Note 2) 10bit D/A output(CH10) test terminal 13 AO10(TEST2) Analog O 4 14 DO Digital O Outputs the LSB data of 14bit shift resister. 3 When the LD terminal is set to the high level voltage, 14bit data in 15 LD Digital I the shift register is loaded on to the address decoder and a 1 specified D/A output register. Shift clock input terminal. At the rising edge of the CLK input, an 16 CLK Digital I 1 input value on the DI terminal is input to the 14bit shift register. Serial data input terminal. Serial data length is 14bit (4bit address 17 DI Digital I 1 and 10bit data). 18 AO1 Analog O 10bit D/A output(CH1) 4 10bit D/A output(CH2) 19 AO2 Analog O 4 GND terminal 20 GND - - - (Note 1) It is selectable for the IC to receive 10bit data in LSB first order or MSB first order, depending on the condition of the REVERSE terminal. If the REVERSE terminal is set to the GND voltage, it is MSB first (Note 2) The TEST1 and TEST2 terminals of the BU2506FV should be left open. These terminals are used for testing. www.rohm.co.jp TSZ02201-0RLR0GZ10140-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/18 TSZ2211115001 11.Dec.2015 Rev.001
