ISL28486FAZ Equivalent & Substitute Parts

Part Overview

The ISL28486FAZ is a general-purpose operational amplifier manufactured by Renesas Electronics Corporation, configured as a 4-circuit rail-to-rail amplifier in a 16-QSOP surface mount package. This device is classified as obsolete, necessitating identification of active substitute components for new designs and ongoing production requirements. The ISL28486FAZ operates across a 2.4 V to 5 V supply range with a slew rate of 0.17 V/µs and gain bandwidth product of 400 kHz, making it suitable for low-speed analog signal processing applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISL28486FAZ
Manufacturer	Renesas Electronics Corporation
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	4
Output Type	Rail-to-Rail
Package / Case	16-SSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.17 V/µs
Gain Bandwidth Product	400 kHz
Current - Input Bias	500 pA
Voltage - Input Offset	20 µV
Current - Supply	240 µA
Current - Output / Channel	31 mA
Voltage - Supply Span (Min)	2.4 V
Voltage - Supply Span (Max)	5 V
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the ISL28486FAZ is determined by the following critical parameters:

Primary Compatibility Criteria:

Number of circuits: 4 independent amplifier channels
Output type: Rail-to-rail output capability
Package type: 16-pin surface mount (QSOP or SSOP variants)
Supply voltage range: Minimum 2.4 V to maximum 5 V overlap
Operating temperature range: Support for -40°C to 125°C or compatible subset
Mounting type: Surface mount technology

Substitution Logic:

Substitute parts are grouped into two categories based on electrical performance characteristics:

Category A - Higher Performance Substitutes (AD8604 Series): These CMOS amplifiers offer significantly enhanced slew rate (6 V/µs) and gain bandwidth product (8.4 MHz), with improved input bias current (0.2 pA). These parts are suitable for applications requiring faster signal processing while maintaining rail-to-rail output and 4-circuit configuration. Supply voltage range extends to 5.5 V maximum.

Category B - Lower Power Substitutes (LTC6079 Series): These CMOS amplifiers prioritize reduced power consumption (55 µA total supply current versus 240 µA for the main part) with comparable slew rate (0.05 V/µs) and gain bandwidth product (750 kHz). The LTC6079HGN variants support the full -40°C to 125°C temperature range. These parts are suitable for battery-powered and low-power applications.

Category C - Ultra-Low Power Substitutes (OPA4336 Series): These CMOS amplifiers provide the lowest power consumption (20 µA total supply current) with minimal slew rate (0.03 V/µs) and gain bandwidth product (100 kHz). Suitable for extremely power-constrained applications with slower signal requirements. Operating temperature limited to -40°C to 85°C.

All substitute parts maintain ROHS3 compliance and surface mount packaging in 16-pin configurations.

Parameter Comparison

Parameter	ISL28486FAZ	AD8604ARQZ	AD8604ARQZ-RL	LTC6079CGN#PBF	LTC6079CGN#TRPBF	LTC6079HGN#PBF	LTC6079HGN#TRPBF	LTC6079IGN#PBF	LTC6079IGN#TRPBF	OPA4336EA/250	OPA4336EA/2K5
Manufacturer	Renesas	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate	0.17 V/µs	6 V/µs	6 V/µs	0.05 V/µs	0.05 V/µs	0.05 V/µs	0.05 V/µs	0.05 V/µs	0.05 V/µs	0.03 V/µs	0.03 V/µs
Gain Bandwidth Product	400 kHz	8.4 MHz	8.4 MHz	750 kHz	750 kHz	750 kHz	750 kHz	750 kHz	750 kHz	100 kHz	100 kHz
Current - Input Bias	500 pA	0.2 pA	0.2 pA	0.2 pA	0.2 pA	0.2 pA	0.2 pA	0.2 pA	0.2 pA	1 pA	1 pA
Voltage - Input Offset	20 µV	80 µV	80 µV	30 µV	30 µV	10 µV	10 µV	30 µV	30 µV	60 µV	60 µV
Current - Supply	240 µA	750 µA	750 µA	55 µA	55 µA	55 µA	55 µA	55 µA	55 µA	20 µA	20 µA
Current - Output / Channel	31 mA	50 mA	50 mA	25 mA	25 mA	25 mA	25 mA	25 mA	25 mA	5 mA	5 mA
Voltage - Supply Span (Min)	2.4 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V	2.3 V	2.3 V
Voltage - Supply Span (Max)	5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V
Operating Temperature (Min)	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C
Operating Temperature (Max)	125°C	125°C	125°C	85°C	85°C	125°C	125°C	85°C	85°C	85°C	85°C
Package / Case	16-SSOP	16-SSOP	16-SSOP	16-SSOP	16-SSOP	16-SSOP	16-SSOP	16-SSOP	16-SSOP	16-SSOP	16-SSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

For Direct Replacement with Enhanced Performance:

The AD8604ARQZ and AD8604ARQZ-RL are active products from Analog Devices Inc. with ROHS3 compliance and MSL 1 rating. These parts provide superior slew rate (6 V/µs versus 0.17 V/µs) and gain bandwidth product (8.4 MHz versus 400 kHz), making them suitable for applications requiring faster transient response. Both variants are available in tube and tape & reel packaging. The extended supply voltage maximum (5.5 V) provides additional design flexibility. These parts are recommended when performance headroom is required and power consumption is not a primary constraint.

For Power-Optimized Replacement:

The LTC6079 series from Analog Devices Inc. offers significant power reduction (55 µA total supply current versus 240 µA) while maintaining active product status and ROHS3 compliance. The LTC6079HGN#PBF and LTC6079HGN#TRPBF variants support the full -40°C to 125°C temperature range matching the original part. These parts are recommended for battery-powered applications and designs where thermal management is a concern. The LTC6079CGN and LTC6079IGN variants operate to 85°C maximum and are suitable for applications with reduced temperature requirements.

For Ultra-Low Power Applications:

The OPA4336EA/250 and OPA4336EA/2K5 from Texas Instruments provide the lowest power consumption (20 µA total supply current) with ROHS3 compliance. These parts are suitable for extremely power-constrained applications such as portable medical devices and wireless sensor nodes. The reduced output current capability (5 mA per channel versus 31 mA) and lower gain bandwidth product (100 kHz) require verification against specific load requirements. Operating temperature is limited to -40°C to 85°C.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and EAR99 export classification. Moisture sensitivity levels vary: AD8604 and LTC6079 series feature MSL 1 (unlimited shelf life), while OPA4336 series maintains MSL 2 (1 year) matching the original part. Selection should account for supply chain logistics and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the AD8604ARQZ directly replace the ISL28486FAZ without circuit modifications?

A: The AD8604ARQZ maintains electrical compatibility in terms of pin count (16-pin), package type (SSOP), rail-to-rail output, and 4-circuit configuration. However, the significantly higher slew rate (6 V/µs versus 0.17 V/µs) and gain bandwidth product (8.4 MHz versus 400 kHz) may affect circuit stability if the original design relied on the slower response characteristics. Circuit simulation and testing are necessary to confirm compatibility in specific applications.

Q: What is the difference between AD8604ARQZ and AD8604ARQZ-RL?

A: Both parts are electrically identical. The primary difference is packaging: AD8604ARQZ is supplied in tube packaging, while AD8604ARQZ-RL is supplied in tape & reel format. Selection depends on assembly process requirements and volume considerations.

Q: Are the LTC6079 variants interchangeable with each other?

A: The LTC6079 series variants differ in temperature rating and packaging. LTC6079CGN and LTC6079IGN operate to 85°C maximum, while LTC6079HGN operates to 125°C. LTC6079HGN#PBF and LTC6079HGN#TRPBF are electrically identical, differing only in packaging (tube versus tape & reel). Selection must match the application's temperature requirements.

Q: Why does the OPA4336 series have lower output current capability?

A: The OPA4336 series prioritizes ultra-low power consumption (20 µA total supply current) through circuit design optimization. The reduced output current capability (5 mA per channel) is a direct result of this power optimization. Applications requiring higher output current must use alternative substitutes such as the AD8604 or LTC6079 series.

Q: What is the significance of the MSL rating difference between substitute parts?

A: Moisture Sensitivity Level (MSL) indicates the maximum shelf life under specified humidity conditions. MSL 1 (unlimited) parts such as AD8604 and LTC6079 series can be stored indefinitely under controlled conditions. MSL 2 (1 year) parts such as OPA4336 and the original ISL28486FAZ require use within one year of manufacture. This affects supply chain planning and inventory management.

Q: Can I use the LTC6079CGN#PBF in an application requiring -40°C to 125°C operation?

A: No. The LTC6079CGN#PBF is rated for -40°C to 85°C operation only. For full -40°C to 125°C temperature range, the LTC6079HGN#PBF or LTC6079HGN#TRPBF must be used. Operating outside the specified temperature range voids device reliability guarantees.

Q: What are the packaging differences between 16-QSOP and 16-SSOP?

A: Both are 16-pin surface mount packages with 0.154" (3.90mm) width. QSOP (Quarter-Size Small Outline Package) and SSOP (Shrink Small Outline Package) are functionally equivalent for PCB layout purposes. The ISL28486FAZ uses QSOP designation, while most substitutes use SSOP designation. These are interchangeable from a footprint perspective.

Q: Which substitute part should I select for a new design?

A: Selection depends on application requirements: (1) For performance-critical applications requiring fast signal processing, select AD8604ARQZ or AD8604ARQZ-RL. (2) For power-constrained applications with moderate performance requirements, select LTC6079HGN#PBF or LTC6079HGN#TRPBF. (3) For ultra-low power portable applications with slow signal processing, select OPA4336EA/250 or OPA4336EA/2K5. All parts are active products with ROHS3 compliance.

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