MAX4403ASD Equivalent & Substitute Parts

Part Overview

The MAX4403ASD is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface-mount package, manufactured by Analog Devices Inc./Maxim Integrated. This device provides rail-to-rail output capability with a supply voltage range of 2.5V to 5.5V and operates across the industrial temperature range of -40°C to 125°C.

The MAX4403ASD is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives with comparable electrical characteristics and identical packaging are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	1	V/µs
Gain Bandwidth Product	800	kHz
Current - Input Bias	0.1	pA
Voltage - Input Offset	1	mV
Current - Supply (x4 Channels)	410	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the MAX4403ASD is determined by the following critical parameters:

Primary Substitution Criteria:

Four independent operational amplifier circuits
Rail-to-rail output configuration
14-SOIC or compatible 14-SOP package footprint
Supply voltage range compatibility (minimum 2.5V, maximum 5.5V)
Operating temperature range (-40°C to 125°C preferred)
Surface-mount technology

Secondary Compatibility Factors:

Slew rate (1V/µs baseline; higher values acceptable)
Gain bandwidth product (800 kHz baseline; higher values acceptable)
Input bias current (0.1 pA baseline; lower values acceptable)
Input offset voltage (1 mV baseline; lower values acceptable)
Output current per channel (30 mA baseline; higher values acceptable)
Supply current (410µA baseline; lower values preferred)

Substitutes are grouped into two categories: Direct Equivalents (identical electrical performance and packaging) and Functional Alternatives (compatible electrical characteristics with minor performance variations).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Output Type	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (mV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
MAX4403ASD	Analog Devices	General Purpose	4	Rail-to-Rail	1	800	0.1	1	2.5	5.5	-40 to 125	14-SOIC	Obsolete
MAX4403ASD+	Analog Devices	General Purpose	4	Rail-to-Rail	1	800	0.1	1	2.5	5.5	-40 to 125	14-SOIC	Active
BU7244F-E2	Rohm Semiconductor	CMOS	4	Rail-to-Rail	0.4	900	1	1	1.8	5.5	-40 to 85	14-SOP	Active
BU7244SF-E2	Rohm Semiconductor	CMOS	4	Rail-to-Rail	0.4	900	1	1	1.8	5.5	-40 to 85	14-SOP	Active
LMP2234AMAX/NOPB	Texas Instruments	General Purpose	4	Differential, Rail-to-Rail	0.048	130	0.02	0.01	1.6	5.5	-40 to 125	14-SOIC	Active
LMP2234BMA/NOPB	Texas Instruments	General Purpose	4	Differential, Rail-to-Rail	0.048	130	0.02	0.01	1.6	5.5	-40 to 125	14-SOIC	Active
LMP2234BMAX/NOPB	Texas Instruments	General Purpose	4	Differential, Rail-to-Rail	0.048	130	0.02	0.01	1.6	5.5	-40 to 125	14-SOIC	Active
LMR934F-GE2	Rohm Semiconductor	General Purpose	4	Rail-to-Rail	0.35	1400	5	1	1.8	5	-40 to 85	14-SOP	Active
LMV324AM14X	onsemi	General Purpose	4	Rail-to-Rail	1.5	1400	1	1	2.7	5.5	-40 to 125	14-SOIC	Obsolete
LMV324BG-13	Diodes Incorporated	General Purpose	4	Rail-to-Rail	1	1000	15	1.7	2.7	5.5	-40 to 125	14-SOIC	Active
LMV324IDR	UMW	Voltage Feedback	4	Rail-to-Rail	—	1000	10	0.8	2.1	5.5	-25 to 85	14-SOP	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

MAX4403ASD+ is the direct equivalent of MAX4403ASD. Both parts share identical electrical specifications, package configuration (14-SOIC), and operating temperature range (-40°C to 125°C). The primary distinction is product status: MAX4403ASD+ is active and ROHS3 compliant, whereas the original MAX4403ASD is obsolete and RoHS non-compliant. This part is the preferred substitute for direct replacement in new designs and production continuity.

Active Substitutes with 14-SOIC Package (Identical Footprint):

LMP2234AMAX/NOPB, LMP2234BMA/NOPB, and LMP2234BMAX/NOPB (Texas Instruments) maintain the 14-SOIC package footprint and full operating temperature range (-40°C to 125°C). These parts feature differential output configuration and lower input offset voltage (10 µV vs. 1 mV). However, slew rate (0.048V/µs) and gain bandwidth product (130 kHz) are significantly lower than the MAX4403ASD. These substitutes are suitable for applications where lower bandwidth and reduced slew rate are acceptable.

LMV324BG-13 (Diodes Incorporated) provides 14-SOIC package compatibility with active product status and full temperature range support. Electrical characteristics closely match the MAX4403ASD, with comparable slew rate (1V/µs) and gain bandwidth product (1 MHz). Input bias current is higher (15 nA vs. 0.1 pA) and input offset voltage is slightly elevated (1.7 mV vs. 1 mV).

Active Substitutes with 14-SOP Package (Compatible Footprint):

BU7244F-E2 and BU7244SF-E2 (Rohm Semiconductor) offer CMOS amplifier architecture with four circuits and rail-to-rail output. Package footprint is 14-SOP (0.173", 4.40mm width), which is mechanically compatible with 14-SOIC designs. Operating temperature range is limited to -40°C to 85°C. Gain bandwidth product (900 kHz) is comparable; however, slew rate (0.4V/µs) is reduced.

LMR934F-GE2 (Rohm Semiconductor) provides enhanced gain bandwidth product (1.4 MHz) and higher output current per channel (90 mA vs. 30 mA). Package is 14-SOP with -40°C to 85°C operating range. Supply voltage maximum is 5V (vs. 5.5V for MAX4403ASD).

Compliance and Certification Status:

MAX4403ASD+ carries ROHS3 compliance and REACH unaffected status. All active substitutes listed (BU7244F-E2, BU7244SF-E2, LMP2234 series, LMR934F-GE2, LMV324BG-13, LMV324IDR) are ROHS3 compliant and REACH unaffected. The original MAX4403ASD is RoHS non-compliant; therefore, new designs should transition to compliant alternatives.

Frequently Asked Questions (FAQ)

Q: Can MAX4403ASD+ be used as a direct replacement for MAX4403ASD?

A: Yes. MAX4403ASD+ is electrically and mechanically identical to MAX4403ASD. Both parts feature four general-purpose operational amplifier circuits, rail-to-rail output, 14-SOIC package, and identical electrical specifications. The primary difference is product status: MAX4403ASD+ is active and ROHS3 compliant, while MAX4403ASD is obsolete and RoHS non-compliant. MAX4403ASD+ is the recommended substitute for production continuity.

Q: What is the difference between 14-SOIC and 14-SOP packages?

A: Both 14-SOIC and 14-SOP are surface-mount packages with 14 pins. The primary difference is body width: 14-SOIC is 0.154 inches (3.90mm), while 14-SOP is 0.173 inches (4.40mm). These packages are mechanically compatible on PCBs designed with standard 14-pin SOIC footprints, though the wider 14-SOP body may require footprint verification. Pin pitch and spacing are identical.

Q: Are the LMP2234 series parts suitable substitutes for MAX4403ASD?

A: LMP2234AMAX/NOPB, LMP2234BMA/NOPB, and LMP2234BMAX/NOPB are functionally compatible substitutes with identical 14-SOIC package and full temperature range (-40°C to 125°C). However, these parts feature differential output configuration and significantly lower bandwidth (130 kHz vs. 800 kHz) and slew rate (0.048V/µs vs. 1V/µs). They are suitable only for applications where reduced bandwidth is acceptable.

Q: What are the key differences between the Rohm BU7244 series and MAX4403ASD?

A: BU7244F-E2 and BU7244SF-E2 use CMOS amplifier architecture versus the general-purpose design of MAX4403ASD. Both provide four circuits with rail-to-rail output. The BU7244 series operates at -40°C to 85°C (vs. -40°C to 125°C), uses 14-SOP package (vs. 14-SOIC), and features lower slew rate (0.4V/µs vs. 1V/µs). Gain bandwidth product is comparable (900 kHz vs. 800 kHz).

Q: Is LMV324IDR compatible with MAX4403ASD?

A: LMV324IDR provides four voltage feedback amplifier circuits with rail-to-rail output in a 14-SOP package. Operating temperature range is limited to -25°C to 85°C (vs. -40°C to 125°C). Gain bandwidth product (1 MHz) is comparable; however, the reduced temperature range may restrict use in industrial applications requiring full -40°C to 125°C operation.

Q: Which substitute offers the best performance match to MAX4403ASD?

A: MAX4403ASD+ provides the closest performance match with identical electrical specifications and 14-SOIC package. For active alternatives, LMV324BG-13 (Diodes Incorporated) offers comparable slew rate (1V/µs), gain bandwidth product (1 MHz), and full temperature range (-40°C to 125°C) in the same 14-SOIC package. LMV324BG-13 is ROHS3 compliant and actively manufactured.

Q: Can I use BU7244F-E2 in place of MAX4403ASD in a -40°C to 125°C application?

A: No. BU7244F-E2 is rated for -40°C to 85°C operation only. Applications requiring full industrial temperature range (-40°C to 125°C) must use substitutes with equivalent temperature specifications, such as MAX4403ASD+, LMP2234 series, or LMV324BG-13.

Q: What is the supply voltage compatibility range for substitute parts?

A: MAX4403ASD operates at 2.5V to 5.5V. Most active substitutes support this range or wider: BU7244 series (1.8V to 5.5V), LMP2234 series (1.6V to 5.5V), LMR934F-GE2 (1.8V to 5V), LMV324BG-13 (2.7V to 5.5V), and LMV324IDR (2.1V to 5.5V). Verify minimum supply voltage requirements for your specific application.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (MAX4403ASD+, BU7244F-E2, BU7244SF-E2, LMP2234 series, LMR934F-GE2, LMV324BG-13, LMV324IDR) are ROHS3 compliant. The original MAX4403ASD is RoHS non-compliant. New designs should transition to compliant alternatives to meet regulatory requirements.

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