MAX495CSA+ Equivalent & Substitute Parts

Part Overview

The MAX495CSA+ 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
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	6	V
Operating Temperature	0 to 70	°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 MAX495CSA+ 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 operation required
Single circuit topology: One amplifier per package
Supply voltage range: Minimum 2.7 V to maximum 6 V
General-purpose amplifier classification

Acceptable Parameter Variations: Substitute parts may exceed the MAX495CSA+ specifications in the following parameters without affecting functional compatibility:

Slew rate (higher values acceptable)
Gain bandwidth product (higher values acceptable)
Input bias current (lower values acceptable)
Input offset voltage (lower values acceptable)
Supply current (lower values acceptable)
Operating temperature range (wider ranges acceptable)

Non-Negotiable Parameters:

Package type and physical dimensions
Rail-to-rail output capability
Supply voltage span overlap with 2.7 V to 6 V range
Single circuit configuration

Parameter Comparison

Parameter	MAX495CSA+	MAX4091ASA+	TLV2461AID	TLV2461AIDR	TLV2461CD	TLV2461CDR	TLV2461IDR
Manufacturer	Analog Devices/Maxim	Analog Devices/Maxim	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1
Output Type	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
Gain Bandwidth Product (kHz)	500	500	6400	6400	6400	6400	6400
Current - Input Bias (nA)	25	20	1.3	1.3	1.3	1.3	1.3
Voltage - Input Offset (µV)	200	30	500	500	500	500	500
Current - Supply (µA)	150	130	550	550	550	550	550
Voltage - Supply Span (V)	2.7 to 6	2.7 to 6	2.7 to 6	2.7 to 6	2.7 to 6	2.7 to 6	2.7 to 6
Operating Temperature (°C)	0 to 70	-40 to 125	-40 to 125	-40 to 125	0 to 70	0 to 70	-40 to 125
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Obsolete	Active	Active	Active	Active
RoHS Status	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)

Engineering Selection Recommendations

Primary Recommendation: MAX4091ASA+

The MAX4091ASA+ from Analog Devices Inc./Maxim Integrated is the direct functional equivalent with active product status. This device maintains identical electrical specifications (slew rate 0.2 V/µs, gain bandwidth product 500 kHz) and supply voltage range (2.7 V to 6 V) as the MAX495CSA+. The MAX4091ASA+ offers superior input bias current (20 nA versus 25 nA) and input offset voltage (30 µV versus 200 µV), providing enhanced performance characteristics. Extended operating temperature range (-40°C to 125°C) accommodates broader application requirements. ROHS3 compliance and MSL 1 rating match the original specification. Current inventory of 1099 units supports immediate procurement.

Secondary Recommendation: TLV2461AIDR or TLV2461IDR

The TLV2461AIDR and TLV2461IDR from Texas Instruments provide functional substitution with active product status and extended temperature range (-40°C to 125°C). These devices maintain the required 8-SOIC package and rail-to-rail output configuration. Enhanced performance specifications include slew rate of 1.6 V/µs and gain bandwidth product of 6.4 MHz, representing significant improvements over the MAX495CSA+. Supply voltage range (2.7 V to 6 V) remains compatible. Higher supply current (550 µA versus 150 µA) requires circuit design verification. ROHS3 compliance and MSL 1 rating are maintained. TLV2461AIDR is available in Tape & Reel packaging with 2777 units in stock; TLV2461IDR offers 2000 units.

Tertiary Recommendation: TLV2461CD or TLV2461CDR

The TLV2461CD and TLV2461CDR from Texas Instruments serve as substitutes for applications with operating temperature requirements limited to 0°C to 70°C, matching the MAX495CSA+ temperature specification. These devices provide identical electrical performance to the TLV2461AIDR variant with active product status. TLV2461CD is available in Tube packaging (1131 units); TLV2461CDR is available in Tape & Reel packaging (2200 units). ROHS3 compliance and MSL 1 rating are maintained.

Compliance and Certification Status:

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with existing supply chain and manufacturing processes. REACH unaffected status and EAR99 ECCN classification are consistent across all alternatives. HTSUS code 8542.33.0001 applies uniformly to all devices.

Frequently Asked Questions (FAQ)

Q1: Can the MAX495CSA+ be directly replaced with the MAX4091ASA+ without circuit modifications?

A: The MAX4091ASA+ maintains identical electrical specifications for slew rate, gain bandwidth product, and supply voltage range as the MAX495CSA+. Both devices feature rail-to-rail output in 8-SOIC packaging. Direct substitution is supported from an electrical standpoint. Physical pin configuration and package dimensions are identical. No circuit modifications are required.

Q2: What is the primary difference between MAX4091ASA+ and TLV2461 series devices?

A: The MAX4091ASA+ maintains the original MAX495CSA+ performance envelope with slew rate of 0.2 V/µs and gain bandwidth product of 500 kHz. The TLV2461 series from Texas Instruments provides enhanced performance with slew rate of 1.6 V/µs and gain bandwidth product of 6.4 MHz. The TLV2461 series exhibits higher supply current consumption (550 µA versus 130 µA for MAX4091ASA+). Selection depends on application bandwidth requirements and power budget constraints.

Q3: Are there packaging differences between TLV2461AIDR, TLV2461CD, and TLV2461CDR?

A: TLV2461AIDR is supplied in Tape & Reel (TR) packaging. TLV2461CD is supplied in Tube packaging. TLV2461CDR is supplied in Tape & Reel (TR) packaging. All three variants use identical 8-SOIC (0.154", 3.90mm Width) package geometry. Packaging selection depends on assembly process requirements and volume considerations. Electrical specifications are identical across all three variants within their respective temperature grades.

Q4: What is the significance of product status (Active versus Obsolete) in substitution selection?

A: Active product status indicates ongoing manufacturing and long-term availability from the manufacturer. Obsolete status indicates discontinued production with limited remaining inventory. For the MAX495CSA+ (obsolete status with 12700 units in stock), substitution with active-status devices ensures long-term supply chain continuity. MAX4091ASA+ (active status, 1099 units) and TLV2461 series devices (active status, 1131 to 2777 units) provide sustainable alternatives for future production requirements.

Q5: Can TLV2461 devices be used in applications requiring 0°C to 70°C operating temperature?

A: TLV2461CD and TLV2461CDR are rated for 0°C to 70°C operating temperature, matching the MAX495CSA+ specification. TLV2461AID, TLV2461AIDR, and TLV2461IDR are rated for -40°C to 125°C, providing extended temperature capability. Selection of the appropriate temperature-rated variant depends on application requirements. Devices rated for extended temperature ranges (-40°C to 125°C) are suitable for applications requiring only 0°C to 70°C operation.

Q6: What are the compliance implications of substituting the MAX495CSA+ with alternative devices?

A: All recommended substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, REACH unaffected status, and EAR99 ECCN classification. These certifications are consistent with the MAX495CSA+ original specification. Substitution does not introduce compliance risks or require regulatory re-qualification. Manufacturing processes and supply chain documentation require update to reflect part number changes.

Q7: How does input bias current variation affect circuit design when substituting the MAX495CSA+?

A: The MAX495CSA+ specifies 25 nA input bias current. MAX4091ASA+ specifies 20 nA, and TLV2461 series devices specify 1.3 nA. Lower input bias current reduces offset errors in high-impedance input circuits and decreases input stage power dissipation. For applications with input impedances below 1 MΩ, input bias current variation has negligible impact on circuit performance. High-impedance applications (>10 MΩ) benefit from the reduced input bias current of TLV2461 devices.

Q8: What supply current increase occurs when substituting MAX495CSA+ with TLV2461 series devices?

A: The MAX495CSA+ specifies 150 µA supply current. TLV2461 series devices specify 550 µA supply current, representing a 3.67× increase. This increased current consumption requires verification of power supply capacity and thermal management in the application circuit. Battery-powered applications may experience reduced operating time. AC-powered applications require confirmation that power supply current rating accommodates the increased device current draw.

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