D/A Converter Series for Electronic Adjustments High-precision 10bit 8ch 10ch Type D/A Converters BU2506FV, BU2505FV Rev.

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1 Converter Series for Electronic Adjustments High-precision bit 8ch ch Type Converters BU2FV, BU2FV No.92EAT Description BU2FV and BU2FV ICs are high performance bit R-2R type DACs with 8ch and ch outputs, respectively. Cascade connection is possible, ensuring suitability with multi-channel applications. Each channel incorporates a full swing output-type buffer amplifier with high speed output response characteristics, resulting in a greatly shortened wait time. The ICs also utilize the TT level input method, and with the RESET pin the output voltage can be kept in the lower reference voltage range. Features ) High performance, multi-channel R-2R-type bit converter built-in (BU2FV: 8 channels, BU2FV: channels) 2) Full swing output type buffer amplifier incorporated at each output channel ) The RESET terminal can keep the output voltage at all channels within the lower reference voltage range ) Digital input compatible with TT levels ) bit -line serial data + RESET signal input (address bit + data bit) ) Cascade connection available 7) SB first / MSB first of bit data can be changed by the REVERSE terminal 8) Compact package:.mm pitch, 2 pins (SSOP-B2) Applications DVDs, CD-Rs, CD-RWs, Digital cameras ineup Parameter BU2FV BU2FV Power source voltage range. to.v. to.v Number of channels ch 8ch Differential non linearity error ±.SB ±.SB Integral non linearity error ±.SB ±.SB Data transfer frequency MHz MHz Package SSOP-B2 SSOP-B2 Absolute Maximum Ratings(Ta=2 ) Parameter Symbol imits Unit Power source voltage VCC -. to. V converter upper standard voltage VDD -. to. V Input voltage VIN -. to. V Output voltage VOUT -. to. V Storage temperature range Tstg - to 2 Power dissipation Pd * mw * Derated at mw/ at Ta>2, mounted on a 7x7x.mm FR glass epoxy board (copper foil area less than %) Note: These products are not robust against radiation Recommended Operating Conditions(Ta=2 ) Parameter Symbol imits Unit Power supply voltage range VCC. to. V Operating temperature range Topr - to 8 29 RzOHM Co., td. All rights reserved. / Rev.A

2 BU2FV,BU2FV Electrical Characteristics(Unless otherwise specified, VCC=V, VrefH=V, Vref=V, Ta=2 ) Parameter Symbol imits MIN. TYP. MAX. Unit Conditions <Digital unit> Power source current ICC ma At CK=MHz, IAO=μA Input leak current IIK - - μa VIN= to VCC Input voltage VI V - Input voltage H VIH V - Output voltage VO -. V IO=2.mA Output voltage H VOH. - V IOH=-2.mA <Analog unit> Consumption current IrefH ma ma (*) Data condition : at maximum current converter upper standard voltage Outputs are not necessarily within VrefH. - V setting range the standard voltage setting range, converter lower standard voltage but ARE within the buffer amplifier Vref -. V setting range output voltage range (VO). Buffer amplifier output voltage range VO. -.9 IO=±μA V IO=±.mA Buffer amplifier output drive range IO -2-2 ma Upper saturation voltage =.V ower saturation voltage =.2V Precision Differential non-linearity error DN SB VrefH =.79V Integral non-linearity error IN Vref=.7V Zero point error SZERO -2-2 VCC=.V (mv/sb) mv Full scale error SFU -2-2 At no load (IO=+mA ) Buffer amplifier output impedance RO - Ω - Pull-up I/O internal resistance value Rup kω Input voltage V (Resistance value changes according to voltage supplied) * Value in the case where CH ~ CH8 are set to maximum current Timing Characteristics(Unless otherwise specified, VCC=V, VrefH=V, Vref=V, Ta=2 ) Parameter Symbol imits Conditions Unit MIN. TYP. MAX. Judgment level is 8% / 2% of VCC. Reset pulse width trt Clock pulse width tck Clock H pulse width tckh Clock rise time tcr Clock fall time tcf Data setup time tdch ns - Data hold time tchd oad setup time tch oad hold time tdc oad H pulse width tdh Data output delay time tdo C=pF DA output settling time tdd μs C pf, VO:.V.V. Until output becomes the final value /2SB RESET CK trt tck tcr tckh tcf tdc D tdch tchd tch tdh tdd DA OUTPUT tdo DO OUTPUT 29 RzOHM Co., td. All rights reserved. 2/ Rev.A

3 BU2FV,BU2FV Cascade Connection A cascade connection data output terminal (DO) is available for reducing the design load when the number of channels is increased. The DO terminal can be connected directly to the data input terminal () of the next stage. Its effectiveness increases as the number of channels increases.the data transition timing is as shown below. DO D CK BU2FV (* 2) CPU D CK DO D CK BU2FV (* ) CK D Data of # DO Data of #2 In a cascade connection, in order to have sufficient data change and clock edge time margins, make the clock line the shortest. Block Diagrams BU2FV BU2FV GND AO2 2 9 bit R-2R DA converter Ch2 bit atch bit atch Ch bit R-2R DA converter Buffer operation amplifier 2 VSS AO (Vref) GND AO2 2 9 bit R-2R DA converter Ch2 bit atch Ch bit atch bit R-2R DA converter Buffer operation amplifier 2 VSS AO (Vref) AO 8 AO AO 8 AO 7 bit Shift register D 2 7 D9 8 D 2 D Address decoder 7 8 AO 7 CK D DO AO AO Reverse Reset AO AO7 AO8 D 2 bit Shift register D9 D 2 D Address decoder 7 8 AO CK D DO TEST2 TEST Reverse Reset AO AO7 AO8 VCC VDD (VrefH) VCC VDD (VrefH) 29 RzOHM Co., td. All rights reserved. / Rev.A

4 BU2FV,BU2FV Terminal Descriptions No. Terminal Name Analog / Digital I/O Description Equivalent Circuit VSS Analog - DA converter lower standard voltage (Vref) input terminal 2 AO Analog O bit output(ch) AO Analog O bit output(ch) AO Analog O bit output(ch) Reverse Digital I The reverse SB and MSB of data designation bit in bit. 2 Reset Digital I All ch analog output fixed 2 7 AO Analog O bit output(ch) 8 AO7 Analog O bit output(ch7) 9 AO8 Analog O bit output(ch8) VDD Analog - DA converter upper standard voltage (VrefH) input terminal VCC - - Power source terminal - 2 AO9(TEST) Analog O bit output(ch9) (BU2FV : test terminal) AO(TEST2) Analog O bit output(ch) (BU2FV : test terminal) DO Digital O This outputs bit data of SB of bit shift register. D Digital I CK Digital I 7 Digital I D terminal. When High level is input, the value of bit shift register is loaded to decoder and output register. Shift clock input terminal. At rise of shift clock, the signal from terminal is input to bit shift register. Serial data input terminal. Serial data whose data length is bit (address bit + data bit) is input. 8 AO Analog O bit output(ch) 9 AO2 Analog O bit output(ch2) 2 GND - - GND terminal - *In the case of BU2FV, be sure to leave the TEST and TEST2 terminals open 29 RzOHM Co., td. All rights reserved. / Rev.A

5 BU2FV,BU2FV Command Transmission ) Reverse = open (or VCC short-circuit) setting (Data: SB first) () Data format (2) Data timing diagram CK D ast MSB D DA OUTPUT D2 First SB D D D9 D8 D7 D D D D D2 D D For converter コンハ ータ出力設定用 output setting SB MSB D D D2 D D D2 D For address アト レス選択用 selection D D2 D D Address Selection Inconsequential AO selection AO2 selection AO selection AO selection AO selection AO selection AO7 selection AO8 selection AO9 selection * AO selection * Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential D D2 D D D9 D8 D7 D D D output (VrefH=VDD, Vref=VSS) Vref (VrefH-Vref)/2 +Vref (VrefH-Vref)/2 2+Vref (VrefH-Vref)/2 +Vref : : : : : : : : : : : (VrefH-Vref)/2 22+Vref (VrefH-Vref)/2 2+Vref 2) Reverse = setting(data: MSB first ) () Data format (2) Data timing diagram CK D ast MSB D DA OUTPUT D First SB D D7 D8 D9 D D D2 D D D2 D D For converter コンハ ータ出力設定用 output setting SB MSB D D D2 D D D2 D For アト レス選択用 address selection D D2 D D Address selection Inconsequential AO selection AO2 selection AO selection AO selection AO selection AO selection AO7 selection AO8 selection AO9 selection * AO selection * Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential D D2 D D D9 D8 D7 D D D output (VrefH=VDD, Vref=VSS) Vref (VrefH-Vref)/2 +Vref (VrefH-Vref)/2 2+Vref (VrefH-Vref)/2 +Vref : : : : : : : : : : : (VrefH-Vref)/2 22+Vref (VrefH-Vref)/2 2+Vref * In the BU2FV, this channel is for testing, therefore, do not designate. 29 RzOHM Co., td. All rights reserved. / Rev.A

6 BU2FV,BU2FV Electrical Characteristics Curves VOUT [V] 2 VOUT [V] 2 VOUT [V] Fig. Output voltage linearity(- ) Fig.2 Output voltage linearity(2 ) Fig. Output voltage linearity(8 ).. DN [SB]. -. Rup [kω] 2 2 DN [SB] Vin [V] Fig. Differential linearity error (- ). Fig. Differential linearity error(2 ). Fig. Differential linearity error(8 ). IN [SB]. -. IN [SB]. -. IN [SB] Fig.7 Integral linearity error(- ) Fig.8 Integral linearity error(2 ) Fig.9 Integral linearity error(8 ) 2.2 ICC [ma] 2 code=h code=ffh code=ffh - Temp. [ ] Fig. Circuit current temperature characteristic VOUT [V] Ta=2 Ta=- Ta= IOUT [ma] Fig. Output load fluctuation characteristic (input code : FFh) Rup [kω] 2 2 Ta=2 Ta= Vin [V] Ta=8 Fig.2 Pull-up built in resistance characteristic 29 RzOHM Co., td. All rights reserved. / Rev.A

7 BU2FV,BU2FV Equivalent Circuits * to inside 2 to inside from inside * 2kΩ at Vcc =.V (changes according to voltage supplied) Standard Example Application Circuit V refh VCC AO CH V ref AO2 CH2 AO CH Reverse Reset Controller D CK GND AO CH Operation Notes Ensure that a constant voltage is supplied to each of the ground and power supply terminals. Insert a bypass capacitor between each power supply terminal and ground in order to prevent deterioration of the conversion accuracy due to ripple and noise signals. A capacitor should be inserted between the output and ground in order to eliminate jitter and noise. A capacitance up to pf is recommended (including the capacitance of the wire). This IC can select to decode the bit data pattern using either SB first or MSB first, depending on the conditions of the REVERSE terminal. Therefore, be sure to stabilize the REVERSE terminal by leaving it open or short-circuiting VDD (SB first), or short-circuiting GND (MSB first). Inserting a capacitor between the RESET terminal and GND and utilizing a time constant enables power ON reset functionality. Furthermore, when inputting the reset signal from the controller, it is possible to fix the output of all channels to ow at the low area of pulse. 29 RzOHM Co., td. All rights reserved. 7/ Rev.A

8 BU2FV,BU2FV Ordering part number B U 2 F V - E 2 Part No. Part No. 2 2 Package FV: SSOP-B2 Packaging and forming specification E2: Embossed tape and reel SSOP-B2 2. ±.2 <Tape and Reel information> Tape Embossed carrier tape Quantity 2pcs. ±.. ±.2.Min. Direction of feed E2 The direction is the pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand ( ). ±.. ±..±...22 ±.. (Unit : mm) Reel pin Direction of feed Order quantity needs to be multiple of the minimum quantity. 29 RzOHM Co., td. All rights reserved. 8/ Rev.A

9 Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,td. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade aw, you will be required to obtain a license or permit under the aw. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System 29 ROHM Co., td. All rights reserved. R9A