MAX146AEAP Equivalent & Substitute Parts

Part Overview

The MAX146AEAP is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring SAR (Successive Approximation Register) architecture. This device features 4 or 8 configurable input channels with both differential and single-ended input support, operating across a 2.7V to 3.6V supply range with a sampling rate of 133 kSPS.

The MAX146AEAP is classified as obsolete. Locating equivalent or substitute parts is necessary for ongoing production support, design updates, or inventory replenishment where original stock is unavailable or depleted.

Key Parameters

Parameter	Specification
Resolution	12 Bits
Sampling Rate	133 kSPS
Number of Input Channels	4, 8
Input Type	Differential, Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External, Internal
Analog Supply Voltage	2.7V ~ 3.6V
Digital Supply Voltage	2.7V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Package Type	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the MAX146AEAP is determined by strict equivalence across the following critical parameters:

Resolution and Sampling Rate: 12-bit resolution at 133 kSPS
Input Configuration: 4 or 8 configurable channels supporting both differential and single-ended inputs
Data Interface: SPI protocol compatibility
Architecture: SAR-based conversion
Supply Voltage Range: 2.7V to 3.6V for both analog and digital supplies
Operating Temperature: -40°C to 85°C
Package and Pinout: 20-SSOP form factor with identical mechanical and electrical pinout

The identified substitute parts maintain full electrical and mechanical compatibility with the original MAX146AEAP, differing only in product status and compliance certifications.

Parameter Comparison

Parameter	MAX146AEAP	MAX146AEAP+	MAX146BEAP+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Resolution	12 Bits	12 Bits	12 Bits
Sampling Rate	133 kSPS	133 kSPS	133 kSPS
Input Channels	4, 8	4, 8	4, 8
Input Type	Differential, Single Ended	Differential, Single Ended	Differential, Single Ended
Data Interface	SPI	SPI	SPI
Architecture	SAR	SAR	SAR
Reference Type	External, Internal	External, Internal	External, Internal
Analog Supply Voltage	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V
Digital Supply Voltage	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS Non-Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Packaging	Bulk	Tube	Tube

Engineering Selection Recommendations

MAX146AEAP+ (Direct Manufacturer Equivalent)

The MAX146AEAP+ is the direct successor to the MAX146AEAP, maintaining identical electrical specifications and pinout. This part is classified as active and carries ROHS3 compliance certification, making it suitable for new designs and production environments with RoHS requirements. The tubed packaging format provides improved handling and traceability compared to bulk packaging.

MAX146BEAP+ (Parametric Equivalent)

The MAX146BEAP+ provides full parametric equivalence to the MAX146AEAP across all electrical and mechanical specifications. This part is also active and ROHS3 compliant. Selection between MAX146AEAP+ and MAX146BEAP+ depends on availability, lead time, and supplier inventory levels, as both parts are functionally interchangeable within the specified operating parameters.

Both substitute parts eliminate the obsolescence risk associated with the original MAX146AEAP while providing improved compliance posture for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can MAX146AEAP+ and MAX146BEAP+ be used interchangeably with MAX146AEAP?

A: Yes. Both substitute parts maintain identical electrical specifications, pinout, and package dimensions. Direct substitution is possible without circuit modification or PCB redesign.

Q: What is the difference between MAX146AEAP+ and MAX146BEAP+?

A: Both parts are parametrically equivalent with identical performance specifications. The difference lies in product designation and potential manufacturing lot variations. Selection should be based on availability and supplier inventory.

Q: Does the tubed packaging of MAX146AEAP+ and MAX146BEAP+ affect compatibility?

A: No. Tubed packaging is a handling and storage format only. It does not affect electrical performance, pinout, or mechanical fit on PCBs. Both tubed and bulk packaged versions are mechanically and electrically identical.

Q: Are MAX146AEAP+ and MAX146BEAP+ RoHS compliant?

A: Yes. Both substitute parts carry ROHS3 compliance certification, whereas the original MAX146AEAP is RoHS non-compliant. This makes the substitutes suitable for applications with RoHS regulatory requirements.

Q: Can the MAX146AEAP be used in new designs?

A: The MAX146AEAP is classified as obsolete. For new designs, MAX146AEAP+ or MAX146BEAP+ are recommended to ensure long-term supply availability and compliance with current regulatory standards.

Q: What supply voltage range do these parts support?

A: All three parts (MAX146AEAP, MAX146AEAP+, MAX146BEAP+) operate with analog and digital supply voltages ranging from 2.7V to 3.6V, supporting low-power applications and battery-operated systems.

Q: Is the SPI interface identical across all three parts?

A: Yes. The SPI data interface is identical across MAX146AEAP, MAX146AEAP+, and MAX146BEAP+. No firmware or software modifications are required for substitution.

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