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 AD627ARZ and AD627BR-REEL7 are functionally compatible instrumentation amplifiers sharing the same core architecture, pinout, and supply range, making the AD627BR-REEL7 a viable replacement candidate for the AD627ARZ in most designs. The primary distinction lies in grade-level precision specifications, so validation against the tighter offset voltage, offset drift, and gain error tolerances of the BR grade is recommended before committing to production substitution.
Amplifier Architecture
High match
Package and Pinout
High match
Input Offset Voltage Grade
Validation required
Gain Error and Drift Grade
Validation required
Parts at a glance
Part B
AD627BR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3634 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 | AD627ARZ | AD627BR-REEL7 | Why it matters |
|---|---|---|---|
| Grade / Accuracy Class | A grade | B grade | The B grade offers tighter guaranteed specifications (offset, gain error, drift), which directly affects measurement accuracy in precision signal-conditioning designs. |
| Input Offset Voltage (max) | ±150 µV | ±100 µV | Lower maximum offset voltage reduces DC error at the output, critical for low-level sensor amplification where offset dominates total error. |
| Input Offset Voltage Drift (max) | ±1 µV/°C | ±0.5 µV/°C | Drift determines offset stability over temperature; the B grade's tighter drift improves accuracy in environments with varying temperature. |
| Gain Error (max) | 0.10% | 0.05% | Gain error affects the scaling accuracy of the amplified signal; a lower guaranteed gain error improves overall system precision. |
| Gain Nonlinearity (max) | 20 ppm | 10 ppm | Nonlinearity limits distortion and accuracy across the signal range; the B grade provides better linearity for high-fidelity measurements. |
| Input Noise (0.1 Hz to 10 Hz, typ) | 3 µV p-p | 3 µV p-p | Low-frequency noise sets the resolution floor for DC and low-frequency signals; both grades share similar typical noise performance. |
| Supply Voltage Range | 2.2 V to ±18 V | 2.2 V to ±18 V | Wide supply range enables operation from single low-voltage rails or split supplies, supporting flexible system architectures. |
| Supply Current (max) | 85 µA | 85 µA | Low quiescent current is essential for battery-powered and portable instrumentation where power budget is constrained. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Identical package and footprint allow drop-in substitution; the reel packaging affects assembly handling rather than electrical function. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching industrial temperature range ensures both parts are suitable for the same application environments. |
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 | AD627BR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| 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 are the key differences between the AD627ARZ and AD627BR-REEL7?
Both are AD627 micropower instrumentation amplifiers from Analog Devices in an 8-lead SOIC package. The AD627ARZ is supplied in tube packaging and is specified with a maximum input offset voltage of 250 µV and a gain error of 0.35% (G = 5 to 1000). The AD627BR-REEL7 is the higher-grade B version supplied on a 7-inch tape-and-reel, with a maximum input offset voltage of 150 µV and a gain error of 0.25%. Both share the same pinout, supply range of 2.2 V to 36 V (single supply) or ±1.1 V to ±18 V (dual supply), and 85 µA maximum supply current.
Are the AD627ARZ and AD627BR-REEL7 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, so they are pin-compatible. They are functionally interchangeable in most circuits, but the AD627BR-REEL7 offers tighter offset voltage and gain error specifications, so a design that requires the B-grade limits should not substitute the A grade without verifying performance.
What is the difference in input offset voltage between the two grades?
The AD627ARZ is specified with a maximum input offset voltage of 250 µV, while the AD627BR-REEL7 is specified with a maximum input offset voltage of 150 µV. Both are tested at the same supply and temperature conditions per the Analog Devices datasheet.
How do the gain error specifications compare?
The AD627ARZ has a maximum gain error of 0.35% for gains from 5 to 1000, whereas the AD627BR-REEL7 has a maximum gain error of 0.25% over the same gain range. The gain equation and external resistor configuration are identical for both grades.
What supply voltage range do both parts support?
Both the AD627ARZ and AD627BR-REEL7 operate from a single supply of 2.2 V to 36 V or a dual supply of ±1.1 V to ±18 V, with a maximum quiescent supply current of 85 µA. These specifications are common to both grades per the AD627 datasheet.
What packaging difference exists between the AD627ARZ and AD627BR-REEL7?
The AD627ARZ is supplied in standard tube packaging, while the AD627BR-REEL7 is supplied on a 7-inch tape-and-reel for automated pick-and-place assembly. Both use the same 8-lead SOIC body and are RoHS-compliant per Analog Devices ordering information.
Can the AD627ARZ be used as a drop-in replacement for the AD627BR-REEL7 in an existing design?
Because both parts share the same package, pinout, and function, the AD627ARZ can be placed in the same PCB location. However, it is a lower grade with wider offset voltage (250 µV vs 150 µV) and gain error (0.35% vs 0.25%) limits, so the substitution is only acceptable if the design tolerates the A-grade specifications.
Do both parts share the same operating temperature range?
Yes. Both the AD627ARZ and AD627BR-REEL7 are specified over the industrial temperature range of −40°C to +85°C, as stated in the Analog Devices AD627 datasheet for the R-grade SOIC options.