AD8032AR Equivalent & Substitute Parts

Part Overview

The AD8032AR is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc., configured as a dual-channel (2 circuit) operational amplifier in an 8-SOIC surface mount package. This device features rail-to-rail output capability and is designed for general-purpose signal conditioning and amplification applications. The AD8032AR is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified performance characteristics suitable for specific application requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	35	V/µs
-3dB Bandwidth	80	MHz
Current - Input Bias	450	nA
Voltage - Input Offset	1	mV
Current - Supply (per Channel)	900	µA
Current - Output / Channel	15	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	12	V
Operating Temperature Range	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AD8032AR is determined by alignment of critical electrical and mechanical parameters. The primary substitution criteria are:

Direct Equivalents maintain identical specifications across all electrical parameters (slew rate, bandwidth, input bias current, input offset voltage, supply current, output current, supply voltage range, and operating temperature). These parts are functionally interchangeable with the AD8032AR and differ only in packaging format or product status.

Functional Substitutes share the same package type (8-SOIC), mounting method (surface mount), number of circuits (2), and output type (rail-to-rail), but exhibit different electrical performance characteristics. These parts are suitable for applications where the AD8032AR's specific performance metrics are not critical constraints, or where enhanced performance is acceptable.

Performance-Enhanced Substitutes provide superior electrical characteristics (higher bandwidth, faster slew rate, lower input offset voltage, or lower input bias current) while maintaining package compatibility and dual-channel configuration. These parts are applicable in designs requiring improved signal fidelity or higher-frequency operation.

The following parameters determine substitution eligibility:

Package type and physical dimensions
Number of amplifier circuits
Output configuration (rail-to-rail capability)
Supply voltage range compatibility
Operating temperature range
Mounting technology (surface mount)

Parameter Comparison

Parameter	AD8032AR	AD8032ARZ	ADA4807-2ARMZ-R7	LMH6619QMAK/NOPB	LMH6619QMAKE/NOPB	LMH6619QMAKX/NOPB	LMH6646MA/NOPB	LMH6646MAX/NOPB	MAX4126ESA+	MAX4126ESA+T	MAX4128ESA+
Manufacturer	Analog Devices	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	35	35	250	57	57	57	22	22	2	2	10
-3dB Bandwidth (MHz)	80	80	180	140	140	140	55	55	5	5	25
Current - Input Bias (nA)	450	450	1200	1500	1500	1500	650	650	50	50	50
Voltage - Input Offset (mV)	1	1	0.14	0.1	0.1	0.1	1	1	0.25	0.25	0.25
Current - Supply per Channel (µA)	900	900	1000	1300	1300	1300	725	725	725	725	725
Current - Output / Channel (mA)	15	15	80	35	35	35	20	20	50	50	50
Voltage - Supply Span Min (V)	2.7	2.7	2.7	2.7	2.7	2.7	2.5	2.5	2.7	2.7	2.7
Voltage - Supply Span Max (V)	12	12	11	11	11	11	12	12	6.5	6.5	6.5
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package / Case	8-SOIC	8-SOIC	8-MSOP	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalent Substitution

The AD8032ARZ is the primary direct equivalent for the AD8032AR. This part maintains identical electrical specifications across all measured parameters: 35 V/µs slew rate, 80 MHz bandwidth, 450 nA input bias current, 1 mV input offset voltage, 900 µA supply current per channel, and 15 mA output current per channel. The AD8032ARZ differs only in packaging format (tube versus unspecified for the original) and product status (active versus obsolete). The AD8032ARZ is ROHS3 compliant and REACH unaffected, making it suitable for designs requiring regulatory compliance. This part is the recommended first choice for direct replacement in existing designs.

Performance-Enhanced Substitutes with Package Compatibility

The LMH6619QMAK/NOPB, LMH6619QMAKE/NOPB, and LMH6619QMAKX/NOPB (Texas Instruments) are functionally compatible substitutes in the identical 8-SOIC package. These parts provide enhanced performance with 57 V/µs slew rate (63% improvement), 140 MHz bandwidth (75% improvement), and lower input offset voltage (100 µV versus 1 mV). These devices are qualified to AEC-Q100 automotive standards and operate across an extended temperature range (-40°C to 125°C). The LMH6619 series is suitable for applications requiring improved signal fidelity and higher-frequency operation while maintaining the same physical footprint and pin configuration.

The LMH6646MA/NOPB and LMH6646MAX/NOPB (Texas Instruments) are also 8-SOIC compatible but provide lower performance specifications (22 V/µs slew rate, 55 MHz bandwidth). These parts are applicable only in applications where the AD8032AR's performance exceeds system requirements.

Alternative Package Substitutes

The ADA4807-2ARMZ-R7 (Analog Devices) provides superior electrical performance (250 V/µs slew rate, 180 MHz bandwidth, 140 µV input offset voltage) but requires package conversion from 8-SOIC to 8-MSOP (0.118" width versus 0.154" width). This part is suitable for new designs where PCB layout can accommodate the smaller package footprint. Extended operating temperature range (-40°C to 125°C) and higher output current capability (80 mA per channel) provide additional design flexibility.

Limited Compatibility Substitutes

The MAX4126ESA+, MAX4126ESA+T, and MAX4128ESA+ (Analog Devices/Maxim Integrated) maintain 8-SOIC package compatibility and dual-channel configuration but are classified as general-purpose amplifiers rather than voltage feedback amplifiers. These parts exhibit significantly reduced bandwidth (5 MHz and 25 MHz respectively) and slew rate (2 V/µs and 10 V/µs respectively). The MAX4126 and MAX4128 series are suitable only for low-frequency applications where the AD8032AR's performance specifications are not required. Supply voltage range is limited to 2.7 V to 6.5 V, restricting use in systems requiring higher supply voltages.

Compliance and Regulatory Status

All active substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement. The AD8032ARZ maintains identical compliance status to the original AD8032AR while offering active product status and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the AD8032ARZ be used as a direct replacement for the AD8032AR?

A: Yes. The AD8032ARZ is electrically and functionally identical to the AD8032AR across all specified parameters. The only differences are packaging format and product status. The AD8032ARZ is the recommended direct replacement.

Q: What is the primary difference between the AD8032AR and the LMH6619 series?

A: The LMH6619 series provides enhanced electrical performance with 63% higher slew rate (57 V/µs versus 35 V/µs) and 75% higher bandwidth (140 MHz versus 80 MHz). Both maintain the same 8-SOIC package and dual-channel configuration. The LMH6619 series also includes AEC-Q100 automotive qualification and extended operating temperature range (-40°C to 125°C).

Q: Can the ADA4807-2ARMZ-R7 be used as a direct replacement?

A: The ADA4807-2ARMZ-R7 is not a direct replacement due to package incompatibility (8-MSOP versus 8-SOIC). However, it is suitable for new designs where PCB layout can accommodate the smaller package. The ADA4807-2ARMZ-R7 provides superior electrical performance and is recommended for applications requiring higher bandwidth and faster slew rate.

Q: Are the MAX4126 and MAX4128 series suitable replacements for the AD8032AR?

A: The MAX4126 and MAX4128 series are not recommended as primary replacements. These parts are general-purpose amplifiers with significantly reduced bandwidth and slew rate. They are suitable only for low-frequency applications where the AD8032AR's performance specifications exceed system requirements. Additionally, the maximum supply voltage is limited to 6.5 V, which may not be compatible with systems requiring higher supply voltages.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC package is a surface mount dual in-line package with 0.154" (3.90 mm) width. This package type is critical for PCB layout compatibility. Substitutes must maintain this package specification unless PCB redesign is acceptable. The ADA4807-2ARMZ-R7 uses an 8-MSOP package (0.118" width), which is physically smaller and requires PCB layout modification.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates that the component meets the Restriction of Hazardous Substances Directive 3, which restricts the use of specific hazardous materials in electrical and electronic equipment. All active substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for procurement in regulated industries.

Q: Can the LMH6646 series be used instead of the AD8032AR?

A: The LMH6646 series maintains 8-SOIC package compatibility and dual-channel configuration but provides lower electrical performance (22 V/µs slew rate, 55 MHz bandwidth). These parts are suitable only in applications where the AD8032AR's performance specifications exceed system requirements. The LMH6646 series is not recommended as a primary replacement.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging is used for lower-volume applications and manual handling, while tape & reel packaging is used for automated assembly processes. Both packaging formats contain identical components. Selection depends on manufacturing process requirements and volume. The AD8032ARZ is available in tube format, while the LMH6619 series is available in both tube and tape & reel formats.

Q: Are there any temperature range limitations when substituting parts?

A: The AD8032AR and AD8032ARZ operate across -40°C to 85°C. The LMH6619 series and ADA4807-2ARMZ-R7 extend this range to -40°C to 125°C, providing additional design margin in high-temperature applications. The MAX4126 and MAX4128 series are limited to -40°C to 85°C, matching the original part.

Q: What is the significance of input bias current and input offset voltage specifications?

A: Input bias current (450 nA for AD8032AR) and input offset voltage (1 mV for AD8032AR) determine the precision and accuracy of signal conditioning circuits. Lower values indicate higher precision. The LMH6619 series provides lower input offset voltage (100 µV), suitable for applications requiring higher accuracy. The MAX4126 and MAX4128 series provide even lower input bias current (50 nA) and input offset voltage (250 µV), suitable for precision instrumentation applications.

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