MAX1271ACAI Equivalent & Substitute Parts

Part Overview

The MAX1271ACAI is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring 8-channel single-ended input with serial (SPI) interface. The device operates at a 110 kHz sampling rate and is housed in a 28-SSOP surface mount package.

This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure continued availability for system maintenance, production continuity, and design flexibility when the original part becomes unavailable from inventory channels.

Substiute Parts

MAX1271ACAI

Analog Devices Inc./Maxim IntegratedIn Stock: 1145MAX1271ACAI Datasheet

Current PartRFQ

MAX1271ACAI+

Analog Devices Inc./Maxim IntegratedIn Stock: 2345MAX1271ACAI+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX1271ACAI is determined by strict equivalence across the following critical parameters:

• Resolution: 12-bit ADC capability
• Channel Count: 8 input channels
• Input Configuration: Single-ended inputs
• Sampling Rate: 110 kHz minimum
• Serial Interface: SPI protocol compatibility
• Package: 28-SSOP form factor
• Supply Voltage: 5V operation (analog and digital)
• Temperature Range: 0°C to 70°C minimum operating window

The MAX1271ACAI+ meets all these criteria and is identified as a direct substitute. The primary distinction is product status and compliance certification, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The MAX1271ACAI+ is the direct functional equivalent of the MAX1271ACAI. Selection between these parts should be based on the following criteria:

Product Status: The MAX1271ACAI is obsolete, while the MAX1271ACAI+ is active. For new designs or long-term production requirements, the MAX1271ACAI+ is the appropriate choice due to continued manufacturer support and availability.

Compliance Requirements: The MAX1271ACAI+ carries ROHS3 compliance certification, whereas the original part is non-compliant. Systems subject to RoHS regulations must use the MAX1271ACAI+. Both parts are REACH Unaffected and classified under ECCN EAR99.

Supply Voltage Tolerance: The MAX1271ACAI+ specifies a supply voltage range of 4.75V to 5.25V, providing greater tolerance than the nominal 5V specification of the original part. This enhanced tolerance improves system robustness in applications with variable supply conditions.

Packaging and Inventory: The MAX1271ACAI+ is available in tube packaging with higher inventory levels (2250 pcs), compared to the original part's limited stock (1036 pcs).

Frequently Asked Questions (FAQ)

Q: Can the MAX1271ACAI+ be used as a direct replacement for the MAX1271ACAI in existing designs?

A: Yes. The MAX1271ACAI+ is functionally equivalent across all critical parameters: 12-bit resolution, 8 single-ended input channels, 110 kHz sampling rate, SPI serial interface, and 28-SSOP package. Pin-for-pin compatibility and electrical characteristics are identical. No design modifications are required.

Q: What is the difference between the MAX1271ACAI and MAX1271ACAI+?

A: The primary differences are product status and compliance. The MAX1271ACAI is obsolete and RoHS non-compliant. The MAX1271ACAI+ is an active product with ROHS3 compliance. The MAX1271ACAI+ also specifies a supply voltage range (4.75V to 5.25V) rather than a nominal value, providing improved tolerance margins.

Q: Are there any package or mounting differences?

A: Both parts use the 28-SSOP package (0.209", 5.30mm width) with surface mount technology. No PCB layout modifications are necessary when substituting between these parts.

Q: Which part should be selected for new designs?

A: The MAX1271ACAI+ should be selected for all new designs. It is an active product with manufacturer support, improved compliance certifications, and better supply voltage tolerance. The MAX1271ACAI is obsolete and should only be used for legacy system maintenance where existing inventory is available.

Q: Does the supply voltage range difference affect circuit design?

A: The MAX1271ACAI+ operates across 4.75V to 5.25V, compared to the nominal 5V specification of the original part. This wider tolerance improves system reliability in applications with supply voltage variations. Existing designs using nominal 5V supplies will operate within the MAX1271ACAI+ specification without modification.