Part A
AD620BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3666 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD620BRZ and AD620AR-REEL7 are both instrumentation amplifiers from the AD620 family sharing the same pinout, package, and core architecture, making them functionally interchangeable in most designs. The BRZ grade offers tighter gain accuracy and lower offset voltage, while the AR-REEL7 is supplied in reel packaging for high-volume assembly. Designers should verify grade-dependent specifications against their accuracy requirements before substituting.
Package Type
High match
Pin Configuration
High match
Gain Accuracy Grade
Validation required
Input Offset Voltage
Validation required
Parts at a glance
Part B
AD620AR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4491 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD620BRZ | AD620AR-REEL7 | Why it matters |
|---|---|---|---|
| Grade / Accuracy Class | B grade (higher precision) | A grade (standard precision) | The B grade offers tighter guaranteed specifications, so substituting an A grade in a precision circuit may degrade accuracy. |
| Input Offset Voltage (max) | 50 µV | 125 µV | Lower offset voltage reduces DC error at the output, which is critical for low-level signal amplification. |
| Input Offset Voltage Drift (max) | 0.6 µV/°C | 1.0 µV/°C | Lower drift maintains accuracy over temperature, important for instrumentation in varying environments. |
| Input Bias Current (max) | 1.0 nA | 2.0 nA | Lower bias current reduces errors when used with high source impedances. |
| Gain Error (max) | 0.15% | 0.70% | Tighter gain error improves gain accuracy in precision amplification applications. |
| CMRR (min, G=1000) | 120 dB | 110 dB | Higher common-mode rejection suppresses interference and improves measurement integrity. |
| Input Noise Voltage (1 kHz) | 9 nV/√Hz | 13 nV/√Hz | Lower noise improves signal-to-noise ratio for small-signal measurements. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature range means both parts suit the same environmental conditions. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Same package footprint allows drop-in replacement, though the reel packaging affects assembly handling. |
| Supply Voltage Range | ±2.3 V to ±18 V | ±2.3 V to ±18 V | Identical supply range ensures both parts operate in the same power systems. |
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 | AD620BRZ | AD620AR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Slew Rate | 1.2V/µs | 1.2V/µs |
| -3 dB Bandwidth | 1 MHz | 1 MHz |
| Current - Input Bias | 500 pA | 500 pA |
| Voltage - Input Offset | 15 µV | 30 µV |
| Supply Current | 900µA | 900µA |
| Current - Output / Channel | 18 mA | 18 mA |
| Voltage - Supply Span(Min) | 4.6 V | 4.6 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the main differences between the AD620BRZ and AD620AR-REEL7?
The AD620BRZ and AD620AR-REEL7 are both instrumentation amplifiers from Analog Devices based on the AD620. The primary differences are grade and packaging: the AD620BRZ is a B-grade device in a 8-lead SOIC tube package, while the AD620AR-REEL7 is an A-grade device supplied in a 7-inch tape and reel for automated assembly. The B-grade offers tighter specifications, including lower input offset voltage and lower offset voltage drift than the A-grade.
How do the offset voltage specifications compare between the AD620BRZ and AD620AR-REEL7?
The AD620BRZ (B-grade) has a maximum input offset voltage of 50 µV, while the AD620AR-REEL7 (A-grade) has a maximum input offset voltage of 125 µV. The B-grade also specifies lower offset voltage drift, making it preferable for precision DC applications.
Are the AD620BRZ and AD620AR-REEL7 pin-compatible?
Yes. Both devices are AD620 instrumentation amplifiers offered in the same 8-lead SOIC (R-8) package with identical pin functions. The difference is the grade (B vs A) and the delivery format (tube vs tape and reel), not the pinout.
Can the AD620AR-REEL7 be used as a drop-in replacement for the AD620BRZ?
Physically and functionally they are interchangeable in the same SOIC footprint, but the AD620AR-REEL7 is an A-grade device with looser offset voltage and drift specifications than the AD620BRZ. A substitution is acceptable only if the application can tolerate the A-grade limits; for precision DC circuits requiring the tighter B-grade specifications, the AD620BRZ should be retained.
What is the gain range and gain-setting method for these AD620 devices?
Both the AD620BRZ and AD620AR-REEL7 use a single external resistor (Rg) between pins 1 and 8 to set gain, with gain = 49.4 kΩ / Rg + 1. Gains from 1 to 10,000 are achievable, and both grades share the same gain equation and gain error characteristics.
Do the AD620BRZ and AD620AR-REEL7 differ in supply voltage or power consumption?
No. Both are AD620 instrumentation amplifiers operating from ±2.3 V to ±18 V dual supplies (or 4.6 V to 36 V single supply) with a typical supply current of 0.9 mA. Supply range and quiescent current are common to both grades.
Why would a design choose the AD620AR-REEL7 instead of the AD620BRZ?
The AD620AR-REEL7 is supplied in a 7-inch tape and reel, which suits high-volume automated pick-and-place assembly, and the A-grade is typically lower cost than the B-grade. It is appropriate where the wider offset voltage and drift limits of the A-grade are acceptable for the application.
Are the AD620BRZ and AD620AR-REEL7 specified over the same temperature range?
Yes. Both grades are specified for the industrial temperature range of −40 °C to +85 °C, so the choice between them is driven by precision grade and packaging format rather than operating temperature range.