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DAC8228

Dual 8-Bit CMOS D/A Converter with Voltage Output

Dual8-BitCMOSD/AConverterwithVoltageOutput

DAC8228

單芯片雙通道8位CMOS電壓輸出D/A轉(zhuǎn)換器; ? 單芯片結(jié)構(gòu)，集成2個8位電壓輸出DAC\n\n? 適合7528/7628插口\n\n? 無需調(diào)整的內(nèi)部CMOS運算放大器\n\n? +12V至+15V單電源供電;

DAC-8228是一款單芯片式雙通道8位電壓輸出CMOS D/A轉(zhuǎn)換器。設(shè)計用于安裝于AD7528/7628插口之中，在硬盤驅(qū)動器等應(yīng)用中無需使用兩個外部運算放大器。一般情況下，這些應(yīng)用以應(yīng)用于VREF 的零伏特電壓來驅(qū)動AD7528/7628，并將AGND偏置至+2.5V或+5V。DAC-8228已通過這些條件的測試。\n\nDAC-8228也可用于要求單極性輸出電壓的應(yīng)用。其輸出電壓范圍為0V至+10V，VDD=+14V（最大輸出電壓為VDD-4V）。DAC-8228的基準(zhǔn)輸入可以接受0V至-10V的負(fù)電壓（DAC的內(nèi)部單位增益反相放大器使輸入信號反相）。對于雙極性應(yīng)用，請選擇DAC-8229。\n\nDAC8228采用CerDIP和塑封封裝，工作溫度范圍為-40°至+85°C擴展工業(yè)溫度范圍。要求軍用溫度范圍的應(yīng)用須使用DAC-8229。為了使DAC-8229與DAC-8228在引腳和功能上兼容，AGND A和AGND B應(yīng)連接在一起以充當(dāng)VZ，并將VSS連接至GND。\n\nDAC-8228由2個CMOS電壓輸出放大器、2個高精度R-2R電阻梯形網(wǎng)絡(luò)、接口控制邏輯和2個8位寄存器構(gòu)成。一個內(nèi)部調(diào)節(jié)器則可在整個VDD范圍內(nèi)維持TTL邏輯兼容性和快速微處理器接口時序性能。 DAC-8228功耗僅為90mW，采用20引腳0.3\" DIP封裝或20引腳SO表貼封裝，有利于節(jié)省空間。尺寸小、功耗低、單位通道成本低等特性使其成為采用多個D/A轉(zhuǎn)換器而又不犧牲電路板空間的應(yīng)用的理想之選。部件數(shù)量減少后也有利于提升系統(tǒng)可靠性。\n\n利用PMI先進的氧化物隔離、硅門極CMOS工藝，加上高度穩(wěn)定的薄膜電阻梯形網(wǎng)絡(luò)，使DAC-8228具有出色的DAC間匹配和溫度跟蹤能力。\n\n

DAC8228

八路、低功耗、14 位、+/-16.5V 輸出并行輸入數(shù)模轉(zhuǎn)換器; ? Bipolar Output: ±3V, up to ±16.5V\n? Unipolar Output: 0V to +33V\n? 14-Bit Resolution\n? Low Power: 13.5mW/Ch\n? Relative Accuracy: 1LSB Max\n? Flexible User Calibration\n? Low Zero/Full-Scale Error \n? Before User Calibration: ±2.5 LSB Max\n? After User Calibration: ±1 LSB\n \n? Low Glitch: 4nV-s\n? Settling Time: 15μs\n? Channel Monitor Output\n? Programmable Gain: x4, x6\n? Programmable Offset\n? 14-Bit Parallel Interface: 50MHz (Write Operation)\n? Packages: QFN-56 (8mm x 8mm), TQFP-64 (10mm x 10mm)\n? APPLICATIONS \n? Automatic Test Equipment\n? PLC and Industrial Process Control\n? Communications;

The DAC8228 is a low-power, octal, 14-bit digital-to-analog converter (DAC). With a 5V reference, the output can either be a bipolar ±15V voltage when operating from a dual ±15.5V (or higher) power supply, or a unipolar 0V to +30V voltage when operating from a +30.5V power supply. With a 5.5V reference, the output can be ±16.5V for a dual ±17V (or higher) power supply, or a unipolar 0V to +33V voltage when operating from a +33.5V (or higher) power supply. This DAC provides low-power operation, good linearity, and low glitch over the specified temperature range of –40°C to +105°C. This device is trimmed in manufacturing and has very low zero and full-scale error. In addition, user calibration can be performed to achieve ±1 LSB bipolar zero/full-scale error for a bipolar supply, or ±1 LSB zero-code/full-scale error for a unipolar supply over the entire signal chain. The output range can be offset by using the DAC Offset Register.The DAC8228 features a standard, high-speed, 14-bit parallel interface that operates at up to 50MHz and is 1.8V, 3V, and 5V logic compatible, to communicate with a DSP or microprocessor. The eight DACs and the auxiliary registers are addressed with five address lines. The device features double-buffered interface logic. An asynchronous load input (LDAC) transfers data from the DAC data register to the DAC latch. The asynchronous CLR input sets the output of all eight DACs to AGND. The VMON pin is a monitor output that connects to the individual analog outputs, the offset DAC, and the reference buffer outputs through a multiplexer (mux).The DAC8228 is pin-to-pin compatible with the DAC8728 (16-bit) and the DAC7728 (12-bit).

DAC8228

Octal, 14-Bit, Low-Power, High-Voltage Output, Parallel Input DIGITAL-TO-ANALOG CONVERTER

DAC8228FP

Dual 8-Bit CMOS D/A Converter with Voltage Output

Dual8-BitCMOSD/AConverterwithVoltageOutput

DAC8228FR

Dual 8-Bit CMOS D/A Converter with Voltage Output

Dual8-BitCMOSD/AConverterwithVoltageOutput

DAC8228FS

Dual 8-Bit CMOS D/A Converter with Voltage Output

Dual8-BitCMOSD/AConverterwithVoltageOutput

DAC8228_15

Dual 8 Bit CMOS D/A Converter with Voltage Output

DAC8228SPAG

Octal, 14-Bit, Low-Power, High-Voltage Output, Parallel Input DIGITAL-TO-ANALOG CONVERTER

DAC8228SPAGR

Octal, 14-Bit, Low-Power, High-Voltage Output, Parallel Input DIGITAL-TO-ANALOG CONVERTER