ICL7650BCPD Equivalent & Substitute Parts

Part Overview

The ICL7650BCPD is a chopper (zero-drift) amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in a 14-PDIP package. This single-circuit operational amplifier is designed for applications requiring extremely low input offset voltage and minimal drift characteristics. The ICL7650BCPD is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

ICL7650BCPD

Analog Devices Inc./Maxim IntegratedIn Stock: 1251ICL7650BCPD 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 ICL7650BCPD 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 direct socket compatibility.

Amplifier Classification: Substitute parts must be zero-drift or chopper amplifiers, as this architecture defines the low input offset voltage and drift characteristics essential to the ICL7650BCPD's function.

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

Electrical Operating Range: Substitute parts must support the supply voltage span of 4.5 V to 16 V minimum, ensuring compatibility with existing power supply designs.

Input Bias Current: Substitute parts must maintain input bias current at or below 1.5 pA to preserve the high-impedance input characteristics.

Gain Bandwidth Product: Substitute parts must support a gain bandwidth product of 2 MHz or greater to maintain frequency response performance.

Slew Rate: Substitute parts must achieve a slew rate of 2.5 V/µs or greater to preserve signal fidelity in dynamic applications.

The four substitute parts identified—TC7650CPD, TLC2652ACN, TLC2652AIN, and TLC2652CN—meet these substitution criteria while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

TC7650CPD (Microchip Technology): This part is the closest functional equivalent to the ICL7650BCPD, matching the slew rate (2.5 V/µs) and gain bandwidth product (2 MHz) exactly. The TC7650CPD maintains identical input bias current (1.5 pA) and supply voltage specifications. The part carries Active product status and ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete ICL7650BCPD. The TC7650CPD is the primary recommended substitute for direct replacement applications.

TLC2652ACN, TLC2652AIN, TLC2652CN (Texas Instruments): These three variants from the TLC2652 family offer zero-drift amplification with improved input offset voltage specifications (0.5–0.6 µV versus 700 µV) and lower supply current (1.5 mA versus 2 mA). All three parts carry ROHS3 compliance. The TLC2652 family exhibits higher slew rate (3.1 V/µs) and slightly lower gain bandwidth product (1.9 MHz). The TLC2652AIN supports an extended operating temperature range (-40°C ~ 85°C), making it suitable for applications requiring broader thermal performance. These parts are classified as Last Time Buy, indicating limited future availability. Selection among the three TLC2652 variants depends on specific temperature range requirements and packaging preferences.

Compliance Considerations: The ICL7650BCPD is RoHS non-compliant. All substitute parts are ROHS3 compliant, supporting modern procurement and environmental regulatory requirements. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the TC7650CPD directly replace the ICL7650BCPD in existing designs?

A: Yes. The TC7650CPD matches the ICL7650BCPD in slew rate, gain bandwidth product, input bias current, and supply voltage specifications. Both parts use the 14-DIP package and support identical operating temperature ranges (0°C ~ 70°C). Direct socket substitution is supported without circuit modification.

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

A: The TC7650CPD maintains exact electrical performance parity with the ICL7650BCPD (2.5 V/µs slew rate, 2 MHz gain bandwidth product, 1.5 pA input bias current). The TLC2652 family offers superior input offset voltage performance (0.5–0.6 µV versus 700 µV and 0.7 µV) and lower supply current consumption (1.5 mA versus 2 mA), but exhibits higher slew rate (3.1 V/µs) and slightly lower gain bandwidth product (1.9 MHz). The TLC2652 family is suitable for applications where lower offset voltage and reduced power consumption are beneficial.

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

A: The TLC2652AIN supports an operating temperature range of -40°C ~ 85°C, compared to 0°C ~ 70°C for the ICL7650BCPD and other substitutes. The TLC2652AIN is the appropriate selection for designs requiring operation beyond the standard 0°C ~ 70°C range.

Q: Are all substitute parts available in the same 14-DIP package?

A: Yes. All substitute parts—TC7650CPD, TLC2652ACN, TLC2652AIN, and TLC2652CN—are packaged in the 14-DIP (0.300", 7.62mm) through-hole configuration, ensuring mechanical and electrical compatibility with existing PCB layouts and socket designs.

Q: What is the product status of each substitute part?

A: The TC7650CPD carries Active product status, indicating ongoing manufacturing and long-term availability. The TLC2652ACN, TLC2652AIN, and TLC2652CN are classified as Last Time Buy, indicating limited future production and eventual discontinuation. For new designs requiring extended product lifecycle support, the TC7650CPD is the preferred selection.

Q: Do all substitute parts meet modern compliance standards?

A: Yes. All substitute parts are ROHS3 compliant and REACH Unaffected. The ICL7650BCPD is RoHS non-compliant. Substitution with any of the four identified parts upgrades compliance status to current regulatory standards.

Q: What is the significance of the input offset voltage differences among the substitutes?

A: The ICL7650BCPD specifies 700 µV input offset voltage. The TC7650CPD reduces this to 0.7 µV, and the TLC2652 family achieves 0.5–0.6 µV. Lower input offset voltage reduces DC error in precision measurement and signal conditioning applications. Applications sensitive to DC accuracy benefit from the improved specifications of the substitute parts.

Q: Can the TLC2652 family be used in applications where the TC7650CPD is specified?

A: The TLC2652 family meets the core substitution criteria (package, amplifier type, circuit count, supply voltage range, input bias current, and gain bandwidth product). However, the TLC2652 family exhibits different slew rate (3.1 V/µs versus 2.5 V/µs) and gain bandwidth product (1.9 MHz versus 2 MHz). Applications with strict slew rate or bandwidth requirements should prioritize the TC7650CPD for performance parity. Applications where improved offset voltage and lower power consumption are advantageous may select the TLC2652 family.