DAC8420ESZ

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The DAC8420ESZ belongs to the family of digital to analog converters (DAC). It performs the necessary conversion of digital code words into corresponding analog voltages. Its application field is diverse and ever-expanding due to the miniaturization of technology.

DAC8420ESZ is a precision 16-bit, quad-channel, single-supply digital-to-analog converter (DAC). It features 4 low-inertia tracking switches, 4 x 100 MHz bandwidth, low distortion, and wide dynamic range. The output voltages are independently adjustable from 0 mV to 1.2 V with a monotonically increasing code. It also has a built-in 10 ppm/K temperature drift correction to maintain a steady 1.2 V output. It is typically used for instrumentation, personal communication, and microwave application systems.

The DAC8420ESZ works on the principle of a binary weighted, 2\'s complement digital to analog converter. It uses four identical building blocks, each consisting of an integration configurable analog switch, a building-block resistor network, a parallel connected capacitor, and an output filter. The 4 low-inertia tracking switches feed a binary weighted resistor-string. The exponents of the binary numbers are set by the 16 bits input DAC8420ESZ and the value of the output voltage is proportional to the sum of the weighted resistors. The analog output voltage is obtained by a low-pass filter connected at the output of the DAC. The filter enhances the transient response of the DAC and ensures that no frequency components outside the low-pass filter are generated.

The DAC8420ESZ comes with several features for accurate and stable operation. It includes internal reference sources for both positive and negative outputs. The reference sources are temperature-compensated to minimize drift. The power-on reset ensures that the DAC output is held in linear operation within specifications before the output voltage is updated. The conversion time is fast enough for high-speed systems. The drift in output tracking is minimized with the on-chip temperature compensation.

In conclusion, the DAC8420ESZ is a high-precision digital-to-analog converter with four 16-bit channels and wide dynamic range. It offers low-inertia tracking switch, low distortion and 10 ppm/K temperature drift correction. It is ideal for instrumentation, personal communications, and microwave application systems.

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