AD820AR Equivalent & Substitute Parts

Part Overview

The AD820AR is a J-FET input operational amplifier manufactured by Analog Devices Inc., designed for rail-to-rail output applications in 8-SOIC surface mount packaging. This device features low input bias current and operates across a wide supply voltage range from 5V to 36V. The AD820AR is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

AD820AR

Analog Devices Inc.In Stock: 4630AD820AR Datasheet

Current PartRFQ

AD820ARZ

Analog Devices Inc.In Stock: 5133AD820ARZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD820AR is determined by strict equivalence across all electrical and mechanical parameters. The primary substitution criterion is functional compatibility, which requires matching specifications in amplifier topology, circuit count, output configuration, frequency response, bias characteristics, supply voltage range, and thermal operating limits. Additionally, the package form factor and mounting technology must be identical to ensure direct board-level replacement without design modification.

The AD820AR qualifies for substitution with parts that maintain:

• J-FET amplifier topology with single circuit configuration
• Rail-to-rail output capability
• Identical slew rate (3 V/µs) and gain bandwidth product (1.8 MHz)
• Matching input bias current (2 pA) and input offset voltage (400 µV)
• Identical supply current (700 µA) and output current capability (20 mA)
• Supply voltage range spanning 5V to 36V minimum and maximum
• Operating temperature range of -40°C to 85°C
• 8-SOIC surface mount package with 3.90mm width
• Moisture sensitivity level 1 classification

Parameter Comparison

Engineering Selection Recommendations

The AD820ARZ serves as the direct functional equivalent to the AD820AR. All electrical parameters, thermal specifications, and mechanical package dimensions are identical between the two parts. The primary distinction is product lifecycle status: the AD820AR is classified as obsolete, while the AD820ARZ maintains active product status.

The AD820ARZ is ROHS3 compliant and REACH unaffected, providing regulatory compliance for new designs and procurement. The identical electrical and mechanical specifications ensure pin-for-pin compatibility and direct substitution capability without circuit redesign or board layout modification.

For applications currently using the AD820AR, transition to the AD820ARZ is supported by complete parameter equivalence. The tube packaging of the AD820ARZ differs from the unspecified packaging of the AD820AR; however, this represents a procurement and handling difference rather than a functional or electrical distinction.

Frequently Asked Questions (FAQ)

Q: Can the AD820ARZ directly replace the AD820AR in existing designs?

A: Yes. The AD820ARZ is electrically and mechanically identical to the AD820AR. All electrical parameters, including slew rate, gain bandwidth product, input bias current, supply voltage range, and output current capability, are matched. The 8-SOIC package dimensions are identical, enabling direct board-level substitution without design modification.

Q: What is the primary reason to transition from AD820AR to AD820ARZ?

A: The AD820AR is classified as obsolete, creating long-term procurement risk. The AD820ARZ maintains active product status from Analog Devices Inc., ensuring continued availability and supply chain stability. The transition carries no technical penalty, as all specifications are equivalent.

Q: Are there packaging differences between AD820AR and AD820ARZ?

A: The AD820ARZ is supplied in tube packaging, while the AD820AR packaging is not specified in available documentation. Both parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package form factor. Packaging differences affect handling and storage procedures but do not impact electrical performance or board-level compatibility.

Q: Does the AD820ARZ meet current regulatory requirements?

A: Yes. The AD820ARZ is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components. The AD820AR regulatory status is not specified in available documentation.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by matching J-FET amplifier topology, single circuit configuration, rail-to-rail output, slew rate of 3 V/µs, gain bandwidth product of 1.8 MHz, input bias current of 2 pA, input offset voltage of 400 µV, supply current of 700 µA, output current of 20 mA per channel, supply voltage range of 5V to 36V, and operating temperature range of -40°C to 85°C. The 8-SOIC package and surface mount technology must also match.

Q: Is the AD820ARZ suitable for applications requiring -40°C to 85°C operation?

A: Yes. The AD820ARZ operates across the full temperature range of -40°C to 85°C, matching the AD820AR specification. This range is maintained across all electrical parameters without derating.

Q: What is the moisture sensitivity classification for the AD820ARZ?

A: The AD820ARZ carries Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions. Storage and handling do not require special humidity control measures.