BU2508FV

D/A Converter Series for Electronic Adjustments High-precision 10bit 4ch・6ch Type D/A Converters BU2508FV, BU2507FV No.09052EAT02 ●Description BU2508FV and BU2507FV ICs are high performance 10bit R-2R-type DACs with 4ch and 6ch outputs, respectively. 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 TTL level input method. ●Features 1) High performance, multi-channels R-2R-type 10bit D/A converter built-in (BU2508FV: 4 channels, BU2507FV: 6 channels) 2) Full swing output type buffer amplifier incorporated at each output channel 3) The RESET terminal can keep the voltage of all channels within the lower reference voltage range 4) Digital input compatible with TTL levels 5) 14bit 3-line serial data + RESET signal input (address 4bit + data 10bit) 6) Compact package: 14 pins, 0.65mm pitch (SSOP-B14) ●Applications DVDs, CD-Rs, CD-RWs, digital cameras ●Lineup Parameter Power source voltage range Number of channels Differential non linearity error Integral non linearity error Data transfer frequency Package ●Absolute Maximum Ratings（Ta=25℃） Parameter Power source voltage D/A converter upper standard voltage Input voltage Output voltage Storage temperature range Power dissipation * BU2507FV 4.5 to 5.5V 6ch ±1.0LSB ±3.5LSB 10MHz SSOP-B14 BU2508FV 4.5 to 5.5V 4ch ±1.0LSB ±3.5LSB 10MHz SSOP-B14 Symbol VCC VDD VIN VOUT Tstg Pd Limits -0.3 to 6.0 -0.3 to 6.0 -0.3 to 6.0 -0.3 to 6.0 -55 to 125 350 ＊ Unit V V V V ℃ mW Derated at 3.5mW/℃ at Ta>25℃, mounted on a 70x70x1.6mm FR4 glass epoxy board (copper foil area less than 3%) Note: These products are not robust against radiation ●Recommended Operating Conditions (Ta=25℃） Parameter Power supply voltage range Operating temperature range Symbol VCC Topr Limits 4.5 to 5.5 -30 to 85 Unit V ℃ www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 1/8 2009.06 - Rev.A BU2508FV,BU2507FV Technical Note ●Electrical Characteristics（Unless otherwise specified, VCC＝5V, VrefH＝5V, VrefL＝0V, Ta＝25℃） Limits Parameter Symbol Unit Conditions MIN. TYP. MAX. Power source current ICC 0.85 2.8 mA At CLK = 10MHz, IAO = 0uA Input leak current IILK -5 5 μA VIN=0 to VCC Input voltage L VIL 0.8 V Input voltage H VIH 2.0 V Output voltage L VOL 0 0.4 V IOL=2.5mA Output voltage H VOH 4.6 5 V IOH=-2.5mA 4.5 7.5 mA Consumption current IrefH Data condition : at maximum current 2.0 3.4 mA(*1) D/A converter upper standard voltage setting range D/A converter lower standard voltage setting range Buffer amplifier output voltage range Buffer amplifier output drive range VrefH VrefL VO IO 3.0 0 0.1 0.2 -2 5 25 5 1.5 4.9 4.75 2 1.0 3.5 25 25 15 37.5 V V V mA LSB mV Ω kΩ Outputs does not necessarily take a value in standard voltage setting range. Value that output may take is in the buffer amplifier output voltage range (VO). IO=±100μA IO=±1.0mA Upper saturation voltage =0.35V Lower saturation voltage =0.23V VrefH =4.796V VrefL=0.7V VCC=5.5V (4mV/LSB) No load (IO = +0mA) Input voltage 0V (Resistance value changes according to voltage to be impressed.) Differential non-linearity error DNL -1.0 Integral non-linearity error INL -3.5 Precision Zero point error SZERO -25 Full scale error SFULL -25 Buffer amplifier output impedance RO Pull-up I/O internal resistance value Rup 12.5 *1: Value in the case where CH1 ~ CH4 are set to maximum current ●Timing Characteristics (Unless otherwise specified, VCC＝5V, VrefH＝5V, VrefL＝0V, Ta＝25℃） Limits Conditions Parameter Symbol Unit Judgment level is 80% / 20% of VCC. MIN. TYP. MAX. Reset L pulse width Clock L pulse width Clock H pulse width Clock rise time Clock fall time Data setup time Data hold time Load setup time Load hold time Load H pulse width DA output settling time tRTL tCKL tCKH tcr tcf tDCH tCHD tCHL tLDC tLDH tLDD 50 50 50 20 40 50 50 50 7 50 50 20 CL≦1000pF, VO:0.5V⇔4.5V . Until output becomes the final value 1/2LSB nS μS RESET tRTL CLK tCKL DI tLDH LD tDCH tCHD tCHL tLDD Output tLDC tcr tCKH tcf www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 2/8 2009.06 - Rev.A BU2508FV,BU2507FV Technical Note ●DAC Variable Output Range Function With the variable output range function, the upper / lower limits of the output voltage as well as the power supply voltage can be set. The upper limit value setting terminal VrefH is used as the power supply terminal, while the lower limit value setting terminal VrefL is used as the GND terminal (1LSB ≒ 5mV). In the example below, VrefH = 3.5V / VrefL = 1.5V. Further adjustments can be made in order to achieve greater accuracy (1LSB ≒ 2mV). VOUT VOUT 5V 5V 3.5V 1024 step ステップ 1.5V 1024 step ステップ VrefL VrefH 0V 0V 3FFh Input Code 3FFh Input Code 1LSB≒5.0mV 1LSB≒2.0mV ●Block Diagrams BU2507FV BU2508FV VDD (VrefH) AO6 AO5 AO4 4 6 5 3 ｱﾄﾞﾚｽ Address ﾃﾞｺｰﾀﾞ decoder Aｱﾄﾞﾚｽ ddress ﾃﾞｺｰﾀﾞ decoder 14bit Sシフトレジスタ hift register 14bit Shift register シフトレジスタ D10 D9 Reset D9 D10 4 3 2 1 1 2 3 4 10bit Latch 10bit Latch 10bit Latch 10bit R-2R DD/Aｺﾝﾊﾞｰﾀ r A converte 10bit Latch 10bit R-2R D/Aｺﾝﾊﾞｰﾀ DA converter 10bit R-2R D/Aｺﾝﾊﾞｰﾀ DA converter AO1 10bit R-2R D/Aｺﾝﾊﾞｰﾀ DA converter AO1 AO2 CH1 CH1 CH2 CH2 Buffer operation ﾊﾞｯﾌｧ amplifier ｵﾍﾟｱﾝﾌﾟ Buffer ﾊﾞｯﾌｧ operation ｵﾍﾟｱﾝﾌﾟ amplifier VSS (VrefL) www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 3/8 2009.06 - Rev.A VSS (VrefL) GND GND 14 14 1 1 AO2 13 13 2 2 TEST1 D0 AO3 D/A 12 DI 12 DI D0 3 3 L 3 Reset CLK CLK 11 11 8 8 4 6 5 5 6 4 7 7 TEST2 D13 AO4 D13 LD D/A LD 10 10 ・・・ ・・・ 12 12 5 L 11 4 11 5 AO3 D/A D/A D/A D/A 9 9 6 L L 6 L L VDD (VrefH) VCC VCC 8 7 8 7 BU2508FV,BU2507FV ●Terminal Description No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Terminal name VSS AO2 AO3(TEST1) Reset AO4(TEST2) AO5 (AO3) VDD VCC AO6 (AO4) LD CLK DI AO1 GND Analog / Digital Analog Analog Analog Digital Digital Analog Analog Analog Digital Digital Digital Analog I/O O O I I O O I I I O Description of terminal DA converter lower standard voltage (VrefL) input terminal 10bit D/A output (CH2) 10bit D/A output (CH3) (BU2508FV : test terminal) All ch analog output L fixed 10bit D/A output (CH4) (BU2508FV : test terminal) Technical Note Equivalent circuit 6 4 4 2 4 4 5 4 1 1 1 4 - 10bit D/A output (CH5) (BU2508FV : 10bit D/A output (CH3)) DA converter upper standard voltage (VrefH) input terminal Power source terminal 10bit D/A output (CH6) (BU2508FV : 10bit D/A output (CH4)) When High level is input to LD terminal, the value of 14bit shift register is loaded to decoder and D/A output register. Shift clock input terminal. At rise of shift clock, the signal from DI terminal is input to 14bit shift register. Serial data input terminal. Serial data whose data length is 14bit (address 4bit + data 10bit) is input. 10bit D/A output (CH1) GND terminal *In the case of BU2508FV, be sure to open TEST1 and TEST2 terminals. www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 4/8 2009.06 - Rev.A BU2508FV,BU2507FV ●Command Sending 1) In the case of BU2507FV (1) Data format [data : LSB first] Last MSB Ｄ13 Ｄ12 Ｄ11 Ｄ10 Ｄ9 Ｄ8 Ｄ7 Ｄ6 Ｄ5 Ｄ4 Ｄ3 Ｄ2 Ｄ1 First LSB Ｄ0 Technical Note For D/A converter output setting Ｄ／Ａｺﾝﾊﾞｰﾀ出力設定用 For address selection ｱﾄﾞﾚｽ選択用 (2) Data timing diagram DI CLK LD output DA出力 LSB Ｄ0 Ｄ1 Ｄ2 Ｄ3 Ｄ11 Ｄ12 MSB Ｄ13 Ｄ3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Ｄ2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Ｄ1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Ｄ0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Address selection Inconsequential Inconsequential AO1 selection AO2 selection Inconsequential AO3 selection AO4 selection Inconsequential AO5 selection AO6 selection Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential D13 0 0 0 0 ： 1 1 D12 0 0 0 0 ： 1 1 D11 0 0 0 0 ： 1 1 D10 0 0 0 0 ： 1 1 D9 0 0 0 0 ： 1 1 D8 0 0 0 0 ： 1 1 D7 0 0 0 0 ： 1 1 D6 0 0 0 0 ： 1 1 D5 0 0 1 1 ： 1 1 D4 0 1 0 1 ： 0 1 D/A output (VrefH=VDD, VrefL=VSS) VrefL (VrefH-VrefL)/1024×1+VrefL (VrefH-VrefL)/1024×2+VrefL (VrefH-VrefL)/1024×3+VrefL : (VrefH-VrefL)/1024×1022+VrefL (VrefH-VrefL)/1024×1023+VrefL 2) In the case of BU2508FV (1) Data format [Data: LSB first ] Last MSB Ｄ13 Ｄ12 Ｄ11 Ｄ10 Ｄ9 Ｄ8 Ｄ7 Ｄ6 Ｄ5 Ｄ4 Ｄ3 Ｄ2 Ｄ1 First LSB Ｄ0 For D/A converter output setting Ｄ／Ａｺﾝﾊﾞｰﾀ出力設定用 For address selection ｱﾄﾞﾚｽ選択用 (2) Data timing diagram LSB Ｄ0 MSB Ｄ13 DI CLK LD DAoutput 出力 Ｄ1 Ｄ2 Ｄ3 Ｄ11 Ｄ12 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Address selection Don’t Care Don’t Care AO1 selection AO2 selection Don’t Care Don’t Care Don’t Care Don’t Care AO3 selection AO4 selection Don’t Care Don’t Care Don’t Care Don’t Care Don’t Care Don’t Care D13 0 1 0 1 : 0 1 D12 0 0 1 1 : 1 1 D11 0 0 0 0 : 1 1 D10 0 0 0 0 : 1 1 D9 0 0 0 0 : 1 1 D8 0 0 0 0 : 1 1 D7 0 0 0 0 : 1 1 D6 0 0 0 0 : 1 1 D5 0 0 0 0 : 1 1 D4 0 0 0 0 : 1 1 D/A output（VrefH=VDD, VrefL=VSS） VrefL (VrefH-VrefL)/1024×1+VrefL (VrefH-VrefL)/1024×2+VrefL (VrefH-VrefL)/1024×3+VrefL : (VrefH-VrefL)/1024×1022+VrefL (VrefH-VrefL)/1024×1023+VrefL www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 5/8 2009.06 - Rev.A BU2508FV,BU2507FV ●Electrical Characteristics Curves 6 Technical Note 6 6 5 5 5 4 4 4 VOUT [V] 3 VOUT [V] VOUT [V] 3 3 2 2 2 1 1 1 0 0 200 400 600 800 1000 1200 0 0 200 400 600 800 1000 1200 0 0 200 400 600 800 1000 1200 Input Code [decimal] Input Code [decimal] Input Code [decimal] Fig.1 Output voltage linearity （-30℃） 1.5 Fig.2 Output voltage linearity （25℃） 1.5 Fig.3 Output voltage linearity （85℃） 1.5 1 1 1 DNL [LSB] DNL [LSB] DNL [LSB] 0.5 0.5 0.5 0 0 0 -0.5 -0.5 -0.5 -1 -1 -1 -1.5 0 200 400 600 800 1000 1200 -1.5 0 200 400 600 800 1000 1200 -1.5 0 200 400 600 800 1000 1200 Input Code [decimal] Input Code [decimal] Input Code [decimal] Fig.4 Differential linearity error （-30℃） 1.5 Fig.5 Differential linearity error （25℃） 1.5 Fig.6 Differential linearity error （85℃） 1.5 1 1 1 0.5 0.5 0.5 INL [LSB] INL [LSB] 0 0 INL [LSB] 0 200 400 600 800 1000 1200 0 -0.5 -0.5 -0.5 -1 -1 -1 -1.5 0 200 400 600 800 1000 1200 -1.5 -1.5 0 200 400 600 800 1000 1200 Input Code [decimal] Input Code [decimal] Input Code [decimal] Fig.7 Integral linearity error （-30℃） 6 Fig.8 Integral linearity error （25℃） 2.52 Fig.9 Integral linearity error （85℃） 1.5 5 2.51 1 Ta=85℃ ICC [mA] code=1FFh 3 VOUT [V] DNL [LSB] 4 Ta=-30℃ Ta=25℃ 0.5 2.5 0 Ta=25℃ Ta=85℃ 2 -0.5 Ta=-30℃ code=000h 1 2.49 -1 code=3FFh 0 -40 10 Temp. [℃] 60 2 .48 -2.5 -1.5 -0.5 0.5 1.5 2.5 - 1.5 0 200 400 600 800 1000 1200 IOUT [mA] Input Code [decimal] Fig.10 Circuit current temperature characteristic Fig.11 Output load fluctuation characteristic (input code : 1FFh) Fig.12 Pull-up built in resistance characteristic www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 6/8 2009.06 - Rev.A BU2508FV,BU2507FV ●Equivalent Circuits Technical Note *1 1 to inside 2 to inside 4 ・ 3 from inside 5 4 5 ・ 6 6 *1: 25kΩ at Vcc = 5.0V (changes according to voltage supplied) ●Standard Example Application Circuit V refH VCC AO1 CH1 V refL AO2 CH2 AO3 CH3 R eset C ontroller LD C LK DI AO6 GND CH6 ●Operation Notes Ensure that a constant voltage is supplied to each of the 1 ground and 3 power supply terminals. Insert a bypass capacitor between each power supply terminal and ground in order to prevent deterioration of the D/A 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 100pF is recommended (including the capacitance of the wire). 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 Low at the low area of pulse. www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 7/8 2009.06 - Rev.A BU2508FV,BU2507FV ●Ordering part number Technical Note B U 2 Part No. 2507 2508 5 0 8 F V - E 2 Part No. Package FV: SSOP-B14 Packaging and forming specification E2: Embossed tape and reel SSOP-B14 5.0 ± 0.2 14 8 Tape Quantity 0.3Min. Embossed carrier tape 2500pcs E2 The direction is the 1pin of product is at the upper left when you hold 6.4 ± 0.3 4.4 ± 0.2 Direction of feed ( reel on the left hand and you pull out the tape on the right hand ) 1 7 0.15 ± 0.1 1.15 ± 0.1 0.10 0.65 0.1 0.22 ± 0.1 1pin (Unit : mm) Direction of feed Reel ∗ Order quantity needs to be multiple of the minimum quantity. www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 8/8 2009.06 - Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. 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. 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