MAX178BEWG 12-Bit SAR ADC Equivalent & Substitute Parts

Part Overview

The MAX178BEWG is a 12-bit Successive Approximation Register (SAR) analog-to-digital converter manufactured by Analog Devices Inc./Maxim Integrated. This single-channel data acquisition component features parallel digital output and operates with external voltage references. The device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

MAX178BEWG

Analog Devices Inc./Maxim IntegratedIn Stock: 706MAX178BEWG Datasheet

Current PartRFQ

MAX178BEWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 927MAX178BEWG+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX178BEWG is determined by strict equivalence across the following critical parameters:

• Resolution: 12 bits (exact match required)
• Sampling Rate: 17 kSPS (exact match required)
• Channel Configuration: Single input, single-ended (exact match required)
• Architecture: SAR topology (exact match required)
• Data Interface: Parallel output (exact match required)
• Reference Configuration: External reference (exact match required)
• Supply Voltages: ±5V analog and 5V digital (exact match required)
• Operating Temperature: -40°C ~ 85°C (exact match required)
• Package: 24-SOIC form factor (exact match required)
• Mounting: Surface mount (exact match required)

Only parts meeting all these criteria qualify as direct substitutes. The MAX178BEWG+ satisfies all substitution parameters while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MAX178BEWG+ is the direct functional equivalent of the MAX178BEWG. Both parts share identical electrical specifications, pin configuration, and package geometry, ensuring pin-for-pin compatibility in existing circuit designs.

The MAX178BEWG+ offers two significant advantages over the original part:

1. Product Status: The MAX178BEWG+ maintains active production status, ensuring long-term availability and supply chain continuity. The MAX178BEWG is obsolete and subject to availability constraints.

2. Regulatory Compliance: The MAX178BEWG+ is ROHS3 compliant, meeting current environmental and regulatory requirements. The MAX178BEWG is RoHS non-compliant, which may present procurement restrictions in regulated applications.

For new designs or component replacement in existing systems, the MAX178BEWG+ is the appropriate selection. Both parts are electrically and mechanically interchangeable without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can MAX178BEWG+ be used as a direct replacement for MAX178BEWG in existing designs?

A: Yes. The MAX178BEWG+ is electrically and mechanically identical to the MAX178BEWG. Both parts feature the same 12-bit resolution, 17 kSPS sampling rate, single-channel single-ended input, SAR architecture, parallel data interface, external reference configuration, supply voltages, operating temperature range, and 24-SOIC package. No circuit modifications are required.

Q: What is the primary difference between MAX178BEWG and MAX178BEWG+?

A: The MAX178BEWG+ is the active production variant with ROHS3 compliance and tube packaging. The MAX178BEWG is obsolete and RoHS non-compliant. Functionally and electrically, both parts are equivalent.

Q: Are there any pin configuration differences between these parts?

A: No. Both the MAX178BEWG and MAX178BEWG+ use identical 24-SOIC packaging with the same pin assignments. They are pin-for-pin compatible.

Q: Does the MAX178BEWG+ require different PCB layout or design considerations?

A: No. The MAX178BEWG+ maintains the same package footprint, mounting type (surface mount), and electrical interface as the MAX178BEWG. Existing PCB designs require no modification.

Q: What supply voltages are required for the MAX178BEWG+?

A: The MAX178BEWG+ requires ±5V analog supply and 5V digital supply, with analog supply range of 11.4V to 15.75V. These specifications are identical to the MAX178BEWG.

Q: Is the MAX178BEWG+ suitable for industrial temperature applications?

A: The MAX178BEWG+ operates across the -40°C to 85°C temperature range, matching the MAX178BEWG specification. This range covers industrial and extended commercial applications.