ICL7650CPD+ Zero-Drift Operational Amplifier Equivalent & Substitute Parts

Part Overview

The ICL7650CPD+ is a chopper (zero-drift) operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for precision analog signal processing applications requiring extremely low input offset voltage. This device is classified as Obsolete, necessitating identification of functionally equivalent substitute components for ongoing design support and procurement continuity. The ICL7650CPD+ operates as a single-circuit amplifier in a 14-DIP through-hole package and is suitable for applications demanding low-drift performance across the 4.5V to 16V supply range.

Substiute Parts

ICL7650CPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 807ICL7650CPD+ 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 strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Amplifier Type: Zero-Drift or Chopper topology
• Package / Case: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Number of Circuits: 1
• Voltage - Supply Span: Minimum 4.5V, Maximum 16V
• Operating Temperature Range: Minimum 0°C to 70°C coverage

Secondary Compatibility Parameters:

• Slew Rate: 2.5V/µs or greater
• Gain Bandwidth Product: 1.9 MHz or greater
• Current - Input Bias: 4 pA or lower
• Voltage - Input Offset: 700 µV or lower
• Current - Supply: 2 mA or lower
• RoHS3 Compliance and MSL rating

All identified substitute parts meet or exceed the primary criteria. Variations in secondary parameters reflect design improvements in successor generations while maintaining functional compatibility within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TC7650CPD (Microchip Technology)

The TC7650CPD is the direct functional equivalent of the ICL7650CPD+. This device maintains identical electrical specifications including slew rate (2.5V/µs), gain bandwidth product (2 MHz), and supply voltage range (4.5V to 16V). The TC7650CPD is classified as Active product status, ensuring long-term availability and manufacturing support. It is ROHS3 compliant and carries MSL rating 1 (Unlimited), matching the original component's environmental specifications. The 14-PDIP package is directly compatible with existing through-hole PCB designs.

Secondary Recommendations: TLC2652 Series (Texas Instruments)

The TLC2652ACN, TLC2652AIN, and TLC2652CN represent enhanced zero-drift amplifier designs from Texas Instruments' LinCMOS™ series. These devices offer improved input offset voltage performance (0.5 to 0.6 µV versus 700 µV) and higher slew rate (3.1V/µs versus 2.5V/µs). All three variants maintain the 14-DIP package format and through-hole mounting compatibility. The TLC2652AIN provides extended operating temperature range (-40°C to 85°C), suitable for applications requiring broader thermal performance. The TLC2652ACN and TLC2652CN are classified as Last Time Buy, indicating limited future availability.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original ICL7650CPD+ specifications. Moisture sensitivity levels are appropriate for standard handling and storage conditions.

Frequently Asked Questions (FAQ)

Q1: Can the TC7650CPD directly replace the ICL7650CPD+ without circuit modifications?

A: Yes. The TC7650CPD is a direct functional equivalent with identical electrical specifications and 14-DIP package pinout. No circuit modifications are required for substitution in existing designs.

Q2: What are the key differences between the TC7650CPD and TLC2652 series?

A: The TC7650CPD maintains the original ICL7650CPD+ specifications exactly. The TLC2652 series offers improved performance characteristics: lower input offset voltage (0.5–0.6 µV versus 700 µV) and higher slew rate (3.1V/µs versus 2.5V/µs). Both families are compatible with the 14-DIP package and 4.5V to 16V supply range. Selection depends on whether enhanced performance or exact specification matching is required.

Q3: Why is the TLC2652AIN recommended for extended temperature applications?

A: The TLC2652AIN operates across -40°C to 85°C, compared to 0°C to 70°C for other variants. This extended range accommodates industrial and automotive environments requiring broader thermal performance while maintaining zero-drift amplifier functionality.

Q4: Are all substitute parts available in the same 14-DIP through-hole package?

A: Yes. All identified substitute parts are packaged in 14-DIP (0.300", 7.62mm) format with through-hole mounting, ensuring direct PCB compatibility with the original ICL7650CPD+ design.

Q5: What is the significance of "Last Time Buy" product status for TLC2652 variants?

A: Last Time Buy status indicates that Texas Instruments has announced end-of-life for these products. Existing inventory remains available for purchase, but future manufacturing is not planned. For long-term design continuity, the TC7650CPD (Active status) is the preferred substitute.

Q6: Do all substitute parts meet RoHS3 compliance requirements?

A: Yes. All identified substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental and regulatory compliance of the original ICL7650CPD+.