MAX4234ASD+ Equivalent & Substitute Parts

Part Overview

The MAX4234ASD+ is a CMOS quad-channel operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for rail-to-rail applications in low-voltage systems. This device integrates four independent amplifier circuits in a 14-SOIC surface-mount package and is classified as Active product status. The MAX4234ASD+ is specified for operation across -40°C to 125°C and supports supply voltages from 2.7V to 5.5V.

Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and functional equivalence. Substitute selection is necessary when the primary part reaches end-of-life status, inventory constraints occur, or design flexibility is required across manufacturing sources while maintaining circuit performance.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	10	V/µs
Gain Bandwidth Product	10	MHz
Current - Input Bias	1	pA
Voltage - Input Offset	850	µV
Current - Supply (x4 Channels)	1.2	mA
Current - Output / Channel	200	mA
Voltage - Supply Span (Min)	2.7	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	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MAX4234ASD+ are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Number of Circuits: 4 independent amplifier channels
Package / Case: 14-SOIC form factor (0.154", 3.90mm Width)
Output Type: Rail-to-Rail configuration
Mounting Type: Surface Mount
Voltage - Supply Span: 2.7V to 5.5V operating range
Operating Temperature: -40°C to 125°C (or compatible subset)

Secondary Performance Parameters:

Slew Rate: 10V/µs or higher
Gain Bandwidth Product: 10 MHz or higher
Current - Input Bias: ≤ 1 pA (CMOS characteristic)
Voltage - Input Offset: ≤ 850 µV
Current - Supply: ≤ 1.2 mA (x4 Channels)
Current - Output / Channel: ≥ 200 mA

Substitutes are classified into two categories: Direct CMOS Equivalents (matching amplifier type and performance tier) and Functional Alternatives (general-purpose amplifiers with compatible electrical specifications and package).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	RoHS Status	Product Status
MAX4234ASD+	Analog Devices	CMOS	10	10	1	850	1.2	200	-40 to 125	ROHS3	Active
TLV2624ID	Texas Instruments	CMOS	7	11	2	250	0.8	28	-40 to 125	ROHS3	Last Time Buy
OPA4343UA	Burr Brown	CMOS	6	5.5	0.2	2000	0.85	50	-40 to 85	—	Active
LMV324MX	National Semiconductor	General Purpose	1	1	15	1700	0.41	160	-40 to 125	Non-compliant	Active
LMV324QD	Texas Instruments	General Purpose	1	1	15	1700	0.41	40	-40 to 125	ROHS3	Last Time Buy
LMV324QDR	Texas Instruments	General Purpose	1	1	15	1700	0.41	40	-40 to 125	ROHS3	Active
MCP6024-E/SL	Microchip Technology	General Purpose	7	10	1	250	1	30	-40 to 125	ROHS3	Active
MCP6024-I/SL	Microchip Technology	General Purpose	7	10	1	500	1	30	-40 to 85	ROHS3	Active
MCP6024T-I/SL	Microchip Technology	General Purpose	7	10	1	500	1	30	-40 to 85	ROHS3	Active
TS464CDT	STMicroelectronics	General Purpose	4	12	200	1000	2	—	-20 to 70	ROHS3	Active

Engineering Selection Recommendations

Direct CMOS Equivalents (Highest Compatibility):

TLV2624ID and OPA4343UA are CMOS amplifiers matching the MAX4234ASD+ amplifier type classification. TLV2624ID maintains the full -40°C to 125°C operating temperature range and ROHS3 compliance. However, TLV2624ID is designated Last Time Buy status, indicating limited future availability. OPA4343UA is Active status but operates only to 85°C, restricting use in extended temperature applications.

Functional Alternatives with Performance Matching:

MCP6024-E/SL, MCP6024-I/SL, and MCP6024T-I/SL are general-purpose amplifiers with slew rate (7V/µs) and gain bandwidth product (10 MHz) matching the MAX4234ASD+. MCP6024-E/SL supports the full -40°C to 125°C temperature range with ROHS3 compliance and Active product status, making it the most suitable functional alternative. MCP6024-I/SL and MCP6024T-I/SL are identical except for packaging (Tube vs. Cut Tape) and operate to 85°C only.

Lower-Performance Alternatives:

LMV324MX, LMV324QD, and LMV324QDR are general-purpose amplifiers with reduced slew rate (1V/µs) and gain bandwidth product (1 MHz). These parts are suitable only for applications not requiring the MAX4234ASD+ performance specifications. LMV324QDR is Active status with ROHS3 compliance and full temperature range. LMV324QD is Last Time Buy status. LMV324MX is RoHS non-compliant.

Limited Compatibility:

TS464CDT operates only to 70°C maximum, restricting use in the full -40°C to 125°C range specified for the MAX4234ASD+. This part is suitable only for applications with reduced temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can TLV2624ID be used as a direct replacement for MAX4234ASD+ in all applications?

A: TLV2624ID is a CMOS amplifier with compatible electrical specifications and package. However, TLV2624ID is designated Last Time Buy status, indicating limited future availability. For new designs requiring long-term supply assurance, MCP6024-E/SL is recommended as an Active-status alternative.

Q: What is the primary difference between MCP6024-E/SL and MCP6024-I/SL?

A: Both parts are identical in electrical performance and package type (14-SOIC). The difference is operating temperature range: MCP6024-E/SL operates -40°C to 125°C, while MCP6024-I/SL operates -40°C to 85°C. Select MCP6024-E/SL for applications requiring the extended upper temperature limit.

Q: Why is LMV324QDR recommended over LMV324QD?

A: Both parts are electrically identical general-purpose amplifiers in 14-SOIC package. LMV324QDR is Active product status with ongoing availability, while LMV324QD is Last Time Buy status. LMV324QDR is preferred for new designs and long-term supply continuity.

Q: Can TS464CDT replace MAX4234ASD+ in automotive applications?

A: TS464CDT operates only to 70°C maximum temperature, which is below the MAX4234ASD+ specification of 125°C. TS464CDT is unsuitable for applications requiring the full -40°C to 125°C operating range. Use only in applications with reduced temperature requirements.

Q: What is the impact of lower slew rate in LMV324 series compared to MAX4234ASD+?

A: LMV324 series (1V/µs slew rate) is significantly slower than MAX4234ASD+ (10V/µs). This affects transient response and high-frequency signal handling. LMV324 is suitable only for low-speed, general-purpose applications. For applications requiring 10V/µs or higher slew rate, use MCP6024 series (7V/µs) or TLV2624ID (7V/µs).

Q: Are all substitute parts RoHS3 compliant?

A: No. LMV324MX is RoHS non-compliant. All other listed substitutes are ROHS3 compliant. Verify RoHS compliance requirements for your application before selection.

Q: What packaging options are available for MCP6024?

A: MCP6024-E/SL and MCP6024-I/SL are supplied in Tube packaging. MCP6024T-I/SL is supplied in Cut Tape (CT) & Digi-Reel® packaging. Select based on your procurement and assembly requirements.

Q: Is OPA4343UA suitable for the full -40°C to 125°C temperature range?

A: No. OPA4343UA operates only to 85°C maximum. It is unsuitable for applications requiring operation above 85°C. Use only in applications with maximum temperature ≤ 85°C.

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