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四路串行输入12位/10位数模转换器ad7398/ad7399数据表
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The AD7398/AD7399 family of quad， 12-bit/10-bit， voltage output digital-to-analog converters （DACs） is designed to operate from a single 3 V to 5 V supply or a dual ±5 V supply. Built with the Analog Devices， Inc. robust CBCMOS process， these monolithic DACs offer the user low cost with ease-of-use in single or dual-supply systems. The applied external reference， VREF， determines the full-scale output voltage. Valid VREF values include VSS 《 VREF 《 VDD that result in a wide selection of full-scale outputs. For multiplying applications， ac inputs can be as large as ±5 VP. A doubled-buffered serial-data interface offers high speed， 3-wire， SPI- and microcontroller-compatible inputs using serial data-in （SDI）， clock （CLK）， and a chip-select （CS）。 A common levelsensitive， load-DAC strobe （LDAC） input allows simultaneous update of all DAC outputs from previously loaded input registers. Additionally， an internal power-on reset forces the output voltage to zero at system turn on. An external asynchronous reset （RS） also forces all registers to the zero code state. A programmable powershutdown feature reduces power dissipation on unused DACs.
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