ICL7650CPD Equivalent & Substitute Parts

Part Overview

The ICL7650CPD is a chopper (zero-drift) amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in a 14-PDIP through-hole package. This single-circuit operational amplifier is designed for applications requiring extremely low input offset voltage and minimal drift characteristics. The ICL7650CPD is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

ICL7650CPD

Analog Devices Inc./Maxim IntegratedIn Stock: 1216ICL7650CPD Datasheet

Current PartRFQ

TC7650CPD

Microchip TechnologyIn Stock: 1504TC7650CPD Datasheet

MFR RecommendedRFQ

TLC2652ACN

Texas InstrumentsIn Stock: 3220TLC2652ACN Datasheet

MFR RecommendedRFQ

TLC2652AIN

Texas InstrumentsIn Stock: 1220TLC2652AIN Datasheet

MFR RecommendedRFQ

TLC2652CN

Texas InstrumentsIn Stock: 5077TLC2652CN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICL7650CPD is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 14-DIP (0.300", 7.62mm) through-hole package to ensure mechanical and electrical compatibility with existing PCB layouts.

Amplifier Classification: Substitute parts must be zero-drift or chopper-stabilized amplifiers, as this architecture defines the low input offset voltage and drift characteristics essential to the ICL7650CPD's function.

Single-Circuit Configuration: All substitutes must contain exactly one amplifier circuit per package.

Supply Voltage Range: Substitute parts must operate within the 4.5 V to 16 V supply span to maintain compatibility with existing power distribution systems.

Operating Temperature Range: Substitute parts must support the 0°C to 70°C operating temperature range or an extended range that encompasses this specification.

Electrical Performance Envelope: Substitute parts must meet or exceed the slew rate (2.5 V/µs minimum), gain bandwidth product (2 MHz minimum), and input bias current (1.5 pA maximum) specifications.

The four substitute parts identified—TC7650CPD, TLC2652ACN, TLC2652AIN, and TLC2652CN—satisfy these substitution criteria and are available as active or last-time-buy components from current manufacturers.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TC7650CPD

The TC7650CPD manufactured by Microchip Technology is the primary substitute for the obsolete ICL7650CPD. This part maintains identical electrical specifications including slew rate (2.5 V/µs), gain bandwidth product (2 MHz), and input bias current (1.5 pA). The TC7650CPD is classified as active product status, ensuring long-term availability and supply chain continuity. The part is ROHS3 compliant, addressing regulatory requirements for new designs and procurement. The 14-PDIP package provides direct mechanical compatibility with existing through-hole PCB layouts.

Secondary Recommendations: TLC2652 Series (TLC2652ACN, TLC2652AIN, TLC2652CN)

The Texas Instruments TLC2652 series represents alternative zero-drift amplifiers in the 14-DIP package. These parts offer enhanced slew rate performance (3.1 V/µs versus 2.5 V/µs) and lower input offset voltage (0.5 to 0.6 µV versus 700 µV). The TLC2652 series is ROHS3 compliant and available in multiple temperature grades:

• TLC2652CN: Standard commercial temperature range (0°C to 70°C), matching the ICL7650CPD operating window
• TLC2652ACN: Commercial temperature range (0°C to 70°C) with single-ended output specification
• TLC2652AIN: Extended industrial temperature range (−40°C to 85°C), suitable for applications requiring broader thermal operation

All TLC2652 variants are classified as last-time-buy, indicating limited future availability. Selection among these variants depends on specific temperature range requirements and output configuration needs.

Compliance Considerations

The ICL7650CPD is RoHS non-compliant. All identified substitute parts (TC7650CPD and TLC2652 series) are ROHS3 compliant, supporting regulatory compliance for new system designs and manufacturing processes. REACH status is unaffected across all parts, and ECCN classification remains EAR99 for all substitutes.

Frequently Asked Questions (FAQ)

Q: Can the TC7650CPD directly replace the ICL7650CPD in existing designs?

A: Yes. The TC7650CPD maintains identical electrical specifications (slew rate, gain bandwidth product, input bias current) and uses the same 14-DIP through-hole package. No PCB layout modifications are required. The TC7650CPD is the direct functional equivalent and is classified as active product status.

Q: What are the key differences between the TC7650CPD and TLC2652 series?

A: The TC7650CPD matches the ICL7650CPD electrical specifications exactly. The TLC2652 series offers improved performance with higher slew rate (3.1 V/µs) and significantly lower input offset voltage (0.5 to 0.6 µV versus 700 µV and 0.7 µV respectively). However, the TLC2652 series is classified as last-time-buy, indicating limited future availability compared to the TC7650CPD's active status.

Q: Are all substitute parts RoHS compliant?

A: Yes. The TC7650CPD and all TLC2652 variants (TLC2652ACN, TLC2652AIN, TLC2652CN) are ROHS3 compliant. The original ICL7650CPD is RoHS non-compliant. This compliance upgrade supports regulatory requirements for new designs and manufacturing processes.

Q: Which substitute part should be selected for extended temperature operation?

A: The TLC2652AIN supports an extended operating temperature range of −40°C to 85°C, compared to the standard 0°C to 70°C range of the ICL7650CPD, TC7650CPD, TLC2652ACN, and TLC2652CN. Selection of the TLC2652AIN is appropriate for applications requiring operation beyond the standard commercial temperature window.

Q: Is the 14-DIP package compatible with modern PCB assembly processes?

A: The 14-DIP through-hole package is compatible with through-hole assembly processes. All substitute parts use the identical 14-DIP (0.300", 7.62mm) package, ensuring mechanical compatibility with existing PCB layouts. Through-hole components remain standard for legacy system support and applications requiring through-hole mounting.

Q: What is the supply voltage compatibility across all substitute parts?

A: All substitute parts operate within the 4.5 V to 16 V supply span. The TLC2652 series supports a minimum supply voltage of 3.8 V, providing additional headroom for lower-voltage applications. The TC7650CPD maintains the 4.5 V minimum specification of the original ICL7650CPD.

Q: Why is the TC7650CPD recommended over the TLC2652 series despite lower performance specifications?

A: The TC7650CPD is classified as active product status, ensuring long-term availability and supply chain continuity. The TLC2652 series is classified as last-time-buy, indicating limited future production and potential supply constraints. For applications where the ICL7650CPD's electrical specifications are sufficient, the TC7650CPD provides superior long-term procurement reliability.