AD8055AR Equivalent & Substitute Parts

Part Overview

The AD8055AR is a voltage feedback amplifier manufactured by Analog Devices Inc., configured as a single-circuit 8-SOIC surface mount device. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The AD8055AR delivers a slew rate of 1400V/µs with a -3dB bandwidth of 300 MHz, suitable for high-speed signal conditioning applications. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer comparable performance within defined parameter tolerances.

Substiute Parts

AD8055AR

Analog Devices Inc.In Stock: 9613AD8055AR Datasheet

Current PartRFQ

AD8055ARZ

Analog Devices Inc.In Stock: 2348AD8055ARZ Datasheet

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OPA820ID

Burr BrownIn Stock: 1442OPA820ID Datasheet

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OPA820IDG4

Texas InstrumentsIn Stock: 951OPA820IDG4 Datasheet

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OPA820IDR

Texas InstrumentsIn Stock: 6093OPA820IDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8055AR is determined by electrical and mechanical compatibility across defined parameter categories. The primary substitution logic is structured as follows:

Direct Equivalent (Identical Specifications): The AD8055ARZ maintains all electrical characteristics of the AD8055AR, including slew rate (1400V/µs), -3dB bandwidth (300 MHz), input bias current (400 nA), input offset voltage (3 mV), supply current (5.4mA), output current (60 mA), and supply voltage range (8V to 12V). Both devices operate across the temperature range of -40°C to 125°C and are packaged in 8-SOIC form factor. The AD8055ARZ differs only in product status (active versus obsolete) and packaging format (tube versus unspecified).

Functional Substitutes (Comparable Performance with Parameter Variations): The OPA820ID, OPA820IDG4, and OPA820IDR represent functional substitutes manufactured by Burr Brown and Texas Instruments. These devices share the voltage feedback amplifier topology, single-circuit configuration, and 8-SOIC package geometry. However, these substitutes exhibit different electrical performance characteristics: slew rate of 240V/µs (versus 1400V/µs), -3dB bandwidth of 800 MHz (versus 300 MHz), input bias current of 9 µA (versus 400 nA), and input offset voltage of 200 µV (versus 3 mV). The OPA820 series supports a reduced minimum supply voltage of 5V (versus 8V) and operates to a maximum temperature of 85°C (versus 125°C).

Key Parameters Determining Substitution: Slew rate, -3dB bandwidth, input bias current, input offset voltage, supply voltage range, operating temperature range, and 8-SOIC package compatibility.

Parameter Comparison

Engineering Selection Recommendations

AD8055ARZ Selection: The AD8055ARZ is the primary equivalent for the obsolete AD8055AR. This part maintains identical electrical specifications across all measured parameters and operates within the same temperature range (-40°C to 125°C). The AD8055ARZ carries active product status, ensuring continued availability and manufacturing support. This device is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Selection of AD8055ARZ is appropriate for direct replacement in existing designs without circuit modification.

OPA820 Series Selection (OPA820ID, OPA820IDG4, OPA820IDR): The OPA820 series devices represent functional alternatives when design specifications permit parameter variations. These parts are suitable for applications where the reduced slew rate (240V/µs versus 1400V/µs) and extended -3dB bandwidth (800 MHz versus 300 MHz) are compatible with system requirements. The OPA820 series supports lower minimum supply voltage (5V versus 8V), expanding operational flexibility in power-constrained applications. However, the maximum operating temperature of 85°C (versus 125°C) restricts use in high-temperature environments. All OPA820 variants are ROHS3 compliant and REACH unaffected.

OPA820IDR Availability: Among the OPA820 series, the OPA820IDR maintains active product status with the highest inventory level (6062 units), packaged in cut tape and Digi-Reel format suitable for automated assembly. The OPA820IDG4 is discontinued at DiGi Electronics, limiting long-term procurement viability. The OPA820ID status is listed as active with moderate inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the AD8055ARZ directly replace the AD8055AR without circuit modification?

A: Yes. The AD8055ARZ maintains identical electrical and thermal specifications to the AD8055AR. Both devices operate across -40°C to 125°C, deliver 1400V/µs slew rate, provide 300 MHz -3dB bandwidth, and are packaged in 8-SOIC form factor. Direct substitution is supported without design changes.

Q: What are the primary differences between the AD8055AR and OPA820 series devices?

A: The AD8055AR and OPA820 series differ in slew rate (1400V/µs versus 240V/µs), -3dB bandwidth (300 MHz versus 800 MHz), input bias current (400 nA versus 9 µA), input offset voltage (3 mV versus 200 µV), and maximum operating temperature (125°C versus 85°C). The OPA820 series supports lower minimum supply voltage (5V versus 8V). These differences require circuit evaluation before substitution.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. All listed substitute parts—AD8055ARZ, OPA820ID, OPA820IDG4, and OPA820IDR—are packaged in 8-SOIC (0.154", 3.90mm width) form factor with surface mount mounting type. PCB layout compatibility is maintained across all devices.

Q: Which OPA820 variant should be selected for new designs?

A: The OPA820IDR is recommended for new designs. This device maintains active product status, offers the highest inventory availability (6062 units), and is packaged in cut tape and Digi-Reel format compatible with automated assembly processes. The OPA820IDG4 is discontinued at DiGi Electronics and should not be selected for new production.

Q: What compliance certifications apply to substitute parts?

A: The AD8055ARZ, OPA820ID, OPA820IDG4, and OPA820IDR are all ROHS3 compliant and REACH unaffected. All devices carry EAR99 export classification and HTSUS code 8542.33.0001.

Q: Can OPA820 devices operate in applications requiring temperatures above 85°C?

A: No. The OPA820 series maximum operating temperature is 85°C, limiting use in high-temperature applications. The AD8055AR and AD8055ARZ support operation to 125°C. Applications requiring extended temperature range must retain the AD8055AR or select AD8055ARZ.

Q: What is the moisture sensitivity level for each substitute part?

A: The AD8055AR and AD8055ARZ carry MSL 1 (unlimited moisture sensitivity level). The OPA820ID, OPA820IDG4, and OPA820IDR carry MSL 2 (1 year), requiring controlled storage and handling conditions during manufacturing.