ADA4004-2ARMZ Equivalent & Substitute Parts

Part Overview

The ADA4004-2ARMZ is a general purpose operational amplifier manufactured by Analog Devices Inc., featuring dual circuits in an 8-MSOP surface mount package. This device is classified as an iPolar® series amplifier with active product status and full RoHS3 compliance. The ADA4004-2ARMZ serves applications requiring low input bias current and low input offset voltage characteristics across industrial and commercial temperature ranges.

Substitute parts are identified based on matching mechanical compatibility, electrical performance envelope, and functional equivalence within the general purpose amplifier category. Substitution becomes necessary when the primary part experiences supply constraints, packaging format requirements, or when alternative manufacturers' solutions meet identical electrical specifications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	2.7	V/µs
Gain Bandwidth Product	12	MHz
Current - Input Bias	40	nA
Voltage - Input Offset	40	µV
Current - Output / Channel	10	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40°C ~ 125°C	—
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic for the ADA4004-2ARMZ is based on the following criteria:

Mechanical Compatibility: All substitute parts must feature surface mount technology with 8-pin packaging (8-TSSOP or 8-MSOP format, 0.118" width, 3.00mm) to ensure direct PCB footprint compatibility.

Electrical Envelope: Substitute parts must operate within the supply voltage range of 10V to 30V and support dual-circuit general purpose amplifier functionality.

Functional Equivalence: All candidates must be classified as general purpose operational amplifiers with two circuits per package and output current capability of 10 mA per channel.

Compliance Requirements: All substitute parts must maintain RoHS3 compliance and REACH unaffected status to satisfy regulatory requirements equivalent to the primary part.

The identified substitute parts (RC4558DGKR, RC4558DGKRG4, RC4558IDGKR) meet these mechanical and functional criteria. Performance variations in slew rate, gain bandwidth product, and input bias current are documented in the parameter comparison table to enable informed selection based on application requirements.

Parameter Comparison

Parameter	ADA4004-2ARMZ	RC4558DGKR	RC4558DGKRG4	RC4558IDGKR	Unit
Manufacturer	Analog Devices Inc.	Texas Instruments	Texas Instruments	Texas Instruments	—
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	—
Number of Circuits	2	2	2	2	—
Slew Rate	2.7	1.7	1.7	1.7	V/µs
Gain Bandwidth Product	12	3	3	3	MHz
Current - Input Bias	40	150	150	150	nA
Voltage - Input Offset	40	500	500	500	µV
Current - Output / Channel	10	10	10	10	mA
Voltage - Supply Span (Min)	10	10	10	10	V
Voltage - Supply Span (Max)	30	30	30	30	V
Operating Temperature (Min)	-40	0	0	-40	°C
Operating Temperature (Max)	125	70	70	85	°C
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	—
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	—
Product Status	Active	Active	Obsolete	Active	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

RC4558IDGKR (Recommended Primary Substitute)

The RC4558IDGKR from Texas Instruments is the preferred substitute for the ADA4004-2ARMZ. This part maintains active product status, ROHS3 compliance, and extends the operating temperature range to -40°C ~ 85°C, providing coverage for the ADA4004-2ARMZ minimum temperature specification. The RC4558IDGKR is available in Cut Tape & Digi-Reel® packaging with 37,750 units in stock, ensuring supply continuity. While the slew rate (1.7 V/µs), gain bandwidth product (3 MHz), input bias current (150 nA), and input offset voltage (500 µV) differ from the primary part, these parameters remain within acceptable general purpose amplifier specifications for most applications.

RC4558DGKR (Secondary Substitute)

The RC4558DGKR is an active product available in Tape & Reel packaging with 6,683 units in stock. This part shares identical electrical specifications with RC4558IDGKR but operates within a narrower temperature range (0°C ~ 70°C). Selection of RC4558DGKR is appropriate only for applications where the operating environment does not require the extended low-temperature performance of the ADA4004-2ARMZ.

RC4558DGKRG4 (Not Recommended)

The RC4558DGKRG4 carries obsolete product status and should not be selected for new designs or long-term production applications. Although 5,940 units remain in inventory, the obsolete classification indicates discontinued manufacturer support and potential future unavailability.

Frequently Asked Questions (FAQ)

Q: Can RC4558 series parts directly replace the ADA4004-2ARMZ in existing designs?

A: Direct PCB footprint replacement is possible due to identical 8-MSOP surface mount packaging. However, electrical performance differences must be evaluated. The RC4558 series exhibits lower slew rate (1.7 V/µs vs. 2.7 V/µs), lower gain bandwidth product (3 MHz vs. 12 MHz), and higher input bias current (150 nA vs. 40 nA). Applications sensitive to these parameters require circuit redesign or performance validation.

Q: What are the temperature range implications for substitution?

A: The ADA4004-2ARMZ operates from -40°C to 125°C. The RC4558IDGKR supports -40°C to 85°C, covering the minimum temperature but not the maximum. The RC4558DGKR operates only from 0°C to 70°C. Applications requiring full -40°C to 125°C operation cannot use RC4558 series substitutes without thermal management modifications or design changes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The ADA4004-2ARMZ and all three RC4558 variants (RC4558DGKR, RC4558DGKRG4, RC4558IDGKR) are ROHS3 compliant and REACH unaffected, satisfying equivalent regulatory requirements.

Q: What packaging formats are available for each substitute?

A: RC4558DGKR is supplied in Tape & Reel format. RC4558DGKRG4 is supplied in Cut Tape & Digi-Reel® format. RC4558IDGKR is supplied in Cut Tape & Digi-Reel® format. All maintain the same 8-MSOP physical footprint.

Q: Which substitute has the best inventory availability?

A: RC4558IDGKR has the highest inventory level at 37,750 units, followed by RC4558DGKR at 6,683 units and RC4558DGKRG4 at 5,940 units. The primary ADA4004-2ARMZ has 6,103 units in stock.

Q: Why do the RC4558 parts have lower gain bandwidth product than the ADA4004-2ARMZ?

A: The RC4558 series is a legacy general purpose amplifier design with 3 MHz gain bandwidth product, while the ADA4004-2ARMZ represents a more recent design with 12 MHz bandwidth. This difference reflects design generation and manufacturing process improvements. Applications requiring higher bandwidth must retain the ADA4004-2ARMZ or select alternative high-speed amplifiers.

Q: Is the RC4558DGKRG4 suitable for new production designs?

A: No. The obsolete product status indicates the manufacturer has discontinued this part. New designs should use RC4558IDGKR or RC4558DGKR for active product support and long-term availability assurance.

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