MAX4078ESD Equivalent & Substitute Parts

Part Overview

The MAX4078ESD 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, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The MAX4078ESD operates across a 2.5 V to 5.5 V supply range with rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications. Due to its obsolete status and non-RoHS3 compliance, alternative components with active product status and modern compliance certifications are required for new designs and legacy system replacements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	0.09	V/µs
Gain Bandwidth Product	230	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	1.2	mV
Current - Supply (x4 Channels)	45	µA
Current - Output / Channel	20	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 70	°C
Package / Case	14-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

Substitution of the MAX4078ESD 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 count: Four independent amplifier circuits
Output configuration: Rail-to-rail output capability
Supply voltage range: Minimum 2.5 V, maximum 5.5 V
Mounting type: Surface mount

Secondary Compatibility Parameters:

Slew rate: 0.09 V/µs or greater
Gain bandwidth product: 230 kHz or greater
Input bias current: 1 pA or lower
Input offset voltage: 1.2 mV or lower
Output current per channel: 20 mA or greater
Supply current: 45 µA or lower (x4 channels)

Substitute parts are grouped into two categories: direct packaging equivalents (same packaging and compliance status) and functional alternatives (enhanced electrical performance with active product status and modern compliance certifications).

Parameter Comparison

Parameter	MAX4078ESD	MAX4078ESD+	ISL28430FBZ	LMP2234AMA/NOPB	LMV324IDR	LMV324LIDT
Manufacturer	Analog Devices	Analog Devices	Renesas	Texas Instruments	UMW	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active
Number of Circuits	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Differential, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.09	0.09	0.2	0.048	—	0.7
Gain Bandwidth Product (kHz)	230	230	400	130	1000	1300
Current - Input Bias (pA)	1	1	250	0.02	10	27
Voltage - Input Offset (mV)	1.2	1.2	0.005	0.01	0.8	1
Current - Supply µA (x4 Channels)	45	45	20	36	45	130
Current - Output / Channel (mA)	20	20	15	30	25	70
Voltage - Supply Span Min (V)	2.5	2.5	1.8	1.6	2.1	2.7
Voltage - Supply Span Max (V)	5.5	5.5	5.5	5.5	5.5	5.5
Operating Temperature (°C)	-40 to 70	-40 to 70	-40 to 125	-40 to 125	-25 to 85	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalent (Packaging & Compliance Upgrade):

MAX4078ESD+ is the direct successor to MAX4078ESD, maintaining identical electrical specifications while upgrading to ROHS3 compliance and active product status. This part is recommended for legacy system maintenance where electrical performance requirements remain unchanged and supply continuity is prioritized.

Enhanced Performance Alternatives:

ISL28430FBZ (Renesas) provides improved electrical performance with 0.2 V/µs slew rate, 400 kHz gain bandwidth product, and extended operating temperature range (-40°C to 125°C). This device is suitable for applications requiring faster signal processing and wider temperature operation while maintaining 14-SOIC package compatibility and ROHS3 compliance.

LMP2234 Series (Texas Instruments) offers superior input offset voltage (10 µV) and input bias current (0.02 pA) with differential output capability. Available in multiple packaging options (Tube and Tape & Reel), this series supports extended temperature operation (-40°C to 125°C) and ROHS3 compliance. Variants include LMP2234AMA/NOPB, LMP2234AMAE/NOPB, LMP2234AMAX/NOPB, LMP2234BMA/NOPB, LMP2234BMAE/NOPB, and LMP2234BMAX/NOPB.

LMV324 Series (STMicroelectronics and UMW) provides higher gain bandwidth product (1 MHz to 1.3 MHz) and greater output current capability (25 mA to 70 mA). LMV324LIDT (STMicroelectronics) supports extended temperature range (-40°C to 125°C) with 0.7 V/µs slew rate. LMV324IDR (UMW) operates across -25°C to 85°C with 1 MHz bandwidth. Both variants maintain 14-SOIC package compatibility and ROHS3 compliance.

Selection Basis:

All recommended substitutes maintain 14-SOIC surface-mount packaging, four-circuit configuration, and rail-to-rail output capability. Selection should be based on: (1) product status (all alternatives are active), (2) RoHS3 compliance requirement (all alternatives comply), (3) operating temperature range requirement, and (4) specific electrical performance needs (slew rate, bandwidth, input offset voltage, output current).

Frequently Asked Questions (FAQ)

Q: Can MAX4078ESD+ be used as a direct replacement for MAX4078ESD?

A: Yes. MAX4078ESD+ maintains identical electrical specifications and 14-SOIC package configuration. The primary difference is active product status and ROHS3 compliance. No circuit redesign is required.

Q: What is the key difference between MAX4078ESD and ISL28430FBZ?

A: ISL28430FBZ provides enhanced performance with 0.2 V/µs slew rate (versus 0.09 V/µs), 400 kHz gain bandwidth product (versus 230 kHz), and extended operating temperature to 125°C. Both maintain 14-SOIC packaging and rail-to-rail output. ISL28430FBZ is suitable for applications requiring faster transient response.

Q: Are LMP2234 variants interchangeable with MAX4078ESD?

A: LMP2234 variants are functionally compatible within the 14-SOIC package and four-circuit configuration. However, they feature differential output capability and superior input offset voltage (10 µV versus 1.2 mV). Verify circuit topology compatibility before substitution, particularly regarding output stage configuration.

Q: What is the difference between LMV324IDR and LMV324LIDT?

A: Both devices provide 14-SOIC packaging and four-circuit configuration. LMV324LIDT (STMicroelectronics) operates across -40°C to 125°C with 0.7 V/µs slew rate and 1.3 MHz bandwidth. LMV324IDR (UMW) operates across -25°C to 85°C with 1 MHz bandwidth. Select based on required temperature range and slew rate performance.

Q: Does packaging type (Tube versus Tape & Reel) affect electrical performance?

A: No. Packaging type (Tube, Cut Tape, or Tape & Reel) affects only handling, storage, and assembly processes. Electrical specifications remain identical across packaging variants of the same base part number.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification. MAX4078ESD is RoHS non-compliant; therefore, MAX4078ESD+ or alternative parts must be selected for applications requiring RoHS3 compliance.

Q: What is the significance of Moisture Sensitivity Level (MSL)?

A: MSL indicates moisture absorption limits during storage and handling. MSL 1 (Unlimited) allows indefinite storage without baking. MSL 2 (1 Year) requires baking before reflow if storage exceeds one year. MAX4078ESD, MAX4078ESD+, and most LMP2234 variants carry MSL 1. ISL28430FBZ carries MSL 2, requiring attention to storage protocols.

Q: Can LMV324 series replace MAX4078ESD in all applications?

A: LMV324 series provides higher bandwidth (1 MHz to 1.3 MHz) and greater output current capability. These enhancements are compatible with MAX4078ESD applications. However, verify that higher bandwidth does not introduce unwanted noise or stability issues in your specific circuit topology.

Q: What supply voltage range is common across all substitutes?

A: All substitute parts support maximum supply voltage of 5.5 V. Minimum supply voltage varies: MAX4078ESD and MAX4078ESD+ require 2.5 V minimum; ISL28430FBZ requires 1.8 V minimum; LMP2234 series requires 1.6 V minimum; LMV324IDR requires 2.1 V minimum; LMV324LIDT requires 2.7 V minimum. Verify minimum supply voltage compatibility with your application.

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