ICL7650SCPDZ Zero-Drift Operational Amplifier Equivalent & Substitute Parts

Part Overview

The ICL7650SCPDZ is a zero-drift operational amplifier manufactured by Renesas Electronics Corporation, housed in a 14-DIP package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The ICL7650SCPDZ delivers precision amplification with minimal input offset voltage and extremely low input bias current, suitable for applications requiring high accuracy signal conditioning.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Zero-Drift	—
Number of Circuits	1	—
Slew Rate	2.5	V/µs
Gain Bandwidth Product	2	MHz
Current - Input Bias	4	pA
Voltage - Input Offset	700	µV
Current - Supply	2	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Package / Case	14-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ICL7650SCPDZ is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: Zero-Drift classification
Number of Circuits: Single circuit configuration
Package / Case: 14-DIP form factor
Mounting Type: Through Hole
Supply Voltage Range: Minimum 4.5 V, Maximum 16 V
Operating Temperature Range: 0°C to 70°C minimum coverage
RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Parameters:

Slew Rate: 2.5 V/µs or greater
Gain Bandwidth Product: 2 MHz or greater
Input Bias Current: 4 pA or lower
Input Offset Voltage: 700 µV or lower
Supply Current: 2 mA or lower
Output Current: 30 mA or greater

Substitute parts are grouped into two categories: Manufacturer Recommended (direct replacement with identical package) and Similar (functionally equivalent with potential parameter improvements).

Parameter Comparison

Parameter	ICL7650SCPDZ	ICL7650SCPA-1Z	TC7650CPD	TLC2652ACN	TLC2652AIN	TLC2652CN	TLC2654CN
Manufacturer	Renesas	Renesas	Microchip	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	General Purpose
Package / Case	14-DIP	8-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP
Slew Rate (V/µs)	2.5	2.5	2.5	3.1	3.1	3.1	3.7
Gain Bandwidth Product (MHz)	2	2	2	1.9	1.9	1.9	1.9
Current - Input Bias (pA)	4	4	1.5	4	4	4	50
Voltage - Input Offset (µV)	700	700	0.7	0.5	0.5	0.6	5
Current - Supply (mA)	2	2	2	1.5	1.5	1.5	1.5
Current - Output / Channel (mA)	30	30	30	50	50	50	50
Voltage - Supply Span (Min)	4.5 V	4.5 V	4.5 V	3.8 V	3.8 V	3.8 V	4.6 V
Voltage - Supply Span (Max)	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Operating Temperature	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	-40 to 85°C	0 to 70°C	0 to 70°C
Product Status	Obsolete	Active	Active	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1: Manufacturer Recommended Substitute

The ICL7650SCPA-1Z (Renesas Electronics Corporation) is the primary recommended substitute. This part maintains identical electrical specifications and supply voltage range as the ICL7650SCPDZ. The key difference is package configuration: ICL7650SCPA-1Z uses an 8-DIP package versus the 14-DIP of the original. This substitute is suitable only when PCB layout can accommodate the smaller 8-DIP form factor. Product status is Active, ensuring long-term availability and supply chain stability.

Tier 2: Cross-Manufacturer Zero-Drift Alternatives

TC7650CPD (Microchip Technology) provides direct 14-DIP package compatibility with superior input offset voltage (0.7 µV versus 700 µV) and lower input bias current (1.5 pA versus 4 pA). This part maintains identical slew rate and gain bandwidth product. Product status is Active. Supply voltage range and operating temperature align with original specifications.

TLC2652ACN, TLC2652AIN, and TLC2652CN (Texas Instruments, LinCMOS™ series) offer improved slew rate (3.1 V/µs) and significantly lower input offset voltage (0.5–0.6 µV). These parts feature higher output current capability (50 mA versus 30 mA) and lower supply current (1.5 mA versus 2 mA). All maintain 14-DIP package compatibility. TLC2652AIN supports extended operating temperature range (-40°C to 85°C). Product status is Last Time Buy for all three variants.

Tier 3: General Purpose Alternative

TLC2654CN (Texas Instruments) is classified as General Purpose rather than Zero-Drift amplifier. This part is suitable only when zero-drift performance is not critical to application requirements. Input bias current (50 pA) and input offset voltage (5 µV) are significantly higher than the original specification. Product status is Last Time Buy.

Compliance and Certification:

All substitute parts are ROHS3 Compliant and REACH Unaffected, matching the environmental compliance profile of the ICL7650SCPDZ. All parts carry ECCN EAR99 classification and HTSUS code 8542.33.0001.

Frequently Asked Questions (FAQ)

Q: Can ICL7650SCPA-1Z directly replace ICL7650SCPDZ without PCB modification?

A: No. ICL7650SCPA-1Z uses an 8-DIP package while ICL7650SCPDZ uses 14-DIP. PCB layout and socket configuration must be modified to accommodate the smaller package. Electrical specifications are identical, but physical footprint differs.

Q: What is the primary advantage of TC7650CPD over the original ICL7650SCPDZ?

A: TC7650CPD delivers superior precision with input offset voltage of 0.7 µV compared to 700 µV in the ICL7650SCPDZ. Input bias current is also lower at 1.5 pA versus 4 pA. Both parts maintain identical slew rate, gain bandwidth product, and supply voltage range. Package compatibility is identical (14-DIP).

Q: Are TLC2652 variants suitable for all ICL7650SCPDZ applications?

A: TLC2652 variants (ACN, AIN, CN) are suitable when improved slew rate and lower input offset voltage enhance application performance. These parts maintain zero-drift amplifier classification and 14-DIP package compatibility. However, TLC2652AIN supports extended temperature range (-40°C to 85°C) while TLC2652ACN and TLC2652CN are limited to 0°C to 70°C, matching the original specification.

Q: Why is TLC2654CN listed as a substitute if it is General Purpose rather than Zero-Drift?

A: TLC2654CN is included as a functional alternative for applications where zero-drift performance is not required. Input bias current (50 pA) and input offset voltage (5 µV) are significantly higher, making this part unsuitable for precision measurement applications. Use only when application specifications permit relaxed offset and bias current tolerances.

Q: What is the inventory status of substitute parts?

A: ICL7650SCPA-1Z (5,760 pcs), TC7650CPD (1,486 pcs), TLC2652ACN (3,208 pcs), TLC2652AIN (1,110 pcs), TLC2652CN (5,042 pcs), and TLC2654CN (2,750 pcs) are all available as new original stock. ICL7650SCPDZ original part has 16,048 pcs in inventory but is classified as obsolete.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). Environmental compliance matches the original ICL7650SCPDZ specification.

Q: Which substitute offers the best long-term availability?

A: ICL7650SCPA-1Z and TC7650CPD both carry Active product status, indicating ongoing manufacturer support and production. TLC2652 variants and TLC2654CN are classified as Last Time Buy, indicating limited future availability. For new designs requiring long-term supply assurance, prioritize Active status parts.

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