Part A
AD627ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4972 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD627BRZ-R7 and AD627ARZ are functionally interchangeable instrumentation amplifiers sharing the same pinout, supply range, and gain configuration, with the BRZ grade offering tighter offset voltage and gain error tolerances. The ARZ variant is a valid drop-in substitute where the tighter precision specifications of the BRZ grade are not mandatory, though applications sensitive to input offset drift and gain accuracy should validate performance against the relaxed grade limits.
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
AD627BRZ-R7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6496 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 | AD627BRZ-R7 | AD627ARZ | Why it matters |
|---|---|---|---|
| Grade / Temperature Range | B grade, -40°C to +85°C | A grade, -40°C to +85°C | The B grade is a higher-precision bin than the A grade, so offset and gain specifications are tighter; this affects accuracy-sensitive designs. |
| Input Offset Voltage (max) | ±150 µV (B grade) | ±250 µV (A grade) | Lower offset voltage reduces DC error at the output, which is critical for precision instrumentation and low-level signal amplification. |
| Input Offset Voltage Drift (max) | ±1 µV/°C (B grade) | ±3 µV/°C (A grade) | Drift determines how stable the offset remains over temperature; tighter drift is important for applications spanning wide temperature ranges. |
| Input Bias Current (max) | ±10 nA (B grade) | ±25 nA (A grade) | Bias current interacts with source impedance to create offset errors; lower bias current supports higher-impedance sensor interfaces. |
| Gain Error (max) | 0.05% (B grade) | 0.10% (A grade) | Gain error directly affects the accuracy of the amplified signal; tighter gain error improves overall measurement precision. |
| Gain Nonlinearity (max) | 10 ppm (B grade) | 20 ppm (A grade) | Nonlinearity limits accuracy at larger signal swings; lower nonlinearity is preferred for high-resolution data acquisition. |
| CMRR (min) | 90 dB (B grade) | 83 dB (A grade) | Common-mode rejection determines how well the amplifier rejects unwanted common-mode signals; higher CMRR improves noise immunity. |
| Supply Voltage Range | 2.2 V to ±18 V (single/dual supply) | 2.2 V to ±18 V (single/dual supply) | Both parts support the same wide supply range, allowing operation in low-voltage portable and higher-voltage industrial systems. |
| Package | 8-lead SOIC (R-8) | 8-lead SOIC (R-8) | Identical package and pinout enable drop-in board-level substitution without layout changes. |
| Supply Current (max) | 85 µA | 85 µA | Low quiescent current is important for battery-powered and portable instrumentation; both parts share the same low-power characteristic. |
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 | AD627ARZ | AD627BRZ-R7 |
|---|---|---|
| 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 | 50 µV | 25 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 is the primary difference between the AD627BRZ-R7 and the AD627ARZ?
The main difference is the grade and packaging. The AD627BRZ-R7 is a B-grade device supplied in a 7-inch reel (R7) for automated assembly, while the AD627ARZ is an A-grade device supplied in a standard tube. The B-grade offers tighter guaranteed specifications than the A-grade.
Are the AD627BRZ-R7 and AD627ARZ electrically interchangeable in an existing design?
Yes, both are pin-compatible AD627 instrumentation amplifiers in the same 8-lead SOIC package. However, because the B-grade has tighter offset voltage, offset drift, and gain error specifications than the A-grade, substituting an A-grade for a B-grade may reduce precision margin in demanding applications.
What are the guaranteed input offset voltage specifications for each grade?
The AD627A grade is specified with a maximum input offset voltage of 250 µV, while the AD627B grade is specified with a maximum input offset voltage of 150 µV, per the Analog Devices datasheet.
How do the offset voltage drift specifications compare between the two grades?
The AD627A grade has a maximum input offset voltage drift of 2 µV/°C, whereas the AD627B grade is specified at a maximum of 1 µV/°C over the specified temperature range.
Do both parts share the same supply voltage and gain configuration?
Yes. Both the AD627BRZ-R7 and AD627ARZ operate from a single supply of 2.2 V to 36 V (or dual supplies of ±1.1 V to ±18 V) and use the same external resistor to set gain from 1 to 1000, as defined in the AD627 datasheet.
Why would a design choose the AD627BRZ-R7 over the AD627ARZ?
The AD627BRZ-R7 is preferred when tighter offset voltage, lower offset drift, and reel packaging for high-volume automated placement are required. The AD627ARZ is suitable for less demanding precision applications or prototyping where tube packaging is acceptable.
Are the AD627BRZ-R7 and AD627ARZ RoHS compliant?
Yes. Both the AD627BRZ-R7 and AD627ARZ are RoHS-compliant parts, indicated by the "Z" suffix in the ordering code per Analog Devices ordering guidelines.