MAX4326ESA-T Equivalent & Substitute Parts Reference

Part Overview

The MAX4326ESA-T is a general purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, featuring dual circuits in an 8-SOIC surface mount package. This device is classified as obsolete, with 1021 pieces currently in stock. The MAX4326ESA-T operates as a rail-to-rail output amplifier suitable for low-voltage applications requiring dual-channel amplification.

Due to its obsolete product status, identifying equivalent and substitute parts is essential for design continuity, long-term supply chain reliability, and new project implementations. Active alternatives with comparable or enhanced electrical characteristics are available from multiple manufacturers including Texas Instruments, Analog Devices, and STMicroelectronics.

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	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MAX4326ESA-T are selected based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Primary Compatibility Criteria:

Dual-circuit configuration (2 circuits required)
Rail-to-rail output capability
8-SOIC surface mount package (0.154", 3.90mm width)
Operating temperature range of -40°C to 85°C minimum
Supply voltage span compatibility (minimum 2.4V to 6.5V or overlapping range)
Output current capability of 50 mA per channel or greater

Substitution Categories:

Category 1: Direct Packaging Equivalent MAX4326ESA+T represents the active production variant of the same base product (MAX4326) with identical electrical specifications but supplied in Tape & Reel packaging format.

Category 2: CMOS Technology Alternatives OPA2343UA/2K5 and AD8602 series parts offer CMOS amplifier architecture with enhanced input bias current characteristics (0.2 pA), higher slew rates (6 V/µs), and improved gain bandwidth products (5.5–8.4 MHz). These parts maintain 8-SOIC packaging and rail-to-rail output configuration.

Category 3: General Purpose Alternatives ADA4692-2ARZ-RL, LMV822IDT, and LMV822IYDT provide general purpose amplification with rail-to-rail output in 8-SOIC packages. These alternatives support extended operating temperature ranges and automotive-grade qualifications where applicable.

All substitute parts maintain electrical parameter compatibility within acceptable engineering tolerances for general purpose amplifier applications.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA/pA)	Input Offset (µV/mV)	Supply Current (µA)	Output Current (mA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	Product Status
MAX4326ESA-T	Analog Devices/Maxim	General Purpose	2	5	50 nA	700 µV	725	50	2.4	6.5	-40 to 85	Obsolete
MAX4326ESA+T	Analog Devices/Maxim	General Purpose	2	5	50 nA	700 µV	725	50	2.4	6.5	-40 to 85	Active
OPA2343UA/2K5	Texas Instruments	CMOS	6	5.5	0.2 pA	2 mV	850	50	2.5	5.5	-40 to 85	Active
AD8602ARZ	Analog Devices	CMOS	6	8.4	0.2 pA	80 µV	750	50	2.7	5.5	-40 to 125	Active
AD8602ARZ-REEL	Analog Devices	CMOS	6	8.4	0.2 pA	80 µV	750	50	2.7	5.5	-40 to 125	Active
AD8602ARZ-REEL7	Analog Devices	CMOS	6	8.4	0.2 pA	80 µV	750	50	2.7	5.5	-40 to 125	Active
AD8602WARZ-R7	Analog Devices	CMOS	6	8.4	0.2 pA	80 µV	750	50	2.7	5.5	-40 to 125	Active
ADA4692-2ARZ-RL	Analog Devices	General Purpose	1.3	3.6	0.5 pA	500 µV	180	55	2.7	5	-40 to 125	Active
LMV822IDT	STMicroelectronics	General Purpose	1.9	5.5	60 nA	3.5 mV	300	70	2.5	5.5	-40 to 125	Active
LMV822IYDT	STMicroelectronics	General Purpose	1.9	5.5	60 nA	3.5 mV	300	70	2.5	5.5	-40 to 125	Active
LMV822M	Texas Instruments	General Purpose	2	5.6	40 nA	1 mV	500	45	2.5	5.5	-40 to 85	Last Time Buy

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): MAX4326ESA+T is the recommended direct substitute. This part maintains identical electrical characteristics and 8-SOIC packaging as the obsolete MAX4326ESA-T, with the distinction of active product status and Tape & Reel packaging availability. Both parts are ROHS3 compliant with MSL 1 rating.

For Enhanced Performance Applications: AD8602 series parts (AD8602ARZ, AD8602ARZ-REEL, AD8602ARZ-REEL7, AD8602WARZ-R7) offer superior electrical performance with higher gain bandwidth product (8.4 MHz), improved slew rate (6 V/µs), and extended operating temperature range (-40°C to 125°C). These CMOS amplifiers feature significantly lower input bias current (0.2 pA) and reduced input offset voltage (80 µV). All variants maintain 8-SOIC packaging and are ROHS3 compliant with MSL 1 rating. Multiple packaging options (Tube, Tape & Reel, Cut Tape & Digi-Reel) support various procurement requirements.

For Low-Power Applications: ADA4692-2ARZ-RL provides the lowest supply current consumption (180 µA for dual channels) among available substitutes, making it suitable for battery-powered or energy-constrained designs. This part maintains general purpose amplifier architecture with extended temperature range (-40°C to 125°C) and is ROHS3 compliant.

For Automotive-Grade Requirements: LMV822IDT and LMV822IYDT are STMicroelectronics parts qualified to AEC-Q100 automotive standards. These devices provide 5.5 MHz gain bandwidth product, 1.9 V/µs slew rate, and extended operating temperature range (-40°C to 125°C). LMV822IDT is supplied in Cut Tape & Digi-Reel packaging, while LMV822IYDT is supplied in Tape & Reel format.

For Legacy System Continuity: LMV822M (Texas Instruments, Last Time Buy status) maintains electrical characteristics closely aligned with MAX4326ESA-T, including 2 V/µs slew rate and 5.6 MHz gain bandwidth product. This part is suitable for designs requiring minimal parameter deviation from the original specification.

All recommended substitutes are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

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

A: Yes. MAX4326ESA+T is the active production equivalent of MAX4326ESA-T with identical electrical specifications, dual-circuit configuration, rail-to-rail output, and 8-SOIC packaging. The primary difference is packaging format (Tape & Reel versus tube) and active product status. Both parts are ROHS3 compliant with MSL 1 rating.

Q2: What are the key differences between general purpose and CMOS amplifier substitutes?

A: General purpose amplifiers (MAX4326, ADA4692-2ARZ-RL, LMV822 series) use bipolar or mixed-signal architecture, while CMOS amplifiers (OPA2343UA/2K5, AD8602 series) offer significantly lower input bias current (0.2 pA versus 40–60 nA) and reduced power consumption in certain configurations. CMOS variants typically provide higher slew rates and gain bandwidth products. Selection depends on application requirements for input impedance, speed, and power consumption.

Q3: Are all substitute parts compatible with the 8-SOIC package footprint?

A: Yes. All listed substitute parts are specified for 8-SOIC (0.154", 3.90mm width) surface mount packages. PCB footprints are mechanically and electrically compatible. Verify pin assignment compatibility with the original MAX4326ESA-T datasheet before implementation.

Q4: What is the significance of product status (Active, Obsolete, Last Time Buy)?

A: Product status indicates supply chain availability and manufacturer support. Active parts have ongoing production and long-term availability. Obsolete parts have ceased production; existing inventory is finite. Last Time Buy indicates final production run with defined cutoff date. For new designs, active parts are recommended. For legacy system support, Last Time Buy parts may be acceptable if inventory is secured.

Q5: Do substitute parts support the full -40°C to 85°C operating temperature range of the MAX4326ESA-T?

A: Most substitutes support this range or exceed it. OPA2343UA/2K5 matches the -40°C to 85°C range exactly. AD8602 series, ADA4692-2ARZ-RL, and LMV822 variants extend to -40°C to 125°C, providing additional thermal margin. LMV822M matches the original -40°C to 85°C specification. Verify application temperature requirements before selection.

Q6: What packaging options are available for high-volume procurement?

A: Tape & Reel (TR) packaging is standard for high-volume surface mount assembly. Available options include: MAX4326ESA+T (TR), AD8602ARZ-REEL (TR), AD8602ARZ-REEL7 (CT & Digi-Reel), LMV822IYDT (TR), and LMV822IDT (CT & Digi-Reel). Cut Tape & Digi-Reel format supports mixed-volume requirements. Tube packaging (AD8602ARZ) is available for lower-volume applications.

Q7: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are specified as ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q8: Which substitute offers the best performance-to-power-consumption ratio?

A: AD8602 series provides the highest gain bandwidth product (8.4 MHz) with moderate supply current (750 µA for dual channels). ADA4692-2ARZ-RL offers the lowest supply current (180 µA) at the cost of reduced slew rate (1.3 V/µs) and gain bandwidth product (3.6 MHz). Selection depends on specific application requirements for speed versus power efficiency.

Q9: Can CMOS amplifiers (OPA2343UA/2K5, AD8602) be substituted in circuits designed for bipolar amplifiers?

A: CMOS amplifiers are generally compatible with bipolar amplifier circuits due to identical pin configuration and rail-to-rail output capability. However, verify input impedance requirements; CMOS amplifiers have significantly higher input impedance (0.2 pA bias current) compared to bipolar types (40–60 nA). This may affect circuit behavior in high-impedance signal paths or transimpedance configurations.

Q10: What is the Moisture Sensitivity Level (MSL) significance for these parts?

A: MSL indicates moisture absorption limits and storage requirements. MSL 1 (unlimited) parts have no moisture sensitivity restrictions and can be stored indefinitely at room temperature. MSL 2 (1 Year) parts require controlled storage conditions. MAX4326ESA-T and most substitutes are MSL 1, except OPA2343UA/2K5 (MSL 2). MSL 1 parts are preferred for long-term inventory and flexible supply chain management.

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