MAX4125ESA Equivalent & Substitute Parts

Part Overview

The MAX4125ESA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This device features rail-to-rail output capability and is designed for applications requiring single-circuit amplification with moderate bandwidth and low input bias current. The MAX4125ESA is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain compatibility with the 8-SOIC package format and deliver equivalent electrical performance within the specified operating parameters.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	10	V/µs
Gain Bandwidth Product	25	MHz
Current - Input Bias	50	nA
Voltage - Input Offset	200	µV
Current - Supply	725	µA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	6.5	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MAX4125ESA are selected based on strict electrical and mechanical compatibility criteria. All substitute candidates must meet the following requirements:

Mandatory Compatibility Criteria:

Package format: 8-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Amplifier type: General Purpose
Number of circuits: 1
Output type: Rail-to-Rail
Moisture Sensitivity Level: 1 (Unlimited)

Electrical Performance Parameters: Substitutes are grouped by their ability to maintain or exceed the MAX4125ESA electrical specifications. The primary differentiators are slew rate (10 V/µs), gain bandwidth product (25 MHz), input bias current (50 nA), and supply current (725 µA). Parts are classified into two categories:

Direct Packaging Variants – Same manufacturer (Analog Devices), identical electrical specifications, different packaging (tube vs. tape & reel)
Cross-Manufacturer Alternatives – Different manufacturers with comparable or superior electrical performance, all in 8-SOIC package

Substitution Logic:

MAX4125ESA+ (Analog Devices) – Direct variant with active product status and RoHS3 compliance
MCP633-E/SN and MCP633T-E/SN (Microchip) – Comparable gain bandwidth (24 MHz), superior input bias current (4 pA), extended temperature range (-40 to 125°C), RoHS3 compliant
TLV2450 series (Texas Instruments) – Lower bandwidth (220 kHz), reduced supply current (23 µA), suitable for low-power applications
TLV2460 series (Texas Instruments) – Intermediate bandwidth (6.4 MHz), moderate supply current (550 µA), extended temperature range

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Temp Range (°C)	RoHS Status	Packaging
MAX4125ESA	Analog Devices	Obsolete	10	25	50	200	725	50	-40 to 85	Non-compliant	8-SOIC
MAX4125ESA+	Analog Devices	Active	10	25	50	200	725	—	-40 to 85	RoHS3	8-SOIC
MCP633-E/SN	Microchip	Active	10	24	0.004	1800	2500	—	-40 to 125	RoHS3	8-SOIC
MCP633T-E/SN	Microchip	Active	10	24	0.004	1800	2500	—	-40 to 125	RoHS3	8-SOIC
TLV2450AIDR	Texas Instruments	Active	0.11	0.22	0.5	300	23	10	-40 to 125	RoHS3	8-SOIC
TLV2450CD	Texas Instruments	Obsolete	0.11	0.22	0.5	300	23	10	0 to 70	RoHS3	8-SOIC
TLV2450ID	Texas Instruments	Active	0.11	0.22	0.5	300	23	10	-40 to 125	RoHS3	8-SOIC
TLV2460AIDR	Texas Instruments	Last Time Buy	1.6	6.4	0.0013	500	550	80	-40 to 125	RoHS3	8-SOIC
TLV2460CD	Texas Instruments	Active	1.6	6.4	0.0013	500	550	80	0 to 70	RoHS3	8-SOIC
TLV2460CDR	Texas Instruments	Active	1.6	6.4	0.0013	500	550	80	0 to 70	RoHS3	8-SOIC
TLV2460ID	Texas Instruments	Last Time Buy	1.6	6.4	0.0013	500	550	80	-40 to 125	RoHS3	8-SOIC

Engineering Selection Recommendations

Primary Recommendation: MAX4125ESA+

The MAX4125ESA+ is the direct successor to the MAX4125ESA, manufactured by Analog Devices. It provides identical electrical specifications (10 V/µs slew rate, 25 MHz gain bandwidth product, 50 nA input bias current) and maintains the same 8-SOIC package footprint. The MAX4125ESA+ holds active product status and carries RoHS3 compliance, addressing regulatory requirements for new designs. This part is the preferred choice for direct replacement in existing applications.

Secondary Recommendation: MCP633-E/SN or MCP633T-E/SN

The Microchip MCP633 series offers comparable performance with a 24 MHz gain bandwidth product and 10 V/µs slew rate. These parts feature superior input bias current (4 pA versus 50 nA) and extended operating temperature range (-40 to 125°C). Both MCP633-E/SN (tube packaging) and MCP633T-E/SN (tape & reel packaging) are active products with RoHS3 compliance. The MCP633 series is suitable for applications where lower input bias current and wider temperature operation provide design advantages.

Alternative Recommendation: TLV2460 Series

The Texas Instruments TLV2460 series (TLV2460AIDR, TLV2460CD, TLV2460CDR, TLV2460ID) provides moderate bandwidth (6.4 MHz) and reduced supply current (550 µA). These parts are active products with RoHS3 compliance and extended temperature range options. The TLV2460 series is applicable for applications where bandwidth requirements are lower than the MAX4125ESA specification and power consumption optimization is a design priority.

Not Recommended: TLV2450 Series

The Texas Instruments TLV2450 series exhibits significantly reduced bandwidth (220 kHz) and slew rate (0.11 V/µs) compared to the MAX4125ESA. While these parts are RoHS3 compliant and available in active product status, they are suitable only for low-frequency applications and do not provide equivalent performance for general-purpose amplification at the MAX4125ESA specification level.

Frequently Asked Questions (FAQ)

Q1: Can I use MAX4125ESA+ as a direct replacement for MAX4125ESA?

Yes. The MAX4125ESA+ is manufactured by the same company (Analog Devices) and provides identical electrical specifications. Both parts feature 10 V/µs slew rate, 25 MHz gain bandwidth product, 50 nA input bias current, and 8-SOIC package format. The primary difference is product status (MAX4125ESA+ is active) and RoHS compliance (MAX4125ESA+ is RoHS3 compliant). Pinout and electrical performance are equivalent.

Q2: What are the key differences between Analog Devices and Microchip substitutes?

The Microchip MCP633 series maintains comparable slew rate (10 V/µs) and gain bandwidth product (24 MHz) to the MAX4125ESA. The primary advantage is superior input bias current (4 pA versus 50 nA) and extended operating temperature range (-40 to 125°C versus -40 to 85°C). Both manufacturers' parts are housed in 8-SOIC packages and are RoHS3 compliant. Selection depends on whether the application requires lower input bias current or extended temperature operation.

Q3: Why is the TLV2450 series not recommended as a substitute?

The TLV2450 series exhibits significantly reduced bandwidth (220 kHz) and slew rate (0.11 V/µs) compared to the MAX4125ESA (25 MHz and 10 V/µs respectively). This represents a 100-fold reduction in bandwidth and a 90-fold reduction in slew rate. The TLV2450 is designed for low-frequency, low-power applications and does not provide equivalent performance for general-purpose amplification. Use the TLV2450 only if your application specifically requires ultra-low bandwidth and minimal power consumption.

Q4: What packaging options are available for substitute parts?

All substitute parts are available in 8-SOIC surface mount package format. Packaging variants differ in delivery method: tube packaging (standard reel for manual handling), tape & reel (TR) packaging (automated assembly), and bulk options. The electrical performance is identical across packaging variants. Select packaging based on assembly process requirements and volume.

Q5: Are all substitute parts RoHS3 compliant?

All recommended substitute parts (MAX4125ESA+, MCP633-E/SN, MCP633T-E/SN, TLV2460 series, and TLV2450 series) carry RoHS3 compliance. The original MAX4125ESA is RoHS non-compliant. For new designs and applications subject to RoHS regulations, use only RoHS3 compliant alternatives.

Q6: Which substitute part offers the lowest power consumption?

The TLV2450 series provides the lowest supply current at 23 µA, compared to 725 µA for the MAX4125ESA and 550 µA for the TLV2460 series. However, this reduction in power consumption comes with significantly reduced bandwidth (220 kHz). For applications requiring both low power and moderate bandwidth, the TLV2460 series (550 µA) offers a compromise between the MAX4125ESA and TLV2450 specifications.

Q7: Can I substitute a TLV2460 part for MAX4125ESA in a high-frequency application?

No. The TLV2460 series provides 6.4 MHz gain bandwidth product, which is 3.9 times lower than the MAX4125ESA (25 MHz). If your application requires the full 25 MHz bandwidth of the MAX4125ESA, use MAX4125ESA+, MCP633-E/SN, or MCP633T-E/SN. The TLV2460 is suitable only for applications where 6.4 MHz bandwidth is sufficient.

Q8: What is the temperature operating range for each substitute?

MAX4125ESA and MAX4125ESA+: -40 to 85°C. MCP633-E/SN and MCP633T-E/SN: -40 to 125°C. TLV2450AIDR and TLV2450ID: -40 to 125°C. TLV2450CD: 0 to 70°C. TLV2460AIDR and TLV2460ID: -40 to 125°C. TLV2460CD and TLV2460CDR: 0 to 70°C. Select parts with extended temperature range (-40 to 125°C) for applications requiring operation below 0°C or above 85°C.

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