MAX545BCSD+ Equivalent & Substitute Parts

Part Overview

The MAX545BCSD+ is a 14-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring voltage output conversion. This component features an R-2R architecture with 1µs typical settling time and operates from a 5V supply. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

MAX545BCSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 3429MAX545BCSD+ Datasheet

Current PartRFQ

AD5552BRZ

Analog Devices Inc.In Stock: 1419AD5552BRZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX545BCSD+ is determined by strict alignment of the following critical parameters:

• Resolution: 14-bit conversion capability
• Converter Count: Single D/A converter per package
• Output Configuration: Voltage output, unbuffered topology
• Interface Protocol: SPI serial data interface
• Reference Architecture: External reference requirement
• Linearity Performance: INL/DNL specifications of ±0.15 LSB
• Circuit Architecture: R-2R resistor ladder topology
• Package Form Factor: 14-SOIC surface mount package with 3.90mm width
• Supply Voltage Compatibility: Operation from 5V supplies
• Regulatory Compliance: ROHS3 and REACH compliance status

The AD5552BRZ meets all these criteria while offering extended operating temperature range and broader supply voltage tolerance, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The AD5552BRZ is the qualified substitute for the MAX545BCSD+ based on the following engineering criteria:

Functional Equivalence: All critical electrical parameters—resolution, settling time, linearity, interface protocol, and output configuration—are identical between the two devices. Both employ R-2R architecture with external reference configuration and SPI serial interface.

Package Compatibility: Both devices are housed in 14-SOIC surface mount packages with identical physical dimensions (0.154" width, 3.90mm), ensuring direct PCB footprint compatibility without layout modifications.

Supply Voltage Tolerance: The AD5552BRZ operates across 2.7V to 5.5V for both analog and digital supplies, encompassing the MAX545BCSD+ requirement of 5V operation. This extended range provides additional design flexibility.

Temperature Range Enhancement: The AD5552BRZ supports -40°C to 85°C operation, exceeding the MAX545BCSD+ range of 0°C to 70°C. Applications requiring the original temperature specification remain fully supported.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring continued compliance with environmental and hazardous substance regulations.

Product Status: The AD5552BRZ is actively manufactured by Analog Devices Inc., providing long-term availability and supply chain stability compared to the obsolete MAX545BCSD+.

Frequently Asked Questions (FAQ)

Q: Can the AD5552BRZ directly replace the MAX545BCSD+ without circuit modifications?

A: Yes. The AD5552BRZ is pin-compatible and functionally equivalent. Both devices share identical 14-SOIC package geometry, SPI interface protocol, and electrical specifications. No circuit redesign is required for substitution.

Q: Are there differences in supply voltage requirements between these parts?

A: The MAX545BCSD+ requires fixed 5V supplies. The AD5552BRZ accepts 2.7V to 5.5V for both analog and digital supplies. When operating at 5V, the AD5552BRZ meets all MAX545BCSD+ specifications. The extended voltage range of the substitute provides additional design margin.

Q: How do the settling time specifications compare?

A: Both devices specify 1µs typical settling time. Settling time performance is identical, ensuring equivalent transient response characteristics in data acquisition applications.

Q: What is the impact of the extended operating temperature range of the AD5552BRZ?

A: The AD5552BRZ supports -40°C to 85°C operation versus the MAX545BCSD+ range of 0°C to 70°C. Applications requiring the original 0°C to 70°C specification operate within the substitute's rated range. Extended temperature capability enables use in broader environmental conditions.

Q: Are the linearity specifications (INL/DNL) identical?

A: Yes. Both the MAX545BCSD+ and AD5552BRZ specify ±0.15 LSB for both integral nonlinearity (INL) and differential nonlinearity (DNL), ensuring equivalent conversion accuracy.

Q: Does the AD5552BRZ maintain the same RoHS and REACH compliance status?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance for environmental and hazardous substance requirements.

Q: What is the significance of the AD5552BRZ being an active product versus the MAX545BCSD+ being obsolete?

A: Active product status ensures ongoing manufacturing, availability, and technical support from Analog Devices Inc. The MAX545BCSD+ obsolescence status limits future procurement options and support resources. Transitioning to the AD5552BRZ provides long-term supply chain security.