MAX430EPA Equivalent & Substitute Parts

Part Overview

The MAX430EPA is a zero-drift operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-PDIP package for through-hole mounting. This device is classified as obsolete, with 2000 units currently in stock. The MAX430EPA delivers ultra-low input offset voltage of 2 µV and extremely low input bias current of 10 pA, making it suitable for precision analog signal conditioning applications requiring minimal drift over temperature and time.

Due to its obsolete product status, equivalent and substitute parts from the active product portfolio are necessary for new designs and long-term supply chain continuity. The substitute parts listed below maintain functional compatibility within the specified electrical and mechanical parameters while offering active product status and improved compliance certifications.

Key Parameters

Parameter	MAX430EPA
Amplifier Type	Zero-Drift
Number of Circuits	1
Slew Rate	0.5 V/µs
Gain Bandwidth Product	500 kHz
Current - Input Bias	10 pA
Voltage - Input Offset	2 µV
Current - Supply	1.3 mA
Voltage - Supply Span (Min)	5 V
Voltage - Supply Span (Max)	33 V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-DIP (0.300", 7.62 mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MAX430EPA is determined by the following critical parameters:

Package Compatibility: All substitute parts maintain the 8-DIP (0.300", 7.62 mm) through-hole package format, ensuring mechanical and pin-level compatibility with existing PCB layouts.

Electrical Operating Range: Substitute parts must support the supply voltage range of the original device. The MAX430EPA operates from 5 V to 33 V. All substitute parts listed operate within or exceed this range (6 V to 36 V minimum/maximum), providing direct compatibility.

Single Circuit Configuration: All substitute parts contain exactly one amplifier circuit, matching the original device topology.

Amplifier Classification: Substitute parts are grouped into two functional categories:

General Purpose Amplifiers (LT1001 series): Lower input bias current and offset voltage specifications compared to instrumentation amplifiers, suitable for applications where precision and low drift are secondary to general-purpose signal conditioning.
Instrumentation Amplifiers (LT1168 series): Optimized for differential signal measurement with controlled input bias current and offset voltage, providing enhanced performance for precision measurement applications.

The LT1168 series maintains the 0.5 V/µs slew rate of the original MAX430EPA, while the LT1001 series operates at 0.25 V/µs. All substitute parts are manufactured by Analog Devices Inc. and carry active product status with RoHS3 compliance.

Parameter Comparison

Parameter	MAX430EPA	LT1001ACN8#PBF	LT1001CN8#PBF	LT1168CN8#PBF	LT1168IN8#PBF
Amplifier Type	Zero-Drift	General Purpose	General Purpose	Instrumentation	Instrumentation
Number of Circuits	1	1	1	1	1
Slew Rate (V/µs)	0.5	0.25	0.25	0.5	0.5
Gain Bandwidth Product (kHz)	500	800	800	400	400
Current - Input Bias (pA)	10	500	700	80	80
Voltage - Input Offset (µV)	2	10	18	20	20
Voltage - Supply Span (Min/Max)	5 V / 33 V	6 V / 36 V	6 V / 36 V	4.6 V / 36 V	4.6 V / 36 V
Operating Temperature	-40°C ~ 85°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 70°C	-40°C ~ 85°C
Package / Case	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

For Active Product Status and Compliance Requirements:

All four substitute parts (LT1001ACN8#PBF, LT1001CN8#PBF, LT1168CN8#PBF, LT1168IN8#PBF) carry active product status, ensuring long-term availability and supply chain continuity. All substitute parts are RoHS3 compliant, addressing regulatory requirements for new designs and manufacturing environments with RoHS restrictions.

For Temperature Range Compatibility:

The LT1168IN8#PBF maintains the identical operating temperature range (-40°C ~ 85°C) as the MAX430EPA, making it the optimal choice for applications requiring extended low-temperature operation. The LT1001 series operates from 0°C ~ 125°C, suitable for applications with reduced low-temperature requirements. The LT1168CN8#PBF operates from 0°C ~ 70°C and is not suitable for applications requiring operation below 0°C or above 70°C.

For Supply Voltage Compatibility:

The LT1168 series (both CN8 and IN8 variants) supports a minimum supply voltage of 4.6 V, providing enhanced compatibility with lower-voltage supply rails compared to the LT1001 series (6 V minimum). The MAX430EPA minimum supply voltage of 5 V is within the LT1168 operating range.

For Inventory Availability:

LT1001CN8#PBF offers the highest inventory level (4379 units), followed by LT1168IN8#PBF (1050 units), LT1168CN8#PBF (1019 units), and LT1001ACN8#PBF (1184 units).

Frequently Asked Questions (FAQ)

Q: Can the LT1001 series directly replace the MAX430EPA in all applications?

A: The LT1001 series maintains package and supply voltage compatibility with the MAX430EPA. However, the LT1001 series exhibits higher input bias current (500-700 pA versus 10 pA) and higher input offset voltage (10-18 µV versus 2 µV). Applications requiring ultra-low input bias current and minimal offset voltage drift should use the LT1168 series instead.

Q: What is the difference between LT1168CN8#PBF and LT1168IN8#PBF?

A: Both parts are instrumentation amplifiers with identical electrical specifications. The primary difference is operating temperature range: LT1168CN8#PBF operates from 0°C ~ 70°C, while LT1168IN8#PBF operates from -40°C ~ 85°C, matching the MAX430EPA temperature range. Select LT1168IN8#PBF for applications requiring extended low-temperature operation.

Q: Are all substitute parts pin-compatible with the MAX430EPA?

A: Yes. All substitute parts use the 8-DIP (0.300", 7.62 mm) through-hole package with identical pin assignments, ensuring direct PCB compatibility without layout modifications.

Q: What is the difference between LT1001ACN8#PBF and LT1001CN8#PBF?

A: Both are general-purpose amplifiers in the 8-DIP package. The LT1001ACN8#PBF exhibits lower input bias current (500 pA versus 700 pA) and lower input offset voltage (10 µV versus 18 µV) compared to LT1001CN8#PBF. For applications requiring lower input bias current, LT1001ACN8#PBF is the preferred choice.

Q: Why does the LT1168 series have lower gain bandwidth product (400 kHz) compared to the MAX430EPA (500 kHz)?

A: The LT1168 series is optimized for instrumentation applications with emphasis on input bias current control and offset voltage stability. The lower gain bandwidth product reflects this design optimization. Applications requiring higher bandwidth should evaluate the LT1001 series (800 kHz gain bandwidth product).

Q: Are all substitute parts RoHS compliant?

A: Yes. All four substitute parts carry RoHS3 compliance certification. The original MAX430EPA is RoHS non-compliant, making the substitute parts necessary for designs subject to RoHS regulatory requirements.

Q: What is the supply current difference between the MAX430EPA and substitute parts?

A: The MAX430EPA draws 1.3 mA supply current. The LT1168 series draws 350 µA, providing significantly lower power consumption. The LT1001 series supply current is not specified in the provided parameters.

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