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DAC8222

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222

雙通道12位雙緩沖乘法CMOS D/A轉(zhuǎn)換器; ? 2個(gè)匹配12位DAC集成于單個(gè)芯片之中\(zhòng)n\n? 直接并行加載所有12位數(shù)據(jù)，提高數(shù)據(jù)吞吐量\n\n? 雙緩沖數(shù)字輸入\n\n? 12位端點(diǎn)線性度（±1/2 LSB全溫度范圍）\n\n? +5V至+15V單電源供電;

DAC-8222是一款雙通道12位雙緩沖CMOS數(shù)模轉(zhuǎn)換器。該器件有一個(gè)12位寬的數(shù)據(jù)端口，支持直接加載12位數(shù)據(jù)字。在獨(dú)立系統(tǒng)中或與16位處理器接口時(shí)，這種設(shè)計(jì)可以加快吞吐時(shí)間。利用一個(gè)共用12位輸入TTL/CMOS兼容數(shù)據(jù)端口將12位寬數(shù)據(jù)字載入兩個(gè)DAC之一。該端口的數(shù)據(jù)加載結(jié)構(gòu)與RAM的寫入周期類似，直接與多數(shù)12位和16位總線系統(tǒng)接口。（參見(jiàn)PMI DAC-8248，了解一種完整的8位數(shù)據(jù)總線接口產(chǎn)品。）共用總線設(shè)計(jì)使DAC-8222可以采用24引腳0.3\" DIP窄體封裝，有利于節(jié)省PCB空間。\n\n該DAC由WR和LDAC兩個(gè)信號(hào)控制。在這些輸入端，當(dāng)邏輯為低電平時(shí)，DAC寄存器變成透明狀態(tài)。這樣，直接無(wú)緩沖數(shù)據(jù)可以直接流向由DAC A/DAC B選擇的DAC輸出端。另外，DAC的雙緩沖數(shù)字輸入端允許兩個(gè)DAC同步更新。\n\nDAC8222采用單芯片結(jié)構(gòu)，可在整個(gè)工作溫度范圍內(nèi)提供良好的DAC-DAC匹配和跟蹤能力。芯片由2個(gè)薄膜R-2R電阻梯形網(wǎng)絡(luò)、4個(gè)12位寄存器和DAC控制邏輯電路構(gòu)成。該器件為各個(gè)DAC配置了獨(dú)立的基準(zhǔn)輸入電阻和反饋電阻，采用單電源供電，電壓范圍為+5 V至+15 V。當(dāng)電源電壓為+5 V且采用零或VDD邏輯電平時(shí)，功耗不到0.5 mW。\n\nDAC8222基于一種先進(jìn)的氧化物隔離、硅門極CMOS工藝，采用PMI高度穩(wěn)定的薄膜電阻制成。PMI改進(jìn)型防閂鎖設(shè)計(jì)消除了采用外部保護(hù)肖特基二極管的需要。\n\n

DAC8222BTC/883

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222BTCSLASH883

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222EW

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222FP

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222FS

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222FW

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222GP

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter

GENERALDESCRIPTION TheDAC8222isadual12-bit,double-buffered,CMOSdigital-to-analogconverter.Ithasa12-bitwidedataportthatallowsa12-bitwordtobeloadeddirectly. FEATURES TwoMatched12-BitDACsonOneChip DirectParallelLoadofAll12BitsforHighData

DAC8222_15

Dual 12-Bit Double-Buffered Multiplying CMOS D/A Converter