MAX4487ASD-T Equivalent & Substitute Parts

Part Overview

The MAX4487ASD-T is a general purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, configured as a 4-circuit rail-to-rail amplifier in a 14-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance. The MAX4487ASD-T operates across a 2.7V to 5.5V supply range with a slew rate of 20V/µs and gain bandwidth product of 7 MHz, serving applications requiring moderate-speed amplification with rail-to-rail output capability.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the MAX4487ASD-T is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitution relationships:

Primary Substitution Criteria:

Number of Circuits: Must be 4
Output Type: Must be Rail-to-Rail
Mounting Type: Must be Surface Mount
Package Type: Must be 14-SOIC or 14-SOP (mechanically compatible)
Supply Voltage Range: Must encompass or match the 2.7V to 5.5V span
Operating Temperature: Must support -40°C to 125°C or equivalent industrial range

Secondary Electrical Parameters:

Slew Rate: 20V/µs (baseline reference)
Gain Bandwidth Product: 7 MHz (baseline reference)
Input Bias Current: 0.1 pA (baseline reference)
Input Offset Voltage: 300 µV (baseline reference)
Output Current per Channel: 33 mA (baseline reference)

Substitute parts are grouped into two categories based on their electrical performance relative to the MAX4487ASD-T:

Category A - Direct Performance Equivalents: Parts with slew rate and gain bandwidth product within ±50% of the original specification, maintaining comparable speed and bandwidth characteristics.

Category B - Functional Alternatives: Parts with lower slew rate or bandwidth but meeting all mechanical and supply voltage requirements, suitable for applications where the original performance margin is not critical.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Product Status
MAX4487ASD-T	Analog Devices	General Purpose	20	7	0.1	300	2.7	5.5	-40 to 125	14-SOIC	Obsolete
BU7244F-E2	Rohm Semiconductor	CMOS	0.4	0.9	1	1000	1.8	5.5	-40 to 85	14-SOP	Active
BU7244SF-E2	Rohm Semiconductor	CMOS	0.4	0.9	1	1000	1.8	5.5	-40 to 85	14-SOP	Active
LMP2234BMA/NOPB	Texas Instruments	General Purpose	0.048	0.13	0.02	10	1.6	5.5	-40 to 125	14-SOIC	Active
LMP2234BMAX/NOPB	Texas Instruments	General Purpose	0.048	0.13	0.02	10	1.6	5.5	-40 to 125	14-SOIC	Active
LMR934F-GE2	Rohm Semiconductor	General Purpose	0.35	1.4	5	1000	1.8	5	-40 to 85	14-SOP	Active
LMV324IDR	UMW	Voltage Feedback	—	1	10	800	2.1	5.5	-25 to 85	14-SOP	Active
LMV324MX	National Semiconductor	General Purpose	1	1	15	1700	2.7	5.5	-40 to 125	14-SOIC	Active
LMV824DR2G	onsemi	General Purpose	2	5.6	119	1000	2.7	5.5	-40 to 85	14-SOIC	Active
MCP6424-E/SL	Microchip Technology	General Purpose	0.05	0.09	1	1000	1.8	5.5	-40 to 125	14-SOIC	Active
MCP6424T-E/SL	Microchip Technology	General Purpose	0.05	0.09	1	1000	1.8	5.5	-40 to 125	14-SOIC	Active

Engineering Selection Recommendations

For Direct Replacement (Mechanical and Electrical Compatibility):

The LMV824DR2G (onsemi) provides the closest electrical performance match with a slew rate of 2V/µs and gain bandwidth product of 5.6 MHz, maintaining the 14-SOIC package format and -40°C to 125°C operating range. This part is ROHS3 compliant and active in production. However, the upper operating temperature is limited to 85°C, which may restrict use in high-temperature applications.

The MCP6424-E/SL and MCP6424T-E/SL (Microchip Technology) offer identical electrical specifications with extended temperature support (-40°C to 125°C) and ROHS3 compliance. These parts feature lower slew rate (0.05V/µs) and gain bandwidth product (90 kHz), making them suitable for applications where the original performance margin exceeds system requirements.

For Extended Supply Voltage Range:

The LMP2234BMA/NOPB and LMP2234BMAX/NOPB (Texas Instruments) support a minimum supply voltage of 1.6V, enabling operation in lower-voltage systems. Both maintain the 14-SOIC package and -40°C to 125°C temperature range with ROHS3 compliance. These parts feature differential output capability and significantly lower slew rate (0.048V/µs), requiring application-level verification.

For Automotive and High-Temperature Applications:

The LMV324MX (National Semiconductor) is qualified to AEC-Q100 automotive standards and maintains the full -40°C to 125°C operating range with 14-SOIC packaging. This part is RoHS non-compliant and REACH-affected, requiring compliance verification before use in regulated applications.

For Low-Power Applications:

The BU7244F-E2 and BU7244SF-E2 (Rohm Semiconductor) feature ultra-low supply current (360µA total) with CMOS architecture, suitable for battery-powered systems. Both are ROHS3 compliant and active in production. Operating temperature is limited to -40°C to 85°C, and package width is 4.40mm (compared to 3.90mm for the original).

Frequently Asked Questions (FAQ)

Q1: Can the MAX4487ASD-T be directly replaced with any of these substitute parts without PCB modification?

A: Direct replacement without PCB modification is possible only with parts using the 14-SOIC package with 0.154" (3.90mm) width: LMP2234BMA/NOPB, LMP2234BMAX/NOPB, LMV324MX, LMV824DR2G, MCP6424-E/SL, and MCP6424T-E/SL. Parts using 14-SOP packaging with 0.173" (4.40mm) width (BU7244F-E2, BU7244SF-E2, LMR934F-GE2, LMV324IDR) require PCB footprint verification due to dimensional differences.

Q2: Which substitute part maintains the closest electrical performance to the MAX4487ASD-T?

A: The LMV824DR2G provides the closest match with a slew rate of 2V/µs and gain bandwidth product of 5.6 MHz, compared to the original 20V/µs and 7 MHz. However, this part is limited to -40°C to 85°C operation. For full temperature range (-40°C to 125°C) with comparable performance, the MCP6424-E/SL or MCP6424T-E/SL are recommended, though they feature lower slew rate and bandwidth.

Q3: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant except the LMV324MX, which is RoHS non-compliant and REACH-affected. Compliance verification is required before selecting the LMV324MX for regulated applications.

Q4: What is the difference between BU7244F-E2 and BU7244SF-E2?

A: Both parts are electrically identical CMOS amplifiers from Rohm Semiconductor with identical specifications. The primary difference is packaging: BU7244F-E2 is supplied in Cut Tape (CT) & Digi-Reel format, while BU7244SF-E2 is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q5: Can I use MCP6424-E/SL and MCP6424T-E/SL interchangeably?

A: Yes, these parts are electrically identical. MCP6424-E/SL is supplied in Tube packaging, while MCP6424T-E/SL is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements and packaging preferences.

Q6: Which substitute part offers the lowest power consumption?

A: The BU7244F-E2 and BU7244SF-E2 offer the lowest total supply current at 360µA, compared to the MAX4487ASD-T at 2.2mA. The MCP6424-E/SL and MCP6424T-E/SL also provide low power consumption at 4.4µA total, making them suitable for battery-powered applications.

Q7: What are the temperature range limitations for each substitute?

A: Parts supporting the full -40°C to 125°C range include LMP2234BMA/NOPB, LMP2234BMAX/NOPB, LMV324MX, MCP6424-E/SL, and MCP6424T-E/SL. Parts limited to -40°C to 85°C include BU7244F-E2, BU7244SF-E2, LMR934F-GE2, and LMV824DR2G. The LMV324IDR is limited to -25°C to 85°C.

Q8: Which substitute parts are currently in active production?

A: All substitute parts listed are in active production status. The MAX4487ASD-T is classified as obsolete, making these active alternatives necessary for design continuity and new production.

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