Part A
AD627BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6920 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD627ARZ-RL and AD627BRZ are functionally interchangeable micropower instrumentation amplifiers sharing the same pinout, package, supply range, and gain configuration, with the BRZ grade offering tighter offset voltage and offset drift specifications. The ARZ-RL variant is supplied in tape-and-reel packaging, making it suitable for automated assembly, while the BRZ grade is preferable where enhanced DC precision is required. Both parts can serve as drop-in replacements for one another in most designs, provided the application's accuracy budget is validated against the selected grade.
Package Type
High match
Pin Configuration
High match
Supply Voltage Range
High match
Input Offset Voltage Grade
Validation required
Parts at a glance
Part B
AD627ARZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1465 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 | AD627ARZ-RL | AD627BRZ | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 150 µV | 75 µV | Lower offset voltage improves DC accuracy; the B grade offers tighter offset for precision measurement applications. |
| Input Offset Voltage Drift (max) | 1.0 µV/°C | 0.5 µV/°C | Lower drift maintains accuracy over temperature; the B grade is preferable for wide-temperature precision designs. |
| Input Bias Current (max) | 10 nA | 5 nA | Lower bias current reduces errors with high source impedances; the B grade suits high-impedance sensor interfaces. |
| Gain Error (max) | 0.10% | 0.05% | Gain error affects overall signal scaling accuracy; the B grade provides tighter gain accuracy. |
| Gain Nonlinearity (max) | 50 ppm | 25 ppm | Better nonlinearity means less distortion across the signal range; the B grade is better for high-linearity needs. |
| Input Voltage Noise (1 kHz, typ) | 27 nV/√Hz | 27 nV/√Hz | Noise floor sets the minimum resolvable signal; both grades share the same noise performance. |
| Supply Voltage Range | 2.2 V to 36 V | 2.2 V to 36 V | Wide single/dual supply range enables use in battery and industrial systems; identical for both grades. |
| Supply Current (max) | 85 µA | 85 µA | Low quiescent current is critical for portable/low-power designs; identical for both grades. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines environmental limits for the application; identical for both grades. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package determines PCB footprint and assembly; identical for both grades, allowing drop-in substitution. |
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 | AD627BRZ | AD627ARZ-RL |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.06V/µs | 0.06V/µs |
| -3 dB Bandwidth | 80 kHz | 80 kHz |
| Current - Input Bias | 2 nA | 2 nA |
| Voltage - Input Offset | 25 µV | 50 µV |
| Supply Current | 60µA | 60µA |
| Current - Output / Channel | 25 mA | 25 mA |
| Voltage - Supply Span(Min) | 2.2 V | 2.2 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 AD627ARZ-RL and AD627BRZ?
Both are AD627 micropower instrumentation amplifiers in an 8-lead SOIC package. The primary difference is the grade: the AD627ARZ-RL is the A-grade version, while the AD627BRZ is the higher-grade B version. The B-grade offers tighter guaranteed specifications, notably lower input offset voltage and offset voltage drift, and higher CMRR. The AD627ARZ-RL is supplied in tape-and-reel packaging (RL), whereas the AD627BRZ is supplied in standard tube packaging.
Are the AD627ARZ-RL and AD627BRZ pin-compatible and functionally interchangeable?
Yes. Both devices are AD627 instrumentation amplifiers in the same 8-lead SOIC (R-8) package with identical pin functions. They are functionally interchangeable in terms of pinout and gain-setting configuration. However, because the B-grade has tighter guaranteed specifications, substituting an A-grade device where a B-grade is specified may reduce system accuracy margin.
What is the gain-setting configuration for the AD627ARZ-RL and AD627BRZ?
Both devices set gain with a single external resistor connected between the RG pins. The gain is set by the relationship G = 200 kΩ / RG + 5, allowing gains from 5 to 1000. The external resistor value and the gain equation are the same for both grades.
How do the input offset voltage specifications compare between the two grades?
The AD627BRZ (B-grade) has a lower guaranteed maximum input offset voltage than the AD627ARZ-RL (A-grade). The B-grade is specified with tighter offset voltage limits, making it preferable for precision DC applications where offset error must be minimized. The A-grade has wider guaranteed offset limits.
How does offset voltage drift differ between the AD627ARZ-RL and AD627BRZ?
The AD627BRZ (B-grade) is specified with lower input offset voltage drift than the AD627ARZ-RL (A-grade). Lower drift improves accuracy over temperature in precision measurement applications. Designs requiring stable performance across temperature should account for this grade difference.
Do the AD627ARZ-RL and AD627BRZ have the same supply voltage and current specifications?
Yes. Both grades are micropower instrumentation amplifiers that operate from a single supply of 2.7 V to 12 V or dual supplies of ±1.35 V to ±6 V, and both draw a typical supply current of approximately 60 µA. The supply range and quiescent current are common to both grades.
What is the difference in packaging between the AD627ARZ-RL and AD627BRZ?
The AD627ARZ-RL is supplied in tape-and-reel format (the "RL" suffix), which is suited to automated pick-and-place production lines. The AD627BRZ is supplied in standard tube packaging. Both use the same 8-lead SOIC body, so PCB footprint and assembly are unaffected by the packaging choice.
Which grade should be selected for a precision low-drift design?
For precision designs requiring the tightest guaranteed offset voltage and lowest offset drift, the AD627BRZ (B-grade) is the appropriate choice because its guaranteed specifications are tighter than those of the AD627ARZ-RL (A-grade). The A-grade is suitable where the wider guaranteed limits are acceptable for the application.