MAX4487ASD+ Equivalent & Substitute Parts Reference

Part Overview

The MAX4487ASD+ 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 delivers rail-to-rail output capability with a 20V/µs slew rate and 7 MHz gain-bandwidth product, designed for applications requiring moderate-speed signal conditioning and amplification across a 2.7V to 5.5V supply range.

The MAX4487ASD+ is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX4487ASD+
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Linear, Amplifiers
Product Status	Obsolete
Amplifier Type	General Purpose
Number of Circuits	4
Output Type	Rail-to-Rail
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage - Supply Span (Min)	2.7 V
Voltage - Supply Span (Max)	5.5 V
Operating Temperature	-40°C ~ 125°C
Slew Rate	20 V/µs
Gain Bandwidth Product	7 MHz
Current - Input Bias	0.1 pA
Voltage - Input Offset	300 µV
Current - Supply	2.2 mA (x4 Channels)
Current - Output / Channel	33 mA
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX4487ASD+ is determined by the following critical parameters:

Primary Substitution Criteria:

Number of circuits: 4 independent amplifier channels
Package type: 14-SOIC surface-mount configuration
Output configuration: Rail-to-rail output capability
Supply voltage range: Minimum 2.7V to maximum 5.5V overlap
Operating temperature range: Support for -40°C to 125°C
Amplifier classification: General-purpose operational amplifier

Secondary Compatibility Parameters:

Slew rate: 20V/µs (MAX4487ASD+) establishes performance baseline
Gain-bandwidth product: 7 MHz (MAX4487ASD+) establishes frequency response baseline
Input bias current: 0.1 pA (MAX4487ASD+)
Input offset voltage: 300 µV (MAX4487ASD+)
Output current per channel: 33 mA (MAX4487ASD+)

Substitute parts are grouped based on functional equivalence within these electrical and mechanical constraints. Parts meeting all primary criteria are classified as direct substitutes. Parts with reduced performance in secondary parameters but maintaining primary functionality are classified as functional alternatives.

Parameter Comparison

Parameter	MAX4487ASD+	BU7244F-E2	BU7244SF-E2	LMP2234AMA/NOPB	LMP2234AMAE/NOPB	LMP2234AMAX/NOPB	LMP2234BMA/NOPB	LMP2234BMAX/NOPB	LMR934F-GE2	LMV324IDR	LMV324LIDT
Manufacturer	Analog Devices	Rohm	Rohm	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Rohm	UMW	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Amplifier Type	General Purpose	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	Voltage Feedback	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Differential, Rail-to-Rail	Differential, Rail-to-Rail	Differential, Rail-to-Rail	Differential, Rail-to-Rail	Differential, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
Voltage - Supply Span (Min)	2.7 V	1.8 V	1.8 V	1.6 V	1.6 V	1.6 V	1.6 V	1.6 V	1.8 V	2.1 V	2.7 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.0 V	5.5 V	5.5 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-25°C ~ 85°C	-40°C ~ 125°C
Slew Rate	20 V/µs	0.4 V/µs	0.4 V/µs	0.048 V/µs	0.048 V/µs	0.048 V/µs	0.048 V/µs	0.048 V/µs	0.35 V/µs	Not specified	0.7 V/µs
Gain Bandwidth Product	7 MHz	900 kHz	900 kHz	130 kHz	130 kHz	130 kHz	130 kHz	130 kHz	1.4 MHz	1 MHz	1.3 MHz
Current - Input Bias	0.1 pA	1 pA	1 pA	0.02 pA	0.02 pA	0.02 pA	0.02 pA	0.02 pA	5 nA	10 pA	27 nA
Voltage - Input Offset	300 µV	1 mV	1 mV	10 µV	10 µV	10 µV	10 µV	10 µV	1 mV	800 µV	1 mV
Current - Supply	2.2 mA (x4)	360 µA	360 µA	36 µA (x4)	36 µA (x4)	36 µA (x4)	36 µA (x4)	36 µA (x4)	250 µA	45 µA	130 µA (x4)
Current - Output / Channel	33 mA	12 mA	12 mA	30 mA	30 mA	30 mA	30 mA	30 mA	90 mA	25 mA	70 mA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Temperature Range Support):

The LMP2234 series from Texas Instruments (LMP2234AMA/NOPB, LMP2234AMAE/NOPB, LMP2234AMAX/NOPB, LMP2234BMA/NOPB, LMP2234BMAX/NOPB) represents the most direct functional replacement for the MAX4487ASD+. These devices maintain the identical 14-SOIC package footprint (0.154", 3.90mm width), support the full -40°C to 125°C operating temperature range, and deliver rail-to-rail output capability across the 1.6V to 5.5V supply range. All variants are ROHS3 compliant with MSL 1 rating. The primary distinction between variants is packaging format: tube (MA/NOPB) or tape & reel (AMAE/NOPB, AMAX/NOPB, BMAX/NOPB). The LMP2234 series exhibits lower slew rate (0.048V/µs) and reduced gain-bandwidth product (130 kHz) compared to the MAX4487ASD+, making these suitable for applications where high-speed performance is not critical.

Secondary Substitutes (Active Status, Reduced Temperature Range):

The BU7244F-E2 and BU7244SF-E2 from Rohm Semiconductor provide four-circuit CMOS amplifier configurations in 14-SOIC packages with rail-to-rail output. These devices operate across 1.8V to 5.5V supply range and support -40°C to 85°C temperature operation. The primary limitation is the reduced upper operating temperature (85°C versus 125°C). Both variants are ROHS3 compliant with MSL 1 rating. The BU7244F-E2 is supplied in cut tape format, while BU7244SF-E2 is supplied in tape & reel format. Slew rate (0.4V/µs) and gain-bandwidth product (900 kHz) are significantly reduced compared to the MAX4487ASD+.

Tertiary Substitutes (Active Status, Performance Trade-offs):

The LMR934F-GE2 from Rohm Semiconductor delivers four general-purpose amplifier circuits in 14-SOIC package with rail-to-rail output, operating across 1.8V to 5.0V supply range and -40°C to 85°C temperature range. This device provides higher output current capability (90 mA per channel) compared to the MAX4487ASD+ (33 mA), making it suitable for applications requiring increased drive capability. However, the reduced upper supply voltage limit (5.0V versus 5.5V) and operating temperature range (85°C versus 125°C) must be evaluated against application requirements.

The LMV324LIDT from STMicroelectronics provides four general-purpose amplifier circuits in 14-SOIC package with rail-to-rail output, supporting the full -40°C to 125°C operating temperature range and 2.7V to 5.5V supply span. This device maintains identical package footprint and temperature range as the MAX4487ASD+, with ROHS3 compliance and MSL 1 rating. The LMV324IDR from UMW provides similar functionality with reduced operating temperature range (-25°C to 85°C).

Compliance and Certification:

All substitute parts listed are ROHS3 compliant and carry MSL 1 (unlimited moisture sensitivity) rating, matching the MAX4487ASD+ compliance profile. All parts are classified as REACH unaffected and carry EAR99 export classification. Substitution decisions should prioritize parts with active product status to ensure long-term supply chain availability.

Frequently Asked Questions (FAQ)

Q1: Can the LMP2234 series directly replace the MAX4487ASD+ in all applications?

The LMP2234 series maintains mechanical and electrical compatibility within the primary substitution criteria: four-circuit configuration, 14-SOIC package footprint, rail-to-rail output, and -40°C to 125°C operating range. However, the significantly reduced slew rate (0.048V/µs versus 20V/µs) and gain-bandwidth product (130 kHz versus 7 MHz) restrict suitability to applications where high-speed signal conditioning is not required. Applications involving fast transient response, high-frequency signal processing, or rapid settling time requirements should not use the LMP2234 series as a direct replacement.

Q2: What is the significance of the package width difference between 0.154" and 0.173"?

The MAX4487ASD+ uses a 14-SOIC package with 0.154" (3.90mm) width, while some substitute parts (BU7244F-E2, BU7244SF-E2, LMR934F-GE2) use 14-SOIC packages with 0.173" (4.40mm) width. This difference affects PCB layout and component density. The wider package may not fit in existing PCB footprints designed for the narrower MAX4487ASD+ package. Mechanical verification of PCB layout compatibility is required before substitution.

Q3: Why do some substitutes have lower operating temperature maximums?

The BU7244 series and LMR934F-GE2 support maximum operating temperatures of 85°C, compared to the MAX4487ASD+ specification of 125°C. This reflects different design and manufacturing processes used by Rohm Semiconductor. Applications requiring operation at temperatures above 85°C must use substitutes with full -40°C to 125°C range, such as the LMP2234 series or LMV324LIDT.

Q4: What is the difference between LMP2234 variants (A versus B, MA versus AMAE versus AMAX)?

The LMP2234 series includes grade variants (A and B) and packaging variants. Grade A and B variants differ in electrical specifications (offset voltage, input bias current) but maintain identical functional operation. Packaging variants include tube (MA/NOPB, BMA/NOPB) and tape & reel (AMAE/NOPB, AMAX/NOPB, BMAX/NOPB) formats. Selection between variants depends on assembly process requirements and procurement specifications. All variants are functionally equivalent for circuit design purposes.

Q5: Can the LMV324 series be used as a substitute despite different input bias current specifications?

The LMV324LIDT exhibits 27 nanoamperes input bias current compared to the MAX4487ASD+ specification of 0.1 picoamperes. This 270,000-fold difference is significant for applications involving high-impedance signal sources or precision instrumentation where input bias current affects measurement accuracy. Applications with input impedances below 1 megohm are generally tolerant of this difference. High-impedance applications (above 10 megohms) should use the LMP2234 series, which specifies 0.02 picoamperes input bias current.

Q6: What supply voltage considerations apply when substituting parts?

The MAX4487ASD+ operates across 2.7V to 5.5V supply range. Most substitute parts support wider minimum supply voltages (1.6V to 1.8V), allowing operation in lower-voltage applications. However, the LMR934F-GE2 specifies a maximum supply voltage of 5.0V, which is 0.5V below the MAX4487ASD+ specification. Applications operating at 5.5V supply voltage cannot use the LMR934F-GE2 without circuit redesign. The LMV324IDR specifies minimum supply voltage of 2.1V, which is compatible with the MAX4487ASD+ 2.7V minimum specification.

Q7: How does output current capability affect substitution decisions?

The MAX4487ASD+ delivers 33 milliamperes per channel output current. The LMP2234 series delivers 30 milliamperes per channel, which is marginally lower but generally acceptable for most applications. The LMR934F-GE2 delivers 90 milliamperes per channel, providing significantly higher drive capability for applications requiring increased output current. The BU7244 series delivers only 12 milliamperes per channel, which is insufficient for applications requiring the full 33 milliampere output current of the MAX4487ASD+.

Q8: Are there supply chain or inventory considerations for substitute selection?

All substitute parts listed carry active product status, indicating ongoing manufacturing and availability. The LMV324LIDT from STMicroelectronics shows the highest inventory level (500,400 pieces), indicating strong supply chain availability. The LMP2234 series variants show moderate inventory levels (1,220 to 3,600 pieces). The BU7244 series shows lower inventory levels (991 to 5,200 pieces). Long-term production programs should prioritize parts with higher inventory levels and active manufacturer support to minimize supply chain risk.

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