ISL28407FBZ Equivalent & Substitute Parts

Part Overview

The ISL28407FBZ is a general-purpose operational amplifier integrated circuit manufactured by Renesas Electronics Corporation. This device contains four independent amplifier circuits in a 14-SOIC surface mount package and is designed for applications requiring low-power, general-purpose amplification across a wide supply voltage range of 4.5 V to 40 V.

The ISL28407FBZ is classified as an obsolete product. Identification of equivalent and substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity where the original component is no longer available through standard distribution channels.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISL28407FBZ
Manufacturer	Renesas Electronics Corporation
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	4
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Gain Bandwidth Product	1 MHz
Slew Rate	0.32 V/µs
Current - Input Bias	50 pA
Voltage - Input Offset	10 µV
Current - Supply	210 µA (x4 Channels)
Current - Output / Channel	40 mA
Voltage - Supply Span (Min)	4.5 V
Voltage - Supply Span (Max)	40 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 ISL28407FBZ is determined by the following critical parameters:

Mandatory Matching Criteria:

Number of Circuits: 4 independent amplifier channels
Package / Case: 14-SOIC form factor with 0.154" (3.90mm) width
Mounting Type: Surface Mount
Amplifier Type: General Purpose
Gain Bandwidth Product: 1 MHz (primary performance specification)
Current - Output / Channel: 40 mA minimum
Operating Temperature Range: -40°C ~ 125°C (full industrial range)

Flexible Parameters (allowable variation):

Voltage - Supply Span: Substitute parts must support the full 4.5 V to 40 V range or a subset thereof
Slew Rate: May vary from the original 0.32 V/µs specification
Current - Input Bias: May vary within acceptable limits
Voltage - Input Offset: May vary within acceptable limits
Current - Supply: May vary from the original 210 µA specification

Substitute parts are grouped based on their ability to meet the mandatory criteria while maintaining functional equivalence in general-purpose amplification applications.

Parameter Comparison

Parameter	ISL28407FBZ	ADA4004-4ARZ	ADA4004-4ARZ-R7	ADA4004-4ARZ-RL	LM324ADR2G	LM324AM/NOPB	LM324AMX/NOPB	LM324M/NOPB	LM324MX/NOPB
Manufacturer	Renesas	Analog Devices	Analog Devices	Analog Devices	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Circuits	4	4	4	4	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Gain Bandwidth Product	1 MHz	12 MHz	12 MHz	12 MHz	1 MHz	1 MHz	1 MHz	1 MHz	1 MHz
Slew Rate	0.32 V/µs	2.7 V/µs	2.7 V/µs	2.7 V/µs	—	—	—	—	—
Current - Input Bias	50 pA	40 nA	40 nA	40 nA	40 nA	45 nA	45 nA	45 nA	45 nA
Voltage - Input Offset	10 µV	40 µV	40 µV	40 µV	2 mV	2 mV	2 mV	2 mV	2 mV
Current - Output / Channel	40 mA	10 mA	10 mA	10 mA	40 mA	40 mA	40 mA	40 mA	40 mA
Voltage - Supply Span (Min)	4.5 V	10 V	10 V	10 V	3 V	3 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	40 V	30 V	30 V	30 V	32 V	32 V	32 V	32 V	32 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Product Status	Obsolete	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
Moisture Sensitivity Level (MSL)	2 (1 Year)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Recommended for Full Compatibility):

The LM324 series devices from Texas Instruments (LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, LM324MX/NOPB) are the preferred substitutes for the ISL28407FBZ. These parts maintain the following equivalencies:

Identical 4-circuit general-purpose amplifier configuration
Matching 14-SOIC package form factor
Identical 1 MHz gain bandwidth product specification
Identical 40 mA output current per channel
Full industrial operating temperature range (-40°C ~ 125°C)
Active product status with continuous manufacturing support
ROHS3 compliance and EAR99 classification

The LM324 series is available in multiple packaging formats (Tube, Cut Tape & Digi-Reel, Tape & Reel) to accommodate different procurement and assembly requirements. All variants maintain identical electrical specifications.

Secondary Substitutes (Conditional Compatibility):

The LM324ADR2G from onsemi is functionally equivalent with the following considerations:

Meets all mandatory package and circuit count requirements
Maintains 1 MHz gain bandwidth product
Provides 40 mA output current per channel
Operating temperature range limited to 0°C ~ 70°C (does not extend to -40°C)
Active product status with established supply chain

The LM324ADR2G is suitable for applications operating within the 0°C ~ 70°C temperature window.

Alternative Substitutes (Performance Enhancement):

The ADA4004-4ARZ series from Analog Devices (ADA4004-4ARZ, ADA4004-4ARZ-R7, ADA4004-4ARZ-RL) offers enhanced performance characteristics:

Four independent amplifier circuits in 14-SOIC package
Full industrial operating temperature range (-40°C ~ 125°C)
Elevated gain bandwidth product of 12 MHz (exceeds original specification)
Reduced slew rate of 2.7 V/µs (exceeds original specification)
Output current per channel limited to 10 mA (does not meet 40 mA requirement)
Supply voltage range of 10 V to 30 V (does not support full 4.5 V minimum)
Active product status with multiple packaging options

The ADA4004-4ARZ series is suitable for applications where enhanced bandwidth and slew rate performance are beneficial and where output current requirements do not exceed 10 mA and supply voltage remains within 10 V to 30 V range.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and EAR99 export classification, consistent with the original ISL28407FBZ specifications. Moisture sensitivity levels vary across substitutes; selection should account for storage and handling requirements specific to manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can the LM324 series directly replace the ISL28407FBZ without circuit modifications?

A: The LM324 series devices (LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, LM324MX/NOPB) are pin-compatible and functionally equivalent substitutes. Both the original part and the LM324 series share identical 14-SOIC packaging, four-circuit configuration, 1 MHz gain bandwidth product, and 40 mA output current per channel. No circuit modifications are required for applications operating within the 0°C ~ 70°C temperature range. Applications requiring the full -40°C ~ 125°C operating range must verify that the LM324 series meets extended temperature requirements.

Q: What is the key difference between the ADA4004-4ARZ and the LM324 series?

A: The ADA4004-4ARZ series provides enhanced performance with a 12 MHz gain bandwidth product and 2.7 V/µs slew rate, compared to the LM324 series at 1 MHz and unspecified slew rate. However, the ADA4004-4ARZ series has two significant limitations: output current is limited to 10 mA per channel (versus 40 mA for LM324), and the minimum supply voltage is 10 V (versus 3 V for LM324). Selection between these families depends on whether the application requires higher bandwidth and slew rate performance or higher output current and lower supply voltage operation.

Q: Are there packaging format differences among the LM324 substitute options?

A: Yes. The LM324 series is available in three packaging formats: Tube (LM324AM/NOPB, LM324M/NOPB), Cut Tape & Digi-Reel (LM324AMX/NOPB, LM324MX/NOPB), and alternative supplier packages. All variants maintain identical electrical specifications and 14-SOIC form factor. Selection of packaging format is determined by procurement method and assembly process requirements rather than electrical performance.

Q: Does the LM324ADR2G from onsemi provide full temperature range coverage?

A: The LM324ADR2G operates over 0°C ~ 70°C, which does not extend to the -40°C lower limit of the original ISL28407FBZ. This part is suitable for applications operating within the 0°C ~ 70°C window. Applications requiring full industrial temperature range (-40°C ~ 125°C) must select from the Texas Instruments LM324 series or the Analog Devices ADA4004-4ARZ series.

Q: What is the significance of the different moisture sensitivity levels (MSL) among substitute parts?

A: Moisture sensitivity level (MSL) indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before baking is required. The ISL28407FBZ has MSL 2 (1 Year), while most LM324 variants have MSL 1 (Unlimited), and ADA4004-4ARZ variants have MSL 3 (168 Hours). Lower MSL values provide greater flexibility in storage and handling. Selection should account for manufacturing facility conditions and component shelf life requirements.

Q: Can the ISL28407FBZ operate at supply voltages below 10 V if substituted with ADA4004-4ARZ?

A: No. The ADA4004-4ARZ series requires a minimum supply voltage of 10 V, whereas the ISL28407FBZ operates from 4.5 V minimum. Applications requiring operation below 10 V supply voltage must use the LM324 series (minimum 3 V) or the original ISL28407FBZ. The ADA4004-4ARZ is not suitable for low-voltage applications.

Q: Is the ISL28407FBZ still available for procurement?

A: The ISL28407FBZ is classified as an obsolete product. While limited inventory may exist through component distributors, new manufacturing has ceased. For new designs or long-term production requirements, selection of an active substitute part (LM324 series or ADA4004-4ARZ series) is recommended to ensure supply chain continuity.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The critical parameters for substitution are: (1) Number of Circuits (must be 4), (2) Package / Case (must be 14-SOIC), (3) Gain Bandwidth Product (1 MHz for direct equivalence), (4) Current - Output / Channel (40 mA minimum for full compatibility), (5) Operating Temperature Range (must support application requirements), and (6) Voltage - Supply Span (must encompass application supply voltage). Deviations from these parameters require application-specific evaluation.

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