AD7781BRZ Equivalent & Substitute Parts

Part Overview

The AD7781BRZ is a 20-bit Analog to Digital Converter manufactured by Analog Devices Inc., designed for precision data acquisition applications. This device features a single differential input with sigma-delta architecture and integrated programmable gain amplifier (PGA), operating across a wide supply voltage range of 2.7V to 5.25V for both analog and digital domains. The component is actively produced and maintains full ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1). Alternative part selection becomes necessary in scenarios involving component availability constraints, supply chain disruptions, or inventory optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

AD7781BRZ

Analog Devices Inc.In Stock: 2308AD7781BRZ Datasheet

Current PartRFQ

AD7781CRZ

Analog Devices Inc.In Stock: 2250AD7781CRZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7781BRZ is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part AD7781CRZ qualifies as a direct parametric equivalent based on the following criteria:

Electrical Parameter Equivalence:

• Identical 20-bit resolution and 16.7 samples per second sampling rate
• Matching single differential input configuration with sigma-delta architecture
• Identical PGA-ADC configuration with external reference type
• Matching supply voltage ranges: 2.7V ~ 5.25V for both analog and digital supplies
• Identical operating temperature range: -40°C ~ 105°C
• Identical SPI data interface specification

Mechanical & Compliance Equivalence:

• Identical 14-SOIC package with 0.154" (3.90mm) width
• Surface mount mounting type
• Identical ROHS3 compliance status
• Identical MSL 1 (Unlimited) moisture sensitivity rating
• Identical REACH and ECCN classifications

Parameter Comparison

Engineering Selection Recommendations

Both AD7781BRZ and AD7781CRZ are actively produced components from Analog Devices Inc. with identical electrical specifications, package configurations, and regulatory compliance certifications. Selection between these parts should be based on availability and supply chain considerations. Both components maintain ROHS3 compliance and are unaffected by REACH regulations, making them suitable for applications requiring environmental compliance. The identical MSL 1 rating indicates both parts are suitable for standard PCB assembly processes without special moisture control requirements. No technical differentiation exists between these parts for circuit design or application purposes.

Frequently Asked Questions (FAQ)

Q: Can AD7781CRZ be used as a direct replacement for AD7781BRZ in existing designs?

A: Yes. The AD7781CRZ is a direct parametric equivalent with identical electrical specifications, pin configuration, package type, and operating characteristics. No circuit modifications or design changes are required for substitution.

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

A: No. Both AD7781BRZ and AD7781CRZ require identical analog and digital supply voltages of 2.7V to 5.25V. Power supply design remains unchanged.

Q: Do these parts have different temperature operating ranges?

A: No. Both components operate across the identical temperature range of -40°C to 105°C. Thermal management requirements are equivalent.

Q: Is the 14-SOIC package identical for both parts?

A: Yes. Both parts use the same 14-SOIC package with 0.154" (3.90mm) width. PCB footprints and assembly processes are identical.

Q: Are there compliance or certification differences?

A: No. Both AD7781BRZ and AD7781CRZ maintain identical ROHS3 compliance, MSL 1 rating, and REACH status. Regulatory requirements are equivalent.

Q: What is the sampling rate for these converters?

A: Both parts operate at 16.7 samples per second with 20-bit resolution using sigma-delta architecture.

Q: Can these parts be used interchangeably in production?

A: Yes. From an engineering and manufacturing perspective, these parts are fully interchangeable. Identical PCB assembly, soldering profiles, and testing procedures apply to both components.