ICL7650SCPD Zero-Drift Amplifier Equivalent & Substitute Parts

Part Overview

The ICL7650SCPD is a zero-drift operational amplifier manufactured by Renesas Electronics Corporation, housed in a 14-DIP through-hole package. This device is classified as obsolete, indicating discontinued production and limited availability for new designs. The ICL7650SCPD delivers single-circuit amplification with a 2 MHz gain bandwidth product and 2.5 V/µs slew rate, designed for precision analog applications requiring minimal input offset voltage and bias current.

Due to its obsolete status, equivalent substitute parts are necessary for ongoing production support, design continuity, and component procurement. Active and last-time-buy alternatives provide functional compatibility while offering improved specifications or enhanced compliance certifications.

Substiute Parts

ICL7650SCPD

Renesas Electronics CorporationIn Stock: 8301ICL7650SCPD Datasheet

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TC7650CPD

Microchip TechnologyIn Stock: 1504TC7650CPD Datasheet

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TLC2652ACN

Texas InstrumentsIn Stock: 3220TLC2652ACN Datasheet

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TLC2652AIN

Texas InstrumentsIn Stock: 1220TLC2652AIN Datasheet

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TLC2652CN

Texas InstrumentsIn Stock: 5077TLC2652CN Datasheet

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TLC2654CN

Texas InstrumentsIn Stock: 2768TLC2654CN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ICL7650SCPD is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package type: 14-DIP (0.300", 7.62mm) through-hole mounting
• Amplifier classification: Zero-drift or equivalent precision amplifier topology
• Number of circuits: Single-circuit configuration
• Supply voltage range: Minimum 4.5 V to maximum 16 V overlap
• Operating temperature range: Minimum 0°C to 70°C coverage

Substitution Logic:

The TC7650CPD (Microchip Technology) qualifies as a direct substitute, maintaining identical package geometry, zero-drift amplifier type, single-circuit configuration, and matching supply voltage specifications. This part is active and RoHS3 compliant, providing superior input offset voltage (0.7 µV versus 700 µV) and lower input bias current (1.5 pA versus 4 pA).

The TLC2652 series (Texas Instruments) variants—TLC2652AIN, TLC2652CN, and TLC2652ACN—function as compatible substitutes with the same 14-DIP package and zero-drift amplifier topology. These parts operate within the required supply voltage range and maintain single-circuit configuration. All TLC2652 variants are RoHS3 compliant and carry last-time-buy status. The TLC2652AIN extends the operating temperature range to −40°C to 85°C, providing broader thermal coverage.

The TLC2654CN (Texas Instruments) represents a functional alternative with general-purpose amplifier classification rather than zero-drift topology. It maintains package compatibility, single-circuit configuration, and supply voltage specifications. This part is RoHS3 compliant and last-time-buy status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TC7650CPD

The TC7650CPD (Microchip Technology) is the preferred substitute for the obsolete ICL7650SCPD. This part maintains identical electrical specifications for slew rate (2.5 V/µs) and gain bandwidth product (2 MHz), ensuring direct functional compatibility. The TC7650CPD is currently in active production status, providing long-term availability and supply chain stability. RoHS3 compliance satisfies modern regulatory requirements, whereas the ICL7650SCPD is RoHS non-compliant. Superior electrical performance—input offset voltage of 0.7 µV and input bias current of 1.5 pA—exceeds the original specification. Through-hole 14-DIP packaging and supply voltage range (4.5 V to 16 V) are identical.

Secondary Recommendation: TLC2652AIN

The TLC2652AIN (Texas Instruments) qualifies as a secondary substitute when extended operating temperature range is required. This part extends thermal coverage to −40°C to 85°C, compared to the ICL7650SCPD's 0°C to 70°C range. Zero-drift amplifier topology and 14-DIP package ensure functional compatibility. RoHS3 compliance and last-time-buy status are established. Input offset voltage (0.5 µV) and input bias current (4 pA) meet or exceed original specifications. Slew rate (3.1 V/µs) and gain bandwidth product (1.9 MHz) provide comparable performance with marginal variations.

Tertiary Recommendation: TLC2652CN or TLC2652ACN

The TLC2652CN and TLC2652ACN (Texas Instruments) function as compatible alternatives with identical zero-drift amplifier topology and 14-DIP package configuration. Both parts are RoHS3 compliant and last-time-buy status. Operating temperature range remains 0°C to 70°C, matching the original specification. Input offset voltage (0.6 µV and 0.5 µV respectively) and input bias current (4 pA) provide superior performance. These parts are suitable for applications where extended temperature range is not required.

Alternative Consideration: TLC2654CN

The TLC2654CN (Texas Instruments) represents a functional alternative when general-purpose amplifier characteristics are acceptable. This part differs in amplifier classification (general purpose versus zero-drift) and exhibits higher input bias current (50 pA) and input offset voltage (5 µV). Package compatibility, supply voltage range, and RoHS3 compliance are maintained. Selection of this part requires verification that precision amplifier characteristics are not critical to circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the TC7650CPD directly replace the ICL7650SCPD without circuit modification?

A: Yes. The TC7650CPD maintains identical slew rate (2.5 V/µs), gain bandwidth product (2 MHz), supply voltage range (4.5 V to 16 V), and 14-DIP through-hole package geometry. Pin configuration and electrical interface are compatible. Superior input offset voltage and input bias current specifications ensure equivalent or improved circuit performance.

Q: What is the difference between zero-drift and general-purpose amplifier types?

A: Zero-drift amplifiers employ chopper-stabilization or auto-zeroing techniques to minimize input offset voltage and drift over temperature. General-purpose amplifiers lack these techniques and exhibit higher input offset voltage and temperature drift. The ICL7650SCPD is zero-drift; the TLC2654CN is general-purpose. Selection depends on circuit precision requirements.

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

A: The TLC2652AIN operates from −40°C to 85°C, whereas the ICL7650SCPD and most alternatives operate from 0°C to 70°C. Applications requiring operation below 0°C or above 70°C must use the TLC2652AIN to maintain specified electrical performance across the full temperature range.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The TC7650CPD, TLC2652AIN, TLC2652CN, TLC2652ACN, and TLC2654CN are all RoHS3 compliant. The original ICL7650SCPD is RoHS non-compliant. RoHS3 compliance is required for new designs and procurement in regulated markets.

Q: What is the significance of "last-time-buy" product status?

A: Last-time-buy status indicates that the manufacturer has announced end-of-life production. Existing inventory is available for purchase, but no future production is planned. The TLC2652 series and TLC2654CN carry this status. The TC7650CPD is in active production, providing indefinite availability.

Q: Can the TLC2654CN be used as a direct substitute despite being general-purpose rather than zero-drift?

A: The TLC2654CN is functionally compatible in package and pin configuration but differs in amplifier topology. Input offset voltage (5 µV) and input bias current (50 pA) are significantly higher than the ICL7650SCPD. Use this part only when circuit design does not require zero-drift precision characteristics or when higher offset voltage is acceptable.

Q: What are the key electrical differences between the substitute parts?

A: Input offset voltage ranges from 0.5 µV (TLC2652ACN, TLC2652AIN) to 5 µV (TLC2654CN), compared to 700 µV for the ICL7650SCPD. Input bias current ranges from 1.5 pA (TC7650CPD) to 50 pA (TLC2654CN), compared to 4 pA for the original. Slew rate varies from 2.5 V/µs (TC7650CPD) to 3.7 V/µs (TLC2654CN). All parts maintain compatible supply voltage ranges and 14-DIP packaging.

Q: Is the 14-DIP package still widely supported in modern PCB designs?

A: The 14-DIP through-hole package remains standard for operational amplifier applications. All substitute parts use identical 14-DIP (0.300", 7.62mm) packaging, ensuring direct PCB compatibility without layout modification. Through-hole mounting is suitable for both prototype and production environments.

Q: What inventory status should influence substitution decisions?

A: The TC7650CPD (1,486 pcs) is in active production. The TLC2652 series variants range from 1,110 to 5,042 pcs with last-time-buy status. The TLC2654CN has 2,750 pcs available. For long-term production, the TC7650CPD is preferred due to active status. For immediate availability, all parts have adequate inventory.