MAX4286ESA Equivalent & Substitute Parts

Part Overview

The MAX4286ESA is a buffer amplifier integrated circuit manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This device is classified as obsolete, indicating discontinued production and limited availability for new designs. The MAX4286ESA provides single-circuit buffer amplification with a slew rate of 385 V/µs and -3dB bandwidth of 130 MHz, designed for applications requiring high-speed signal buffering in compact form factors.

Due to its obsolete status, sourcing new units for production or replacement applications requires identification of functionally compatible alternatives. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Buffer	—
Number of Circuits	1	—
Slew Rate	385	V/µs
-3dB Bandwidth	130	MHz
Current - Input Bias	13	µA
Voltage - Input Offset	100	µV
Current - Supply	23	mA
Current - Output / Channel	106	mA
Voltage - Supply Span (Min)	2.85	V
Voltage - Supply Span (Max)	6.5	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MAX4286ESA is determined by compatibility across the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct board-level compatibility without layout modifications.

Electrical Performance Envelope: Substitute parts must operate within the supply voltage range of 2.85 V to 6.5 V minimum and accommodate the operating temperature range of -40°C to 85°C. The substitute amplifier type may differ (buffer versus voltage feedback) provided the functional output characteristics remain compatible with the application circuit.

Circuit Count: Single-circuit configuration is required to match the original device topology.

Bandwidth and Slew Rate: Substitute parts must meet or exceed the -3dB bandwidth of 130 MHz and slew rate of 385 V/µs to ensure signal fidelity in high-speed applications.

Input and Output Characteristics: Input bias current, input offset voltage, and output current specifications must fall within acceptable ranges for the target application. Substitute parts with lower input bias current and improved offset voltage specifications provide enhanced performance margins.

The AD8038ARZ, AD8038ARZ-REEL, and AD8038ARZ-REEL7 variants satisfy these substitution criteria. All three are voltage feedback amplifiers in active production status, offering superior electrical performance compared to the obsolete MAX4286ESA while maintaining package and pin compatibility.

Parameter Comparison

Parameter	MAX4286ESA	AD8038ARZ	AD8038ARZ-REEL	AD8038ARZ-REEL7	Unit
Amplifier Type	Buffer	Voltage Feedback	Voltage Feedback	Voltage Feedback	—
Number of Circuits	1	1	1	1	—
Slew Rate	385	425	425	425	V/µs
-3dB Bandwidth	130	350	350	350	MHz
Current - Input Bias	13	0.4	0.4	0.4	µA
Voltage - Input Offset	100	500	500	500	µV
Current - Supply	23	1	1	1	mA
Voltage - Supply Span (Min)	2.85	3	3	3	V
Voltage - Supply Span (Max)	6.5	12	12	12	V
Operating Temperature	-40 to 85	-40 to 85	-40 to 85	-40 to 85	°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	—
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	—
Product Status	Obsolete	Active	Active	Active	—
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

Primary Selection: AD8038ARZ-REEL7

The AD8038ARZ-REEL7 is the recommended substitute for new designs and production applications. This variant offers the highest inventory availability (7,486 pieces in stock), active product status ensuring long-term supply continuity, and ROHS3 compliance meeting current environmental and regulatory standards. The tape and reel packaging format supports automated assembly processes. Electrical performance exceeds the MAX4286ESA across all critical parameters: slew rate increases from 385 V/µs to 425 V/µs, bandwidth extends from 130 MHz to 350 MHz, and supply current reduces from 23 mA to 1 mA, providing improved power efficiency.

Secondary Selection: AD8038ARZ-REEL

The AD8038ARZ-REEL provides identical electrical specifications to the AD8038ARZ-REEL7 with 2,400 pieces available inventory. This variant accommodates applications requiring reel packaging without the TR (Tape & Reel) designation. ROHS3 compliance and active product status apply.

Tertiary Selection: AD8038ARZ

The AD8038ARZ is available in tube packaging (1,430 pieces in stock) and serves applications with lower volume requirements or manual assembly processes. Electrical performance and compliance specifications match the reel variants.

All three AD8038 variants maintain the 8-SOIC package footprint, enabling direct board-level substitution without PCB redesign. The expanded supply voltage range (3 V to 12 V versus 2.85 V to 6.5 V) provides additional design flexibility for multi-supply systems.

Frequently Asked Questions (FAQ)

Q: Can the AD8038ARZ directly replace the MAX4286ESA on existing PCBs?

A: Yes. Both devices use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pin assignments. No PCB layout modifications are required for direct substitution.

Q: What are the key electrical differences between the MAX4286ESA and AD8038ARZ variants?

A: The AD8038 series provides superior performance: bandwidth increases from 130 MHz to 350 MHz, slew rate improves from 385 V/µs to 425 V/µs, input bias current decreases from 13 µA to 0.4 µA, and supply current reduces from 23 mA to 1 mA. The supply voltage range expands from 2.85–6.5 V to 3–12 V. These improvements enhance signal integrity and reduce power consumption.

Q: Why do the AD8038ARZ variants have different packaging designations?

A: AD8038ARZ is supplied in tube packaging for manual or low-volume assembly. AD8038ARZ-REEL and AD8038ARZ-REEL7 are supplied on reels; the REEL7 designation indicates a specific reel configuration. All three variants contain identical die and electrical specifications. Selection depends on assembly process requirements and volume.

Q: Is the AD8038ARZ compliant with current environmental regulations?

A: Yes. All AD8038ARZ variants are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance restrictions. The MAX4286ESA is RoHS non-compliant, making the AD8038 series necessary for applications subject to RoHS requirements.

Q: What is the minimum supply voltage for the AD8038ARZ?

A: The AD8038ARZ minimum supply voltage is 3 V, compared to 2.85 V for the MAX4286ESA. Applications operating below 3 V require verification that the AD8038 meets performance specifications at the intended supply level.

Q: Can the AD8038ARZ be used in applications designed for the MAX4286ESA without circuit modifications?

A: Direct substitution is possible for most applications due to package and pin compatibility. However, the improved electrical performance of the AD8038 (higher bandwidth, lower input bias current, reduced supply current) may require verification that the application circuit does not depend on the specific characteristics of the MAX4286ESA. Circuit simulation or prototype testing is recommended for critical applications.

Q: What inventory status should be considered for long-term supply planning?

A: The MAX4286ESA is obsolete with 969 pieces available. The AD8038ARZ-REEL7 offers the highest inventory (7,486 pieces), followed by AD8038ARZ-REEL (2,400 pieces) and AD8038ARZ (1,430 pieces). For production programs requiring sustained supply, the AD8038ARZ-REEL7 provides the best long-term availability and active product status.

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