MAX1270AENG Equivalent & Substitute Parts

Part Overview

The MAX1270AENG is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring 8 single-ended analog inputs with a 110 kHz sampling rate. The device features a successive approximation register (SAR) architecture with integrated multiplexer and sample-and-hold circuitry, communicating via SPI interface.

The MAX1270AENG is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for legacy systems and new designs requiring compatible functionality.

Substiute Parts

MAX1270AENG

Analog Devices Inc./Maxim IntegratedIn Stock: 3373MAX1270AENG Datasheet

Current PartRFQ

MAX1270AENG+

Analog Devices Inc./Maxim IntegratedIn Stock: 1896MAX1270AENG+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX1270AENG is determined by strict equivalence across the following critical parameters:

• Resolution: 12-bit conversion capability
• Channel Count: 8 single-ended analog inputs
• Sampling Rate: 110 kHz per second
• Architecture: SAR-based analog-to-digital conversion
• Serial Interface: SPI protocol compatibility
• Supply Voltage: 5V analog and digital supply
• Operating Temperature: -40°C to 85°C range
• Package: 24-DIP through-hole form factor

The MAX1270AENG+ qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The MAX1270AENG+ is the direct functional equivalent of the MAX1270AENG. Selection between these parts should be based on the following criteria:

For Legacy System Maintenance: The MAX1270AENG remains suitable for repair and maintenance of existing systems where the obsolete part number is already in production use and no design modifications are planned.

For New Designs and Ongoing Production: The MAX1270AENG+ is the preferred selection. This part maintains identical electrical performance and package compatibility while offering active product status and ROHS3 compliance certification. The extended supply voltage tolerance (4.75V ~ 5.25V versus fixed 5V) provides improved design flexibility for systems with variable power supplies.

Compliance Considerations: The MAX1270AENG+ meets current RoHS3 requirements, making it suitable for applications subject to environmental and regulatory compliance mandates. The MAX1270AENG does not meet these standards.

Frequently Asked Questions (FAQ)

Q: Can the MAX1270AENG+ directly replace the MAX1270AENG in existing circuit designs?

A: Yes. The MAX1270AENG+ maintains identical pin configuration, package dimensions, and core electrical specifications (12-bit resolution, 8 channels, 110 kHz sampling rate, SPI interface, 24-DIP package). No circuit modifications are required for direct substitution.

Q: What is the difference in supply voltage specifications between these parts?

A: The MAX1270AENG specifies fixed 5V supply voltage. The MAX1270AENG+ specifies a tolerance range of 4.75V to 5.25V for both analog and digital supplies. This range encompasses the nominal 5V specification, ensuring compatibility with the original design while providing operational margin for systems with regulated power supplies.

Q: Does the MAX1270AENG+ support additional serial interface protocols?

A: The MAX1270AENG+ supports SPI, QSPI, MICROWIRE, and Serial protocols. The MAX1270AENG specifies SPI interface. Designs utilizing only SPI communication experience no functional difference. Designs requiring QSPI, MICROWIRE, or Serial protocols can leverage the expanded interface capability of the MAX1270AENG+.

Q: Why is the MAX1270AENG classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. The MAX1270AENG+ represents the current active equivalent, ensuring ongoing availability, manufacturing support, and compliance with current regulatory standards.

Q: Are there any thermal or environmental performance differences?

A: Both parts operate across the identical temperature range of -40°C to 85°C. No thermal performance differences exist between the two devices.

Q: What packaging options are available?

A: Both parts are supplied in 24-DIP through-hole packages. The MAX1270AENG+ is available in tube packaging. The MAX1270AENG packaging specification is not detailed in the provided data.