APX4558IS-13 Equivalent & Substitute Parts

Part Overview

The APX4558IS-13 is a general purpose operational amplifier manufactured by Diodes Incorporated, configured as a dual-channel (2 circuit) device in an 8-SOIC surface mount package. This part is classified as obsolete, indicating it is no longer in active production. The APX4558IS-13 operates across a wide supply voltage range of 5V to 30V and is rated for industrial temperature applications from -40°C to 105°C. Due to its obsolete status, identification of functionally equivalent active alternatives is necessary for design continuity, new production builds, and long-term supply chain reliability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	1.7	V/µs
Gain Bandwidth Product	3	MHz
Current - Input Bias	150	nA
Voltage - Input Offset	500	µV
Current - Supply (per Channel)	2.5	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	5	V
Voltage - Supply Span (Max)	30	V
Operating Temperature Range	-40 to 105	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	3 (168 Hours)	—

Substitute Part Grouping Explanation

Substitution of the APX4558IS-13 is determined by the following critical parameters: dual-channel configuration (2 circuits), 8-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm width), compatible supply voltage range, and operating temperature coverage. The APX4558IS-13 operates with a minimum supply voltage of 5V and maximum of 30V, establishing the lower and upper bounds for acceptable substitutes.

Substitute parts are grouped into two functional categories:

Category 1: General Purpose Amplifiers (AD8672 Series) These parts maintain the general purpose amplifier classification and are optimized for low input offset voltage and low input bias current. They operate within the 10V to 36V supply range, which encompasses the APX4558IS-13 operating window. These substitutes provide enhanced performance characteristics including higher gain bandwidth product (10 MHz), lower input offset voltage (20 µV), and extended temperature rating to 125°C.

Category 2: J-FET Input Amplifiers (AD8512 Series) These parts employ J-FET input stages, delivering significantly lower input bias current (25 pA versus 150 nA) and higher slew rate (20 V/µs versus 1.7 V/µs). The AD8512 series operates within the 10V to 30V supply range, which overlaps with the APX4558IS-13 specification. Multiple packaging options are available including tube, tape & reel, and cut tape with Digi-Reel formats.

Category 3: iPolar General Purpose Amplifier (ADA4004-2 Series) This part represents a specialized general purpose topology with rail-to-rail input capability. It operates within the 10V to 30V supply range and provides a gain bandwidth product of 12 MHz with exceptionally low input offset voltage (40 µV).

All substitute parts are manufactured by Analog Devices Inc., maintain ROHS3 compliance, and are classified as active products with unlimited moisture sensitivity rating (MSL 1).

Parameter Comparison

Parameter	APX4558IS-13	AD8512ARZ	AD8512BRZ	AD8672ARZ	ADA4004-2ARZ
Manufacturer	Diodes Inc.	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Product Status	Obsolete	Active	Active	Active	Active
Amplifier Type	General Purpose	J-FET	J-FET	General Purpose	General Purpose
Number of Circuits	2	2	2	2	2
Slew Rate (V/µs)	1.7	20	20	4	2.7
Gain Bandwidth Product (MHz)	3	8	8	10	12
Current - Input Bias (nA)	150	0.025	0.025	3	40
Voltage - Input Offset (µV)	500	100	80	20	40
Current - Supply per Channel (mA)	2.5	2.2	2.2	3	—
Current - Output / Channel (mA)	30	70	70	20	10
Voltage - Supply Span Min (V)	5	10	10	10	10
Voltage - Supply Span Max (V)	30	30	30	36	30
Operating Temperature Range (°C)	-40 to 105	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Functional Replacement with Enhanced Performance:

The AD8672ARZ and AD8672ARZ-REEL series represent the most direct functional replacement for the APX4558IS-13. Both parts maintain the general purpose amplifier classification, dual-channel configuration, and 8-SOIC package footprint. The AD8672 series provides measurable performance improvements including 3.3× higher gain bandwidth product (10 MHz versus 3 MHz), 25× lower input offset voltage (20 µV versus 500 µV), and extended operating temperature to 125°C. Supply voltage compatibility is maintained within the 10V to 30V range, which overlaps the APX4558IS-13 specification window. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

For Applications Requiring Ultra-Low Input Bias Current:

The AD8512ARZ, AD8512ARZ-REEL, AD8512ARZ-REEL7, AD8512BRZ, AD8512BRZ-REEL, and AD8512BRZ-REEL7 series employ J-FET input architecture, delivering 6000× lower input bias current (25 pA versus 150 nA) and 11.8× higher slew rate (20 V/µs versus 1.7 V/µs). These parts are suitable for applications where input bias current leakage is a critical design constraint. All AD8512 variants operate within the 10V to 30V supply range and are active products with ROHS3 compliance.

For Applications Requiring Maximum Gain Bandwidth Product:

The ADA4004-2ARZ provides the highest gain bandwidth product among available substitutes at 12 MHz, combined with exceptionally low input offset voltage (40 µV). This part is classified as an iPolar general purpose amplifier and operates within the 10V to 30V supply range. It is an active product with ROHS3 compliance.

All recommended substitutes are active products manufactured by Analog Devices Inc., ensuring long-term availability and supply chain continuity. All parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original APX4558IS-13 environmental classification.

Frequently Asked Questions (FAQ)

Q: Can the AD8672ARZ be used as a direct pin-for-pin replacement for the APX4558IS-13?

A: Yes. Both parts feature identical 8-SOIC package dimensions (0.154", 3.90mm width) and dual-channel configuration. Pin assignments are compatible for standard operational amplifier applications. The AD8672ARZ operates within the 10V to 30V supply range, which encompasses the APX4558IS-13 operating window. However, circuit performance will improve due to higher gain bandwidth product and lower input offset voltage.

Q: What is the primary difference between the AD8512 and AD8672 substitute series?

A: The AD8512 series employs J-FET input stages, delivering extremely low input bias current (25 pA) and high slew rate (20 V/µs). The AD8672 series uses general purpose input architecture with lower input bias current (3 nA) and moderate slew rate (4 V/µs). Selection depends on application requirements: J-FET inputs are preferred for high-impedance signal sources or applications sensitive to input bias current; general purpose inputs are suitable for standard signal conditioning applications.

Q: Are there packaging format options available for the substitute parts?

A: Yes. The AD8512 and AD8672 series are available in multiple packaging formats: tube (standard), tape & reel (TR), and cut tape with Digi-Reel (CT). Specific part numbers include suffixes indicating packaging: no suffix for tube, -REEL for tape & reel, and -REEL7 for cut tape with Digi-Reel. Select the packaging format matching your procurement and assembly requirements.

Q: What is the moisture sensitivity level difference between the APX4558IS-13 and substitute parts?

A: The APX4558IS-13 has a moisture sensitivity level (MSL) of 3, requiring storage at controlled humidity for 168 hours maximum. All recommended substitute parts have MSL 1 (unlimited), indicating superior moisture resistance and more flexible storage requirements. This represents an improvement in handling and storage convenience.

Q: Does the extended operating temperature range of substitute parts affect circuit design?

A: The APX4558IS-13 operates to 105°C maximum; all substitute parts operate to 125°C. This extended range provides additional design margin for applications operating at elevated temperatures. If your circuit is designed for the APX4558IS-13 temperature range, the substitute parts will operate reliably within that same range with improved performance stability at higher temperatures.

Q: What is the minimum supply voltage requirement for substitute parts?

A: All recommended substitute parts require a minimum supply voltage of 10V, compared to 5V for the APX4558IS-13. If your application operates at 5V to 10V supply levels, the substitute parts are not compatible. For applications operating at 10V or higher, all substitutes are fully compatible within the 10V to 30V range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts (AD8512 series, AD8672 series, and ADA4004-2ARZ) are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the APX4558IS-13.

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