AD820AR-REEL7 Equivalent & Substitute Parts

Part Overview

The AD820AR-REEL7 is a J-FET input operational amplifier manufactured by Analog Devices Inc., designed for rail-to-rail signal processing applications. This device integrates a single amplifier circuit in an 8-SOIC surface mount package with a supply voltage range of 5V to 36V and operates across the industrial temperature range of -40°C to 85°C.

The AD820AR-REEL7 carries an obsolete product status. Locating equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for legacy systems utilizing this component.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	3	V/µs
Gain Bandwidth Product	1.8	MHz
-3dB Bandwidth	1.9	MHz
Current - Input Bias	2	pA
Voltage - Input Offset	400	µV
Current - Supply	700	µA
Current - Output / Channel	20	mA
Voltage - Supply Span (Min)	5	V
Voltage - Supply Span (Max)	36	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

Substitution of the AD820AR-REEL7 is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Must Match):

Amplifier Type: J-FET
Number of Circuits: 1
Output Type: Rail-to-Rail
Slew Rate: 3 V/µs
Gain Bandwidth Product: 1.8 MHz
-3dB Bandwidth: 1.9 MHz
Current - Input Bias: 2 pA
Voltage - Input Offset: 400 µV
Current - Supply: 700 µA
Current - Output / Channel: 20 mA
Voltage - Supply Span: 5V to 36V
Operating Temperature: -40°C to 85°C

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts listed below satisfy these electrical and mechanical requirements and are manufactured by Analog Devices Inc. under the AD820 base product number.

Parameter Comparison

Parameter	AD820AR-REEL7 (Main)	AD820ARZ-REEL7 (Substitute)	AD820ARZ-REEL (Substitute)
Manufacturer	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active
Amplifier Type	J-FET	J-FET	J-FET
Number of Circuits	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	3	3	3
Gain Bandwidth Product (MHz)	1.8	1.8	1.8
-3dB Bandwidth (MHz)	1.9	1.9	1.9
Current - Input Bias (pA)	2	2	2
Voltage - Input Offset (µV)	400	400	400
Current - Supply (µA)	700	700	700
Current - Output / Channel (mA)	20	20	20
Voltage - Supply Span (Min) (V)	5	5	5
Voltage - Supply Span (Max) (V)	36	36	36
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant
REACH Status	—	REACH Unaffected	REACH Unaffected
Packaging Type	—	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

The AD820AR-REEL7 is classified as obsolete. Both substitute parts—AD820ARZ-REEL7 and AD820ARZ-REEL—carry active product status and are manufactured by Analog Devices Inc.

AD820ARZ-REEL7 is the primary substitute. This part maintains identical electrical and mechanical specifications to the AD820AR-REEL7 while offering active product status, ROHS3 compliance, and REACH unaffected certification. Inventory availability is 65,572 units.

AD820ARZ-REEL is a secondary substitute with identical electrical and mechanical specifications, active product status, ROHS3 compliance, and REACH unaffected certification. Inventory availability is 5,935 units. This part differs only in packaging designation (standard Digi-Reel versus the -REEL7 variant).

Both substitute parts are suitable for direct replacement in applications currently utilizing the AD820AR-REEL7, with no circuit redesign required.

Frequently Asked Questions (FAQ)

Q: Can AD820ARZ-REEL7 or AD820ARZ-REEL be used as direct replacements for AD820AR-REEL7?

A: Yes. Both substitute parts are electrically and mechanically equivalent to the AD820AR-REEL7. All electrical parameters, including slew rate, gain bandwidth product, input bias current, supply voltage range, and operating temperature, are identical. Both parts use the same 8-SOIC package and surface mount technology.

Q: What is the difference between AD820ARZ-REEL7 and AD820ARZ-REEL?

A: Both parts are electrically identical and use the same 8-SOIC package. The difference lies in packaging designation: AD820ARZ-REEL7 is supplied in Digi-Reel format, while AD820ARZ-REEL is supplied in standard Cut Tape and Digi-Reel format. Selection depends on procurement and assembly requirements.

Q: Why is the AD820AR-REEL7 obsolete?

A: The AD820AR-REEL7 carries obsolete product status. The active equivalents AD820ARZ-REEL7 and AD820ARZ-REEL provide continued access to this J-FET amplifier topology with modern compliance certifications.

Q: Are the substitute parts RoHS and REACH compliant?

A: Yes. Both AD820ARZ-REEL7 and AD820ARZ-REEL are ROHS3 compliant and REACH unaffected.

Q: What is the moisture sensitivity level for these parts?

A: All three parts—AD820AR-REEL7, AD820ARZ-REEL7, and AD820ARZ-REEL—carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Can these parts operate across the full industrial temperature range?

A: Yes. All three parts operate across -40°C to 85°C, supporting industrial and extended commercial applications.

Q: What is the supply voltage range for these operational amplifiers?

A: All three parts support a supply voltage span of 5V to 36V, enabling operation in both low-voltage and higher-voltage circuit designs.

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