AD8610AR Equivalent & Substitute Parts

Part Overview

The AD8610AR is a J-FET input operational amplifier manufactured by Analog Devices Inc., housed in an 8-SOIC surface mount package. This device is classified as obsolete, though 100,238 pieces remain in stock as new original inventory. The AD8610AR serves applications requiring low input bias current, low input offset voltage, and moderate bandwidth in a compact surface mount form factor. Due to its obsolete status, identification of equivalent and substitute parts is necessary for design continuity, long-term supply assurance, and new project implementations.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Slew Rate	60	V/µs
Gain Bandwidth Product	25	MHz
Current - Input Bias	3	pA
Voltage - Input Offset	85	µV
Current - Supply	3	mA
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	26	V
Operating Temperature	-40 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the AD8610AR is determined by alignment of critical electrical and mechanical parameters. The primary substitution criteria are:

Direct Substitutes (Identical Specifications): The AD8610ARZ represents a direct substitute, maintaining identical electrical performance across all key parameters: J-FET amplifier type, 60 V/µs slew rate, 25 MHz gain bandwidth product, 3 pA input bias current, 85 µV input offset voltage, and 8-SOIC package. The distinction is packaging format (tube versus reel) and active product status.

Similar Substitutes (Compatible Electrical Performance): Substitute parts are grouped based on compatibility within the following parameter ranges:

Amplifier topology: J-FET or General Purpose types with comparable input characteristics
Slew rate: 35 V/µs or greater
Gain bandwidth product: 6.5 MHz or greater
Input bias current: 2 pA or greater (lower is acceptable)
Input offset voltage: up to 1 mV
Output current capability: 20 mA or greater
Supply voltage range: minimum 9 V to 10 V, maximum 26 V or greater
Package: 8-SOIC form factor
Operating temperature: overlap with -40°C to 125°C range or extended commercial range

Parts meeting these criteria are suitable for applications where the AD8610AR specifications are required, with engineering evaluation of specific parameter deviations.

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)	Package	Status
AD8610AR	Analog Devices	J-FET	60	25	3	85	3	45	10	26	-40 to 125	8-SOIC	Obsolete
AD8610ARZ	Analog Devices	J-FET	60	25	3	85	3	45	10	26	-40 to 125	8-SOIC	Active
LT1357CS8#PBF	Analog Devices	Voltage Feedback	600	25	120	200	2	30	5	30	0 to 70	8-SOIC	Active
LT1357CS8#TRPBF	Analog Devices	Voltage Feedback	600	25	120	200	2	30	5	30	0 to 70	8-SOIC	Active
OPA602AU	Texas Instruments	General Purpose	35	6.5	2	1000	3	20	10	36	-25 to 85	8-SOIC	Active
OPA602AU/2K5	Texas Instruments	General Purpose	35	6.5	2	1000	3	20	10	36	-25 to 85	8-SOIC	Active
OPA627AU	Texas Instruments	General Purpose	55	16	2	130	7	45	9	36	-25 to 85	8-SOIC	Active
OPA627AU/2K5	Texas Instruments	General Purpose	55	16	2	130	7	45	9	36	-25 to 85	8-SOIC	Active
OPA637AU	Burr Brown	General Purpose	135	80	2	130	7	45	9	36	-25 to 85	8-SOIC	Active
OPA637AU/2K5	Texas Instruments	General Purpose	135	80	2	130	7	45	9	36	-25 to 85	8-SOIC	Active
TLE2071ACD	Texas Instruments	J-FET	45	10	20	470	1.7	48	4.5	38	0 to 70	8-SOIC	Last Time Buy

Engineering Selection Recommendations

Primary Recommendation: AD8610ARZ

The AD8610ARZ is the direct equivalent to the AD8610AR, providing identical electrical specifications and performance characteristics. This part maintains J-FET amplifier topology, 60 V/µs slew rate, 25 MHz gain bandwidth product, and all input/output current specifications. The AD8610ARZ carries active product status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory alignment. Packaging is available in tube format with 2,100 pieces in stock.

Secondary Recommendations: OPA627AU and OPA627AU/2K5

The OPA627AU series (Texas Instruments, Difet® technology) provides enhanced performance with 55 V/µs slew rate and 16 MHz gain bandwidth product. These parts maintain 2 pA input bias current, 45 mA output current capability, and 8-SOIC package compatibility. Operating temperature range is -25°C to 85°C, which covers the commercial portion of the AD8610AR range. Both tube and tape & reel packaging options are available with active product status and ROHS3 compliance. Supply voltage range extends to 36 V maximum, providing broader application flexibility.

Alternative Consideration: OPA637AU and OPA637AU/2K5

The OPA637AU series offers significantly enhanced bandwidth (80 MHz gain bandwidth product) and slew rate (135 V/µs) while maintaining 2 pA input bias current and 45 mA output current. These parts are suitable for applications requiring higher frequency performance. Operating temperature range is -25°C to 85°C. ROHS3 compliance and REACH unaffected status are confirmed for the /2K5 variant.

Not Recommended for Direct Substitution:

The LT1357CS8 series employs voltage feedback topology rather than J-FET input architecture, resulting in significantly higher input bias current (120 nA) and input offset voltage (200 µV). Operating temperature range is limited to 0°C to 70°C. While electrical performance is adequate for some applications, the topology change and temperature range limitation make this unsuitable as a direct replacement.

The TLE2071ACD is J-FET based but exhibits higher input bias current (20 pA), higher input offset voltage (470 µV), lower slew rate (45 V/µs), and lower gain bandwidth product (10 MHz). Product status is Last Time Buy, indicating discontinued supply. This part is not recommended for new designs.

The OPA602AU series provides lower gain bandwidth product (6.5 MHz) and lower output current (20 mA), making it unsuitable for applications requiring the AD8610AR's 25 MHz bandwidth and 45 mA output capability.

Frequently Asked Questions (FAQ)

Q: Can the AD8610ARZ be used as a direct replacement for the AD8610AR?

A: Yes. The AD8610ARZ is electrically and functionally identical to the AD8610AR across all specified parameters. The primary difference is packaging format (tube versus reel) and product status (active versus obsolete). Both parts are housed in 8-SOIC packages and maintain identical electrical performance.

Q: What is the key difference between J-FET and voltage feedback amplifier topologies?

A: J-FET input amplifiers, such as the AD8610AR and AD8610ARZ, feature extremely low input bias current (3 pA) and low input offset voltage (85 µV). Voltage feedback amplifiers, such as the LT1357CS8 series, exhibit higher input bias current (120 nA) and higher input offset voltage (200 µV). Applications requiring high input impedance and minimal input current loading require J-FET topology.

Q: Are the OPA627AU and OPA637AU suitable replacements for the AD8610AR?

A: The OPA627AU and OPA637AU are compatible substitutes for applications where enhanced bandwidth and slew rate are beneficial or acceptable. Both maintain 2 pA input bias current and 45 mA output current capability in 8-SOIC packages. However, operating temperature range is limited to -25°C to 85°C, which does not extend to the AD8610AR's -40°C minimum. Applications requiring full -40°C to 125°C operation must use the AD8610ARZ.

Q: What packaging options are available for substitute parts?

A: The AD8610ARZ is available in tube packaging. The OPA627AU series is available in both tube (OPA627AU) and cut tape with digi-reel (OPA627AU/2K5) formats. The OPA637AU/2K5 is available in cut tape with digi-reel format. All substitute parts maintain 8-SOIC (0.154", 3.90mm width) package dimensions, ensuring mechanical compatibility with existing PCB layouts.

Q: Does the AD8610ARZ meet RoHS and REACH compliance requirements?

A: Yes. The AD8610ARZ is ROHS3 compliant and REACH unaffected. The OPA627AU/2K5 and OPA637AU/2K5 are also ROHS3 compliant and REACH unaffected. Compliance documentation should be verified with the component supplier for specific procurement batches.

Q: Why is the TLE2071ACD not recommended as a substitute?

A: The TLE2071ACD exhibits significantly degraded electrical performance compared to the AD8610AR: input bias current is 20 pA (versus 3 pA), input offset voltage is 470 µV (versus 85 µV), slew rate is 45 V/µs (versus 60 V/µs), and gain bandwidth product is 10 MHz (versus 25 MHz). Additionally, product status is Last Time Buy, indicating supply discontinuation. This part is unsuitable for new designs and applications requiring AD8610AR performance.

Q: Can substitute parts be used in existing designs without circuit modification?

A: The AD8610ARZ can be used without modification due to identical specifications. For OPA627AU and OPA637AU substitutes, circuit evaluation is necessary to confirm compatibility with application requirements, particularly regarding operating temperature range (-25°C to 85°C versus -40°C to 125°C) and supply voltage range. Pin-to-pin compatibility is maintained across all 8-SOIC packages listed.

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