MAX4044ESD+ Equivalent & Substitute Parts Reference

Part Overview

The MAX4044ESD+ is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, featuring four independent circuits in a 14-SOIC surface-mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MAX4044ESD+ delivers rail-to-rail output capability with low input bias current and is suitable for applications requiring low-power, general-purpose amplification across a 2.4 V to 5.5 V supply range.

Key Parameters

Parameter	MAX4044ESD+	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	Channels
Output Type	Rail-to-Rail	—
Slew Rate	0.04	V/µs
Gain Bandwidth Product	90	kHz
Current - Input Bias	2	nA
Voltage - Input Offset	200	µV
Current - Supply (x4 Channels)	14	µA
Current - Output / Channel	2.5	mA
Voltage - Supply Span (Min)	2.4	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MAX4044ESD+ is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Package compatibility: 14-SOIC form factor (0.154", 3.90mm Width)
Circuit configuration: Four independent amplifier circuits
Output architecture: Rail-to-rail output capability
Supply voltage range: Minimum 2.4 V to maximum 5.5 V overlap
Operating temperature range: -40°C to 85°C minimum coverage
Surface-mount technology compatibility

Substitute parts are grouped into three categories based on performance characteristics:

Direct Low-Power Replacements (MCP609-I/SL, MCP609T-I/SL): CMOS amplifiers with comparable slew rate and bandwidth, suitable for applications where the original performance envelope is acceptable.
Enhanced Performance Replacements (OPA4330AID, OPA4330AIDR): Zero-drift CMOS amplifiers offering superior offset voltage specifications and extended operating temperature range, compatible with supply voltages down to 1.8 V.
High-Speed Replacements (OPA4364AID, OPA4364AIDR, OPA4364AQDRQ1): CMOS amplifiers with significantly higher slew rate and bandwidth, suitable for applications requiring improved dynamic performance while maintaining package compatibility.

All substitute parts maintain 14-SOIC packaging, four-circuit configuration, rail-to-rail output, and RoHS3 compliance.

Parameter Comparison

Parameter	MAX4044ESD+	MCP609-I/SL	MCP609T-I/SL	OPA4330AID	OPA4330AIDR	OPA4364AID	OPA4364AIDR	OPA4364AQDRQ1
Amplifier Type	General Purpose	CMOS	CMOS	CMOS, Zero-Drift	CMOS, Zero-Drift	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.04	0.08	0.08	0.16	0.16	5	5	5
Gain Bandwidth Product (kHz)	90	155	155	350	350	7000	7000	7000
Current - Input Bias (pA/nA)	2 nA	1 pA	1 pA	200 pA	200 pA	1 pA	1 pA	1 pA
Voltage - Input Offset (µV)	200	250	250	8	8	1000	1000	1000
Current - Supply (µA, x4 Channels)	14	18.7	18.7	21	21	1100	1100	1100
Current - Output / Channel (mA)	2.5	17	17	5	5	85	85	85
Voltage - Supply Span Min (V)	2.4	2.5	2.5	1.8	1.8	1.8	1.8	1.8
Voltage - Supply Span Max (V)	5.5	6	6	5.5	5.5	5.5	5.5	5.5
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement in Existing Designs:

The MCP609-I/SL and MCP609T-I/SL (Microchip Technology) serve as the closest functional equivalents to the MAX4044ESD+. Both devices maintain identical 14-SOIC packaging, four-circuit configuration, and rail-to-rail output architecture. These CMOS amplifiers operate within the required -40°C to 85°C temperature range and are fully RoHS3 compliant with MSL 1 rating. The MCP609 series exhibits improved slew rate (0.08 V/µs versus 0.04 V/µs) and higher gain bandwidth product (155 kHz versus 90 kHz), providing enhanced performance without requiring circuit redesign. Supply voltage compatibility spans 2.5 V to 6 V, encompassing the original 2.4 V to 5.5 V specification.

For Applications Requiring Extended Temperature Range:

The OPA4330AID and OPA4330AIDR (Texas Instruments) are zero-drift CMOS amplifiers offering superior offset voltage performance (8 µV versus 200 µV) and extended operating temperature range (-40°C to 125°C). These devices are suitable for precision applications where offset voltage stability is critical. Both variants maintain 14-SOIC packaging and RoHS3 compliance. The OPA4330AIDR is supplied in Cut Tape & Digi-Reel® format, while the OPA4330AID is supplied in Tube format. MSL rating is 2 (1 Year), requiring appropriate moisture control during storage and handling.

For High-Performance Applications:

The OPA4364AID, OPA4364AIDR, and OPA4364AQDRQ1 (Texas Instruments) deliver significantly enhanced dynamic performance with 5 V/µs slew rate and 7 MHz gain bandwidth product. These CMOS amplifiers are suitable for applications requiring faster signal processing and higher output current capability (85 mA per channel versus 2.5 mA). All three variants maintain 14-SOIC packaging and RoHS3 compliance. The OPA4364AQDRQ1 variant includes automotive-grade qualification (AEC-Q100) with MSL 1 rating, making it suitable for automotive and harsh-environment applications. Extended operating temperature range (-40°C to 125°C) is standard across all OPA4364 variants.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original MAX4044ESD+ regulatory profile. ECCN classification remains EAR99 for all alternatives. Moisture sensitivity levels vary: MCP609 series and OPA4364AQDRQ1 carry MSL 1 (Unlimited), while OPA4330 and standard OPA4364 variants carry MSL 2 (1 Year), requiring controlled storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the MCP609T-I/SL directly replace the MAX4044ESD+ without circuit modifications?

A: Yes, the MCP609T-I/SL is mechanically and electrically compatible for direct substitution. Both devices feature identical 14-SOIC packaging, four independent amplifier circuits, and rail-to-rail output capability. The MCP609T-I/SL operates within the required -40°C to 85°C temperature range and accepts supply voltages from 2.5 V to 6 V, which encompasses the original 2.4 V to 5.5 V specification. The improved slew rate and bandwidth of the MCP609T-I/SL provide enhanced performance without requiring design changes.

Q: What is the key difference between the OPA4330AIDR and OPA4364AIDR?

A: The primary differences are slew rate, gain bandwidth product, and input offset voltage. The OPA4330AIDR is a zero-drift amplifier with 0.16 V/µs slew rate, 350 kHz bandwidth, and 8 µV offset voltage, optimized for precision applications. The OPA4364AIDR is a standard CMOS amplifier with 5 V/µs slew rate, 7 MHz bandwidth, and 1 mV offset voltage, optimized for high-speed applications. Both maintain 14-SOIC packaging and -40°C to 125°C operating range. Selection depends on whether precision or speed is the primary design requirement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed—MCP609-I/SL, MCP609T-I/SL, OPA4330AID, OPA4330AIDR, OPA4364AID, OPA4364AIDR, and OPA4364AQDRQ1—are ROHS3 compliant. All maintain REACH unaffected status and EAR99 ECCN classification, matching the regulatory profile of the original MAX4044ESD+.

Q: What is the significance of the MSL rating difference between substitute parts?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before requiring baking. MCP609 series and OPA4364AQDRQ1 carry MSL 1 (Unlimited), allowing indefinite storage without moisture control. OPA4330 and standard OPA4364 variants carry MSL 2 (1 Year), requiring that components be baked for 168 hours at 125°C if storage exceeds one year or if moisture absorption is suspected. For high-volume production with extended inventory, MSL 1 rated parts reduce handling complexity.

Q: Which substitute part offers the best balance between performance and power consumption?

A: The MCP609-I/SL and MCP609T-I/SL offer optimal balance for general-purpose applications. With 18.7 µA total supply current (versus 14 µA for the original), they provide improved slew rate (0.08 V/µs) and bandwidth (155 kHz) with minimal power increase. For applications where ultra-low power is critical and performance requirements are modest, the MCP609 series is recommended. For applications requiring precision, the OPA4330 series adds only 7 µA additional current while delivering 25× improvement in offset voltage (8 µV versus 200 µV).

Q: Is the OPA4364AQDRQ1 suitable for automotive applications?

A: Yes, the OPA4364AQDRQ1 is specifically qualified for automotive applications under AEC-Q100 standard. This variant includes automotive-grade qualification and carries MSL 1 (Unlimited) rating, making it suitable for automotive and harsh-environment applications. It maintains all electrical specifications of the standard OPA4364 series while meeting automotive reliability and qualification requirements.

Q: What packaging format options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tube (MCP609-I/SL, OPA4330AID, OPA4364AID), Cut Tape & Digi-Reel® (MCP609T-I/SL, OPA4330AIDR), and Tape & Reel (OPA4364AIDR, OPA4364AQDRQ1). Selection depends on production volume and assembly equipment compatibility. Tube packaging is suitable for lower-volume applications, while Tape & Reel formats are optimized for high-volume automated assembly.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message