MAX4322ESA Equivalent & Substitute Parts

Part Overview

The MAX4322ESA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This device features rail-to-rail output capability and is designed for single-circuit amplification applications. The MAX4322ESA is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional compatibility through matching electrical characteristics and identical package specifications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
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	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	—

Substitute Part Grouping Explanation

Substitution of the MAX4322ESA is determined by strict adherence to the following criteria:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Secondary Electrical Compatibility Parameters:

Slew Rate: 2 V/µs or greater
Gain Bandwidth Product: 5 MHz or greater
Voltage - Input Offset: 700 µV or less
Current - Supply: 725 µA or less
Current - Output / Channel: 50 mA or greater
Voltage - Supply Span (Min): 2.4 V or less
Voltage - Supply Span (Max): 6.5 V or greater
Operating Temperature Range: Must include -40°C to 85°C minimum

Substitute parts are grouped by their ability to meet these parameters within the specified tolerances. Parts that exceed supply current or fall below output current capability are listed as alternatives for applications with different power or drive requirements.

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Product Status
MAX4322ESA	Analog Devices	2.0	5	50	700	725	50	2.4	6.5	-40 to 85	Obsolete
MAX4322ESA+	Analog Devices	2.0	5	50	700	725	—	2.4	6.5	-40 to 85	Active
MCP601-E/SN	Microchip	2.3	2.8	0.001	700	230	22	2.7	6.0	-40 to 125	Active
MCP603T-I/SN	Microchip	2.3	2.8	0.001	700	230	22	2.7	6.0	-40 to 85	Active
MCP6281-E/SN	Microchip	2.5	5	0.001	3000	450	25	2.2	6.0	-40 to 125	Active
MCP6281T-E/SN	Microchip	2.5	5	0.001	3000	450	25	2.2	6.0	-40 to 125	Active
MCP6283-E/SN	Microchip	2.5	5	0.001	3000	450	25	2.2	6.0	-40 to 125	Active
MCP6283T-E/SN	Microchip	2.5	5	0.001	3000	450	25	2.2	6.0	-40 to 125	Active
OPA317ID	Texas Instruments	0.15	0.3	0.275	20	21	—	1.8	5.5	-40 to 125	Active
OPA317IDR	Texas Instruments	0.15	0.3	0.275	20	21	—	1.8	5.5	-40 to 125	Active
OPA343UA	Burr Brown	6.0	5.5	0.0002	2000	850	50	2.5	5.5	-40 to 85	Active

Engineering Selection Recommendations

Direct Replacement (Active Product Status):

MAX4322ESA+ is the direct active equivalent manufactured by Analog Devices Inc./Maxim Integrated. This part maintains identical electrical specifications and packaging to the obsolete MAX4322ESA. The primary difference is product status (Active vs. Obsolete) and RoHS3 compliance. MAX4322ESA+ is packaged in Tube format and is recommended as the primary replacement for existing MAX4322ESA designs.

Microchip MCP Series Substitutes:

MCP603T-I/SN and MCP6281-E/SN / MCP6281T-E/SN / MCP6283-E/SN / MCP6283T-E/SN are active Microchip alternatives. These parts share the 8-SOIC package and rail-to-rail output configuration. MCP603T-I/SN operates within the -40°C to 85°C temperature range matching the original specification. MCP6281 and MCP6283 series extend the operating temperature to 125°C and offer improved slew rate (2.5 V/µs) and gain bandwidth product (5 MHz) matching the original. All Microchip substitutes are RoHS3 compliant and available in multiple packaging formats (Tube, Tape & Reel).

Texas Instruments OPA Series:

OPA317ID and OPA317IDR are zero-drift amplifiers with superior input offset voltage (20 µV) and extremely low input bias current (275 pA). These parts are classified as alternative substitutes due to significantly lower slew rate (0.15 V/µs) and gain bandwidth product (300 kHz), which restrict their use to applications not requiring high-speed performance. OPA317 series is suitable only for precision measurement and low-frequency applications.

Burr Brown OPA343UA:

OPA343UA is a general-purpose amplifier with enhanced slew rate (6 V/µs) and gain bandwidth product (5.5 MHz). This part exceeds the original specifications in dynamic performance but operates within a narrower supply voltage range (2.5 V to 5.5 V maximum). OPA343UA is suitable for applications requiring higher speed performance within the specified supply constraints.

Compliance and Availability:

All active substitute parts carry RoHS3 compliance certification. MAX4322ESA+ offers the highest inventory availability (3227 Pcs) and is the recommended primary choice. MCP603T-I/SN provides the largest inventory (3,000,300 Pcs) for high-volume applications. Selection should prioritize product status (Active), compliance certification, and inventory availability alongside electrical parameter matching.

Frequently Asked Questions (FAQ)

Q: Can MAX4322ESA+ be used as a direct replacement for MAX4322ESA?

A: Yes. MAX4322ESA+ is the active equivalent of the obsolete MAX4322ESA. Both parts share identical electrical specifications, package type (8-SOIC), and operating temperature range (-40°C to 85°C). The primary difference is product status and RoHS3 compliance of the MAX4322ESA+.

Q: What are the key differences between MCP603T-I/SN and MCP6281-E/SN?

A: Both parts are 8-SOIC rail-to-rail amplifiers with identical input offset voltage (700 µV). MCP6281-E/SN offers superior gain bandwidth product (5 MHz vs. 2.8 MHz) and slew rate (2.5 V/µs vs. 2.3 V/µs), matching the original MAX4322ESA specifications more closely. MCP6281-E/SN also extends operating temperature to 125°C. MCP603T-I/SN is limited to -40°C to 85°C but provides lower supply current (230 µA).

Q: Is OPA317ID suitable as a substitute for MAX4322ESA?

A: OPA317ID is not recommended as a general substitute. While it shares the 8-SOIC package and rail-to-rail output, its slew rate (0.15 V/µs) and gain bandwidth product (300 kHz) are significantly lower than the original (2 V/µs and 5 MHz respectively). OPA317ID is suitable only for precision, low-frequency applications where speed is not a requirement.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tube (standard reel packaging), Tape & Reel (TR) for automated assembly, and Cut Tape (CT) & Digi-Reel® for smaller quantities. MCP603T-I/SN, MCP6281T-E/SN, and MCP6283T-E/SN are supplied in Tape & Reel format. MCP601-E/SN, MCP6281-E/SN, MCP6283-E/SN, and OPA317ID are supplied in Tube format. Selection depends on production volume and assembly equipment compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (MAX4322ESA+, MCP series, OPA317 series, and OPA343UA) carry RoHS3 compliance certification. The original MAX4322ESA is RoHS non-compliant. RoHS3 compliance is required for new designs and production in regulated markets.

Q: What is the supply voltage compatibility range for substitutes?

A: MAX4322ESA operates from 2.4 V to 6.5 V. MCP603T-I/SN and MCP6281/MCP6283 series operate from 2.7 V to 6.0 V, which is compatible with most applications within the original range. OPA317 series operates from 1.8 V to 5.5 V, providing lower minimum voltage but reduced maximum voltage. OPA343UA operates from 2.5 V to 5.5 V. Verify supply voltage compatibility for your specific application before substitution.

Q: Which substitute offers the best inventory availability?

A: MCP603T-I/SN provides the highest inventory availability at 3,000,300 Pcs. MAX4322ESA+ offers 3,227 Pcs. For applications requiring immediate availability, MCP603T-I/SN is the optimal choice. For direct replacement with active product status, MAX4322ESA+ is recommended despite lower inventory levels.

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