CS5381-KSZ Equivalent & Substitute Parts

Part Overview

The CS5381-KSZ is a 24-bit Sigma-Delta analog-to-digital converter manufactured by Cirrus Logic Inc., designed for multi-channel data acquisition applications. This device features two differential inputs with simultaneous sampling capability and I2S digital output interface. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

CS5381-KSZ

Cirrus Logic Inc.In Stock: 1459CS5381-KSZ Datasheet

Current PartRFQ

CS5381K-KSZ

Cirrus Logic Inc.In Stock: 922CS5381K-KSZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS5381-KSZ is determined by strict equivalence across the following critical parameters:

• Resolution: 24-bit conversion capability
• Sampling Rate: 216 kHz per second
• Input Configuration: 2 differential inputs with simultaneous sampling
• Data Interface: I2S protocol compatibility
• Architecture: Sigma-Delta conversion topology
• Package: 24-SOIC surface mount form factor
• Operating Temperature Range: -10°C ~ 70°C
• Reference: Internal voltage reference

The CS5381K-KSZ meets all these criteria and is identified as the manufacturer-recommended substitute. This part maintains functional and electrical equivalence while offering improved product status and supply availability.

Parameter Comparison

Engineering Selection Recommendations

The CS5381K-KSZ is the direct substitute for the obsolete CS5381-KSZ. Both parts are manufactured by Cirrus Logic Inc. and maintain identical functional specifications across resolution, sampling rate, input configuration, data interface, and package form factor.

The CS5381K-KSZ offers the following advantages:

• Active Product Status: Currently in production with established supply chain availability
• Regulatory Compliance: ROHS3 compliant and REACH unaffected, meeting current environmental standards
• Supply Voltage Specification: Defined operating ranges (4.75V ~ 5.25V analog, 3.1V ~ 5.25V digital) provide improved specification clarity compared to the main part's nominal values
• Moisture Sensitivity: Identical MSL rating of 3 (168 Hours) ensures equivalent handling and storage requirements

For applications currently using the CS5381-KSZ, direct substitution with the CS5381K-KSZ is supported without circuit redesign, provided that the defined supply voltage ranges are met within the system design.

Frequently Asked Questions (FAQ)

Q: Can the CS5381K-KSZ be used as a direct replacement for the CS5381-KSZ?

A: Yes. Both parts share identical resolution (24-bit), sampling rate (216 kHz), input configuration (2 differential), data interface (I2S), architecture (Sigma-Delta), and package (24-SOIC). The CS5381K-KSZ is the manufacturer-recommended substitute.

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

A: The CS5381-KSZ specifies 5V analog supply and 3.3V ~ 5V digital supply. The CS5381K-KSZ defines operating ranges of 4.75V ~ 5.25V for analog and 3.1V ~ 5.25V for digital. Both specifications overlap within standard 5V and 3.3V system designs. Verify your system's actual supply voltages fall within the CS5381K-KSZ ranges before substitution.

Q: Are there any package or mounting differences?

A: No. Both parts use the 24-SOIC surface mount package with identical 0.295" (7.50mm) width. PCB footprints and assembly processes remain unchanged.

Q: What is the product status difference, and why does it matter?

A: The CS5381-KSZ is obsolete, indicating end-of-life status with limited or no future availability. The CS5381K-KSZ is active, ensuring continued manufacturing and supply chain support for new designs and ongoing production requirements.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the CS5381-KSZ and CS5381K-KSZ are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level, and how does it affect handling?

A: Both parts have MSL 3 (168 Hours), indicating they must be stored in controlled humidity environments and used within 168 hours of exposure to ambient conditions above specified moisture levels. Standard ESD and moisture control procedures apply to both parts identically.