ISL26311FBZ Equivalent & Substitute Parts

Part Overview

The ISL26311FBZ is a 12-bit Analog to Digital Converter manufactured by Renesas Electronics Corporation, designed for single-ended input data acquisition applications. This component features a Successive Approximation Register (SAR) architecture with SPI digital interface and operates across a wide supply voltage range of 2.7V to 5.25V for both analog and digital domains. The ISL26311FBZ is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

ISL26311FBZ

Renesas Electronics CorporationIn Stock: 1284ISL26311FBZ Datasheet

Current PartRFQ

ISL26321FBZ

Renesas Electronics CorporationIn Stock: 3060ISL26321FBZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISL26321FBZ qualifies as a direct substitute for the ISL26311FBZ based on the following critical parameters that determine functional equivalence:

• 12-bit resolution (identical)
• Single-ended input configuration (identical)
• SPI digital interface (identical)
• SAR architecture (identical)
• External reference type (identical)
• 2.7V ~ 5.25V supply voltage range (identical)
• -40°C ~ 125°C operating temperature range (identical)
• 8-SOIC package footprint (identical)
• Surface mount mounting type (identical)
• ROHS3 compliance (identical)

The primary distinction between these components is the sampling rate specification, where the ISL26321FBZ operates at 250 kSPS compared to the ISL26311FBZ at 125 kSPS. This higher sampling capability in the substitute part maintains backward compatibility for applications requiring the original 125 kSPS specification while providing additional performance headroom.

Parameter Comparison

Engineering Selection Recommendations

Both the ISL26311FBZ and ISL26321FBZ are classified as obsolete products. The ISL26321FBZ serves as the direct functional equivalent with identical electrical and mechanical specifications except for enhanced sampling rate capability. Selection between these components should be based on:

• Availability: The ISL26321FBZ currently maintains higher inventory levels (3047 pcs vs. 1187 pcs)
• Compliance Requirements: Both components meet ROHS3 compliance and REACH unaffected status, suitable for regulated applications
• Packaging: Both utilize identical 8-SOIC surface mount packages, ensuring PCB layout compatibility
• Supply Voltage Compatibility: Identical 2.7V ~ 5.25V operating ranges for both analog and digital supplies
• Temperature Range: Both support the full -40°C ~ 125°C industrial operating range

Frequently Asked Questions (FAQ)

Q: Can the ISL26321FBZ directly replace the ISL26311FBZ in existing designs?

A: Yes. The ISL26321FBZ maintains identical pin configuration, package footprint, supply voltage requirements, and digital interface specifications. No PCB modifications are required for substitution.

Q: What is the difference in sampling rate between these parts?

A: The ISL26311FBZ operates at 125 kSPS while the ISL26321FBZ operates at 250 kSPS. Applications designed for 125 kSPS operation remain fully compatible with the higher-speed substitute.

Q: Are there any compliance or certification differences?

A: Both components are ROHS3 compliant and REACH unaffected. Moisture sensitivity levels differ (MSL 2 for ISL26311FBZ vs. MSL 3 for ISL26321FBZ), which may impact storage and handling requirements.

Q: Is the 8-SOIC package identical between both parts?

A: Yes. Both components use the 8-SOIC package with 0.154" (3.90mm) width, ensuring identical PCB footprint and assembly compatibility.

Q: What supply voltages do these ADCs support?

A: Both the ISL26311FBZ and ISL26321FBZ support 2.7V to 5.25V for analog supply and 2.7V to 5.25V for digital supply, providing flexibility across 3.3V and 5V system designs.

Q: Are these parts still in production?

A: Both components are classified as obsolete. Inventory availability should be verified with authorized distributors before design commitment.