Part A
AD620BR
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4160 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD620BR and AD620AR-REEL are functionally interchangeable instrumentation amplifiers sharing the same pinout, package, and gain equation, with the BR grade offering tighter offset voltage and gain error tolerances. The AR-REEL is a valid drop-in substitute where the tighter BR-grade DC precision is not mandatory, though grade-dependent specifications should be validated against the application's error budget.
Package Type
High match
Pin Configuration
High match
Gain Range
High match
Input Offset Voltage Grade
Validation required
Parts at a glance
Part B
AD620AR-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4769 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, 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 | AD620BR | AD620AR-REEL | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 50 µV | 125 µV | Lower input offset voltage improves DC accuracy; the BR grade offers tighter offset than the AR grade. |
| Input Offset Voltage Drift (max) | 0.6 µV/°C | 1.0 µV/°C | Lower drift maintains accuracy over temperature; the BR grade is more stable across the operating range. |
| Input Bias Current (max) | 1.0 nA | 2.0 nA | Lower bias current reduces errors in high-impedance source applications; the BR grade is superior here. |
| Input Noise Voltage (1 kHz) | 9 nV/√Hz | 13 nV/√Hz | Lower voltage noise improves signal-to-noise ratio in low-level signal amplification; the BR grade is quieter. |
| Gain Error (G=1000, max) | 0.15% | 0.5% | Lower gain error provides more accurate amplification at high gains; the BR grade is more precise. |
| CMRR (G=1000, min) | 120 dB | 110 dB | Higher common-mode rejection improves performance in noisy environments; the BR grade rejects interference better. |
| Supply Voltage Range | ±2.3 V to ±18 V | ±2.3 V to ±18 V | Both parts support the same supply range, allowing identical power supply design. |
| Gain Range | 1 to 10000 | 1 to 10000 | Identical gain range means both can be used in the same amplifier configurations. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same temperature range ensures both parts are suitable for the same environmental conditions. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package allows drop-in replacement on the same PCB footprint. |
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 | AD620BR | AD620AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | 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 AD620BR and AD620AR-REEL?
Both are AD620 instrumentation amplifiers in the same 8-lead SOIC package, but they differ in grade and packaging. The AD620BR is the higher-grade B version with tighter specifications, while the AD620AR-REEL is the A-grade version supplied in tape-and-reel packaging for automated assembly. The B grade offers lower offset voltage, lower offset drift, lower input bias current, higher CMRR, and higher gain accuracy than the A grade.
What are the offset voltage specifications for the AD620BR versus the AD620AR?
The AD620BR has a maximum input offset voltage of 50 µV, while the AD620AR has a maximum input offset voltage of 125 µV. The B grade therefore provides roughly 2.5 times better offset accuracy, which matters in precision low-level signal applications.
How do the offset voltage drift specifications compare?
The AD620BR specifies a maximum input offset voltage drift of 0.6 µV/°C, whereas the AD620AR specifies a maximum drift of 1.0 µV/°C. The lower drift of the B grade improves stability over temperature in precision measurement designs.
How do the input bias current specifications differ between the two grades?
The AD620BR has a maximum input bias current of 1.0 nA, while the AD620AR has a maximum input bias current of 2.0 nA. Lower input bias current in the B grade reduces error in high-impedance source applications.
Do the AD620BR and AD620AR-REEL differ in CMRR and gain accuracy?
Yes. The AD620BR specifies a minimum CMRR of 100 dB (G = 10) and a maximum gain error of 0.15% (G = 10), while the AD620AR specifies a minimum CMRR of 93 dB (G = 10) and a maximum gain error of 0.5% (G = 10). The B grade provides better common-mode rejection and gain precision.
Are the AD620BR and AD620AR-REEL pin-compatible and functionally interchangeable?
Yes. Both devices are 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). They are functionally interchangeable, but the AD620BR provides tighter guaranteed specifications, so a design that requires B-grade performance should not substitute the A grade without verification.
What does the -REEL suffix indicate on the AD620AR-REEL?
The -REEL suffix indicates tape-and-reel packaging, which is intended for high-volume automated pick-and-place assembly. The AD620BR is also available in reel packaging under its own ordering code; the -REEL suffix on the AD620AR-REEL refers to packaging format, not to the device grade.
Do both parts share the same supply voltage range and operating temperature range?
Yes. Both the AD620BR and AD620AR-REEL operate from dual supplies of ±2.3 V to ±18 V and are specified over the industrial temperature range of -40°C to +85°C. The difference between the two parts is the guaranteed performance grade, not the supply or temperature ratings.