DAC-8228æ¯ä¸æ¬¾åè¯çå¼åéé8ä½çµåè¾åºCMOS D/A转æ¢å¨ã设计ç¨äºå®è£
äºAD7528/7628æå£ä¹ä¸ï¼å¨ç¡¬ç驱å¨å¨çåºç¨ä¸æ é使ç¨ä¸¤ä¸ªå¤é¨è¿ç®æ¾å¤§å¨ãä¸è¬æ
åµä¸ï¼è¿äºåºç¨ä»¥åºç¨äºVREF çé¶ä¼ç¹çµåæ¥é©±å¨AD7528/7628ï¼å¹¶å°AGNDåç½®è³+2.5Væ+5VãDAC-8228å·²éè¿è¿äºæ¡ä»¶çæµè¯ã
DAC-8228ä¹å¯ç¨äºè¦æ±åææ§è¾åºçµåçåºç¨ãå
¶è¾åºçµåèå´ä¸º0Vè³+10Vï¼VDD=+14Vï¼æå¤§è¾åºçµå为VDD-4Vï¼ãDAC-8228çåºåè¾å
¥å¯ä»¥æ¥å0Vè³-10Vçè´çµåï¼DACçå
é¨åä½å¢çåç¸æ¾å¤§å¨ä½¿è¾å
¥ä¿¡å·åç¸ï¼ã对äºåææ§åºç¨ï¼è¯·éæ© DAC-8229ã
DAC8228éç¨CerDIPåå¡å°å°è£
ï¼å·¥ä½æ¸©åº¦èå´ä¸º-40°è³+85°Cæ©å±å ·¥ä¸æ¸©åº¦èå´ãè¦æ±åç¨æ¸©åº¦èå´çåºç¨é¡»ä½¿ç¨DAC-8229ã为äºä½¿DAC-8229ä¸DAC-8228å¨å¼èååè½ä¸å
¼å®¹ï¼AGND AåAGND Båºè¿æ¥å¨ä¸èµ·ä»¥å
å½VZï¼å¹¶å°VSSè¿æ¥è³GNDã
DAC-8228ç±2个CMOSçµåè¾åºæ¾å¤§å¨ã2个é«ç²¾åº¦R-2Rçµé»æ¢¯å½¢ç½ç»ãæ¥å£æ§å¶é»è¾å2个8ä½å¯å卿æãä¸ä¸ªå
é¨è°èå¨åå¯å¨æ´ä¸ªVDDèå´å
ç»´æTTLé»è¾å
¼å®¹æ§åå¿«éå¾®å¤ç卿¥å£æ¶åºæ§è½ã
DAC-8228åèä»
为90mWï¼éç¨20å¼è0.3" DIPå°è£
æ20å¼èSO表贴å°è£
ï¼æå©äºèç空é´ã尺寸å°ãåèä½ãåä½ééææ¬ä½çç¹æ§ä½¿å
¶æä¸ºéç¨å¤ä¸ªD/A转æ¢å¨èåä¸çºç ²çµè·¯æ¿ç©ºé´çåºç¨ççæ³ä¹éãé¨ä»¶æ°éåå°å乿å©äºæåç³»ç»å¯é æ§ã
å©ç¨PMIå
è¿çæ°§åç©é离ãç¡
鍿CMOSå·¥èºï¼å ä¸é«åº¦ç¨³å®çèèçµé»æ¢¯å½¢ç½ç»ï¼ä½¿DAC-8228å
·æåºè²çDACé´å¹é
忏©åº¦è·è¸ªè½åã