AD8574AR Equivalent & Substitute Parts

Part Overview

The AD8574AR is a zero-drift operational amplifier manufactured by Analog Devices Inc., featuring four independent circuits in a 14-SOIC surface mount package. This device is classified as obsolete, indicating discontinued production and limited availability. The AD8574AR delivers rail-to-rail output capability with minimal input offset voltage (1 µV) and extremely low input bias current (1 nA), making it suitable for precision analog signal conditioning applications requiring low drift characteristics.

Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

AD8574AR

Analog Devices Inc.In Stock: 2272AD8574AR Datasheet

Current PartRFQ

AD8574ARZ

Analog Devices Inc.In Stock: 1376AD8574ARZ Datasheet

DirectRFQ

ADA4522-4ARZ

Analog Devices Inc.In Stock: 2866ADA4522-4ARZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AD8574AR are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Primary Compatibility Criteria:

• Amplifier Type: Zero-Drift
• Number of Circuits: 4
• Output Type: Rail-to-Rail
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C to 125°C

Secondary Compatibility Criteria:

• Supply voltage range compatibility
• Input bias current and input offset voltage specifications
• Output current per channel capability
• Slew rate and gain bandwidth product performance

Substitute parts are grouped into two categories:

Direct Equivalent: Parts with identical electrical specifications across all key parameters, differing only in packaging format or product status.

Similar Equivalent: Parts with the same package, circuit count, and amplifier type but with enhanced electrical performance characteristics that maintain backward compatibility within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

AD8574ARZ (Direct Equivalent):

The AD8574ARZ is the direct functional equivalent of the AD8574AR, maintaining identical electrical specifications across all measured parameters. The primary distinction is product status: AD8574ARZ is actively manufactured and supported by Analog Devices Inc., whereas AD8574AR is obsolete. AD8574ARZ is packaged in tube format and carries RoHS3 compliance certification. This part is the preferred replacement for AD8574AR in new designs and production applications requiring component continuity.

ADA4522-4ARZ (Similar Equivalent):

The ADA4522-4ARZ is a functionally similar zero-drift operational amplifier with enhanced performance characteristics. This device maintains the same package footprint (14-SOIC) and circuit configuration (4 independent amplifiers) as the AD8574AR, ensuring mechanical and pinout compatibility. The ADA4522-4ARZ exhibits superior electrical performance: increased slew rate (1.7 V/µs versus 0.4 V/µs), higher gain bandwidth product (2.7 MHz versus 1.5 MHz), and lower input bias current (50 pA versus 1 nA). However, the ADA4522-4ARZ requires a minimum supply voltage of 4.5 V, compared to 2.7 V for the AD8574AR. This part is actively manufactured and carries RoHS3 compliance certification. Selection of ADA4522-4ARZ is appropriate for applications where the higher minimum supply voltage is acceptable and where enhanced bandwidth and slew rate performance provide system benefits.

Both substitute parts are manufactured by Analog Devices Inc. and carry identical moisture sensitivity levels (MSL 1 - Unlimited) and regulatory classifications (ECCN EAR99, HTSUS 8542.33.0001).

Frequently Asked Questions (FAQ)

Q: Can AD8574ARZ be used as a direct replacement for AD8574AR?

A: Yes. AD8574ARZ is electrically and mechanically identical to AD8574AR. Both devices feature identical slew rate (0.4 V/µs), gain bandwidth product (1.5 MHz), input offset voltage (1 µV), input bias current (1 nA), supply voltage range (2.7 V to 5 V), and output current per channel (30 mA). The primary difference is product status: AD8574ARZ is actively manufactured, whereas AD8574AR is obsolete. AD8574ARZ is the recommended replacement for new production.

Q: What are the key differences between AD8574ARZ and ADA4522-4ARZ?

A: Both devices are zero-drift operational amplifiers with four circuits in 14-SOIC packages. The ADA4522-4ARZ offers enhanced performance: slew rate of 1.7 V/µs (versus 0.4 V/µs), gain bandwidth product of 2.7 MHz (versus 1.5 MHz), and input bias current of 50 pA (versus 1 nA). However, ADA4522-4ARZ requires a minimum supply voltage of 4.5 V, whereas AD8574ARZ operates from 2.7 V. Selection depends on supply voltage availability and required bandwidth performance.

Q: Is the 14-SOIC package identical across all three parts?

A: Yes. All three parts—AD8574AR, AD8574ARZ, and ADA4522-4ARZ—use the 14-SOIC package with 0.154" width (3.90mm). This ensures identical PCB footprint and mechanical compatibility. No layout modifications are required when substituting between these parts.

Q: Are there supply voltage compatibility concerns when substituting ADA4522-4ARZ?

A: Yes. The ADA4522-4ARZ requires a minimum supply voltage of 4.5 V, whereas AD8574AR and AD8574ARZ operate from 2.7 V minimum. If your application uses supply voltages between 2.7 V and 4.5 V, ADA4522-4ARZ is not compatible. Verify your system supply voltage before selecting ADA4522-4ARZ as a substitute.

Q: Do all three parts have the same operating temperature range?

A: Yes. AD8574AR, AD8574ARZ, and ADA4522-4ARZ all operate across the temperature range of -40°C to 125°C. No thermal performance differences exist between these parts.

Q: What compliance certifications apply to the substitute parts?

A: Both AD8574ARZ and ADA4522-4ARZ carry RoHS3 compliance and REACH Unaffected status. Both are classified as ECCN EAR99 and HTSUS 8542.33.0001. Moisture sensitivity level is MSL 1 (Unlimited) for all parts, indicating no moisture sensitivity precautions are required during storage or handling.

Q: Can I use ADA4522-4ARZ in a low-voltage application requiring 3.3 V supply?

A: No. ADA4522-4ARZ requires a minimum supply voltage of 4.5 V and cannot operate at 3.3 V. For 3.3 V applications, use AD8574ARZ, which operates from 2.7 V minimum.