MAX4437EUA+ Equivalent & Substitute Parts

Part Overview

The MAX4437EUA+ is a general purpose operational amplifier featuring dual circuits in an 8-uMAX/uSOP surface mount package, manufactured by Analog Devices Inc./Maxim Integrated. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The MAX4437EUA+ delivers 388V/µs slew rate and 150 MHz bandwidth, operating across a 4.5V to 5.5V supply span with dual-channel configuration suitable for general purpose amplification applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	388	V/µs
-3dB Bandwidth	150	MHz
Current - Input Bias	14	µA
Voltage - Input Offset	1	mV
Current - Supply (x2 Channels)	15	mA
Current - Output / Channel	65	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MAX4437EUA+ is determined by the following critical parameters: dual-circuit configuration, surface mount packaging in 8-pin TSSOP/MSOP form factor, supply voltage compatibility within the 4.5V to 5.5V range, and functional performance metrics including slew rate, bandwidth, and output current capability.

The substitute parts are grouped into two categories based on their electrical characteristics and application suitability:

Category 1: CMOS Low-Power Alternatives — LMV832MM/NOPB, OPA2301AIDGKT, and S-19610AB0A-K8T2U. These devices feature CMOS amplifier architecture with significantly reduced supply current consumption and extended operating temperature ranges. They maintain dual-circuit configuration and compatible surface mount packaging.

Category 2: High-Performance Voltage Feedback Alternative — THS4222DGN. This device features voltage feedback architecture with rail-to-rail output capability, higher slew rate (990V/µs), and extended supply voltage range (2.7V to 15V), while maintaining dual-circuit configuration and compatible packaging.

All substitute parts comply with ROHS3 and maintain surface mount compatibility with 8-pin TSSOP/MSOP packages.

Parameter Comparison

Parameter	MAX4437EUA+	LMV832MM/NOPB	OPA2301AIDGKT	S-19610AB0A-K8T2U	THS4222DGN
Amplifier Type	General Purpose	CMOS	CMOS	CMOS	Voltage Feedback
Number of Circuits	2	2	2	2	2
Slew Rate (V/µs)	388	2	80	2	990
Bandwidth (MHz)	150	3.3	150	3	230
Current - Input Bias	14 µA	0.1 pA	0.1 pA	1 pA	900 nA
Voltage - Input Offset	1 mV	250 µV	1 mV	3 mV	3 mV
Current - Supply (x2 Channels)	15 mA	470 µA	9.5 mA	2 mA	14 mA
Current - Output / Channel	65 mA	66 mA	70 mA	5 mA	100 mA
Voltage - Supply Span (Min)	4.5 V	2.7 V	2.7 V	2.7 V	2.7 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.5 V	5.5 V	15 V
Operating Temperature	-40 to 85°C	-40 to 125°C	-40 to 125°C	-40 to 125°C	-40 to 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-WSSOP, 8-MSOP (0.110", 2.80mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

OPA2301AIDGKT (Texas Instruments) — This substitute provides the closest electrical performance match to the MAX4437EUA+, with identical 150 MHz bandwidth and 1 mV input offset voltage. The OPA2301AIDGKT maintains active product status, ROHS3 compliance, and operates within the required supply voltage range. The 80V/µs slew rate is lower than the original but sufficient for general purpose applications. This device is recommended for direct replacement in applications where bandwidth and input offset characteristics are critical.

THS4222DGN (Texas Instruments) — This substitute offers enhanced performance with 990V/µs slew rate and 230 MHz bandwidth, exceeding the original specifications. Rail-to-rail output capability and extended supply voltage range (2.7V to 15V) provide design flexibility. The THS4222DGN is suitable for applications requiring higher performance margins or broader supply voltage compatibility. Active product status and ROHS3 compliance are confirmed.

LMV832MM/NOPB (National Semiconductor) — This substitute is appropriate for applications where ultra-low supply current consumption is prioritized. The 470µA total supply current represents a 97% reduction compared to the MAX4437EUA+. However, the 3.3 MHz bandwidth and 2V/µs slew rate are significantly lower and suitable only for low-frequency signal conditioning applications.

S-19610AB0A-K8T2U (ABLIC Inc.) — This substitute is suitable for ultra-low-power applications with 2 mA total supply current consumption. The 3 MHz bandwidth and 2V/µs slew rate limit applicability to low-frequency circuits. Package dimensions (0.110" width) differ slightly from the original, requiring PCB layout verification. Active product status and ROHS3 compliance are confirmed.

Frequently Asked Questions (FAQ)

Q: Can the OPA2301AIDGKT directly replace the MAX4437EUA+ without circuit modifications?

A: The OPA2301AIDGKT maintains identical bandwidth (150 MHz), matching input offset voltage (1 mV), and compatible supply voltage range (2.7V to 5.5V). Surface mount packaging is identical (8-TSSOP/MSOP, 0.118" width). Direct substitution is supported for applications operating within the 4.5V to 5.5V supply range. Output current capability (70 mA) exceeds the original (65 mA), providing additional design margin.

Q: What are the key differences between the CMOS alternatives and the original MAX4437EUA+?

A: The CMOS alternatives (LMV832MM/NOPB, OPA2301AIDGKT, S-19610AB0A-K8T2U) feature significantly lower input bias current (0.1 pA to 1 pA versus 14 µA) and reduced supply current consumption. However, LMV832MM/NOPB and S-19610AB0A-K8T2U exhibit substantially lower bandwidth (3 to 3.3 MHz) and slew rate (2V/µs), limiting their use to low-frequency applications. OPA2301AIDGKT maintains comparable bandwidth performance.

Q: Is the THS4222DGN suitable for all MAX4437EUA+ applications?

A: The THS4222DGN exceeds original specifications in slew rate (990V/µs versus 388V/µs) and bandwidth (230 MHz versus 150 MHz). Extended supply voltage range (2.7V to 15V) provides broader compatibility. However, higher performance characteristics may introduce increased noise or power consumption in applications not requiring enhanced specifications. Verification of circuit stability and thermal performance is necessary for high-frequency applications.

Q: What packaging considerations apply to the S-19610AB0A-K8T2U substitute?

A: The S-19610AB0A-K8T2U uses 8-WSSOP/8-MSOP packaging with 0.110" width, compared to the original 0.118" width. This 0.008" dimensional difference requires PCB layout verification to confirm pad spacing and trace routing compatibility. Pin configuration remains identical across all substitutes.

Q: Are all substitute parts RoHS3 compliant?

A: OPA2301AIDGKT, S-19610AB0A-K8T2U, and THS4222DGN are confirmed ROHS3 compliant. LMV832MM/NOPB RoHS status is not specified in available documentation. Verification with the supplier is recommended for applications with mandatory RoHS3 compliance requirements.

Q: Which substitute is recommended for battery-powered applications?

A: S-19610AB0A-K8T2U offers the lowest supply current consumption (2 mA total for dual channels), making it optimal for battery-powered designs. However, the 3 MHz bandwidth and 2V/µs slew rate restrict applicability to low-frequency signal conditioning. For applications requiring higher bandwidth with reduced power consumption, LMV832MM/NOPB (470 µA) provides a compromise between performance and power efficiency.

Q: Can substitutes be used interchangeably in the same PCB design?

A: All substitutes maintain identical pin configuration and 8-pin TSSOP/MSOP surface mount packaging (with minor dimensional variation for S-19610AB0A-K8T2U). However, electrical performance differences require circuit analysis to confirm suitability. Applications sensitive to bandwidth, slew rate, or supply current must be individually evaluated. Thermal and stability analysis is necessary for high-frequency designs using THS4222DGN.

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