ICL7650CSD+ Zero-Drift Operational Amplifier Equivalent & Substitute Parts

Part Overview

The ICL7650CSD+ is a zero-drift operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for precision analog signal processing applications requiring minimal input offset voltage. This single-circuit amplifier is housed in a 14-SOIC surface mount package and operates across a 4.5V to 16V supply voltage range.

The ICL7650CSD+ has reached obsolete product status. Identifying qualified substitute components is essential for design continuity, procurement planning, and new production builds where this part is no longer available through standard distribution channels.

Substiute Parts

ICL7650CSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 3148ICL7650CSD+ Datasheet

Current PartRFQ

TLC2652AC-14D

Texas InstrumentsIn Stock: 2197TLC2652AC-14D Datasheet

MFR RecommendedRFQ

TLC2652AI-14D

Texas InstrumentsIn Stock: 962TLC2652AI-14D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the ICL7650CSD+ are qualified based on the following substitution criteria:

Functional Equivalence: All substitute parts must be zero-drift operational amplifiers with a single circuit configuration housed in a 14-SOIC surface mount package.

Electrical Compatibility: Substitute parts must operate within the supply voltage range of 4.5V to 16V maximum and maintain surface mount assembly compatibility.

Package Compatibility: All substitutes use the identical 14-SOIC (0.154", 3.90mm Width) package, ensuring direct PCB layout compatibility without redesign.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental specifications.

The two qualified substitutes—TLC2652AC-14D and TLC2652AI-14D—are both Texas Instruments LinCMOS™ series zero-drift amplifiers that meet these core substitution parameters.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production Continuity: The TLC2652AI-14D is the primary substitute recommendation. This part carries Active product status from Texas Instruments, ensuring long-term availability and supply chain stability. It maintains full ROHS3 compliance and MSL Level 1 rating identical to the original ICL7650CSD+. The extended operating temperature range of -40°C to 85°C provides broader environmental coverage compared to the original 0°C to 70°C specification.

For Last-Time-Buy Scenarios: The TLC2652AC-14D is available as a secondary option with Last Time Buy status. This part shares identical electrical specifications with the TLC2652AI-14D but operates within the narrower 0°C to 70°C temperature range, matching the original ICL7650CSD+ thermal envelope. Current inventory of 2,100 pieces supports medium-volume procurement requirements.

Compliance and Regulatory Considerations: Both substitute parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 export classification, matching the regulatory profile of the original component. MSL Level 1 (Unlimited) moisture sensitivity ensures compatibility with standard PCB assembly processes without additional drying or handling requirements.

Frequently Asked Questions (FAQ)

Q: Can TLC2652AC-14D and TLC2652AI-14D be used interchangeably with ICL7650CSD+?

A: Both TLC2652 variants are functionally equivalent substitutes for the ICL7650CSD+ in applications where the operating temperature range of 0°C to 70°C is maintained. The TLC2652AI-14D extends this range to -40°C to 85°C, providing additional thermal flexibility. All three parts use identical 14-SOIC packaging and operate within the 4.5V to 16V supply voltage specification.

Q: What are the key electrical differences between the ICL7650CSD+ and TLC2652 substitutes?

A: The TLC2652 series exhibits superior input offset voltage performance (0.5 µV versus 700 µV) and higher slew rate (3.1 V/µs versus 2.5 V/µs). Input bias current is slightly higher at 4 pA compared to 1.5 pA. Supply current increases from 1.2 mA to 1.5 mA. Gain bandwidth product is marginally lower at 1.9 MHz versus 2 MHz. These differences are within typical application tolerances for zero-drift amplifier circuits.

Q: Are there any PCB layout modifications required when substituting TLC2652 parts for ICL7650CSD+?

A: No PCB layout modifications are required. Both the ICL7650CSD+ and TLC2652 series use the identical 14-SOIC (0.154", 3.90mm Width) surface mount package. Pin-to-pin compatibility is maintained, allowing direct component substitution without redesign.

Q: What is the difference between TLC2652AC-14D and TLC2652AI-14D?

A: Both parts are electrically identical zero-drift amplifiers with matching electrical specifications. The primary distinction is product lifecycle status and operating temperature range. TLC2652AC-14D carries Last Time Buy status with 0°C to 70°C operation, while TLC2652AI-14D is Active with extended -40°C to 85°C operation. For new designs, TLC2652AI-14D is recommended due to its active status and broader temperature coverage.

Q: Do the substitute parts maintain the same regulatory compliance as ICL7650CSD+?

A: Yes. Both TLC2652AC-14D and TLC2652AI-14D are ROHS3 compliant, REACH Unaffected, and carry EAR99 export classification, matching the original ICL7650CSD+ regulatory profile. Moisture sensitivity level remains MSL 1 (Unlimited) for all three parts.

Q: What inventory considerations should guide substitute part selection?

A: TLC2652AI-14D (889 pieces in stock) is recommended for immediate procurement due to Active product status. TLC2652AC-14D (2,100 pieces in stock) provides higher inventory availability but carries Last Time Buy status, indicating limited future supply. For long-term production requirements, TLC2652AI-14D ensures sustained availability.