MAX520ACWE

Digital To Analog Converters Overview

The MAX520ACWE is a quad, 8-bit voltage-output digital-to-analog converter (DAC) featuring a simple 2-wire serial interface. It operates from a single +5V supply with an external reference input range spanning the supply rails. The device utilizes unbuffered outputs to achieve ultra-low supply current of 4µA and provides increased accuracy at low output currents. Key electrical parameters include a settling time of 2µs, ±1 LSB DNL/INL, and a signal-to-noise ratio of 87 dB.

Digital To Analog Converters Feature Summary

• Quad-channel 8-bit resolution with unbuffered voltage outputs
• I2C-compatible 2-wire serial interface supporting up to 400kbps
• Ultra-low power consumption with 4µA operating and shutdown current
• Individual reference inputs for each DAC channel

Digital To Analog Converters Applications

• Minimum component analog systems
• Digital offset and gain adjustment circuits
• Industrial process control instrumentation
• Automatic test equipment
• Programmable attenuators

Digital To Analog Converters Procurement Notes

Verify the specific package variant, as the MAX520 series includes DIP, Wide SO, and SSOP options. Confirm that the 'AC' suffix denotes the commercial temperature range (0°C to +70°C). Ensure the design accounts for the unbuffered output architecture, which differs from the buffered MAX521 variants. Cross-reference the ordering information in the official datasheet to confirm availability and exact pinout compatibility.

Digital To Analog Converters Selection Notes

Select the MAX520ACWE when low power consumption and high accuracy at low output currents are prioritized over drive capability. The unbuffered outputs require careful consideration of load impedance compared to the buffered MAX521. This part is suitable for applications requiring individual reference inputs per channel and simultaneous updates via double-buffered latches. Verify that the system can support the required I2C bus timing constraints.

Digital To Analog Converters Part Context

The MAX520 belongs to a family of quad and octal 8-bit DACs designed for low-power, space-constrained applications. It complements the MAX521, which features rail-to-rail buffered outputs. Both devices share the same serial interface protocol and architectural foundation, allowing for flexible system design based on output drive requirements and power budgets within the Maxim Integrated portfolio.

Digital To Analog Converters Replacement Considerations

The MAX520ACAP+ is a direct replacement for the older MAX520ACAP. When substituting, verify that the new component matches the required package type and temperature grade. Ensure that any legacy designs relying on the discontinued part number are updated to reflect the RoHS-compliant version without altering the functional interface or pin configuration.

Digital To Analog Converters FAQ

How does the MAX520 handle data updates?

The MAX520 uses a double-buffered input configuration. Data is transferred to the input latch during transmission and moves to the output latch only upon detection of a STOP condition, allowing all DAC channels to update simultaneously.

What is the behavior of the outputs in power-down mode?

In power-down mode, the MAX520's unbuffered outputs appear as a 16kΩ resistor to AGND, reducing the supply current to a maximum of 20µA.

Can multiple MAX520 devices operate on the same bus?

Yes, up to eight MAX520 devices can be connected to the same 2-wire serial bus by configuring the AD0, AD1, and AD2 address pins to unique logic levels.