Part A
AD620BR
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4160 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD620BR and AD620AR-REEL7 are functionally interchangeable instrumentation amplifiers sharing the same pinout, package, and gain architecture, with the BR grade offering tighter gain and offset specifications. The BR grade is a valid functional replacement candidate for the AR-REEL7 in most designs, provided the tighter grade specifications are acceptable and the reel packaging format is not a requirement.
Package Type
High match
Pin Configuration
High match
Gain Range
High match
Grade Specifications
Validation required
Parts at a glance
Part B
AD620AR-REEL7
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4491 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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-REEL7 | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 50 µV | 125 µV | Lower offset voltage improves DC accuracy; the BR grade offers tighter offset than the AR grade, affecting precision measurement applications. |
| 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 temperature range. |
| Input Bias Current (max) | 1.0 nA | 2.0 nA | Lower bias current reduces errors in high-impedance source applications; the BR grade has tighter bias current specification. |
| Input Noise Voltage (max, 1 kHz) | 9 nV/√Hz | 13 nV/√Hz | Lower input noise improves signal-to-noise ratio for low-level signal amplification; the BR grade provides better noise performance. |
| Gain Error (max, G=1000) | 0.15% | 0.5% | Lower gain error improves gain accuracy at high gains; the BR grade offers tighter gain error specification. |
| CMRR (min, G=1000) | 110 dB | 100 dB | Higher common-mode rejection improves performance in noisy environments; the BR grade rejects common-mode signals better. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Both grades share the same industrial temperature range, so thermal operating limits are equivalent for substitutability. |
| 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 supply design. |
| Package / Mounting | 8-Lead SOIC | 8-Lead SOIC (tape and reel) | Same package footprint allows drop-in replacement; the AR-REEL7 is supplied on tape and reel for automated assembly. |
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-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| 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-REEL7?
Both are AD620 instrumentation amplifiers in an 8-lead SOIC package. The AD620BR is the higher-grade B version with tighter specifications, including lower input offset voltage (50 µV max vs. 125 µV max for the A grade), lower input offset drift (0.6 µV/°C max vs. 1.0 µV/°C max), lower input bias current (1.0 nA max vs. 2.0 nA max), and higher CMRR (100 dB min vs. 93 dB min at G=10). The AD620AR-REEL7 is the A-grade version supplied in tape-and-reel packaging for automated assembly.
Are the AD620BR and AD620AR-REEL7 pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with identical pin functions: RG, -IN, +IN, -VS, REF, OUTPUT, +VS, and RG. They can occupy the same PCB land pattern, though the AD620BR is also available in an 8-lead PDIP package, so package must be confirmed when ordering.
Can the AD620AR-REEL7 be used as a drop-in replacement for the AD620BR?
Electrically and pin-wise they are interchangeable in the same SOIC footprint, but the A grade has looser guaranteed specifications than the B grade. A substitution is acceptable only if the application's error budget tolerates the A-grade limits for offset voltage, offset drift, input bias current, and CMRR. Designs relying on B-grade accuracy should not substitute the A grade without validation.
What is the gain-setting configuration for both parts?
Both use the same single external resistor RG connected between pins 1 and 8 to set gain, per the equation G = 49.4 kΩ / RG + 1. This gain equation and the internal gain resistor architecture are identical across the AD620 A and B grades.
What supply voltage range do the AD620BR and AD620AR-REEL7 support?
Both operate from dual supplies of ±2.3 V to ±18 V (or a single supply of 4.6 V to 36 V), with the same quiescent current of 1.3 mA max. The supply range and power consumption specifications are common to both grades.
Why is the AD620AR-REEL7 supplied in tape-and-reel while the AD620BR may not be?
The "-REEL7" suffix denotes tape-and-reel packaging (7-inch reel) intended for high-volume automated pick-and-place assembly. The AD620BR is a grade designation and can be ordered in different packaging options; the reel suffix on the AR part reflects the ordering format rather than a performance difference.
Do both parts share the same operating temperature range?
Yes. Both the AD620BR and AD620AR-REEL7 are specified over the industrial temperature range of -40°C to +85°C, so temperature-related derating and thermal design considerations are the same for both grades.