MAX5120BEEE+T

Digital To Analog Converters Overview

The MAX5120BEEE+T is a low-power, 12-bit voltage-output digital-to-analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated. Operating on a single +5V supply, it features an internal precision bandgap reference of +2.5V and an output amplifier capable of a +4.095V full-scale output range. The device draws 500µA in normal operation, reducing to 3µA in power-down mode. It utilizes a 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards. Key electrical parameters include a typical settling time of 20µs, integral nonlinearity (INL) of ±1 LSB, and differential nonlinearity (DNL) of ±1 LSB. The component is housed in a 16-pin QSOP package and specified for the extended industrial temperature range of -40°C to +85°C.

Digital To Analog Converters Feature Summary

• 12-bit resolution with R-2R architecture and buffered voltage output
• Internal +2.5V precision bandgap reference with <10ppm/°C temperature coefficient
• 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols
• Software and hardware programmable shutdown mode reducing current to 3µA

Digital To Analog Converters Applications

• Industrial Process Controls
• Automatic Test Equipment (ATE)
• Digital Offset and Gain Adjustment
• Motion Control Systems
• Microprocessor-Controlled Systems

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'B' indicates the accuracy grade with ±1 LSB INL/DNL limits as defined in the datasheet. Confirm the '+T' designation corresponds to reel packaging. Ensure the source document explicitly links this part number to the MAX5120 specifications rather than the pin-compatible MAX5121 variant. Cross-reference the manufacturer's ordering information to confirm availability status.

Digital To Analog Converters Selection Notes

Select the MAX5120BEEE+T when a single +5V supply is available and a full-scale output near 4.095V is required. Choose this model over the MAX5121 if higher output swing is necessary, noting that the MAX5121 operates on +3V. Consider the pin-compatible MAX5130 or MAX5170 if upgrades to 13-bit or 14-bit resolution are needed without changing the PCB layout. Verify that the 20µs settling time meets the system's dynamic performance requirements.

Digital To Analog Converters Part Context

The MAX5120BEEE+T belongs to the MAX5120/MAX5121 family of serial DACs. It is pin-compatible with the MAX5121 (3V version), MAX5130/MAX5131 (13-bit versions), and MAX5170/MAX5172 (14-bit versions). This compatibility allows for design flexibility across different resolution and voltage requirements within the same footprint. The 'B' suffix denotes the specific accuracy class for this component.

Digital To Analog Converters Replacement Considerations

Pin-compatible replacements include the MAX5121AEEE+T (3V operation), MAX5130BEEE+T (13-bit), and MAX5170BEEE+T (14-bit). These alternatives maintain the same 16-pin QSOP footprint and interface but offer different voltage ranges or increased resolution. Verify that the supply voltage and output swing requirements align with the substitute part before implementation.

Digital To Analog Converters FAQ

How does the MAX5120BEEE+T handle power-up reset states?

The device features a user-selectable power-up reset via the RSTVAL pin. Tying RSTVAL to VDD sets the initial output to mid-scale, while tying it to DGND sets it to 0V, minimizing output glitches during power-up.

Can the internal reference be overridden?

Yes, the internal +2.5V reference can be disabled by pulling the REFADJ pin to VDD. An external reference voltage can then be applied to the REF pin, allowing for AC- or DC-based reference signals within the input voltage limits.

What is the maximum serial clock frequency?

The maximum guaranteed serial clock frequency is 10MHz for the MAX5120 series. This allows for fast data loading into the double-buffered input register.