ICL7650CSD Zero-Drift Operational Amplifier Equivalent & Substitute Parts

Part Overview

The ICL7650CSD is a zero-drift operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in a 14-SOIC surface mount package. This single-circuit amplifier is designed for precision applications requiring minimal input offset voltage and low input bias current. The product is currently obsolete, making identification of compatible substitute components essential for design continuity and procurement planning. Obsolete status necessitates evaluation of functionally equivalent alternatives that maintain electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

ICL7650CSD

Analog Devices Inc./Maxim IntegratedIn Stock: 2145ICL7650CSD Datasheet

Current PartRFQ

TLC2652AC-14D

Texas InstrumentsIn Stock: 2197TLC2652AC-14D Datasheet

MFR RecommendedRFQ

TLC2652AI-14D

Texas InstrumentsIn Stock: 962TLC2652AI-14D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the ICL7650CSD are selected based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

Primary Compatibility Criteria:

• Amplifier Type: Zero-Drift architecture
• Number of Circuits: Single circuit (1)
• Package / Case: 14-SOIC form factor with identical 0.154" (3.90mm) width
• Mounting Type: Surface Mount
• Supply Voltage Range: Minimum 4.5V to maximum 16V operation capability
• Operating Temperature: Minimum 0°C operation (upper limit may exceed 70°C)

Secondary Electrical Parameters:

• Slew Rate: Minimum 2.5V/µs
• Gain Bandwidth Product: Minimum 1.9 MHz
• Input Bias Current: Maximum 4 pA
• Input Offset Voltage: Maximum 700 µV
• Supply Current: Maximum 1.5 mA

The substitute parts TLC2652AC-14D and TLC2652AI-14D from Texas Instruments meet all primary compatibility criteria and satisfy secondary electrical parameter requirements within acceptable engineering tolerances for zero-drift amplifier applications.

Parameter Comparison

Engineering Selection Recommendations

TLC2652AI-14D (Primary Recommendation)

The TLC2652AI-14D is the preferred substitute for new designs and procurement. This component is in Active product status, ensuring long-term availability and supply chain stability. It provides ROHS3 compliance, meeting current environmental and regulatory requirements. The extended operating temperature range (-40°C to 85°C) exceeds the original ICL7650CSD specification (0°C to 70°C), offering greater flexibility for diverse application environments. Electrical parameters are superior to the original part, with input offset voltage of 0.5 µV compared to 700 µV, and slew rate of 3.1 V/µs versus 2.5 V/µs. The 14-SOIC package is mechanically identical, enabling direct PCB layout compatibility.

TLC2652AC-14D (Secondary Recommendation)

The TLC2652AC-14D serves as an alternative substitute with Last Time Buy status. This component maintains identical electrical specifications to the TLC2652AI-14D and provides ROHS3 compliance. However, the operating temperature range is limited to 0°C to 70°C, matching the original ICL7650CSD specification. This part is suitable for applications with defined temperature operating windows within this range. Procurement should prioritize the TLC2652AI-14D due to its Active status and extended temperature capability.

Compliance Considerations

Both substitute parts are ROHS3 compliant, addressing modern regulatory requirements that the obsolete ICL7650CSD does not meet. Both components are REACH Unaffected and classified as EAR99 for export control purposes, matching the original part's regulatory classification.

Frequently Asked Questions (FAQ)

Q: Can the TLC2652AI-14D or TLC2652AC-14D be used as direct replacements for the ICL7650CSD?

A: Yes, both parts are direct substitutes. They share identical 14-SOIC package geometry, surface mount configuration, and zero-drift amplifier architecture. Electrical parameters are compatible within the specified operating ranges. No PCB layout modifications are required.

Q: What is the difference between TLC2652AI-14D and TLC2652AC-14D?

A: The primary difference is operating temperature range. TLC2652AI-14D operates from -40°C to 85°C, while TLC2652AC-14D operates from 0°C to 70°C. Both have identical electrical specifications. TLC2652AI-14D is in Active status; TLC2652AC-14D is Last Time Buy. For new designs, TLC2652AI-14D is recommended.

Q: Are there any electrical performance differences between the ICL7650CSD and the substitute parts?

A: The substitute parts offer improved electrical performance. Input offset voltage is reduced from 700 µV to 0.5 µV, and slew rate increases from 2.5 V/µs to 3.1 V/µs. Gain bandwidth product is slightly lower (1.9 MHz vs. 2 MHz), but remains within acceptable parameters for zero-drift amplifier applications. These improvements enhance precision and speed characteristics.

Q: Is the 14-SOIC package identical across all three parts?

A: Yes. All three parts use 14-SOIC packaging with 0.154" (3.90mm) width. Package dimensions, pin configuration, and surface mount footprint are identical, ensuring mechanical and electrical compatibility on existing PCBs.

Q: What is the significance of the RoHS compliance difference?

A: The ICL7650CSD is RoHS non-compliant, while both substitute parts are ROHS3 compliant. This means the substitute parts meet current environmental regulations restricting hazardous substances. For applications subject to RoHS requirements or future regulatory compliance, the substitute parts are necessary.

Q: Which substitute part should be selected for new product designs?

A: TLC2652AI-14D is the recommended choice for new designs. It is in Active product status, ensuring availability throughout the product lifecycle. The extended operating temperature range (-40°C to 85°C) provides greater application flexibility. ROHS3 compliance meets current regulatory standards.

Q: Can the ICL7650CSD be used in applications requiring temperatures below 0°C or above 70°C?

A: No. The ICL7650CSD is specified for 0°C to 70°C operation only. For applications requiring extended temperature ranges, TLC2652AI-14D (-40°C to 85°C) is the appropriate substitute.

Q: Are there any supply chain considerations for these substitute parts?

A: Yes. The ICL7650CSD is obsolete with no future availability. TLC2652AC-14D is Last Time Buy, indicating limited remaining inventory. TLC2652AI-14D is Active with ongoing production and supply. For procurement planning, TLC2652AI-14D ensures long-term component availability.