MAX4166ESA-T Equivalent & Substitute Parts

Part Overview

The MAX4166ESA-T 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 single-circuit amplification applications requiring low input bias current and moderate bandwidth performance.

The MAX4166ESA-T carries an Obsolete product status. Locating equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	2	V/µs
Gain Bandwidth Product	5	MHz
Current - Input Bias	50	nA
Voltage - Input Offset	250	µV
Current - Supply	1.3	mA
Current - Output / Channel	125	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	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4166ESA-T is determined by strict alignment with the following critical parameters:

Mandatory Compatibility Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Voltage - Supply Span (Min): ≥ 2.7 V
Voltage - Supply Span (Max): ≥ 6.5 V
Operating Temperature Range: Must encompass or exceed -40°C to 85°C

Performance Parameters (Secondary Consideration):

Slew Rate: 2 V/µs (baseline)
Gain Bandwidth Product: 5 MHz (baseline)
Current - Input Bias: 50 nA (baseline)
Voltage - Input Offset: 250 µV (baseline)
Current - Supply: 1.3 mA (baseline)
Current - Output / Channel: 125 mA (baseline)

Substitute parts are grouped into two categories:

Category 1: Direct Functional Equivalents Parts that maintain identical or superior electrical performance within the specified parameter ranges, ensuring drop-in replacement capability.

Category 2: Compatible Alternatives Parts that meet all mandatory compatibility criteria but exhibit different performance characteristics in secondary parameters. These parts are electrically compatible but may require application-level verification for performance-critical circuits.

Parameter Comparison

Parameter	MAX4166ESA-T	MAX4166ESA+T	OPA373AID	OPA373AIDR	TLV2450AIDR	TLV2450CD	TLV2450ID	TLV2460AIDR	TLV2460CD	TLV2460CDR	TLV2460ID
Manufacturer	Analog Devices / Maxim	Analog Devices / Maxim	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Obsolete	Active	Last Time Buy	Active	Active	Last Time Buy
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	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	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	2	2	5	5	0.11	0.11	0.11	1.6	1.6	1.6	1.6
Gain Bandwidth Product (MHz)	5	5	6.5	6.5	0.22	0.22	0.22	6.4	6.4	6.4	6.4
Current - Input Bias (nA)	50	50	0.0005	0.0005	0.5	0.5	0.5	0.0013	0.0013	0.0013	0.0013
Voltage - Input Offset (µV)	250	250	1000	1000	300	300	300	500	500	500	500
Current - Supply (µA)	1300	1300	585	585	23	23	23	550	550	550	550
Current - Output / Channel (mA)	125	125	—	—	10	10	10	80	80	80	80
Voltage - Supply Span Min (V)	2.7	2.7	2.3	2.3	2.7	2.7	2.7	2.7	2.7	2.7	2.7
Voltage - Supply Span Max (V)	6.5	6.5	5.5	5.5	6	6	6	6	6	6	6
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	0 to 70	-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	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	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Tier 1: Direct Replacement (Highest Compatibility)

MAX4166ESA+T is the recommended primary substitute. This part is manufactured by the same supplier (Analog Devices Inc./Maxim Integrated) and maintains identical electrical specifications across all parameters. The only distinction is product status: MAX4166ESA+T is Active, whereas MAX4166ESA-T is Obsolete. This part provides seamless drop-in replacement capability with no circuit redesign required. Inventory availability is significantly higher (50,100 units in stock versus 1,138 units for the original part).

Tier 2: High-Performance Alternatives (Enhanced Specifications)

OPA373AID and OPA373AIDR (Texas Instruments) offer superior electrical performance with higher slew rate (5 V/µs versus 2 V/µs), increased gain bandwidth product (6.5 MHz versus 5 MHz), and significantly lower input bias current (0.5 pA versus 50 nA). Both parts maintain 8-SOIC packaging and rail-to-rail output capability. OPA373AIDR is supplied in Tape & Reel format with Active product status. OPA373AID is supplied in Tube format with Active product status. Extended operating temperature range (-40°C to 125°C) exceeds the original specification. Supply voltage maximum is 5.5 V, which is below the original 6.5 V specification; this constraint must be evaluated for applications requiring higher supply voltages.

Tier 3: Low-Power Alternatives (Reduced Supply Current)

TLV2450AIDR, TLV2450CD, and TLV2450ID (Texas Instruments) are characterized by significantly reduced supply current (23 µA versus 1.3 mA), making them suitable for battery-powered or low-power applications. These parts maintain 8-SOIC packaging and rail-to-Rail output capability. However, slew rate is substantially reduced (0.11 V/µs versus 2 V/µs) and gain bandwidth product is significantly lower (220 kHz versus 5 MHz). Output current per channel is limited to 10 mA versus 125 mA. TLV2450AIDR is Active with extended temperature range (-40°C to 125°C). TLV2450CD is Obsolete with standard temperature range (0°C to 70°C). TLV2450ID is Active with extended temperature range (-40°C to 125°C). These parts are suitable only for applications where bandwidth and slew rate requirements are minimal.

Tier 4: Balanced-Performance Alternatives (Moderate Specifications)

TLV2460AIDR, TLV2460CD, TLV2460CDR, and TLV2460ID (Texas Instruments) provide intermediate performance characteristics. Slew rate is 1.6 V/µs (below original 2 V/µs) and gain bandwidth product is 6.4 MHz (above original 5 MHz). Supply current is 550 µA (below original 1.3 mA). Output current per channel is 80 mA (below original 125 mA). All parts maintain 8-SOIC packaging and rail-to-rail output capability. TLV2460AIDR and TLV2460ID carry Last Time Buy status, indicating limited future availability. TLV2460CD and TLV2460CDR are Active. Temperature range varies: TLV2460AIDR and TLV2460ID support -40°C to 125°C; TLV2460CD and TLV2460CDR support 0°C to 70°C.

Compliance and Regulatory Considerations

All substitute parts listed are ROHS3 Compliant and carry EAR99 ECCN classification, matching the original part's regulatory status. Moisture Sensitivity Level varies: MAX4166ESA+T, TLV2450 series, and TLV2460 series are MSL 1 (Unlimited); OPA373 series is MSL 2 (1 Year). MSL 2 classification requires controlled storage and handling procedures within one year of manufacture.

Frequently Asked Questions (FAQ)

Q1: Can MAX4166ESA+T be used as a direct replacement for MAX4166ESA-T?

A: Yes. MAX4166ESA+T is manufactured by the same supplier and maintains identical electrical specifications. The part is electrically and mechanically compatible for direct substitution. The primary difference is product status: MAX4166ESA+T is Active, ensuring long-term availability, whereas MAX4166ESA-T is Obsolete.

Q2: What are the key differences between OPA373AIDR and the original MAX4166ESA-T?

A: OPA373AIDR offers superior performance in slew rate (5 V/µs versus 2 V/µs), gain bandwidth product (6.5 MHz versus 5 MHz), and input bias current (0.5 pA versus 50 nA). Operating temperature range is extended to -40°C to 125°C. However, maximum supply voltage is 5.5 V, which is lower than the original 6.5 V specification. This constraint must be evaluated for applications requiring higher supply voltages.

Q3: Are TLV2450 series parts suitable replacements for high-speed applications?

A: No. TLV2450 series parts are optimized for low-power operation with significantly reduced bandwidth (220 kHz versus 5 MHz) and slew rate (0.11 V/µs versus 2 V/µs). These parts are suitable only for applications where bandwidth and slew rate requirements are minimal, such as sensor signal conditioning or low-frequency filtering.

Q4: What is the significance of "Last Time Buy" status for TLV2460AIDR and TLV2460ID?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life for these parts. Existing inventory will be sold until depletion, after which the parts will no longer be available. For new designs or long-term production requirements, Active status parts (TLV2460CD or TLV2460CDR) are recommended.

Q5: How does Moisture Sensitivity Level (MSL) affect component handling?

A: MSL 1 (Unlimited) parts, such as MAX4166ESA+T and TLV2450/TLV2460 series, have no moisture-related storage restrictions. MSL 2 (1 Year) parts, such as OPA373 series, must be stored in controlled humidity environments and used within one year of manufacture. Exceeding the MSL window requires baking procedures before assembly.

Q6: Can OPA373AIDR be used in applications requiring 6.5 V supply voltage?

A: No. OPA373AIDR maximum supply voltage is 5.5 V. Applications requiring 6.5 V supply voltage must use MAX4166ESA+T or TLV2450/TLV2460 series parts, which support the full 6.5 V specification.

Q7: What is the primary advantage of TLV2460 series over MAX4166ESA-T?

A: TLV2460 series offers reduced supply current (550 µA versus 1.3 mA), making it suitable for power-constrained applications. Gain bandwidth product is comparable (6.4 MHz versus 5 MHz). However, slew rate is slightly reduced (1.6 V/µs versus 2 V/µs) and output current per channel is lower (80 mA versus 125 mA).

Q8: Are all substitute parts available in 8-SOIC packaging?

A: Yes. All substitute parts listed are available in 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical compatibility with existing PCB layouts.

Q9: Which substitute part offers the best overall performance match to MAX4166ESA-T?

A: MAX4166ESA+T provides the closest performance match with identical electrical specifications. For applications where enhanced performance is acceptable, OPA373AIDR offers superior slew rate and bandwidth, provided the 5.5 V maximum supply voltage constraint is compatible with the application.

Q10: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tube (standard packaging for manual assembly), Tape & Reel (TR) format (for automated assembly), and in some cases, unspecified packaging. Selection should align with manufacturing process requirements and assembly equipment capabilities.

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