ISL28288FBZ Equivalent & Substitute Parts

Part Overview

The ISL28288FBZ is a general purpose operational amplifier manufactured by Renesas Electronics Corporation, configured as a dual-channel (2 circuit) rail-to-rail output device in an 8-SOIC surface mount package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available through standard distribution channels. Identifying equivalent and substitute parts is necessary to maintain design continuity, support production requirements, and ensure long-term component availability for applications currently utilizing this amplifier.

Key Parameters

Parameter	ISL28288FBZ Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	0.15	V/µs
Gain Bandwidth Product	300	kHz
Current - Input Bias	10	pA
Voltage - Input Offset	50	µV
Current - Supply (x2 Channels)	60	µA
Current - Output / Channel	31	mA
Voltage - Supply Span (Min)	2.4	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ISL28288FBZ is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 2 (dual-channel configuration)
Output Type: Rail-to-Rail
Package / Case: 8-SOIC form factor (0.154", 3.90mm Width) or mechanically compatible 8-SOP variant
Mounting Type: Surface Mount
Voltage - Supply Span: Minimum 2.4 V, Maximum 5.5 V (or compatible range encompassing these values)
Operating Temperature: Minimum -40°C, Maximum 125°C (or compatible range encompassing these values)

Secondary Compatibility Parameters:

Slew Rate: 0.15 V/µs or greater
Gain Bandwidth Product: 300 kHz or greater
Current - Input Bias: 10 pA or lower
Voltage - Input Offset: 50 µV or lower
Current - Supply: 60 µA or lower per dual-channel configuration
Current - Output / Channel: 31 mA or greater

Substitute parts meeting all primary criteria and maintaining compatibility with secondary parameters are classified as direct functional equivalents. Parts meeting primary criteria with variations in secondary parameters are classified as functional substitutes with application-dependent suitability.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Number of Circuits	Output Type	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	Package	Status
ISL28288FBZ	Renesas	General Purpose	2	Rail-to-Rail	0.15	300	10	50	60	31	2.4	5.5	-40 to 125	8-SOIC	Obsolete
MAX4092ASA+	Analog Devices/Maxim	General Purpose	2	Rail-to-Rail	0.2	500	20	30	130	—	2.7	6	-40 to 125	8-SOIC	Active
MAX4092ASA+T	Analog Devices/Maxim	General Purpose	2	Rail-to-Rail	0.2	500	20	30	130	—	2.7	6	-40 to 125	8-SOIC	Active
MAX4292ESA+T	Analog Devices/Maxim	General Purpose	2	Rail-to-Rail	0.2	500	15	200	100	20	1.8	5.5	-40 to 85	8-SOIC	Active
MAX4471ESA+	Analog Devices/Maxim	General Purpose	2	Rail-to-Rail	0.002	9	200	500	0.75	36	1.8	5.5	-40 to 85	8-SOIC	Active
MAX4471ESA+T	Analog Devices/Maxim	General Purpose	2	Rail-to-Rail	0.002	9	200	500	0.75	36	1.8	5.5	-40 to 85	8-SOIC	Active
MCP6022-E/SN	Microchip Technology	General Purpose	2	Rail-to-Rail	7	10000	1	250	1	30	2.5	5.5	-40 to 125	8-SOIC	Active
LMR932F-GE2	Rohm Semiconductor	General Purpose	2	Rail-to-Rail	0.35	1400	5000	1000	140	90	1.8	5	-40 to 85	8-SOP	Active
BU7266F-E2	Rohm Semiconductor	CMOS	2	Rail-to-Rail	0.0024	4	1	1000	0.7	4	1.8	5.5	-40 to 85	8-SOP	Active
BU7266SF-E2	Rohm Semiconductor	CMOS	2	Rail-to-Rail	0.0024	4	1	1000	0.7	4	1.8	5.5	-40 to 105	8-SOP	Active
BU7486F-E2	Rohm Semiconductor	CMOS	2	Rail-to-Rail	10	10000	1	1000	6	12	3	5.5	-40 to 105	8-SOP	Active

Engineering Selection Recommendations

Direct Functional Equivalents (Primary Substitutes):

The MAX4092ASA+ and MAX4092ASA+T represent the closest functional equivalents to the ISL28288FBZ. Both devices maintain general purpose amplifier classification, dual-channel configuration, rail-to-rail output, and identical 8-SOIC packaging. These parts support the full operating temperature range of -40°C to 125°C, matching the original specification. Both are manufactured by Analog Devices Inc./Maxim Integrated and carry active product status with ROHS3 compliance and unlimited moisture sensitivity rating. The primary distinction between these two variants is packaging format: MAX4092ASA+ is supplied in tube packaging, while MAX4092ASA+T is supplied in tape and reel format.

Secondary Functional Substitutes (Application-Dependent):

The MCP6022-E/SN manufactured by Microchip Technology provides general purpose dual-channel rail-to-rail amplification in 8-SOIC packaging with active product status and full temperature range support (-40°C to 125°C). This device exhibits significantly higher slew rate (7 V/µs) and gain bandwidth product (10 MHz) compared to the ISL28288FBZ, making it suitable for applications requiring enhanced dynamic performance. The MCP6022-E/SN is appropriate for designs where increased bandwidth and slew rate do not introduce stability or noise concerns.

The MAX4292ESA+T provides general purpose dual-channel rail-to-rail amplification in 8-SOIC packaging with active product status and ROHS3 compliance. This device operates across a reduced temperature range (-40°C to 85°C) and exhibits lower output current capability (20 mA per channel) compared to the ISL28288FBZ (31 mA per channel). Selection of this part requires verification that application requirements do not exceed the specified temperature range or output current limits.

Limited Compatibility Substitutes:

The MAX4471ESA+ and MAX4471ESA+T are general purpose dual-channel rail-to-rail amplifiers in 8-SOIC packaging with active product status. These devices operate within a reduced temperature range (-40°C to 85°C) and exhibit significantly lower slew rate (0.002 V/µs) and gain bandwidth product (9 kHz) compared to the ISL28288FBZ. These parts are suitable only for low-frequency applications where bandwidth and slew rate limitations do not impact circuit performance.

The LMR932F-GE2 manufactured by Rohm Semiconductor provides general purpose dual-channel rail-to-Rail amplification with active product status. This device is supplied in 8-SOP packaging (mechanically compatible with 8-SOIC footprints) and operates within a reduced temperature range (-40°C to 85°C). The LMR932F-GE2 exhibits higher input bias current (5 nA) and input offset voltage (1 mV) compared to the ISL28288FBZ, requiring circuit-level evaluation for precision applications.

Not Recommended for Direct Substitution:

The BU7266F-E2, BU7266SF-E2, and BU7486F-E2 manufactured by Rohm Semiconductor are classified as CMOS amplifiers rather than general purpose amplifiers. While these devices provide dual-channel rail-to-rail output in mechanically compatible 8-SOP packaging with active product status, the CMOS amplifier classification indicates fundamentally different input and output characteristics. The BU7266 variants exhibit extremely low slew rate (0.0024 V/µs) and gain bandwidth product (4 kHz), unsuitable for general purpose applications. The BU7486F-E2 provides higher performance (10 V/µs slew rate, 10 MHz bandwidth) but requires minimum supply voltage of 3 V, exceeding the ISL28288FBZ minimum specification of 2.4 V. These devices are not recommended for direct substitution without comprehensive circuit redesign and performance validation.

Frequently Asked Questions (FAQ)

Q: What is the primary reason the ISL28288FBZ requires substitution?

A: The ISL28288FBZ is classified as obsolete, indicating that the original manufacturer (Renesas Electronics Corporation) no longer produces this component through standard distribution channels. Substitution is necessary to maintain design continuity and ensure long-term component availability for production and field support.

Q: Which substitute part most closely matches the ISL28288FBZ specifications?

A: The MAX4092ASA+ and MAX4092ASA+T provide the closest functional match. Both devices maintain identical amplifier type (general purpose), circuit count (2), output configuration (rail-to-rail), package format (8-SOIC), and operating temperature range (-40°C to 125°C). The primary difference between these variants is packaging format: tube versus tape and reel.

Q: Can the BU7266 or BU7486 series parts be used as substitutes?

A: The BU7266 and BU7486 series are CMOS amplifiers, not general purpose amplifiers. While they provide dual-channel rail-to-rail output in mechanically compatible packaging, the fundamental amplifier type classification differs from the ISL28288FBZ. These devices exhibit significantly different input bias current, input offset voltage, and frequency response characteristics. Direct substitution is not recommended without comprehensive circuit redesign and performance validation.

Q: What is the difference between MAX4092ASA+ and MAX4092ASA+T?

A: Both parts are electrically identical general purpose dual-channel rail-to-rail amplifiers in 8-SOIC packaging with active product status and full temperature range support (-40°C to 125°C). The distinction is packaging format: MAX4092ASA+ is supplied in tube packaging, while MAX4092ASA+T is supplied in tape and reel format. Selection depends on production assembly requirements and inventory management preferences.

Q: Are the 8-SOP packaged parts (Rohm Semiconductor) mechanically compatible with 8-SOIC footprints?

A: The 8-SOP package (0.173", 4.40mm width) differs from the 8-SOIC package (0.154", 3.90mm width) in body width. While both are surface mount packages with similar pin pitch and lead configuration, the width difference may require PCB footprint modification. Verification of mechanical compatibility with existing PCB designs is required before implementation.

Q: What is the significance of the operating temperature range difference between substitute parts?

A: The ISL28288FBZ operates across -40°C to 125°C. Substitute parts with reduced temperature ranges (such as MAX4292ESA+T and MAX4471ESA+ at -40°C to 85°C) are suitable only for applications where the operating environment remains within the specified range. Applications requiring full -40°C to 125°C operation must select substitutes supporting this complete range, such as MAX4092ASA+, MAX4092ASA+T, or MCP6022-E/SN.

Q: How do slew rate and gain bandwidth product differences affect substitution suitability?

A: Slew rate determines the maximum rate of output voltage change, while gain bandwidth product indicates frequency response capability. The ISL28288FBZ specifies 0.15 V/µs slew rate and 300 kHz bandwidth. Substitutes with lower values (such as MAX4471ESA+ at 0.002 V/µs and 9 kHz) are suitable only for low-frequency applications. Substitutes with higher values (such as MCP6022-E/SN at 7 V/µs and 10 MHz) provide enhanced performance but may introduce stability or noise considerations in some circuit topologies.

Q: What compliance certifications should be verified for substitute parts?

A: All listed substitute parts carry ROHS3 compliance and EAR99 ECCN classification, matching the ISL28288FBZ compliance profile. Moisture sensitivity level (MSL) varies among substitutes: the ISL28288FBZ specifies MSL 3 (168 hours), while most active substitutes specify MSL 1 (unlimited). Lower MSL ratings provide more favorable handling and storage characteristics. REACH status is unaffected for all listed parts.

Q: Can multiple substitute parts be used interchangeably within a single design?

A: No. While multiple substitute parts may meet certain primary criteria, each exhibits distinct secondary parameter variations. Interchangeability within a single design requires that all substitute parts maintain identical electrical characteristics across all relevant parameters. Circuit designs should specify a single primary substitute with clearly documented alternative parts only if secondary parameter variations have been evaluated and confirmed acceptable for the specific application.

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