DAC8228

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

Dual8-BitCMOSD/AConverterwithVoltageOutput

DAC8228

单芯片双通道8位CMOS电压输出D/A转换器; • 单芯片结构，集成2个8位电压输出DAC\n\n• 适合7528/7628插口\n\n• 无需调整的内部CMOS运算放大器\n\n• +12V至+15V单电源供电;

DAC-8228是一款单芯片式双通道8位电压输出CMOS D/A转换器。设计用于安装于AD7528/7628插口之中，在硬盘驱动器等应用中无需使用两个外部运算放大器。一般情况下，这些应用以应用于VREF 的零伏特电压来驱动AD7528/7628，并将AGND偏置至+2.5V或+5V。DAC-8228已通过这些条件的测试。\n\nDAC-8228也可用于要求单极性输出电压的应用。其输出电压范围为0V至+10V，VDD=+14V（最大输出电压为VDD-4V）。DAC-8228的基准输入可以接受0V至-10V的负电压（DAC的内部单位增益反相放大器使输入信号反相）。对于双极性应用，请选择DAC-8229。\n\nDAC8228采用CerDIP和塑封封装，工作温度范围为-40°至+85°C扩展工业温度范围。要求军用温度范围的应用须使用DAC-8229。为了使DAC-8229与DAC-8228在引脚和功能上兼容，AGND A和AGND B应连接在一起以充当VZ，并将VSS连接至GND。\n\nDAC-8228由2个CMOS电压输出放大器、2个高精度R-2R电阻梯形网络、接口控制逻辑和2个8位寄存器构成。一个内部调节器则可在整个VDD范围内维持TTL逻辑兼容性和快速微处理器接口时序性能。 DAC-8228功耗仅为90mW，采用20引脚0.3\" DIP封装或20引脚SO表贴封装，有利于节省空间。尺寸小、功耗低、单位通道成本低等特性使其成为采用多个D/A转换器而又不牺牲电路板空间的应用的理想之选。部件数量减少后也有利于提升系统可靠性。\n\n利用PMI先进的氧化物隔离、硅门极CMOS工艺，加上高度稳定的薄膜电阻梯形网络，使DAC-8228具有出色的DAC间匹配和温度跟踪能力。\n\n

DAC8228

八路、低功耗、14 位、+/-16.5V 输出并行输入数模转换器; • 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