MAX5632UCB+TD

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The MAX5632UCB+TD (MAX5632) is a digitally programmable, low-power, CMOS programmable voltage output DAC manufactured by Maxim Integrated. The device provides up to 10 bits of resolution, and is designed for industrial applications, instrumentation, and sensors.

The device is part of the Acquisition - Digital to analog converters (DAC) family, which are commonly used to transform digital signals into analog signals. Specifically, the MAX5632 incorporates a Temperature Dependent Offset (TD) feature which allows it to resist extreme temperatures without accuracy loss.

It provides a maximum output voltage of 2.5V, with a Zero Load Output Voltage (ZLO) of 0V. It is capable of providing current up to ±25mA depending on the elements chosen, and has an output impedance of 0.5ohms. Furthermore, it has a programmable settling time of 0.1µs - 25µs, and is capable of achieving very low total harmonic distortion (THD).

The MAX5632 features low power consumption and can operate at an supply voltage from 2.5V to 5.0V making it suitable for battery and low power applications. It requires no external references as it runs from an internal bandgap reference and utilizes EDN technology for minimal component count and board space. It can be used in single and dual voltage-output DAC configurations and is available in 8-pin SOIC and 8-pin PDIP packages.

Applications for the MAX5632 include sensor calibration systems, temperature control, digital potentiometers and current-shunt measurement. It can also be used in automotive, telecommunications, power management and medical monitoring applications.

The device has a SPI/QTC interface, allowing it to be read, written to, and configured by an external microcontroller or system, without the need for components or programming. Its output can be configured to either be open-drain or push-pull and it can be set for either unipolar or bipolar operation. The output code can be updated for the next value on the rising edge of the SCLK.

The working principle of the MAX5632 is straightforward. The incoming values from the SPI/QTC interface are converted to an Analog voltage output by an on-chip Digital-to-Analog (D/A) converter which is based on an resistive ladder network. The higher bits control the switching of capacitors on a series path. The Digital-to-Analog conversion relies on the relative accuracy of these capacitors and the resistors in the ladder network.

It also features a built-in Temperature Dependent Offset (TD). The device is designed to compensate its own uneven temperature behavior. The TD feature can be enabled or disabled. When the TD feature is enabled the output is simultaneously transmitted to the on-chip temperature sensor which then adjusts the output to compensate for temperate changes. This ensures that the output of the device is accurate over a wide range of temperatures without the need to recalibrate.

The MAX5632 is an ideal solution for applications that require precise low-voltage analog output. It offers a high level of flexibility and its robust capabilities make it suitable for a wide range of applications. It is available at a low cost point with a minimum operating temperature of -40°C and a maximum operating temperature of +85°C.

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