AD8513AR Equivalent & Substitute Parts

Part Overview

The AD8513AR is a J-FET operational amplifier with four independent circuits in a 14-SOIC surface mount package, manufactured by Analog Devices Inc. This device is classified as obsolete, though 4860 pieces remain in stock as new original inventory. The AD8513AR is designed for applications requiring low input bias current, low input offset voltage, and moderate bandwidth performance across a wide supply voltage range.

Due to the obsolete product status of the AD8513AR, identifying equivalent and substitute parts is necessary for ongoing design support, production continuity, and long-term component availability. Substitute parts are selected based on matching electrical characteristics, package compatibility, and functional equivalence within the J-FET and general-purpose operational amplifier categories.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	4	—
Slew Rate	20	V/µs
Gain Bandwidth Product	8	MHz
Current - Input Bias	25	pA
Voltage - Input Offset	100	µV
Current - Supply (x4 Channels)	2.2	mA
Current - Output / Channel	70	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 125	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the AD8513AR are grouped into two categories based on electrical and mechanical compatibility:

Category 1: Direct Analog Devices Equivalents These parts maintain identical electrical specifications and are manufactured by the same supplier. The AD8513ARZ differs only in packaging format (Tube vs. unspecified for the main part) and product status (Active vs. Obsolete). This part is a direct replacement with no functional differences.

Category 2: J-FET Operational Amplifiers with Compatible Parameters These parts share the J-FET amplifier topology, four-circuit configuration, and 14-SOIC package. Substitution is valid when the following parameters fall within acceptable ranges:

Slew Rate: 16–61 V/µs (main part: 20 V/µs)
Gain Bandwidth Product: 3–16.3 MHz (main part: 8 MHz)
Input Bias Current: 5–25 pA (main part: 25 pA)
Input Offset Voltage: 100–400 µV (main part: 100 µV)
Supply Current: 1.4–2.2 mA per four channels (main part: 2.2 mA)
Output Current per Channel: 25–79 mA (main part: 70 mA)
Supply Voltage Range: Minimum 9–10 V, Maximum 30–36 V (main part: 10–30 V)
Operating Temperature: -40°C to 85–125°C (main part: -40 to 125°C)

Category 3: General-Purpose Operational Amplifiers These parts provide functional equivalence through general-purpose amplifier topology with four circuits in 14-SOIC package. Substitution requires verification that the application does not depend on J-FET input characteristics (ultra-low input bias current). These parts feature wider supply voltage ranges and different input bias current specifications.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Product Status
AD8513AR	Analog Devices	J-FET	20	8	25	100	2.2	70	10	30	-40 to 125	Obsolete
AD8513ARZ	Analog Devices	J-FET	20	8	25	100	2.2	70	10	30	-40 to 125	Active
ADA4610-4ARZ	Analog Devices	J-FET	61	16.3	5	400	1.6	79	10	30	-40 to 125	Active
LF247DT	STMicroelectronics	J-FET	16	4	20	3000	1.4	40	44	44	-40 to 105	Active
LF347D	STMicroelectronics	J-FET	16	3	20	3000	1.4	40	44	44	0 to 70	Active
LF347DT	STMicroelectronics	J-FET	16	4	20	3000	1.4	40	44	44	0 to 70	Active
MC33074ADR2G	onsemi	General Purpose	13	4.5	100000	500	1.9	30	3	44	-40 to 85	Active
MC33074DR2G	onsemi	General Purpose	13	4.5	100000	1000	1.9	30	3	44	-40 to 85	Active
MC33179DR2G	onsemi	General Purpose	2	5	100000	150	1.7	100	4	36	-40 to 85	Active
MC34074ADR2G	onsemi	General Purpose	13	4.5	100000	500	1.9	30	3	44	0 to 70	Active
OPA4131NA	Texas Instruments	J-FET	10	4	5	200	1.5	25	9	36	-40 to 85	Active

Engineering Selection Recommendations

Primary Recommendation: AD8513ARZ

The AD8513ARZ is the direct equivalent of the AD8513AR. It maintains identical electrical specifications across all parameters and is manufactured by Analog Devices Inc. The only difference is product status (Active vs. Obsolete) and packaging format (Tube). This part is suitable for all applications currently using the AD8513AR without design modification. The AD8513ARZ is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.

Secondary Recommendation: ADA4610-4ARZ

The ADA4610-4ARZ is an active J-FET operational amplifier from Analog Devices Inc. with enhanced performance characteristics. It provides higher slew rate (61 V/µs vs. 20 V/µs), higher gain bandwidth product (16.3 MHz vs. 8 MHz), and lower input bias current (5 pA vs. 25 pA). The ADA4610-4ARZ includes rail-to-rail output capability and operates across the same supply voltage range (10–30 V) and temperature range (-40 to 125°C). This part is suitable for applications requiring improved dynamic performance while maintaining J-FET input characteristics. ROHS3 compliant and REACH unaffected.

Tertiary Recommendation: OPA4131NA

The OPA4131NA is a J-FET operational amplifier from Texas Instruments with four independent circuits in 14-SOIC package. It features lower input bias current (5 pA vs. 25 pA) and operates across a compatible supply voltage range (9–36 V). The OPA4131NA has lower slew rate (10 V/µs vs. 20 V/µs) and lower output current per channel (25 mA vs. 70 mA), making it suitable for applications where these reduced specifications are acceptable. Operating temperature range is -40 to 85°C. ROHS3 compliant and REACH unaffected.

Alternative Consideration: LF247DT and LF347DT

The LF247DT and LF347DT are J-FET operational amplifiers from STMicroelectronics with four circuits in 14-SOIC package. These parts feature lower supply current (1.4 mA vs. 2.2 mA) and lower output current per channel (40 mA vs. 70 mA). However, they operate at fixed supply voltage (44 V) rather than the variable range of the AD8513AR, and have significantly higher input offset voltage (3 mV vs. 100 µV). These parts are suitable only for applications with fixed 44 V supply and where higher input offset voltage is acceptable. ROHS3 compliant and REACH unaffected.

Not Recommended: MC33074ADR2G, MC33074DR2G, MC33179DR2G, MC34074ADR2G

These onsemi general-purpose operational amplifiers feature significantly higher input bias current (100 nA vs. 25 pA), making them unsuitable for applications requiring the ultra-low input bias current characteristic of the J-FET AD8513AR. These parts are general-purpose amplifiers rather than J-FET devices and should only be considered if the application does not depend on J-FET input characteristics.

Frequently Asked Questions (FAQ)

Q: Can the AD8513ARZ be used as a direct replacement for the AD8513AR?

A: Yes. The AD8513ARZ is electrically identical to the AD8513AR across all specified parameters. The only differences are product status (Active vs. Obsolete) and packaging format (Tube). No design modification is required.

Q: What is the primary reason to substitute the AD8513AR?

A: The AD8513AR is classified as obsolete. While inventory remains available, long-term component availability cannot be guaranteed. The AD8513ARZ provides identical functionality with active product status and modern regulatory compliance (ROHS3, REACH unaffected).

Q: Can the ADA4610-4ARZ replace the AD8513AR in all applications?

A: The ADA4610-4ARZ is functionally compatible with the AD8513AR for most applications. It provides superior performance with higher slew rate, higher bandwidth, and lower input bias current. However, applications sensitive to input offset voltage specifications may require evaluation, as the ADA4610-4ARZ specifies 400 µV maximum versus 100 µV for the AD8513AR. Both operate across the same supply voltage and temperature ranges.

Q: Why are the LF247DT and LF347DT not recommended as primary substitutes?

A: The LF247DT and LF347DT operate at fixed 44 V supply voltage, whereas the AD8513AR operates across 10–30 V. Additionally, these parts specify 3 mV input offset voltage compared to 100 µV for the AD8513AR. These differences make them unsuitable for applications designed around the AD8513AR's specifications unless the application is redesigned for fixed 44 V operation and higher input offset voltage.

Q: What is the difference between the MC33074 series and the AD8513AR?

A: The MC33074 series are general-purpose operational amplifiers with input bias current of 100 nA, compared to 25 pA for the AD8513AR. The AD8513AR uses J-FET input technology, which provides ultra-low input bias current. Applications requiring the low input bias current characteristic of J-FET devices cannot use general-purpose amplifiers as substitutes.

Q: Are all substitute parts available in the same 14-SOIC package?

A: Yes. All substitute parts listed are available in 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical compatibility with the AD8513AR. Packaging format (Tube, Tape & Reel, Cut Tape) may vary by part number and supplier.

Q: Do all substitute parts meet modern regulatory requirements?

A: The AD8513ARZ, ADA4610-4ARZ, LF247DT, LF347DT, LF347D, and OPA4131NA are all ROHS3 compliant and REACH unaffected. The MC33074 and MC34074 series are also ROHS3 compliant and REACH unaffected. Verify specific certifications with the supplier for your application requirements.

Q: What is the operating temperature range difference between substitute parts?

A: The AD8513AR and ADA4610-4ARZ operate across -40 to 125°C. The OPA4131NA operates across -40 to 85°C. The LF247DT operates across -40 to 105°C. The LF347D and LF347DT operate across 0 to 70°C. The MC33074, MC33179, and MC34074 series operate across -40 to 85°C or 0 to 70°C depending on part number. Select substitutes based on your application's temperature requirements.

Q: Can the OPA4131NA be used in place of the AD8513AR?

A: The OPA4131NA is a J-FET operational amplifier with compatible package and topology. However, it has lower slew rate (10 V/µs vs. 20 V/µs), lower output current per channel (25 mA vs. 70 mA), and narrower operating temperature range (-40 to 85°C vs. -40 to 125°C). It is suitable for applications where these reduced specifications are acceptable.

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