MAX4494AKA-T Equivalent & Substitute Parts

Part Overview

The MAX4494AKA-T is a general purpose operational amplifier featuring dual circuits in a rail-to-rail configuration, manufactured by Analog Devices Inc./Maxim Integrated. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. The MAX4494AKA-T operates across a 4.5V to 11V supply range with a 5 MHz gain bandwidth product and is housed in a SOT-23-8 surface mount package.

Substiute Parts

MAX4494AKA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 990MAX4494AKA-T Datasheet

Current PartRFQ

MAX4494AKA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4461MAX4494AKA+T Datasheet

DirectRFQ

AD8030ARJZ-REEL7

Analog Devices Inc.In Stock: 18505AD8030ARJZ-REEL7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX4494AKA-T is determined by the following critical parameters:

Mechanical Compatibility: Package type (SOT-23-8), mounting method (surface mount), and pin configuration must remain identical to ensure direct board-level replacement without layout modifications.

Functional Equivalence: Dual-circuit general purpose operational amplifier topology with rail-to-rail output capability is required.

Electrical Operating Range: Supply voltage span compatibility (minimum 4.5V, maximum 11V) and operating temperature range (-40°C to 125°C) must be maintained or exceeded.

Performance Characteristics: Slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current per channel define the performance envelope for substitution.

Compliance & Status: RoHS3 compliance, MSL rating, and product status (active vs. obsolete) are considered for long-term availability and regulatory adherence.

Parameter Comparison

Engineering Selection Recommendations

MAX4494AKA+T (Direct Substitute): This part is the direct equivalent to the MAX4494AKA-T, differing only in packaging format (Tape & Reel vs. tube). The MAX4494AKA+T maintains identical electrical specifications, performance characteristics, and operating parameters. Product status is active, ensuring continued availability and supply chain stability. This substitute is recommended for applications requiring exact performance matching with no design modifications.

AD8030ARJZ-REEL7 (Performance-Enhanced Alternative): The AD8030ARJZ-REEL7 is an alternative general purpose dual operational amplifier in SOT-23-8 packaging. This device exhibits enhanced performance characteristics: slew rate of 63V/µs (versus 3V/µs), gain bandwidth product of 125 MHz (versus 5 MHz), and output current capability of 170 mA per channel (versus 15 mA). Supply voltage range is expanded to 2.7V minimum, providing greater flexibility in low-voltage applications. Input bias current and input offset voltage are higher, which may require circuit design consideration in precision applications. Product status is active. This substitute is suitable for applications where improved speed and output drive capability provide system-level benefits and where the relaxed input specifications are acceptable.

Both substitutes maintain SOT-23-8 package compatibility, surface mount mounting, -40°C to 125°C operating temperature range, RoHS3 compliance, and MSL-1 rating.

Frequently Asked Questions (FAQ)

Q: Can MAX4494AKA+T be used as a direct replacement for MAX4494AKA-T?

A: Yes. The MAX4494AKA+T is electrically and functionally identical to the MAX4494AKA-T. The difference is packaging format: MAX4494AKA-T is supplied in tube packaging, while MAX4494AKA+T is supplied in Tape & Reel format. Both are SOT-23-8 surface mount packages with identical pin configurations and electrical specifications. No circuit modifications are required.

Q: What are the key differences between MAX4494AKA-T and AD8030ARJZ-REEL7?

A: Both devices are dual general purpose operational amplifiers in SOT-23-8 packages with rail-to-rail outputs and identical operating temperature ranges. The AD8030ARJZ-REEL7 provides significantly higher performance: 63V/µs slew rate versus 3V/µs, 125 MHz bandwidth versus 5 MHz, and 170 mA output current per channel versus 15 mA. The AD8030ARJZ-REEL7 also operates at lower minimum supply voltage (2.7V versus 4.5V). Input bias current and input offset voltage are higher in the AD8030ARJZ-REEL7, which may affect precision analog circuits.

Q: Is the AD8030ARJZ-REEL7 a pin-for-pin replacement?

A: Yes. The AD8030ARJZ-REEL7 is housed in SOT-23-8 packaging with identical pin configuration to the MAX4494AKA-T. No PCB layout modifications are required for physical replacement. However, circuit performance will differ due to enhanced electrical characteristics.

Q: Why is the MAX4494AKA-T listed as obsolete?

A: The MAX4494AKA-T is classified as obsolete by the manufacturer. The MAX4494AKA+T (active product status) is the current production equivalent. For new designs or long-term supply assurance, the MAX4494AKA+T or AD8030ARJZ-REEL7 should be specified.

Q: Which substitute should I select for a new design?

A: For new designs, the MAX4494AKA+T is recommended if the original MAX4494AKA-T specifications are required. The AD8030ARJZ-REEL7 is recommended if the application benefits from higher speed, greater output current capability, or lower minimum supply voltage operation.

Q: Are all three parts RoHS3 compliant?

A: Yes. The MAX4494AKA-T, MAX4494AKA+T, and AD8030ARJZ-REEL7 are all RoHS3 compliant with MSL-1 (unlimited moisture sensitivity level) rating.