Part A
AD8620BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1672 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8620AR-REEL7 is a viable functional substitute for the AD8620BRZ in most precision JFET-input applications, as both share the same dual op-amp architecture, SOIC-8 footprint, and wide supply range. However, the AD8620BRZ offers tighter grade specifications, so designs requiring the B-grade's tighter offset voltage and drift limits should validate performance before substituting the A-grade reel variant.
Amplifier Architecture
High match
Package and Pinout
High match
Supply Voltage Range
High match
Grade and Offset Specifications
Validation required
Parts at a glance
Part B
AD8620AR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6009 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8620BRZ | AD8620AR-REEL7 | Why it matters |
|---|---|---|---|
| Grade / Temperature Range | B grade, -40°C to +125°C | A grade, -40°C to +85°C | The B grade is specified over a wider temperature range, making it suitable for harsher environments where the A grade may not be guaranteed. |
| Input Offset Voltage (max) | 100 µV | 250 µV | Lower offset voltage improves DC precision; the B grade offers tighter matching for high-accuracy signal chains. |
| Input Offset Voltage Drift (max) | 1 µV/°C | 2 µV/°C | Lower drift maintains accuracy over temperature; the B grade is preferable for precision applications across temperature. |
| Input Bias Current (max) | 10 pA | 10 pA | Very low bias current suits high-impedance sensors; both grades share the same JFET input characteristic. |
| Gain Bandwidth Product | 25 MHz | 25 MHz | Identical bandwidth means AC performance and stability behavior are the same for both grades. |
| Slew Rate | 60 V/µs | 60 V/µs | Same slew rate ensures comparable large-signal transient response in both parts. |
| Supply Voltage Range | ±5 V to ±13 V | ±5 V to ±13 V | Identical supply range allows drop-in substitution in the same circuit rails. |
| Input Voltage Noise Density | 6 nV/√Hz | 6 nV/√Hz | Same noise performance means SNR in low-level signal applications is unaffected by grade choice. |
| Package / Mounting | 8-SOIC, surface mount | 8-SOIC, surface mount (tape and reel) | Same package footprint enables direct board replacement; the reel option affects assembly handling only. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8620BRZ | AD8620AR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 2 | 2 |
| Slew Rate | 60V/µs | 60V/µs |
| Gain Bandwidth Product | 25 MHz | 25 MHz |
| Current - Input Bias | 3 pA | 3 pA |
| Voltage - Input Offset | 45 µV | 85 µV |
| Supply Current | 3mA (x2 Channels) | 3mA (x2 Channels) |
| Current - Output / Channel | 45 mA | 45 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 26 V | 26 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8620BRZ and AD8620AR-REEL7?
The AD8620BRZ is the B-grade version in a 8-lead SOIC tube package, while the AD8620AR-REEL7 is the A-grade version in an 8-lead SOIC tape-and-reel package. The B-grade offers tighter guaranteed specifications, including lower offset voltage and lower input bias current, than the A-grade.
Are the AD8620BRZ and AD8620AR-REEL7 functionally interchangeable in an existing design?
Both are dual, low-noise, precision JFET-input operational amplifiers in the same 8-lead SOIC footprint and share the same pinout, so they are functionally interchangeable in most circuits. However, the B-grade provides tighter guaranteed limits, so a design requiring B-grade performance should not be downgraded to the A-grade without verifying the relaxed specifications against the circuit requirements.
What are the guaranteed input offset voltage specifications for each grade?
The AD8620B grade is specified with a maximum input offset voltage of 100 µV, while the AD8620A grade is specified with a maximum input offset voltage of 250 µV, per the Analog Devices datasheet.
How do the input bias current specifications differ between the two grades?
The AD8620B grade guarantees a maximum input bias current of 10 pA at 25°C, whereas the AD8620A grade guarantees a maximum input bias current of 25 pA at 25°C, according to the Analog Devices datasheet.
Do both parts share the same supply voltage range and quiescent current?
Yes. Both the AD8620BRZ and AD8620AR-REEL7 operate from a dual supply of ±5 V to ±13 V and draw a typical supply current of 3.5 mA per amplifier, as specified in the Analog Devices datasheet.
What is the difference in packaging between the AD8620BRZ and AD8620AR-REEL7?
The AD8620BRZ is supplied in 8-lead SOIC tubes, while the AD8620AR-REEL7 is supplied in 8-lead SOIC tape-and-reel packaging with a 7-inch reel, making the latter suited to automated high-volume assembly.
Do both grades share the same noise and bandwidth performance?
Yes. Both grades are specified with a typical voltage noise density of 6 nV/√Hz at 1 kHz and a gain bandwidth product of 25 MHz, per the Analog Devices datasheet.
Which grade should be selected for a precision low-offset application?
The AD8620BRZ should be selected for precision applications requiring tighter offset and bias current limits, since its guaranteed maximum input offset voltage (100 µV) and input bias current (10 pA) are lower than those of the AD8620AR-REEL7.