D/A Converter Series for Electronic Adjustments Standard 8bit 4ch・6ch Type D/A Converters BH2227FV, BH2228FV No.09052EAT04 ●Description The BH2227FV and BH2228FV ICs are 8bit R-2R-type D/A converters with 4 and 6 channels, respectively. Optimized circuitry allows two output voltages to be supplied (3V/5V). Furthermore, the built-in RESET function ensures that the output voltage at all channels is Low during power up. A broad power supply voltage range is available (2.7V-5.5V), providing design flexibility. ●Features 1) Suitable for 2 independent power sources (3V/5V) 2) Built-in RESET function 3) High speed output response characteristics 4) 3-line serial interface 5) Broad power supply voltage range: 2.7V-5.5V ●Applications DVCs, DSCs, DVDs, CD-Rs, CD-RWs ●Lineup Parameter Power source voltage range BH2227FV BH2228FV 2.7 to 5.5V 2.7 to 5.5V Number of channels 4ch 6ch Current consumption 0.9mA 0.9mA Differential non linearity error ±1.0LSB ±1.0LSB Integral non linearity error ±1.5LSB ±1.5LSB Output current performance ±1.0mA ±1.0mA Settling time 100µs 100µs Data transfer frequency 10MHz 10MHz Input method Data latch method CMOS CMOS CSB method CSB method SSOP-B14 SSOP-B14 Package ●Absolute Maximum Ratings(Ta=25℃) Parameter Symbol Limits Unit Remarks Power source voltage VCC -0.3 to 7.0 V - Terminal voltage VIN -0.3 to VCC V - TSTG -55 to 125 ℃ - PD 400*1 mW - Storage temperature range Power dissipation *1 Derated at 4.0mW/ ℃ at Ta>25℃ *2 This product is not robust against radiation. www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 1/8 2009.06 - Rev.A Technical Note BH2227FV, BH2228FV ●Recommended Operating Conditions(Ta=25℃) Parameter Symbol Limits Min. Typ. Max. Unit Remarks VDD power source voltage VDD 2.7 - 5.5 V - VFS voltage to be impressed VFS 2.7 - 5.5 V - Terminal input voltage range VIN 0 - VDD V - IO -1.0 - 1.0 mA - Action temperature range TOPR -20 - 85 ℃ - Serial clock frequency FCLK - 1.0 10.0 MHz - CL - - 0.1 µF - Analog output current Limit load capacity ●Electrical Characteristics(Unless otherwise specified, VDD=VFS=3.0V, RL=OPEN, CL=0pF, Ta=25℃) Parameter Symbol Limits Min. Typ. Max. Unit Conditions <Current consumption> VDD system IDD - 0.5 1.5 mA VDD=5V，CLK=1MHz VFS system IFS - 0.3 0.9 mA L input voltage VIL VSS - 0.6 V VDD=5.0V H input voltage VIH 2.4 - VDD V VDD=5.0V Input current IIN -10 - 10 µA VSS - 0.1 V <Logic interface> <Buffer amplifier> Output zero scale voltage ZS FS1 Output full scale voltage FS2 00h setting, at no load VSS - 0.3 V 00h setting, IOL=1.0mA VDD-0.1 - VDD V FFh setting, at no load VDD-0.3 - VDD V FFh setting,IOH=1.0mA VFS-0.1 - VFS V FFh setting, at no load VFS-0.3 - VFS V FFh setting,IOH=1.0mA <D/A converter precision> Differential non linearity error DNL -1.0 - 1.0 LSB Input code 02H to FDH Integral non linearity error INL -1.5 - 1.5 LSB Input code 02H to FDH VDD power source voltage rise time trVDD 100 - - µs Power ON reset release voltage VPOR - 1.9 - V www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 2/8 VDD=0→2.7 2009.06 - Rev.A Technical Note BH2227FV, BH2228FV ●Timing Chart(Unless otherwise specified, VDD = VFS = 3.0V, RL = OPEN, CL = 0pF, Ta = 25℃) Parameter Symbol Limits MIN. TYP. MAX. Unit CLK L level time tCLKL 50 - - ns CLK H level time tCLKH 50 - - ns DI setup time tsDI 20 - - ns DI hold time thDI 40 - - ns CSB setup time tsCSB 50 - - ns CSB hold time thCSB 50 - - ns CSB H level time tCSBH 50 - - ns tOUT - - 100 µs D/A Output settling time tCLKL Conditions CL=50pF,RL=10kΩ tCLKH 2.4V 0.6V CLK tsDI thDI 2.4V 0.6V DI tsCSB tCSBH thCSB 2.4V 0.6V CSB tOUT 90% 10% Analog output Fig.1 www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 3/8 2009.06 - Rev.A Technical Note BH2227FV, BH2228FV ●Terminal Description / Block Diagrams (BH2227FV) Terminal Terminal name 1 AO1 2 AO2 3 TESTMONI1 4 TESTMONI2 5 AO3 6 AO4 7 NC 8 NC 9 VDD 10 11 12 CSB CLK DI 13 VFS 14 VSS Function Analog output terminal Test terminal (OPEN at normal use) AO1 1 VDD R2R Analog output terminal AO2 2 VDD R2R Internally not connected yet TEST MONI1 3 Power source terminal (AO3, 4 full scale voltage use in common) TEST MONI2 4 AO3 5 VDD AO4 6 VDD NC 7 Chip select signal input terminal Serial clock input terminal Serial data input terminal AO1,2 full scale Voltage setting terminal Ground terminal VFS 14 VSS REG VFS 13 VFS REG 12 DI Serial Interface 11 CLK VDD REG R2R VDD REG R2R 10 CSB PowerOn Reset 9 VDD 8 NC Fig.2 (BH2228FV) Terminal Terminal name Function 1 AO1 2 AO2 3 AO3 Analog output terminal 4 AO4 5 AO5 6 AO6 7 NC Internally not connected yet 8 NC Power source terminal (AO4~6 full scale voltage use 9 VDD in common) Chip select signal input terminal 10 CSB Serial clock input terminal 11 CLK Serial data input terminal 12 DI AO1,2,3 full scale 13 VFS Voltage setting terminal Ground terminal 14 VSS AO1 1 VDD AO2 2 VDD AO3 3 AO4 4 AO5 5 AO6 6 NC 7 VDD VFS R2R REG 14 VSS VFS R2R REG 13 VFS VFS R2R REG VDD VDD R2R VDD R2R VDD VFS REG VDD VDD REG VDD R2R REG 12 Serial Interface 11 CLK VDD PowerOn Reset DI VDD 10 CSB 9 VDD 8 NC Fig.3 ●Equivalent Circuits Terminal Equivalent circuit VDD AO1 AO2 AO3 AO4 AO5 AO6 VSS Terminal VDD Equivalent circuit VDD VDD VSS VSS DI CLK CSB VSS Fig.4 Equivalent circuit www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 4/8 2009.06 - Rev.A Technical Note BH2227FV, BH2228FV ●Operation Description Command Transmission The Control command consists of 3-lines of 12bit serial input data (MSB first). Data is read at the rise edge of CLK, and data becomes valid in the CSB Low area (before the CSB rise for 12bit data). CSB 12 11 10 9 8 7 6 5 4 3 2 1 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CLK X DI X Fig.5 Data Settings D0 D1 0 0 1 0 0 1 1 1 0 0 D2 0 0 0 0 1 D3 0 0 0 0 0 1 1 1 1 D4 0 0 0 0 0 D5 0 0 0 0 0 D6 0 0 0 0 0 D7 0 0 0 0 0 1 1 1 1 1 1 1 1 ~ 0 1 1 1 Setting GND (VDD or VFS-GND)/256x1 (VDD or VFS-GND)/256x2 (VDD or VFS-GND)/256x3 (VDD or VFS-GND)/256x4 ~ (VDD or VFS-GND)/256x254 (VDD or VFS-GND)/256x255 Note: Initial status D[7:0]=00h Channel Settings D8 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D9 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. D10 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D11 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 5/8 BH2227FV Inconsequential AO1 AO2 Inconsequential Inconsequential AO3 AO4 Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential BH2228FV Inconsequential AO1 AO2 AO3 AO4 AO5 AO6 Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential Inconsequential 2009.06 - Rev.A Technical Note BH2227FV, BH2228FV ●Electrical Characteristics Curves 0.6 0.5 0.4 85℃ 0.3 25℃ -20℃ 0.2 0.1 3.0 0.5 0.4 85℃ 0.3 25℃ -20℃ 0.2 0.1 0.0 0.0 0.0 1.0 2.0 3.0 4.0 5.0 0.0 6.0 Fig.6 VDD current consumption 3.0 4.0 5.0 2.0 1.5 1.0 0.5 0.0 6.0 0 64 192 256 Fig.8 Output voltage characteristic 0.25 VDD=3.0V 0.8 0.20 0.6 0.2 128 INPUT CODE [dec] 1.0 VDD=3.0V 0.3 INL [LSB] 0.0 -0.1 DNL [LSB] 0.4 0.1 0.2 0.0 -0.2 0.15 0.10 -0.4 -0.2 0.05 -0.6 -0.3 -0.8 -0.4 0.00 -1.0 64 128 192 256 0 64 INPUT CODE [dec] 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 2.0 3.0 4.0 0.0 256 5.0 80.0 IL=1.0mA 70.0 60.0 50.0 85℃ 40.0 25℃ 30.0 -20℃ 20.0 10.0 0.0 0.0 6.0 1.0 2.0 3.0 4.0 5.0 Fig.12 Power source voltage to integral non linearity error 1.5 1.0 0.5 -50 -25 0 25 50 75 100 TEMPARATURE:Ta[℃] Fig.15 Reset release voltage www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 6.0 -40 -60 -80 -20℃ -100 25℃ -120 85℃ -140 1.0 2.0 3.0 4.0 5.0 6.0 SUPPLY VOLTAGE:VCC[V] Fig.14 Output full scale voltage 3.0 80 -20℃ 60 25℃ 85℃ 40 20 2.5 2.0 1.5 VIH 1.0 VIL 0.5 0.0 0 0.0 5.0 IL=1.0mA 0.0 INPUT VOLTAGE:VIL,VIH[V] SETTLING TIME:tOUT[µs] 2.0 4.0 0 -20 6.0 100 2.5 3.0 differential non linearity error Fig.13 Output zero scale voltage 3.0 2.0 Fig.11 Power source voltage to SUPPLY VOLTAGE:VCC[V] SUPPLY VOLTAGE:VCC[V] 1.0 SUPPLY VOLTAGE:VCC[V] Fig.10 Integral non linearity error ZERO SCALE VOLTAGE:ZS[mV] 0.45 1.0 192 INPUT CODE [dec] Fig.9 Differential non linearity error 0.0 128 FULL SCALE VOLTAGE:FS[mV] 0 INL [LSB] 2.0 Fig.7 VFS current consumption 0.4 DNL [LSB] 1.0 VDD=3.0V 2.5 SUPPLY VOLTAGE:VFS[V] SUPPLY VOLTAGE:VDD[V] RESET VOLTAGE:VPOR[V] OUTPUT VOLTAGE:Vo[V] CIRCUIT CURRENT:IFS[mA] CIRCUIT CURRENT:IDD[mA] 0.6 0.0 1.0 2.0 3.0 4.0 5.0 SUPPLY VOLTAGE:VCC[V] Fig.16 Settling time 6/8 6.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 SUPPLY VOLTAGE:VCC[V] Fig.17 Input voltage 2009.06 - Rev.A Technical Note BH2227FV, BH2228FV ●Operation Notes (1) Absolute maximum ratings Operating or testing the device over the maximum specifications may damage the part itself as well as peripheral components. Therefore, please ensure that the specifications are not exceeded. (2) GND potential Ensure that the GND terminal is at the lowest potential under all operating conditions. (3) Thermal design Use a thermal design that allows for a sufficient margin regarding power dissipation (Pd) under actual operating conditions. (4) Terminal shorts and mis-mounting Incorrect orientation or misalignment of the IC when mounting to the PCB may damage part. Short-circuits caused by The introduction of foreign matter between the output terminals or across the output and power supply or GND may also result in destruction. (5) Operation in a strong magnetic field Operation in a strong electromagnetic field may cause malfunction. (6) Set the power source voltage so that VDD ≧ VFS. (7) Reset function The power on reset circuit, which initializes internal settings, may malfunction during abrupt power ons. Therefore, set the time constant so as to satisfy the power source rise time. ●Thermal Derating Curve ・SSOP-B14 500 PD [mW] 400 300 200 100 0 0 25 50 75 100 125 Ta [℃] Board size : 70 x 70 x 1.6mm Material : FR4 glass epoxy board (copper foil area less than 3%) Fig.18 www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 7/8 2009.06 - Rev.A Technical Note BH2227FV, BH2228FV ●Ordering part number B H 2 Part No. 2 2 7 F Part No. V - E Package FV: SSOP-B14 2 Packaging and forming specification E2: Embossed tape and reel SSOP-B14 <Tape and Reel information> 5.0 ± 0.2 8 0.3Min. 4.4 ± 0.2 6.4 ± 0.3 14 1 Tape Embossed carrier tape Quantity 2500pcs Direction of feed E2 The direction is the 1pin 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 ) 7 0.10 1.15 ± 0.1 0.15 ± 0.1 0.65 0.1 0.22 ± 0.1 1pin Reel (Unit : mm) www.rohm.com © 2009 RzOHM Co., Ltd. All rights reserved. 8/8 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 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. 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. 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