BH2222FV Standard ICs 8bit 20ch D/A converter BH2222FV BH2222FV is an 8bit D/A converter for electronic adjustment. The 20-channel output voltage can be independently controlled by three-wire serial interface from micro-controller. The built-in power on reset circuit keeps the output state Low after the power is on. 4-channel have data register function. Two kinds of set voltage can be retained, and output voltage can be switched by SEL pin. zApplications The voltage adjustment for DVC, DSC etc. zExternal dimensions (Unit : mm) 10.0±0.2 15 1 14 1.15±0.1 0.1 zFeatures 1) 8bit 20-channel D/A converters adopting R-2R system. 2) 3-wire + 1-wire 16-bit serial interface. 3) POWER ON RESET circuit. 4) The full scale output voltage range : 2.7 ~ 5.5V. 5) It is possible to set the two output full scale level independently. 6) 4-channel date Register extension function. 7) SSOP-B28 package. 0.3Min. 7.6±0.3 5.6±0.2 28 0.65 0.15±0.1 0.1 0.22±0.1 SSOP-B28 zAbsolute maximum ratings (Ta=25°C) Parameter Symbol Limits Unit Power supply voltage VCC −0.3~+7.0 V Maximum output voltage VIN −0.3~VCC V Tstg −55~+125 640 ∗ mW Storage temperature Power dissipation Pd °C ∗Reduced by 6.4mW for each increase in Ta of 1°C over 25°C. This product is not designed for protection against radioactive rays. zRecommended operating conditions (Ta=25°C) Symbol Min. Typ. Max. Unit VCC supply voltage Parameter VCC 4.5 − 5.5 V VDD1 supply voltage VDD1 2.7 − VCC V VDD2 supply voltage VDD2 2.7 − VCC V Analog output source current IOL − − 1.0 mA Analog output sink current IOH − − 1.0 mA Operating temperature range Clock frequency Limit load capacitance Topr −20 − 85 °C FSCLK − 1.0 − MHz CL − − 0.47 µF Please set to VCC ≥ VDD1, VDD2. Rev.A 1/3 BH2222FV Standard ICs zBlock diagram VCC 1 VDD2 2 POWER_ON RESET 28 CLK Serial interface VCC AO2 6 AO3 7 AO4 8 AO5 9 AO6 10 AO7 11 AO8 12 VDD1 13 GND 14 EXD 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC R-2R DAC 8bitREG + DEC 8bitREG + DEC R-2R DAC VDD1 26 EX4 25 EX3 24 AO16 23 AO15 22 AO14 21 AO13 20 AO12 VCC 5 EXD 8bitREG + DEC R-2R DAC VDD1 AO1 R-2R DAC VCC 4 EXD 8bitREG + DEC VCC EX2 R-2R DAC EXD 8bitREG + DEC VDD1 3 VCC EX1 27 DI VDD2 VDD2 VDD2 19 AO11 18 AO10 17 AO9 16 SEL 15 LD Rev.A 2/3 BH2222FV Standard ICs zPin descriptions Pin No. Pin name In / Out Power supply − − Power supply pin − − Power supply pin OUT VDD2 Functions 1 VCC 2 VDD2 3 EX1 4 EX2 OUT VDD2 5 AO1 OUT VDD2 6 AO2 OUT VDD2 7 AO3 OUT VDD2 8 AO4 OUT VDD1 9 AO5 OUT VDD1 10 AO6 OUT VDD1 11 AO7 OUT VDD1 12 AO8 OUT VDD1 13 VDD1 − − 14 GND − − Common GND pin 15 LD IN − Serial Load input pin Select extended data register pin Analog output pins (Register extension) Analog output pins Power supply pin 16 SEL IN − 17 AO9 OUT VDD1 18 AO10 OUT VDD1 19 AO11 OUT VDD1 20 AO12 OUT VDD1 21 AO13 OUT VDD1 22 AO14 OUT VDD2 23 AO15 OUT VDD2 24 AO16 OUT VDD2 25 EX3 OUT VDD2 26 EX4 OUT VDD2 27 DI IN − Serial Data input pin 28 CLK IN − Serial Clock input pin Analog output pins Analog output pins (Register extension) Rev.A 3/3 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.1