MAX4492ASD Equivalent & Substitute Parts

Part Overview

The MAX4492ASD is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface-mount package. Manufactured by Analog Devices Inc./Maxim Integrated, this device provides push-pull, rail-to-rail output capability with a 10 MHz gain-bandwidth product and 10 V/µs slew rate. The part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across supply voltage, output characteristics, and thermal operating range while accommodating packaging and compliance variations.

Key Parameters

Parameter	MAX4492ASD	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	Channels
Output Type	Push-Pull, Rail-to-Rail	—
Slew Rate	10	V/µs
Gain Bandwidth Product	10	MHz
Current - Input Bias	50	pA
Voltage - Input Offset	1.5	mV
Current - Supply (x4 Channels)	800	µA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MAX4492ASD is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

Four independent operational amplifier circuits in single package
Rail-to-rail output capability
14-SOIC surface-mount package (0.154" width, 3.90mm)
Supply voltage range compatibility: minimum 2.7 V, maximum 5.5 V
Operating temperature range: -40°C to 125°C
Output current per channel: minimum 28 mA (acceptable for 50 mA specification)
Slew rate: minimum 10 V/µs (acceptable for 10 V/µs specification)

Secondary Compatibility Parameters:

Input bias current: lower values acceptable (improved performance)
Input offset voltage: lower values acceptable (improved performance)
Supply current: values within ±25% of 800 µA acceptable
Gain-bandwidth product: values within ±50% of 10 MHz acceptable

Substitutes are grouped by product status (active vs. last-time-buy) and compliance certifications (RoHS3, AEC-Q100 automotive qualification).

Parameter Comparison

Parameter	MAX4492ASD	MAX4492ASD+	OPA4343UA	OPA4343UA/2K5	TLV2634ID	TSV994IDT	TSV994IYDT	Unit
Amplifier Type	General Purpose	General Purpose	CMOS	CMOS	General Purpose	General Purpose	General Purpose	—
Number of Circuits	4	4	4	4	4	4	4	Channels
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	—
Slew Rate	10	10	6	6	10	10	10	V/µs
Gain Bandwidth Product	10	10	5.5	5.5	9	20	20	MHz
Current - Input Bias	50	50	0.2	0.2	0.7	1	1	pA
Voltage - Input Offset	1.5	1.5	2	2	1.1	0.1	0.1	mV
Current - Supply (x4 Channels)	800	800	850	850	3800	820	820	µA
Current - Output / Channel	50	50	50	50	28	35	35	mA
Voltage - Supply Span (Min)	2.7	2.7	2.5	2.5	2.7	2.5	2.5	V
Voltage - Supply Span (Max)	5.5	5.5	5.5	5.5	5.5	5.5	5.5	V
Operating Temperature	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SO	14-SO	—
Product Status	Obsolete	Active	Active	Active	Last Time Buy	Active	Active	—
RoHS Status	Non-compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—
AEC-Q100 Automotive	No	No	No	No	No	Yes	Yes	—

Engineering Selection Recommendations

MAX4492ASD+ (Analog Devices Inc./Maxim Integrated)

Direct successor to the MAX4492ASD with identical electrical specifications. Maintains 10 V/µs slew rate, 10 MHz gain-bandwidth product, and 50 mA output current per channel. Differs only in packaging format (tube vs. unspecified original) and product status (active vs. obsolete). RoHS3 compliant. Recommended as primary replacement for existing MAX4492ASD designs requiring continued production support.

TSV994IDT and TSV994IYDT (STMicroelectronics)

Active products with enhanced performance characteristics: 20 MHz gain-bandwidth product (2× improvement), 100 µV input offset voltage (15× improvement), and 1 pA input bias current (50× improvement). Maintain 10 V/µs slew rate and -40°C to 125°C operating range. Output current per channel reduced to 35 mA (70% of MAX4492ASD). AEC-Q100 automotive qualification and RoHS3 compliance. Suitable for applications requiring improved precision and automotive-grade reliability. Packaging variants: TSV994IDT (Cut Tape & Digi-Reel), TSV994IYDT (Tape & Reel).

TLV2634ID (Texas Instruments)

General-purpose amplifier with 10 V/µs slew rate and 9 MHz gain-bandwidth product. Last-time-buy status indicates limited future availability. Supply current significantly elevated at 3.8 mA (4.75× higher than MAX4492ASD), resulting in higher power dissipation. Output current per channel 28 mA (56% of MAX4492ASD). RoHS3 compliant. Acceptable for low-speed applications with extended temperature range (-40°C to 125°C) where power consumption is not critical.

OPA4343UA and OPA4343UA/2K5 (Burr Brown / Texas Instruments)

CMOS amplifier architecture with ultra-low input bias current (0.2 pA, 250× improvement). Slew rate reduced to 6 V/µs and gain-bandwidth product to 5.5 MHz. Operating temperature limited to -40°C to 85°C (40°C reduction from MAX4492ASD). Output current per channel maintained at 50 mA. OPA4343UA/2K5 carries RoHS3 compliance. Suitable for precision, low-power applications where extended temperature operation is not required.

Frequently Asked Questions (FAQ)

Q: Can MAX4492ASD+ be used as a direct drop-in replacement?

A: Yes. MAX4492ASD+ maintains identical electrical specifications (10 V/µs slew rate, 10 MHz gain-bandwidth product, 50 mA output current, -40°C to 125°C operating range) and 14-SOIC package footprint. The only difference is product status (active vs. obsolete) and packaging format. No circuit modifications required.

Q: What is the key difference between TSV994 variants (IDT vs. IYDT)?

A: Both TSV994IDT and TSV994IYDT share identical electrical specifications. The difference is packaging format: TSV994IDT is supplied in Cut Tape & Digi-Reel format, while TSV994IYDT is supplied in Tape & Reel format. Selection depends on assembly line requirements and tape specifications.

Q: Why does TLV2634ID have higher supply current than MAX4492ASD?

A: TLV2634ID supply current is 3.8 mA (total for four channels), compared to 800 µA for MAX4492ASD. This 4.75× increase reflects different circuit topology and design optimization priorities. Applications sensitive to power dissipation should account for this difference.

Q: Can OPA4343UA operate at 125°C like MAX4492ASD?

A: No. OPA4343UA and OPA4343UA/2K5 are specified for -40°C to 85°C operating range only. Applications requiring 125°C maximum temperature operation must use MAX4492ASD+, TLV2634ID, TSV994IDT, or TSV994IYDT.

Q: What does AEC-Q100 qualification mean for TSV994 parts?

A: AEC-Q100 is an automotive industry qualification standard. TSV994IDT and TSV994IYDT carry this certification, indicating suitability for automotive applications with defined reliability and quality requirements. Non-automotive applications do not require this qualification.

Q: Is RoHS3 compliance mandatory for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other markets. MAX4492ASD is RoHS non-compliant. All substitute parts except OPA4343UA (compliance not specified) carry RoHS3 certification. Verify regulatory requirements for your target market.

Q: What is the significance of the 14-SO vs. 14-SOIC package designation?

A: Both 14-SO and 14-SOIC refer to 14-pin surface-mount packages with 0.154" (3.90mm) width. The designations are manufacturer-specific nomenclature (STMicroelectronics uses 14-SO; Analog Devices uses 14-SOIC). Footprints are mechanically and electrically compatible for PCB assembly.

Q: Can I substitute TSV994 for MAX4492ASD if output current requirement is 35 mA?

A: Yes. TSV994IDT and TSV994IYDT provide 35 mA output current per channel, which meets applications requiring up to 35 mA. If your design requires the full 50 mA output current of MAX4492ASD, TSV994 variants are not suitable.

Q: Why is OPA4343UA recommended only for non-extended-temperature applications?

A: OPA4343UA maximum operating temperature is 85°C, compared to 125°C for MAX4492ASD. Applications operating in high-temperature environments (industrial, automotive under-hood, or high-power dissipation circuits) must use alternatives with 125°C rating: MAX4492ASD+, TLV2634ID, TSV994IDT, or TSV994IYDT.

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