AD8008AR Equivalent & Substitute Parts

Part Overview

The AD8008AR is a current feedback amplifier integrated circuit manufactured by Analog Devices Inc., configured as a dual-channel operational amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, though 4,975 units remain available in new original inventory. The AD8008AR delivers a slew rate of 1000 V/µs and operates across a -3dB bandwidth of 500 MHz, making it suitable for high-speed signal conditioning applications requiring dual amplifier channels.

Due to the obsolete product status of the AD8008AR, identification of equivalent and substitute parts is necessary for design continuity, long-term supply assurance, and new production implementations. Substitute parts must maintain functional compatibility through matching or exceeding key electrical parameters while maintaining the same physical package footprint and pin configuration.

Substiute Parts

AD8008AR

Analog Devices Inc.In Stock: 5003AD8008AR Datasheet

Current PartRFQ

AD8008ARZ

Analog Devices Inc.In Stock: 1680AD8008ARZ Datasheet

DirectRFQ

MAX4225ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1382MAX4225ESA+ Datasheet

SimilarRFQ

OPA2674ID

Texas InstrumentsIn Stock: 2354OPA2674ID Datasheet

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OPA2674IDR

Texas InstrumentsIn Stock: 2228OPA2674IDR Datasheet

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OPA2684ID

Texas InstrumentsIn Stock: 8493OPA2684ID Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8008AR is determined by strict adherence to the following criteria:

Primary Compatibility Requirements:

• Amplifier Type: Current Feedback (mandatory)
• Number of Circuits: 2 (mandatory)
• Package / Case: 8-SOIC with 0.154" (3.90mm) width (mandatory for pin compatibility)
• Mounting Type: Surface Mount (mandatory)
• Operating Temperature Range: -40°C to 85°C (mandatory)
• Voltage Supply Span: Minimum 5 V to Maximum 12 V (mandatory overlap required)

Secondary Performance Parameters (Substitution Basis):

• Slew Rate: 1000 V/µs or greater
• -3dB Bandwidth: 500 MHz or greater
• Current - Input Bias: 4 µA or lower
• Voltage - Input Offset: 500 µV or lower
• Current - Supply: 9 mA per channel or lower
• Current - Output per Channel: 130 mA or greater

Substitute parts are classified into two categories: Direct Equivalents (identical electrical specifications with different packaging or product status) and Functional Equivalents (enhanced or alternative specifications meeting or exceeding all primary requirements).

Parameter Comparison

Engineering Selection Recommendations

AD8008ARZ (Direct Equivalent - Recommended Primary Substitute)

The AD8008ARZ is the active production equivalent of the AD8008AR, manufactured by Analog Devices Inc. This part maintains identical electrical specifications across all key parameters: 1000 V/µs slew rate, 500 MHz -3dB bandwidth, 4 µA input bias current, and 130 mA output current per channel. The primary distinction is product status (Active vs. Obsolete) and packaging format (Tube vs. unspecified). The AD8008ARZ carries ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term supply availability and regulatory conformance. With 1,663 units in stock, this part provides direct functional replacement without circuit redesign.

MAX4225ESA+ (Performance-Enhanced Substitute)

The MAX4225ESA+ offers enhanced performance characteristics while maintaining core compatibility. This part delivers 1100 V/µs slew rate (10% improvement), 1000 MHz -3dB bandwidth (2x improvement), and reduced supply current of 6 mA per channel (33% reduction). Input bias current is improved to 2 µA. However, output current per channel is reduced to 80 mA, which may limit applications requiring higher output drive capability. The minimum supply voltage is 5.7 V, requiring verification against 5 V supply designs. This part is Active status with ROHS3 compliance and 1,314 units available.

OPA2674ID and OPA2674IDR (High-Performance Substitutes)

The OPA2674ID and OPA2674IDR (functionally identical, differing in packaging) are Texas Instruments current feedback amplifiers offering significantly enhanced slew rate (2000 V/µs, 2x improvement) and output current capability (500 mA per channel, 3.85x improvement). These parts maintain the 5 V to 12 V supply range and -40°C to 85°C operating temperature. Trade-offs include higher supply current (18 mA per channel, 2x increase) and higher input offset voltage (1000 µV vs. 500 µV). These parts are suitable for applications requiring maximum output drive capability. Both variants are Active status with ROHS3 compliance. OPA2674ID inventory: 2,248 units; OPA2674IDR inventory: 2,130 units.

OPA2684ID (Differential Output Variant)

The OPA2684ID is a current feedback amplifier with differential output configuration, distinguishing it from the single-ended output of the AD8008AR. This part features exceptional gain bandwidth product (1.9 GHz) and minimal supply current (1.7 mA per channel). However, the differential output topology requires circuit redesign and is not a direct pin-compatible substitute. The minimum supply voltage of 2.8 V extends low-voltage capability. This part is suitable only for new designs requiring differential output architecture. Active status with ROHS3 compliance and 8,400 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the AD8008ARZ be used as a direct replacement for the AD8008AR without circuit modification?

A: Yes. The AD8008ARZ maintains identical electrical specifications and pin configuration. The only differences are product status (Active vs. Obsolete) and packaging format (Tube). No circuit redesign is required.

Q: What is the primary reason to substitute the AD8008AR?

A: The AD8008AR is classified as obsolete. Substitution ensures long-term supply availability and compliance with current manufacturing standards. The AD8008ARZ provides the most direct path for design continuity.

Q: Can the MAX4225ESA+ be used in applications designed for the AD8008AR?

A: The MAX4225ESA+ is compatible with most AD8008AR applications due to enhanced performance specifications. However, the reduced output current per channel (80 mA vs. 130 mA) and higher minimum supply voltage (5.7 V vs. 5 V) require verification against specific circuit requirements. Applications operating at 5 V supply or requiring 130 mA output current are not suitable for this substitute.

Q: What are the key differences between OPA2674ID and OPA2674IDR?

A: The OPA2674ID and OPA2674IDR are functionally identical current feedback amplifiers. The primary difference is packaging designation. Both maintain identical electrical performance and are suitable for the same applications.

Q: Is the OPA2684ID a suitable substitute for the AD8008AR?

A: The OPA2684ID is not a direct substitute due to differential output configuration. The AD8008AR features single-ended output, while the OPA2684ID provides differential output. This architectural difference requires circuit redesign and is not recommended for direct replacement applications.

Q: What supply voltage range must be verified when selecting a substitute?

A: The AD8008AR operates across 5 V to 12 V supply range. Substitute parts must support this range or a compatible subset. The MAX4225ESA+ minimum supply voltage is 5.7 V, requiring verification for 5 V applications. The OPA2684ID supports 2.8 V to 12 V, extending low-voltage capability.

Q: Are all substitute parts RoHS compliant?

A: The AD8008ARZ, MAX4225ESA+, OPA2674ID, OPA2674IDR, and OPA2684ID are all ROHS3 compliant. The original AD8008AR does not specify RoHS status.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (0.154", 3.90mm width) package is mandatory for pin-compatible substitution. All listed substitute parts maintain this package specification, ensuring direct PCB footprint compatibility without layout modification.

Q: Which substitute part offers the lowest power consumption?

A: The OPA2684ID offers the lowest supply current at 1.7 mA per channel, representing a 81% reduction compared to the AD8008AR. However, this part features differential output and is not a direct substitute.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: No. Each substitute part has distinct electrical characteristics. Once a substitute is selected and validated for a specific application, that part number must be maintained throughout production. Interchanging substitute parts without re-validation may result in circuit performance degradation or failure.