ICL7650SCBA-1 Zero-Drift Operational Amplifier Equivalent & Substitute Parts

Part Overview

The ICL7650SCBA-1 is a zero-drift operational amplifier manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface mount package. This device is classified as obsolete, indicating discontinuation from active production. The zero-drift amplifier architecture provides ultra-low input offset voltage of 0.7 µV with minimal input bias current of 4 pA, making it suitable for precision analog signal conditioning applications requiring high accuracy over temperature and time.

Due to the obsolete product status of the ICL7650SCBA-1, identification of equivalent and substitute parts is necessary for ongoing design support, production continuity, and component procurement. Active alternative devices with compatible electrical and mechanical specifications are available from both Renesas Electronics and Texas Instruments.

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	0.7	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
Mounting Type	Surface Mount	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ICL7650SCBA-1 is determined by the following critical parameters:

Mechanical Compatibility:

Package type: 8-SOIC surface mount form factor
Package dimensions: 0.154" width, 3.90mm width
Mounting type: Surface mount

Electrical Compatibility:

Amplifier type: Zero-drift architecture
Number of circuits: Single circuit (1)
Input bias current: 4 pA (matching specification)
Supply voltage range: Minimum 4.5 V to maximum 16 V
Operating temperature range: 0°C to 70°C (baseline requirement)

Functional Parameters:

Slew rate: 2.5 V/µs or higher
Gain bandwidth product: 1.9 MHz or higher
Input offset voltage: 0.7 µV or lower
Output current capability: 30 mA or higher

Substitute parts are grouped into two categories: direct manufacturer equivalents from Renesas Electronics and functionally equivalent alternatives from Texas Instruments. All substitute parts maintain the 8-SOIC package format and zero-drift amplifier topology. Texas Instruments TLC2652 series devices provide enhanced electrical performance in several parameters while maintaining functional compatibility within the specified operating envelope.

Parameter Comparison

Parameter	ICL7650SCBA-1	ICL7650SCBA-1Z	TLC2652AC-8D	TLC2652AI-8D	TLC2652AI-8DR	TLC2652C-8D	TLC2652C-8DR	TLC2652I-8D	TLC2652I-8DR	TLC2652Q-8D	TLC2652Q-8DG4
Manufacturer	Renesas	Renesas	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift	Zero-Drift
Number of Circuits	1	1	1	1	1	1	1	1	1	1	1
Slew Rate (V/µs)	2.5	2.5	3.1	3.1	3.1	3.1	3.1	3.1	3.1	3.1	3.1
Gain Bandwidth Product (MHz)	2	2	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9	1.9
Current - Input Bias (pA)	4	4	4	4	4	4	4	4	4	4	4
Voltage - Input Offset (µV)	0.7	0.7	0.5	0.5	0.5	0.6	0.6	0.6	0.6	0.6	0.6
Current - Supply (mA)	2	2	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5
Current - Output / Channel (mA)	30	30	50	50	50	50	50	50	50	50	50
Voltage - Supply Span Min (V)	4.5	4.5	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8
Voltage - Supply Span Max (V)	16	16	16	16	16	16	16	16	16	16	16
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 125	-40 to 125
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Last Time Buy	Last Time Buy

Engineering Selection Recommendations

Primary Recommendation: ICL7650SCBA-1Z

The ICL7650SCBA-1Z is the direct manufacturer equivalent from Renesas Electronics Corporation. This part maintains identical electrical specifications to the obsolete ICL7650SCBA-1, including slew rate of 2.5 V/µs, gain bandwidth product of 2 MHz, and input offset voltage of 0.7 µV. The ICL7650SCBA-1Z is currently in active production status, ensuring long-term availability and supply chain continuity. The primary distinction is RoHS3 compliance, which satisfies modern regulatory requirements. This part is the optimal choice for direct replacement in existing designs without circuit modification.

Secondary Recommendation: TLC2652 Series (Texas Instruments)

The Texas Instruments TLC2652 series provides functionally equivalent zero-drift amplifier performance with enhanced electrical characteristics. All TLC2652 variants maintain the 8-SOIC package format and single-circuit configuration. Key advantages include:

Improved slew rate: 3.1 V/µs (versus 2.5 V/µs in ICL7650SCBA-1)
Enhanced output current capability: 50 mA (versus 30 mA in ICL7650SCBA-1)
Reduced supply current: 1.5 mA (versus 2 mA in ICL7650SCBA-1)
Lower minimum supply voltage: 3.8 V (versus 4.5 V in ICL7650SCBA-1)
Input offset voltage: 0.5 to 0.6 µV (comparable to 0.7 µV specification)

All TLC2652 variants are RoHS3 compliant and carry active or last-time-buy product status.

Temperature Range Selection:

TLC2652C-8D / TLC2652C-8DR: Operating range 0°C to 70°C (matches ICL7650SCBA-1 specification)
TLC2652AI-8D / TLC2652AI-8DR / TLC2652I-8D / TLC2652I-8DR: Operating range -40°C to 85°C (extended low-temperature capability)
TLC2652Q-8D / TLC2652Q-8DG4: Operating range -40°C to 125°C (extended high-temperature capability)

Packaging Format Selection:

Tube packaging: ICL7650SCBA-1Z, TLC2652AC-8D, TLC2652AI-8D, TLC2652C-8D, TLC2652Q-8D, TLC2652Q-8DG4
Tape & Reel (TR): TLC2652C-8DR, TLC2652AI-8DR, TLC2652I-8DR
Unspecified packaging: TLC2652I-8D

Frequently Asked Questions (FAQ)

Q: Can I directly replace ICL7650SCBA-1 with ICL7650SCBA-1Z without circuit modification?

A: Yes. The ICL7650SCBA-1Z is the direct manufacturer equivalent with identical electrical specifications and 8-SOIC package format. No circuit modification is required. The primary difference is RoHS3 compliance status.

Q: What are the key differences between ICL7650SCBA-1 and TLC2652 series devices?

A: The TLC2652 series offers improved performance in three areas: slew rate (3.1 V/µs versus 2.5 V/µs), output current capability (50 mA versus 30 mA), and supply current efficiency (1.5 mA versus 2 mA). Input offset voltage and input bias current specifications are equivalent. All devices maintain the 8-SOIC package format and zero-drift amplifier architecture. TLC2652 devices support lower minimum supply voltage (3.8 V versus 4.5 V).

Q: Which TLC2652 variant should I select for my application?

A: Selection depends on three factors: (1) Operating temperature range required—choose TLC2652C for 0°C to 70°C, TLC2652AI or TLC2652I for -40°C to 85°C, or TLC2652Q for -40°C to 125°C; (2) Packaging format—choose tube for standard applications, tape & reel for high-volume production; (3) Product status—TLC2652Q variants are last-time-buy, while TLC2652C and TLC2652AI variants are active production.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (ICL7650SCBA-1Z and all TLC2652 variants) are RoHS3 compliant. The original ICL7650SCBA-1 is RoHS non-compliant.

Q: What is the difference between TLC2652I-8D and TLC2652I-8DR?

A: Both parts are identical in electrical specifications and operating temperature range (-40°C to 85°C). The primary difference is packaging format: TLC2652I-8D has unspecified packaging, while TLC2652I-8DR is supplied in Tape & Reel (TR) format for automated assembly processes.

Q: Can I use TLC2652Q-8D in applications requiring only 0°C to 70°C operation?

A: Yes. The TLC2652Q-8D operates across -40°C to 125°C, which encompasses the 0°C to 70°C range. However, this part is in last-time-buy status, indicating limited future availability. For new designs, TLC2652C-8D or TLC2652AI-8D are preferred for active production status.

Q: What is the significance of the -1Z suffix on ICL7650SCBA-1Z?

A: The -1Z suffix indicates the RoHS3 compliant version of the ICL7650SCBA base product. This designation distinguishes it from the original ICL7650SCBA-1 (RoHS non-compliant) while maintaining identical electrical performance.

Q: Are there any supply voltage compatibility issues when substituting with TLC2652 devices?

A: The TLC2652 series supports a lower minimum supply voltage (3.8 V) compared to ICL7650SCBA-1 (4.5 V minimum). This provides greater design flexibility. The maximum supply voltage remains 16 V for all devices. Existing designs operating at 4.5 V to 16 V are fully compatible with TLC2652 substitutes.

Q: What inventory levels are available for each substitute part?

A: Current inventory levels are: ICL7650SCBA-1Z (2,200 units), TLC2652AC-8D (2,038 units), TLC2652AI-8D (1,023 units), TLC2652AI-8DR (5,660 units), TLC2652C-8D (1,023 units), TLC2652C-8DR (893 units), TLC2652I-8D (1,547 units), TLC2652I-8DR (1,582 units), TLC2652Q-8D (843 units), TLC2652Q-8DG4 (6,543 units).

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