The AD5668 is a low-power, 8-channel, 16-bit buffered voltage output DAC. The device operates from a single 2.7 V to 5.5 V supply and is designed to be monotonious.
The AD5668 has a built-in on-chip reference with an internal gain of 2. The AD5668-1 has a built-in 1.25 V, 5 ppm/°C reference with a full-scale output range of 2.5 V; The AD5668-2 and -3 have a built-in 2.5 V, 5 ppm/°C reference with a full-scale output range of up to 5 V. When powered on, the on-chip reference is turned off, allowing the use of an external reference. The internal voltage reference is enabled by software write.
The device has a built-in power-on reset circuit that ensures that the DAC output is powered up to 0 V (AD5668-1, -2) or medium range (AD5668-3) and maintains that level until a valid write operation is performed. In addition, it features independent power-saving features for each channel, reducing the device's power consumption to 400 nA at 5 V in power-saving mode and providing software-selectable output loads.
The /LDAC function allows you to update all DAC outputs at the same time, and you can also select the DAC channel to update at the same time. There is also an asynchronous/CLR function that is updated to user-programmable code: zero-level, medium-scale, or full-scale.
The AD5668 features a versatile three-wire serial interface that is capable of operating at clock rates up to 50 MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. It has a built-in on-chip precision output amplifier that enables rail-to-rail output swing.
AD5668-EP supports defense and aerospace applications (AQEC standard)
Product Focus
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8通道16位DAC。
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1.25 V/2.5 V、5 ppm/ºC片内基准电压源。
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提供14引脚/16引脚TSSOP封装。
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上电复位至0 V或中间电平。
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关断功能。关断模式下，3 V时DAC的典型功耗为200 nA，5 V时为400 nA。
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光收发器
功率放大器控制
数据采集系统
数字增益和失调电压调整