Part A
AD620ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6931 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD620BR-REEL is a functionally compatible replacement candidate for the AD620ARZ, sharing the same instrumentation amplifier architecture, pinout, and package footprint, with the BR grade offering tighter gain and offset specifications. Designers should confirm the tighter grade tolerances and reel packaging format against their application and assembly requirements before substituting.
Amplifier Architecture
High match
Package and Pinout
High match
Gain and Offset Grade
Validation required
Packaging Format
Validation required
Parts at a glance
Part B
AD620BR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8897 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 | AD620ARZ | AD620BR-REEL | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 50 µV | 30 µV | Lower input offset voltage improves DC accuracy; the B grade offers tighter offset than the A grade, affecting precision in low-level signal amplification. |
| Input Offset Voltage Drift (max) | 0.6 µV/°C | 0.3 µV/°C | Lower drift maintains accuracy over temperature; the B grade is preferable for applications with wide temperature excursions. |
| Input Bias Current (max) | 1.0 nA | 0.5 nA | Lower bias current reduces errors in high-impedance source applications; the B grade provides better performance for such sensors. |
| Input Noise Voltage (max, 1 kHz) | 13 nV/√Hz | 9 nV/√Hz | Lower noise improves signal-to-noise ratio for small signals; the B grade is better suited for low-noise instrumentation front ends. |
| Gain Error (max, G=1000) | 0.15% | 0.10% | Tighter gain error improves gain accuracy at high gains; the B grade offers better gain precision for critical measurement chains. |
| CMRR (min, G=1000) | 110 dB | 120 dB | Higher common-mode rejection suppresses interference; the B grade provides superior rejection of common-mode noise in noisy environments. |
| Supply Voltage Range | ±2.3 V to ±18 V | ±2.3 V to ±18 V | Identical supply range means both parts are interchangeable for the same power rails and battery-operated or dual-supply designs. |
| Gain Range | 1 to 10000 | 1 to 10000 | Same programmable gain range via a single resistor ensures functional substitutability across instrumentation amplifier applications. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package and pinout allow drop-in replacement on the same PCB footprint without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same temperature rating ensures both parts meet the same environmental requirements for industrial and commercial applications. |
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 | AD620ARZ | AD620BR-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 | 30 µV | 15 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 AD620ARZ and AD620BR-REEL?
Both are AD620 instrumentation amplifiers in an 8-lead SOIC package. The AD620ARZ is a tube-packaged device with a specified gain error of 0.15% max (G=10) and a maximum input offset voltage of 125 µV. The AD620BR-REEL is a tape-and-reel packaged device with tighter specifications: gain error of 0.10% max (G=10) and maximum input offset voltage of 50 µV. The B grade also offers tighter gain nonlinearity (40 ppm max vs 100 ppm max at G=10).
Are the AD620ARZ and AD620BR-REEL functionally interchangeable in an existing design?
Yes, both are pin-compatible AD620 instrumentation amplifiers in the same 8-lead SOIC package with identical pin functions and the same gain equation (G = 49.4 kΩ/RG + 1). The AD620BR-REEL is a higher-grade version with tighter offset and gain specifications, so it can generally replace the ARZ grade where improved accuracy is acceptable, but the ARZ grade should not be substituted where the tighter B-grade specifications are required by the design.
What is the difference in input offset voltage between the two grades?
The AD620ARZ has a maximum input offset voltage of 125 µV, while the AD620BR-REEL has a maximum input offset voltage of 50 µV. Both are specified at ±15 V supplies and 25°C. The B grade provides better DC precision for applications requiring lower offset error.
Do the AD620ARZ and AD620BR-REEL differ in packaging or delivery format?
Yes. The AD620ARZ is supplied in tube packaging, while the AD620BR-REEL is supplied in tape-and-reel format for automated assembly. Both use the same 8-lead SOIC (R-8) package body, so the PCB footprint is identical.
What are the gain error specifications for each device?
At G=10, the AD620ARZ specifies a maximum gain error of 0.15%, while the AD620BR-REEL specifies a maximum gain error of 0.10%. Gain nonlinearity at G=10 is 100 ppm max for the ARZ and 40 ppm max for the BR grade. These tighter gain specifications make the B grade preferable for precision amplification.
Are the operating temperature ranges and supply requirements the same for both parts?
Yes. Both the AD620ARZ and AD620BR-REEL are specified over the industrial temperature range of −40°C to +85°C and operate on supply voltages from ±2.3 V to ±18 V (dual supply). Quiescent current is 1.3 mA max for both grades.
Which grade should be selected for a high-precision application?
The AD620BR-REEL is the better choice for high-precision applications because it offers lower maximum input offset voltage (50 µV vs 125 µV), tighter gain error (0.10% vs 0.15% at G=10), and lower gain nonlinearity (40 ppm vs 100 ppm at G=10). The AD620ARZ is suitable for applications where the looser A-grade specifications are acceptable.