MAX4326ESA Equivalent & Substitute Parts Reference

Part Overview

The MAX4326ESA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, configured as a dual-channel (2 circuit) rail-to-rail amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, with 9,100 units currently in stock.

Due to its obsolete product status, identifying equivalent and substitute parts is essential for design continuity, production planning, and long-term component availability. Substitute parts must maintain functional compatibility across critical electrical parameters including supply voltage range, output type, gain bandwidth product, and package configuration.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	2	V/µs
Gain Bandwidth Product	5	MHz
Current - Input Bias	50	nA
Voltage - Input Offset	700	µV
Current - Supply (x2 Channels)	725	µA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	2.4	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	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MAX4326ESA are selected based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

Critical Matching Parameters:

Number of Circuits: 2 (dual-channel configuration)
Output Type: Rail-to-Rail
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Current - Output / Channel: 50 mA (minimum)
Operating Temperature Range: Must encompass -40°C to 85°C

Allowable Parameter Variations:

Slew Rate: Equal to or greater than 2 V/µs
Gain Bandwidth Product: Equal to or greater than 5 MHz
Current - Input Bias: Equal to or less than 50 nA (lower is acceptable)
Voltage - Input Offset: Equal to or less than 700 µV (lower is acceptable)
Current - Supply: May vary within functional limits
Voltage - Supply Span: May exceed the original range (2.4 V to 6.5 V minimum)

Substitute parts are organized into the following categories:

Direct Packaging Variant (MAX4326ESA+): Identical electrical specifications with updated packaging and active product status.
Alternative Package Configurations (OPA2343EA/250, OPA2343UA): Different package types (8-VSSOP, 8-SOIC) with enhanced electrical performance.
Manufacturer-Recommended Alternatives (AD8602 series, LMV822 series): Active products with superior specifications and extended temperature ranges.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	Package	Product Status	RoHS
MAX4326ESA	Analog Devices/Maxim	General Purpose	2	5	50	700	725	50	2.4	6.5	-40 to 85	8-SOIC	Obsolete	Non-compliant
MAX4326ESA+	Analog Devices/Maxim	General Purpose	2	5	50	700	725	50	2.4	6.5	-40 to 85	8-SOIC	Active	ROHS3 Compliant
OPA2343EA/250	Texas Instruments	CMOS	6	5.5	0.2	2000	850	50	2.5	5.5	-40 to 85	8-VSSOP	Active	ROHS3 Compliant
OPA2343UA	Texas Instruments	CMOS	6	5.5	0.2	2000	850	50	2.5	5.5	-40 to 85	8-SOIC	Active	ROHS3 Compliant
AD8602ARZ	Analog Devices	CMOS	6	8.4	0.2	80	750	50	2.7	5.5	-40 to 125	8-SOIC	Active	ROHS3 Compliant
AD8602ARZ-REEL	Analog Devices	CMOS	6	8.4	0.2	80	750	50	2.7	5.5	-40 to 125	8-SOIC	Active	ROHS3 Compliant
AD8602ARZ-REEL7	Analog Devices	CMOS	6	8.4	0.2	80	750	50	2.7	5.5	-40 to 125	8-SOIC	Active	ROHS3 Compliant
AD8602WARZ-R7	Analog Devices	CMOS	6	8.4	0.2	80	750	50	2.7	5.5	-40 to 125	8-SOIC	Active	ROHS3 Compliant
LMV822IDT	STMicroelectronics	General Purpose	1.9	5.5	60	3500	300	70	2.5	5.5	-40 to 125	8-SOIC	Active	ROHS3 Compliant
LMV822IYDT	STMicroelectronics	General Purpose	1.9	5.5	60	3500	300	70	2.5	5.5	-40 to 125	8-SOIC	Active	ROHS3 Compliant
LMV822M	Texas Instruments	General Purpose	2	5.6	40	1000	500	45	2.5	5.5	-40 to 85	8-SOIC	Last Time Buy	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1: Direct Replacement (Identical Electrical Specifications)

MAX4326ESA+ is the direct successor to MAX4326ESA, offering identical electrical performance with active product status and ROHS3 compliance. This part is recommended for applications requiring no design modification. Inventory availability is 12,700 units.

Tier 2: Pin-Compatible Alternatives (8-SOIC Package)

The following parts maintain 8-SOIC package compatibility and meet or exceed electrical specifications:

AD8602ARZ series (AD8602ARZ, AD8602ARZ-REEL, AD8602ARZ-REEL7, AD8602WARZ-R7): CMOS amplifiers with extended temperature range (-40°C to 125°C), superior gain bandwidth product (8.4 MHz), and lower input offset voltage (80 µV). These parts are actively manufactured with ROHS3 compliance and MSL 1 rating. Total combined inventory exceeds 30,000 units.
LMV822M (Texas Instruments): General-purpose amplifier with slew rate matching the original specification (2 V/µs) and extended temperature range. Product status is Last Time Buy with ROHS3 compliance.
LMV822IDT and LMV822IYDT (STMicroelectronics): General-purpose amplifiers with automotive-grade qualification (AEC-Q100) and extended temperature range (-40°C to 125°C). These parts feature lower supply current (300 µA) and higher output current capability (70 mA). Both are actively manufactured with ROHS3 compliance.

Tier 3: Alternative Package Configurations (Functional Equivalents)

OPA2343UA (Texas Instruments): 8-SOIC package with CMOS architecture, enhanced slew rate (6 V/µs), and superior gain bandwidth product (5.5 MHz). Inventory: 1,475 units.
OPA2343EA/250 (Texas Instruments): 8-VSSOP package variant of OPA2343 series. Requires PCB layout modification due to different package footprint. Inventory: 1,550 units.

Compliance and Certification Considerations:

All recommended substitute parts carry ROHS3 compliance, addressing the non-compliant status of the original MAX4326ESA. Parts designated as automotive-grade (LMV822IDT, LMV822IYDT) include AEC-Q100 qualification, suitable for automotive applications. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q1: Can MAX4326ESA+ be used as a direct drop-in replacement for MAX4326ESA?

A: Yes. MAX4326ESA+ is electrically and mechanically identical to MAX4326ESA, with the same pin configuration, package dimensions (8-SOIC, 0.154" width), and electrical specifications. The primary differences are active product status and ROHS3 compliance. No design modification is required.

Q2: What are the key differences between the AD8602 series and the original MAX4326ESA?

A: The AD8602 series offers superior performance: gain bandwidth product of 8.4 MHz (versus 5 MHz), input offset voltage of 80 µV (versus 700 µV), and extended operating temperature range to 125°C (versus 85°C). All AD8602 variants maintain 8-SOIC package compatibility and 50 mA output current per channel. Supply current is slightly lower at 750 µA.

Q3: Are there any package compatibility issues when substituting with OPA2343 series?

A: OPA2343UA maintains 8-SOIC package compatibility with identical footprint and pin count. OPA2343EA/250 uses an 8-VSSOP package (0.118" width versus 0.154"), requiring PCB layout modification. Both OPA2343 variants are functionally equivalent but introduce different thermal and mechanical characteristics.

Q4: What is the significance of the LMV822 automotive qualification?

A: LMV822IDT and LMV822IYDT carry AEC-Q100 automotive-grade qualification, indicating compliance with automotive reliability and environmental standards. These parts are suitable for automotive applications requiring enhanced temperature stability and quality assurance. Non-automotive applications may use any substitute listed.

Q5: How do supply voltage ranges compare across substitute parts?

A: The original MAX4326ESA operates from 2.4 V to 6.5 V. Most substitutes operate from 2.5 V to 5.5 V, representing a narrower maximum supply voltage. For applications requiring 6.5 V operation, MAX4326ESA+ is the only substitute maintaining the original specification. For standard 5 V or lower supply applications, all listed substitutes are compatible.

Q6: Which substitute offers the lowest power consumption?

A: LMV822IDT and LMV822IYDT feature the lowest supply current at 300 µA (x2 channels), compared to 725 µA for MAX4326ESA. This represents a 59% reduction in supply current, beneficial for battery-powered or power-constrained applications.

Q7: What is the difference between AD8602ARZ packaging variants (standard, -REEL, -REEL7, WARZ-R7)?

A: All AD8602ARZ variants are electrically identical with identical 8-SOIC package specifications. Packaging differences relate to tape and reel configurations: standard tube packaging, standard tape & reel, Digi-Reel® format, and wide-temperature Digi-Reel® format. Selection depends on procurement and assembly requirements, not electrical performance.

Q8: Can MAX4326ESA be substituted in high-temperature applications?

A: The original MAX4326ESA operates only to 85°C. For applications requiring extended temperature operation to 125°C, use AD8602 series, LMV822IDT, LMV822IYDT, or OPA2343 series. These parts maintain full electrical specifications across the extended temperature range.

Q9: What is the MSL (Moisture Sensitivity Level) significance for these parts?

A: MAX4326ESA and all AD8602 variants carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions and indefinite shelf life. OPA2343 series carries MSL 2 (1 Year), requiring controlled storage conditions and bake-out procedures before reflow soldering. LMV822 series carries MSL 1 (Unlimited).

Q10: Are all substitute parts RoHS compliant?

A: The original MAX4326ESA is RoHS non-compliant. All listed substitutes are ROHS3 compliant, meeting current environmental regulations. This compliance upgrade is mandatory for new designs and recommended for legacy design updates.

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