AD8061AR Equivalent & Substitute Parts

Part Overview

The AD8061AR is a voltage feedback amplifier manufactured by Analog Devices Inc., designed as a single-circuit rail-to-rail operational amplifier in an 8-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The AD8061AR operates across a supply voltage range of 2.7 V to 8 V with an operating temperature range of -40°C to 85°C, making it suitable for general-purpose amplification applications requiring moderate bandwidth and slew rate performance.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	650	V/µs
-3dB Bandwidth	320	MHz
Current - Input Bias	3.5	µA
Voltage - Input Offset	1	mV
Current - Supply	6.8	mA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	8	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the AD8061AR are categorized based on electrical and mechanical compatibility within the linear amplifier category. The primary substitution criteria are:

Direct Electrical Equivalents: Parts that maintain identical or superior performance across all key parameters including slew rate, bandwidth, input bias current, input offset voltage, supply current, output current capability, and supply voltage range. These parts operate within the same temperature range or extended ranges and are packaged in the same 8-SOIC form factor.

Functional Equivalents: Parts that provide rail-to-rail output capability, single-circuit configuration, and surface mount 8-SOIC packaging but may exhibit different performance characteristics in bandwidth, slew rate, or input characteristics. These parts are suitable for applications where the AD8061AR's specific performance metrics are not critical constraints.

The AD8061ARZ represents a direct equivalent with identical electrical specifications but differs in product status (active versus obsolete) and packaging format (tube versus unspecified). The LTC6240 series and MCP6041 series represent functional alternatives with different amplifier classifications (general purpose versus voltage feedback) and varying performance trade-offs in bandwidth and slew rate.

Parameter Comparison

Parameter	AD8061AR	AD8061ARZ	LTC6240CS8#PBF	LTC6240HS8#PBF	LTC6240IS8#PBF	MCP6041-E/SN	MCP6041-I/SN	MCP6041T-E/SN
Amplifier Type	Voltage Feedback	Voltage Feedback	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1	1
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
Slew Rate (V/µs)	650	650	10	10	10	0.003	0.003	0.003
Bandwidth / Gain Bandwidth Product	320 MHz	320 MHz	18 MHz	18 MHz	18 MHz	14 kHz	14 kHz	14 kHz
Current - Input Bias (µA)	3.5	3.5	0.0000002	0.0000002	0.0000002	0.000001	0.000001	0.000001
Voltage - Input Offset (mV)	1	1	0.05	0.05	0.05	3	3	3
Current - Supply (mA)	6.8	6.8	2	2	2	0.0006	0.0006	0.0006
Current - Output / Channel (mA)	50	50	30	30	30	Not specified	20	Not specified
Voltage - Supply Span Min (V)	2.7	2.7	2.8	2.8	2.8	1.4	1.4	1.4
Voltage - Supply Span Max (V)	8	8	6	6	6	6	6	6
Operating Temperature (°C)	-40 to 85	-40 to 85	0 to 70	-40 to 125	-40 to 85	-40 to 125	-40 to 85	-40 to 125
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AD8061ARZ (Analog Devices Inc.): This part is the direct electrical equivalent of the AD8061AR with identical performance specifications across all measured parameters. The AD8061ARZ is currently in active product status, ensuring ongoing availability and support. This part is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The AD8061ARZ is available in tube packaging and represents the primary recommended substitute for direct replacement in existing designs.

LTC6240 Series (Analog Devices Inc.): The LTC6240 family includes four variants (LTC6240CS8#PBF, LTC6240CS8#TRPBF, LTC6240HS8#PBF, LTC6240HS8#TRPBF, LTC6240IS8#PBF, LTC6240IS8#TRPBF) classified as general-purpose amplifiers. These parts are active products with ROHS3 compliance. The LTC6240 series exhibits significantly lower slew rate (10 V/µs versus 650 V/µs) and reduced bandwidth (18 MHz versus 320 MHz) compared to the AD8061AR. Selection among LTC6240 variants depends on operating temperature requirements: the CS variant operates 0°C to 70°C, the HS variant operates -40°C to 125°C, and the IS variant operates -40°C to 85°C. These parts are suitable for applications where the AD8061AR's high-speed performance is not required.

MCP6041 Series (Microchip Technology): The MCP6041 family includes three variants (MCP6041-E/SN, MCP6041-I/SN, MCP6041T-E/SN) classified as general-purpose amplifiers. These parts are active products with ROHS3 compliance. The MCP6041 series exhibits extremely low slew rate (0.003 V/µs) and minimal bandwidth (14 kHz) with ultra-low supply current (600 nA). The MCP6041-E/SN operates -40°C to 125°C, the MCP6041-I/SN operates -40°C to 85°C, and the MCP6041T-E/SN operates -40°C to 125°C. These parts are suitable for low-power, low-frequency applications where the AD8061AR's performance specifications exceed application requirements.

Frequently Asked Questions (FAQ)

Q: Can the AD8061ARZ be used as a direct replacement for the AD8061AR?

A: Yes. The AD8061ARZ is electrically identical to the AD8061AR across all specified parameters including slew rate, bandwidth, input bias current, input offset voltage, supply current, output current, and supply voltage range. Both parts operate within the same temperature range (-40°C to 85°C) and use identical 8-SOIC packaging. The primary difference is product status: AD8061ARZ is active while AD8061AR is obsolete.

Q: What are the key performance differences between the AD8061AR and the LTC6240 series?

A: The AD8061AR provides significantly higher slew rate (650 V/µs versus 10 V/µs) and bandwidth (320 MHz versus 18 MHz). The LTC6240 series offers lower input bias current (0.2 pA versus 3.5 µA) and lower input offset voltage (50 µV versus 1 mV). The LTC6240 series also operates at lower supply current (2 mA versus 6.8 mA). Selection depends on whether high-speed performance or low-power operation is prioritized.

Q: Are the MCP6041 parts suitable replacements for high-frequency applications?

A: No. The MCP6041 series is not suitable for high-frequency applications. These parts exhibit extremely low bandwidth (14 kHz) and slew rate (0.003 V/µs) compared to the AD8061AR (320 MHz bandwidth, 650 V/µs slew rate). The MCP6041 series is designed for low-frequency, low-power applications and would not meet performance requirements for circuits designed around the AD8061AR's high-speed characteristics.

Q: What packaging options are available for substitute parts?

A: All substitute parts maintain the 8-SOIC surface mount package form factor compatible with AD8061AR PCB layouts. Packaging format variations include tube packaging and tape & reel (TR) formats. The AD8061ARZ is available in tube format. The LTC6240 series is available in both tube and tape & reel formats. The MCP6041 series is available in tube and cut tape formats. Selection of packaging format depends on production volume and assembly requirements.

Q: Are all substitute parts RoHS3 compliant?

A: The AD8061ARZ, LTC6240 series, and MCP6041 series are all ROHS3 compliant. The original AD8061AR does not specify RoHS status. All active substitute parts are REACH unaffected. These certifications ensure compliance with current environmental and regulatory requirements for new designs and production.

Q: What is the temperature range consideration when selecting a substitute?

A: The AD8061AR operates -40°C to 85°C. The AD8061ARZ maintains this identical range. The LTC6240 series offers three temperature variants: CS (-40°C to 85°C), HS (-40°C to 125°C), and IS (-40°C to 85°C). The MCP6041 series offers two temperature variants: -E (-40°C to 125°C) and -I (-40°C to 85°C). Selection should match the application's required operating temperature range.

Q: Can the LTC6240 and MCP6041 parts be used interchangeably?

A: No. While both are general-purpose amplifiers in 8-SOIC packages, they have significantly different performance characteristics. The LTC6240 provides 18 MHz bandwidth and 10 V/µs slew rate, while the MCP6041 provides only 14 kHz bandwidth and 0.003 V/µs slew rate. Selection between these families depends on specific application bandwidth and slew rate requirements.

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