XR1008ISO8 Equivalent & Substitute Parts Reference

Part Overview

The XR1008ISO8 is a general purpose operational amplifier manufactured by MaxLinear, Inc., featuring a single circuit in an 8-SOIC surface mount package with rail-to-rail output capability. This device is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support and production continuity. The XR1008ISO8 operates across a supply voltage range of 2.5V to 5.5V with a slew rate of 50V/µs and gain bandwidth product of 33 MHz, serving applications requiring general purpose amplification in compact form factors.

Key Parameters

Parameter	XR1008ISO8 Specification
Manufacturer	MaxLinear, Inc.
Product Status	Obsolete
Package / Case	8-SOIC (0.154", 3.90mm Width)
Amplifier Type	General Purpose
Number of Circuits	1
Output Type	Rail-to-Rail
Slew Rate	50 V/µs
Gain Bandwidth Product	33 MHz
-3dB Bandwidth	35 MHz
Voltage - Supply Span (Min)	2.5 V
Voltage - Supply Span (Max)	5.5 V
Operating Temperature	-40°C to 125°C
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute components for the XR1008ISO8 are selected based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

Primary Compatibility Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width) — identical physical footprint required
Amplifier Type: General Purpose — functional classification match
Number of Circuits: 1 — single amplifier configuration
Output Type: Rail-to-Rail — output swing capability
Mounting Type: Surface Mount — assembly process compatibility
Operating Temperature Range: -40°C to 125°C — thermal operating envelope
Moisture Sensitivity Level: 1 (Unlimited) — moisture handling classification

Secondary Electrical Parameters for Evaluation:

Supply Voltage Range compatibility with 2.5V to 5.5V operation
Slew Rate, Gain Bandwidth Product, and -3dB Bandwidth performance characteristics
Input bias current and input offset voltage specifications
Supply current and output current capabilities

All three substitute parts meet the primary compatibility criteria and are classified as active products with current manufacturing status and RoHS3 compliance.

Parameter Comparison

Parameter	XR1008ISO8	ADA4084-1ARZ	MAX4256ESA+	MAX4488ASA+
Manufacturer	MaxLinear, Inc.	Analog Devices Inc.	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active	Active	Active
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail
Slew Rate	50 V/µs	4.6 V/µs	2.1 V/µs	10 V/µs
Gain Bandwidth Product	33 MHz	15.9 MHz	22 MHz	42 MHz
-3dB Bandwidth	35 MHz	13.9 MHz	—	—
Current - Input Bias	1.2 µA	140 nA	1 pA	1 pA
Voltage - Input Offset	5 mV	40 µV	70 µV	70 µV
Current - Supply	505 µA	625 µA	420 µA	2.5 mA
Current - Output / Channel	15 mA	30 mA	—	48 mA
Voltage - Supply Span (Min)	2.5 V	3 V	2.4 V	2.7 V
Voltage - Supply Span (Max)	5.5 V	30 V	5.5 V	5.5 V
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 85°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ADA4084-1ARZ — Recommended for applications requiring extended supply voltage range (up to 30V) and lower input bias current (140 nA). This substitute maintains full temperature range compatibility (-40°C to 125°C) and is RoHS3 compliant. The ADA4084-1ARZ exhibits lower slew rate (4.6 V/µs) and reduced gain bandwidth product (15.9 MHz) compared to the XR1008ISO8, making it suitable for lower-frequency applications where power supply flexibility is advantageous.

MAX4256ESA+ — Recommended for cost-optimized designs with reduced supply current requirements (420 µA). This substitute provides the lowest power consumption among active alternatives and maintains supply voltage compatibility (2.4V to 5.5V). The MAX4256ESA+ operates within a reduced temperature range (-40°C to 85°C) and exhibits the lowest slew rate (2.1 V/µs), suitable for applications not requiring full 125°C operation.

MAX4488ASA+ — Recommended for high-performance applications requiring maximum slew rate (10 V/µs) and highest gain bandwidth product (42 MHz) among available substitutes. This device maintains full temperature range compatibility (-40°C to 125°C) and delivers the highest output current capability (48 mA). The MAX4488ASA+ operates at elevated supply current (2.5 mA) and is suitable for applications prioritizing dynamic performance over power efficiency.

All three substitutes are active products with current manufacturing status, RoHS3 compliance, and MSL 1 moisture sensitivity classification, ensuring long-term availability and environmental regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the XR1008ISO8 be directly replaced with any of these substitute parts?

A: Direct replacement is possible only when the application circuit accommodates the electrical parameter differences listed in the Parameter Comparison table. All three substitutes share identical package geometry (8-SOIC), mounting type (surface mount), and functional classification (general purpose, single circuit, rail-to-rail output). Pin-to-pin compatibility is maintained across all four devices.

Q: What are the key electrical differences between the XR1008ISO8 and its substitutes?

A: The primary differences are slew rate, gain bandwidth product, input bias current, and supply current. The XR1008ISO8 offers the highest slew rate (50 V/µs) and gain bandwidth product (33 MHz). The MAX4488ASA+ provides the closest performance match with 10 V/µs slew rate and 42 MHz gain bandwidth product. The ADA4084-1ARZ and MAX4256ESA+ offer reduced performance in these parameters but provide other advantages such as extended supply range or lower power consumption.

Q: Which substitute is best for low-power applications?

A: The MAX4256ESA+ offers the lowest supply current (420 µA) and is optimized for power-constrained designs. This device is suitable for battery-powered or energy-harvesting applications where minimizing quiescent current is critical.

Q: Which substitute provides the highest performance?

A: The MAX4488ASA+ delivers the highest slew rate (10 V/µs) and gain bandwidth product (42 MHz), along with the highest output current capability (48 mA). This device is suitable for applications requiring fast signal processing and high-current output drive.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All three substitute parts (ADA4084-1ARZ, MAX4256ESA+, and MAX4488ASA+) are RoHS3 compliant, ensuring environmental regulatory compliance and long-term supply chain sustainability.

Q: What is the temperature range limitation for the MAX4256ESA+?

A: The MAX4256ESA+ operates from -40°C to 85°C, which is narrower than the XR1008ISO8 (-40°C to 125°C). Applications requiring operation above 85°C must use either the ADA4084-1ARZ or MAX4488ASA+.

Q: Can the ADA4084-1ARZ operate at higher supply voltages than the XR1008ISO8?

A: Yes. The ADA4084-1ARZ supports supply voltages up to 30V, compared to the XR1008ISO8 maximum of 5.5V. This extended range makes the ADA4084-1ARZ suitable for applications requiring higher supply voltages, though the minimum supply voltage is 3V (versus 2.5V for the XR1008ISO8).

Q: Are there any package or footprint differences between these devices?

A: No. All four devices use identical 8-SOIC packaging (0.154", 3.90mm width) with surface mount mounting type. PCB layout and assembly processes require no modification for substitution.

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