AD8039AR Equivalent & Substitute Parts

Part Overview

The AD8039AR is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc., configured as a dual-channel (2 circuit) device in an 8-SOIC surface mount package. This part is classified as obsolete, though it remains in stock with 3,305 units available. The AD8039AR is designed for applications requiring moderate bandwidth and low input bias current characteristics in compact form factors.

Due to its obsolete product status, equivalent and substitute parts are necessary for new designs, long-term availability assurance, and procurement flexibility. Substitute parts are selected based on matching electrical performance parameters, package compatibility, and functional equivalence as voltage feedback amplifiers.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	2	—
Slew Rate	425	V/µs
-3dB Bandwidth	350	MHz
Current - Input Bias	400	nA
Voltage - Input Offset	500	µV
Current - Supply (per Channel)	1	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	12	V
Operating Temperature Range	-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 AD8039AR are grouped into two categories based on substitution compatibility:

Direct Substitutes (Identical Electrical and Mechanical Parameters): Parts that maintain all critical electrical specifications including slew rate, bandwidth, input bias current, input offset voltage, supply current, and supply voltage range, while sharing the same 8-SOIC package footprint. These parts are functionally interchangeable with the AD8039AR in existing circuit designs.

Similar Substitutes (Compatible Electrical Performance with Parameter Variations): Parts that operate as voltage feedback dual-channel amplifiers in the 8-SOIC package but exhibit different performance characteristics in one or more of the following parameters: slew rate, bandwidth, input bias current, input offset voltage, supply current, or output type configuration. These parts require circuit evaluation to confirm suitability for specific applications.

Key Parameters Determining Substitution Eligibility:

Amplifier Type: Voltage Feedback
Number of Circuits: 2
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage Supply Range: Minimum 3V, Maximum 12V
Operating Temperature Range: -40°C to 85°C

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	-3dB Bandwidth (MHz)	Input Bias Current (nA)	Input Offset Voltage (µV)	Supply Current per Channel (mA)	Supply Voltage Min (V)	Supply Voltage Max (V)	Operating Temp (°C)	Output Type	Packaging
AD8039AR	Analog Devices Inc.	Obsolete	425	350	400	500	1	3	12	-40 to 85	—	Bulk
AD8039ARZ	Analog Devices Inc.	Active	425	350	400	500	1	3	12	-40 to 85	—	Tube
LT1819CS8#TRPBF	Analog Devices Inc.	Active	2500	400	2000	200	9	2.5	12.6	0 to 70	—	Tape & Reel
LT1819IS8#TRPBF	Analog Devices Inc.	Active	2500	400	2000	200	9	2.5	12.6	-40 to 85	—	Tape & Reel
LMH6658MA/NOPB	National Semiconductor	Active	700	270	5000	1000	6.5	3	12	-40 to 85	Rail-to-Rail	Bulk
LMH6658MAX/NOPB	Texas Instruments	Active	700	270	5000	1000	6.5	3	12	-40 to 85	Rail-to-Rail	Tape & Reel
LMH6682MA/NOPB	Texas Instruments	Active	940	190	5000	1000	6.5	3	12	-40 to 85	—	Tube
LMH6682MAX/NOPB	Texas Instruments	Active	940	190	5000	1000	6.5	3	12	-40 to 85	—	Tape & Reel
OPA2614ID	Texas Instruments	Active	145	180	6000	200	12	5	12	-40 to 85	Differential	Tube
OPA2614IDR	Texas Instruments	Active	145	180	6000	200	12	5	12	-40 to 85	Differential	Tape & Reel
OPA2652U	Texas Instruments	Active	335	700	4000	1500	11	6	12	-40 to 85	—	Tube

Engineering Selection Recommendations

Direct Substitution (Recommended for Existing Designs):

AD8039ARZ is the primary direct substitute for AD8039AR. Both parts are manufactured by Analog Devices Inc. and maintain identical electrical specifications across all critical parameters: 425 V/µs slew rate, 350 MHz bandwidth, 400 nA input bias current, 500 µV input offset voltage, and 1 mA supply current per channel. The AD8039ARZ is classified as Active product status, ensuring long-term availability and supply chain continuity. The only difference is packaging format: AD8039ARZ is supplied in Tube packaging versus the Bulk packaging of AD8039AR. Both share the 8-SOIC footprint and are pin-compatible. The AD8039ARZ carries ROHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements.

Alternative Substitutes for New Designs:

For applications where design flexibility exists, the following active parts offer enhanced performance characteristics:

LMH6658MA/NOPB and LMH6658MAX/NOPB provide higher slew rate (700 V/µs) and rail-to-rail output capability while maintaining the same 3V to 12V supply range and -40°C to 85°C operating temperature. These parts are suitable when higher output swing or faster transient response is beneficial.

LMH6682MA/NOPB and LMH6682MAX/NOPB offer the highest slew rate (940 V/µs) among voltage feedback substitutes, with reduced bandwidth (190 MHz) compared to AD8039AR. These parts are appropriate for applications prioritizing slew rate performance over bandwidth.

OPA2652U provides the highest bandwidth (700 MHz) with moderate slew rate (335 V/µs), suitable for wideband signal processing applications. This part requires minimum 6V supply voltage, which may limit applicability in 3V to 5V systems.

OPA2614ID and OPA2614IDR feature differential output configuration and are suitable only for applications specifically designed for differential amplifier topologies. These parts require minimum 5V supply voltage.

All recommended substitutes are Active product status with ROHS3 compliance and REACH Unaffected status, ensuring regulatory compliance and supply availability.

Frequently Asked Questions (FAQ)

Q: Can AD8039ARZ be used as a direct replacement for AD8039AR in existing circuit boards?

A: Yes. AD8039ARZ is electrically and mechanically identical to AD8039AR. Both parts share the same 8-SOIC package footprint, pin configuration, and electrical specifications. The only difference is packaging format (Tube versus Bulk). No circuit modifications are required.

Q: What is the primary reason to transition from AD8039AR to an alternative part?

A: AD8039AR is classified as obsolete product status. AD8039ARZ, manufactured by the same company with identical specifications, is classified as Active and ensures long-term availability. For new designs, AD8039ARZ is the recommended choice to avoid future obsolescence issues.

Q: Are the LMH6658 and LMH6682 series parts compatible with AD8039AR circuits?

A: LMH6658 and LMH6682 parts are pin-compatible and share the same 8-SOIC package. However, they exhibit different electrical characteristics. LMH6658 and LMH6682 have higher slew rates (700 V/µs and 940 V/µs respectively) compared to AD8039AR (425 V/µs), and different bandwidth specifications. Circuit evaluation is required to confirm performance equivalence in specific applications. Supply current is also higher (6.5 mA per channel versus 1 mA), which affects power consumption.

Q: What is the significance of the 3V minimum supply voltage specification?

A: The 3V minimum supply voltage indicates that AD8039AR and its direct substitutes can operate in low-voltage applications, including battery-powered systems. However, OPA2614 and OPA2652U require higher minimum supply voltages (5V and 6V respectively), limiting their use in 3V systems.

Q: Does packaging format (Tube, Tape & Reel, or Bulk) affect electrical performance?

A: No. Packaging format affects only handling, storage, and automated assembly processes. Electrical performance and specifications remain identical regardless of packaging type. Selection between Tube, Tape & Reel, or Bulk packaging depends on manufacturing process requirements and inventory management practices.

Q: Are all substitute parts RoHS3 compliant?

A: AD8039ARZ, LMH6658MAX/NOPB, LMH6682MA/NOPB, LMH6682MAX/NOPB, OPA2614ID, OPA2614IDR, and OPA2652U are all ROHS3 compliant. LMH6658MA/NOPB does not specify RoHS status in available documentation. For applications requiring RoHS3 compliance certification, verify compliance status with the specific manufacturer or distributor.

Q: What is the difference between -3dB Bandwidth and Gain Bandwidth Product?

A: -3dB Bandwidth specifies the frequency at which amplifier gain drops 3 decibels from its DC value. Gain Bandwidth Product (GBW) is the product of closed-loop gain and bandwidth, used to calculate bandwidth at specific gain settings. AD8039AR specifies -3dB Bandwidth (350 MHz). Some substitute parts specify Gain Bandwidth Product instead. These are different measurements and direct comparison requires circuit-specific gain configuration analysis.

Q: Can OPA2614 differential output parts replace AD8039AR in standard non-differential applications?

A: OPA2614 parts feature differential output configuration, which is fundamentally different from the standard single-ended output of AD8039AR. These parts are suitable only for applications specifically designed for differential amplifier operation. Standard single-ended circuits cannot directly utilize differential output amplifiers without significant circuit redesign.

Q: What is Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering without baking. MSL 1 (Unlimited) means the part has no moisture sensitivity restrictions. MSL 2 (1 Year) requires baking if the part has been exposed to ambient conditions for more than one year. AD8039AR and AD8039ARZ have MSL 1. OPA2614 and OPA2652U have MSL 2, requiring moisture management in long-term storage scenarios.

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