DAC7634E

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DAC7634E is a high-performance 10-bit buffered digital-to-analog converter (DAC) designed for precise voltage control applications. Its typical application field can be instrumentation, medical devices, communications and digital control loops. The device features a tightly regulated internal voltage reference and a high voltage output amplifier that is capable of driving to within 5 mV of the VDD and VSS supplies.

The DAC7634E has a buffered voltage output, which provides a low output impedance and rail-to-rail operation. The output amplifier has user-selectable shut down and force-to-zero control pins, while the internal reference can be set to any value of VDD plus or minus 5 %. Also, the DAC7634E contains a power-on reset, fast settling time and a 0.45 V to VDD full-scale accuracy.

The device has an internal architecture based on a Pseudo-Differential Topology with an internal 10-bit DAC. It is designed for low power dissipation and operation with a single 5 V or ±5 V supply. Additionally, the DAC7634E has a buffered voltage output, which provides a low output impedance and rail-to-rail operation.

The DAC7634E\'s input latch and decoder are shared by the 8- and 10-bit DACs. The input latch receives the 10-bit digital input and stores it until a write pulse is asserted. The decoder receives the 10-bit input data and translates it into codes for loading the DAC. Additionally, the power-on reset (POR) function is also part of the DAC7634E\'s operation. Every time the POR is enabled and the power supply is stable, the DAC7634E will reset to a full-scale output level of VREF.

The DAC7634E also has a range of versatile functions, including an integrated up/down count and two analog inputs. The up/down count is a 4-bit binary up/down counter and can be used to provide a smooth transition from the output voltage to a particular bit weight, increasing or decreasing the output voltage one count at a time depending on the direction of the control signal. Also, the two multiplexed analog reference inputs can be used to allow the user to select between two voltage references, thus allowing multiple product configurations.

Finally, the DAC7634E is protected against over-voltage and short-circuit on the output. This is achieved through the use of the internal voltage regulator, which limits the output voltage to VDD + 0.5 V max. Additionally, the device has ESD protection of 8 kV (human body model).

In conclusion, the DAC7634E is a high-performance 10-bit digital-to-analog converter designed for precise voltage control applications. It features a tightly regulated internal voltage reference, power-on reset and fast settling time, making it ideal for applications in instrumentation, medical devices, communications and digital control loops. Additionally, its buffered voltage output provides low output impedance and rail-to-rail operation, while the two analog inputs allow the user to select between two voltage references. Finally, it is protected against over-voltage and short-circuit on the output.

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