MAX158ACWI Equivalent & Substitute Parts

Part Overview

The MAX158ACWI is an 8-bit flash analog-to-digital converter manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring high-speed conversion. This device features 8 single-ended inputs, a 400 kSPS sampling rate, and operates from dual 5V supplies. The MAX158ACWI is classified as obsolete, making identification of compatible alternatives essential for ongoing system support and new design implementations.

Substiute Parts

MAX158ACWI

Analog Devices Inc./Maxim IntegratedIn Stock: 3174MAX158ACWI Datasheet

Current PartRFQ

MAX158BCWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 3181MAX158BCWI+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX158ACWI is determined by strict equivalence across the following critical parameters:

• Resolution & Sampling Rate: 8-bit resolution at 400 kSPS
• Input Configuration: 8 single-ended inputs with multiplexer and sample-and-hold architecture
• Data Interface: Parallel output format
• Supply Voltages: Dual 5V analog and digital supplies
• Package & Pinout: 28-SOIC surface mount package with identical pin configuration
• Temperature Range: 0°C to 70°C operating specification

The MAX158BCWI+ meets all these criteria and is therefore a direct parametric equivalent. The primary distinction between these parts is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The MAX158BCWI+ is the direct substitute for the MAX158ACWI. Both devices are electrically and mechanically identical across all functional parameters. Selection between these parts should be based on the following criteria:

For New Designs and Long-Term Support: The MAX158BCWI+ is the recommended choice. This part carries Active product status, ensuring continued availability and manufacturer support. It meets RoHS3 compliance requirements, satisfying modern environmental and regulatory standards applicable to electronic components.

For Legacy System Maintenance: The MAX158ACWI remains available in inventory (3080 units) for direct replacement in existing applications where the original part specification is required. However, transition to the MAX158BCWI+ is advisable for future procurement cycles.

Both parts share identical electrical performance, pinout, and package specifications, ensuring drop-in compatibility at the circuit board level.

Frequently Asked Questions (FAQ)

Q: Can the MAX158BCWI+ directly replace the MAX158ACWI in existing designs?

A: Yes. The MAX158BCWI+ is a direct parametric equivalent with identical resolution, sampling rate, input configuration, supply voltages, and 28-SOIC package. No circuit modifications are required for substitution.

Q: What is the primary difference between these two parts?

A: The MAX158ACWI is classified as obsolete, while the MAX158BCWI+ maintains active product status. Additionally, the MAX158BCWI+ is RoHS3 compliant, whereas the MAX158ACWI is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with the 28-SOIC package?

A: No. Both parts use the identical 28-SOIC (0.295", 7.50mm width) surface mount package with matching pinout. PCB layouts and assembly processes require no modification.

Q: What supply voltages are required for operation?

A: Both the MAX158ACWI and MAX158BCWI+ require dual 5V supplies: one for analog circuitry and one for digital logic. Single-supply operation is not supported by these devices.

Q: Is the internal voltage reference suitable for all applications?

A: Both parts feature an internal reference. Applications requiring external reference control or precision reference adjustment should evaluate alternative ADC architectures with external reference inputs.

Q: What is the operating temperature specification?

A: Both devices operate across the 0°C to 70°C temperature range. Applications requiring extended temperature operation (industrial or automotive) should evaluate alternative part numbers with wider temperature specifications.