MAX495ESA+ Equivalent & Substitute Parts Reference

Part Overview

The MAX495ESA+ is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for rail-to-rail applications in 8-SOIC surface mount packaging. This device is classified as obsolete, indicating discontinued production and limited availability in the market. The identification of equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this amplifier topology.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	0.2	V/µs
Gain Bandwidth Product	500	kHz
Current - Input Bias	25	nA
Voltage - Input Offset	200	µV
Current - Supply	150	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	6	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MAX495ESA+ is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Package compatibility: 8-SOIC (0.154", 3.90mm Width) surface mount only
Output configuration: Rail-to-rail output type required
Single circuit topology: One amplifier per package
Supply voltage range: Minimum 2.7 V to maximum 6 V overlap required
General-purpose amplifier classification

Acceptable Parameter Variations: Substitute parts may exceed the MAX495ESA+ specifications in slew rate, gain bandwidth product, input bias current, and output current capacity without compromising functionality. However, substitute parts must not fall below the minimum supply voltage (2.7 V) or exceed the maximum supply voltage (6 V) of the original device.

Temperature Range Consideration: The MAX495ESA+ operates from -40°C to 85°C. Substitute parts with extended temperature ranges (-40°C to 125°C) are acceptable for applications within the original temperature window.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating to ensure manufacturing and storage compatibility.

Parameter Comparison

Parameter	MAX495ESA+	MAX4091ASA+	TLV2461AID	TLV2461AIDR	TLV2461CD	TLV2461CDR	TLV2461ID	TLV2461IDR
Manufacturer	Analog Devices / Maxim	Analog Devices / Maxim	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Obsolete	Active	Active	Active	Obsolete	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.2	0.2	1.6	1.6	1.6	1.6	1.6	1.6
Gain Bandwidth Product (kHz)	500	500	6400	6400	6400	6400	6400	6400
Current - Input Bias (nA)	25	20	1.3	1.3	1.3	1.3	1.3	1.3
Voltage - Input Offset (µV)	200	30	500	500	500	500	500	500
Current - Supply (µA)	150	130	550	550	550	550	550	550
Current - Output / Channel (mA)	30	—	80	80	80	80	80	80
Voltage - Supply Span Min (V)	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7
Voltage - Supply Span Max (V)	6	6	6	6	6	6	6	6
Operating Temperature (°C)	-40 to 85	-40 to 125	-40 to 125	-40 to 125	0 to 70	0 to 70	-40 to 125	-40 to 125
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	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)

Engineering Selection Recommendations

Primary Recommendation: MAX4091ASA+

The MAX4091ASA+ is the direct equivalent substitute from Analog Devices Inc./Maxim Integrated. This part maintains identical electrical specifications to the MAX495ESA+ (0.2 V/µs slew rate, 500 kHz gain bandwidth product) while offering active product status and extended operating temperature range (-40°C to 125°C). The MAX4091ASA+ is packaged in 8-SOIC with tube packaging and maintains full ROHS3 compliance and MSL 1 rating. Current inventory of 1099 pieces supports immediate availability.

Secondary Recommendations: TLV2461 Series (Texas Instruments)

The TLV2461 series from Texas Instruments provides functional substitution with enhanced electrical performance characteristics. All TLV2461 variants meet the core substitution criteria: 8-SOIC package, rail-to-rail output, single circuit topology, and 2.7 V to 6 V supply voltage range.

TLV2461AIDR (Recommended for Active Production): Active product status, tape and reel packaging, -40°C to 125°C operating temperature, 2000 pieces in stock. Enhanced specifications include 1.6 V/µs slew rate and 6.4 MHz gain bandwidth product.

TLV2461IDR (Extended Temperature Range): Active product status, tape and reel packaging, -40°C to 125°C operating temperature, 2000 pieces in stock. Identical electrical specifications to TLV2461AIDR.

TLV2461CD (Commercial Temperature Range): Active product status, tube packaging, 0°C to 70°C operating temperature, 1131 pieces in stock. Suitable for applications not requiring extended low-temperature operation.

TLV2461CDR (Commercial Temperature Range, Tape & Reel): Active product status, tape and reel packaging, 0°C to 70°C operating temperature, 2200 pieces in stock.

Obsolete Alternatives (Not Recommended for New Designs):

TLV2461AID and TLV2461ID are classified as obsolete and should not be selected for new production designs despite current inventory availability.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with existing manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q1: Can the MAX4091ASA+ directly replace the MAX495ESA+ without circuit modifications?

A: Yes. The MAX4091ASA+ maintains identical electrical specifications (0.2 V/µs slew rate, 500 kHz gain bandwidth product, 2.7 V to 6 V supply range) and identical 8-SOIC package geometry. No circuit modifications are required.

Q2: What are the key differences between the MAX495ESA+ and TLV2461 series substitutes?

A: The TLV2461 series offers enhanced performance with 1.6 V/µs slew rate (8× faster) and 6.4 MHz gain bandwidth product (12.8× higher). Input bias current is significantly lower (1.3 nA versus 25 nA). These enhancements are backward compatible and do not require circuit redesign. Supply voltage range and package remain identical.

Q3: Which TLV2461 variant should be selected for new production?

A: TLV2461AIDR is recommended for new production designs. This part offers active product status, extended operating temperature range (-40°C to 125°C), tape and reel packaging for automated assembly, and 2000 pieces current inventory.

Q4: Are there temperature range limitations when substituting with TLV2461CD or TLV2461CDR?

A: Yes. TLV2461CD and TLV2461CDR operate from 0°C to 70°C, which is narrower than the MAX495ESA+ range (-40°C to 85°C). These variants are suitable only for applications operating within the 0°C to 70°C window.

Q5: What is the significance of packaging type (tube versus tape and reel)?

A: Tube packaging is suitable for manual assembly and small-volume production. Tape and reel packaging is required for automated pick-and-place assembly in high-volume manufacturing. Both packaging types contain identical die and electrical specifications.

Q6: Do all substitute parts maintain the same moisture sensitivity level?

A: Yes. All recommended substitutes maintain MSL 1 (Unlimited) rating, identical to the MAX495ESA+. This ensures compatibility with standard storage and handling procedures without requiring additional moisture control measures.

Q7: Why is the MAX495ESA+ classified as obsolete?

A: Obsolete classification indicates that the manufacturer has discontinued production. The MAX4091ASA+ and TLV2461 series represent active alternatives that provide equivalent or enhanced functionality while ensuring ongoing supply chain availability.

Q8: Can TLV2461 parts be used in applications requiring the exact 500 kHz gain bandwidth product specification?

A: TLV2461 parts exceed this specification with 6.4 MHz gain bandwidth product. For applications with strict bandwidth limitations, the MAX4091ASA+ maintains the original 500 kHz specification. However, higher bandwidth does not degrade performance in applications designed for lower bandwidth devices.

Q9: What is the impact of lower input bias current in TLV2461 substitutes?

A: Lower input bias current (1.3 nA versus 25 nA) reduces input offset current effects and improves performance in high-impedance input circuits. This enhancement is beneficial and does not require circuit modifications.

Q10: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance, ensuring compatibility with environmental regulations and manufacturing standards applicable to the MAX495ESA+.

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