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-REEL share the same instrumentation amplifier core, package footprint, and pinout, making them functionally interchangeable in most designs. The BRZ grade offers tighter gain error and lower offset voltage specifications, so it can directly replace the AR-REEL grade with improved precision, while the AR-REEL grade remains adequate where the tighter BRZ tolerances are not required.
Package Type
High match
Pin Configuration
High match
Gain Error Grade
Validation required
Input Offset Voltage
Validation required
Parts at a glance
Part B
AD620AR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4769 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-REEL | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 50 µV | 125 µV | Lower offset voltage improves DC accuracy; the B grade offers tighter offset than the A grade, affecting precision measurement error. |
| Input Offset Voltage Drift (max) | 0.6 µV/°C | 1.0 µV/°C | Lower drift maintains accuracy over temperature; the B grade is more stable across the operating range. |
| Input Bias Current (max) | 1.0 nA | 2.0 nA | Lower bias current reduces error in high-impedance source applications; the B grade has tighter bias current specification. |
| Gain Error (max, G=1000) | 0.15% | 0.5% | Gain error affects amplification accuracy; the B grade provides tighter gain accuracy for precision instrumentation. |
| CMRR (min, G=1000) | 120 dB | 110 dB | Higher common-mode rejection suppresses interference; the B grade rejects common-mode signals better in noisy environments. |
| Input Voltage Noise (1 kHz) | 9 nV/√Hz | 9 nV/√Hz | Noise floor affects signal fidelity for low-level signals; both grades share the same typical noise performance. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Defines the environmental range for reliable operation; both grades are specified over the same industrial temperature range. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, reel) | Package and packaging format affect PCB assembly; both are SOIC but the reel option suits high-volume automated placement. |
| Supply Voltage Range | ±2.3 V to ±18 V | ±2.3 V to ±18 V | Determines compatibility with the system power rails; both grades support the same wide dual-supply range. |
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-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| 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-REEL?
The AD620BRZ and AD620AR-REEL are both instrumentation amplifiers from Analog Devices based on the AD620 architecture, but they differ in grade and packaging. The AD620BRZ is a B-grade device in an 8-lead SOIC package (RoHS-compliant, tube/tray format), offering tighter specifications such as lower input offset voltage and higher gain accuracy. The AD620AR-REEL is an A-grade device supplied in tape-and-reel packaging for automated assembly, with wider tolerance specifications than the B-grade. Both share the same pinout and function, but the B-grade provides superior DC precision.
Are the AD620BRZ and AD620AR-REEL pin-compatible?
Yes. Both devices are offered in the standard 8-lead SOIC (R-8) package with the same pinout: pin 1 and pin 8 are gain-setting resistor terminals, pins 2 and 3 are the inverting and non-inverting inputs, pin 4 is -VS, pin 5 is REF, pin 6 is OUTPUT, and pin 7 is +VS. This allows them to be used interchangeably on the same PCB footprint, provided the grade-specific performance differences are acceptable for the application.
How do the input offset voltage specifications compare between the two grades?
The AD620B grade (AD620BRZ) specifies a maximum input offset voltage of 50 µV, while the AD620A grade (AD620AR-REEL) specifies a maximum input offset voltage of 125 µV. The B grade also offers lower offset voltage drift (0.6 µV/°C max vs. 1.0 µV/°C max for the A grade). These differences make the B grade preferable for precision DC applications where offset error must be minimized.
What is the difference in gain error between the AD620BRZ and AD620AR-REEL?
The AD620B grade (AD620BRZ) has a maximum gain error of 0.15% at G = 10, while the AD620A grade (AD620AR-REEL) has a maximum gain error of 0.30% at G = 10. Both grades use a single external resistor to set gain from 1 to 10,000, but the B grade provides tighter gain accuracy for precision signal conditioning.
Do both parts share the same supply voltage and power consumption specifications?
Yes. Both the AD620BRZ and AD620AR-REEL operate over a supply range of ±2.3 V to ±18 V (dual supply) and draw a maximum supply current of 1.3 mA. Both offer the same bandwidth (800 kHz at G = 10), slew rate (1.2 V/µs), and CMRR (100 dB min at G = 10). The core electrical performance excluding grade-specific DC specifications is identical.
Why would a designer choose the AD620AR-REEL over the AD620BRZ?
The AD620AR-REEL is supplied in tape-and-reel packaging, which is optimized for high-volume automated pick-and-place assembly lines. It is also typically lower in cost than the B grade. For applications where the wider offset voltage (125 µV max) and gain error (0.30% max) tolerances are acceptable, the A-grade reel format offers a cost-effective, production-friendly solution.
Are both devices RoHS compliant and rated for the same temperature range?
Yes. Both the AD620BRZ and AD620AR-REEL are RoHS-compliant and specified for the industrial temperature range of -40°C to +85°C. The "Z" suffix in AD620BRZ denotes the RoHS-compliant SOIC package, and the AD620AR-REEL is likewise supplied in a RoHS-compliant SOIC package in reel form.
Can the AD620AR-REEL be used as a drop-in replacement for the AD620BRZ in an existing design?
Because both parts share the same 8-lead SOIC package and pinout, the AD620AR-REEL is physically a drop-in replacement for the AD620BRZ. However, the designer must verify that the wider A-grade tolerances (offset voltage up to 125 µV, offset drift up to 1.0 µV/°C, gain error up to 0.30%) still meet the system error budget. If the design was validated against B-grade precision, substituting the A grade may require re-evaluation of DC accuracy.