Part A
AD629BRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3376 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD629BRZ and AD629AR-REEL share the same core amplifier architecture, pinout, and supply requirements, making them functionally interchangeable in most designs. The BRZ grade offers tighter gain error and offset voltage specifications, so the AR-REEL variant can serve as a drop-in substitute where the relaxed precision tolerances remain acceptable; designs relying on the tighter B-grade accuracy should validate performance before substitution.
Package Type
High match
Pin Configuration
High match
Gain Error Grade
Validation required
Offset Voltage Grade
Validation required
Parts at a glance
Part B
AD629AR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9883 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 | AD629BRZ | AD629AR-REEL | Why it matters |
|---|---|---|---|
| Grade / Temperature Range | Industrial (-40°C to +85°C) | Industrial (-40°C to +85°C) | Both are industrial grade, but the B grade typically guarantees tighter specs than the A grade, affecting precision in critical applications. |
| Gain Error (max) | 0.05% | 0.10% | Lower gain error improves measurement accuracy; the B grade offers twice the gain accuracy of the A grade. |
| Offset Voltage (max, RTI) | 1 mV | 2 mV | Lower input offset voltage reduces DC measurement error, making the B grade preferable for high-precision sensing. |
| Offset Voltage Drift (max) | 10 µV/°C | 20 µV/°C | Lower drift maintains accuracy over temperature; the B grade is more stable across the operating range. |
| CMRR (min, G=1) | 86 dB | 77 dB | Higher common-mode rejection suppresses interference on high-voltage inputs; the B grade rejects more common-mode noise. |
| Input Bias Current (max) | 25 nA | 50 nA | Lower bias current reduces errors with high source impedances; the B grade is better suited for high-impedance sensors. |
| Supply Voltage Range | ±2.5 V to ±18 V | ±2.5 V to ±18 V | Identical supply range means both parts are interchangeable for the same power rails. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package ensures drop-in PCB compatibility between the two parts. |
| Number of Amplifiers | 1 | 1 | Both are single difference amplifiers, so channel count is identical for circuit design. |
| Fixed Gain | 1 V/V | 1 V/V | Identical unity gain means the same signal scaling applies, preserving transfer function compatibility. |
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 | AD629BRZ | AD629AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | Differential | Differential |
| Number of Circuits | 1 | 1 |
| Slew Rate | 2.1V/µs | 2.1V/µs |
| -3 dB Bandwidth | 500 kHz | 500 kHz |
| Voltage - Input Offset | 100 µV | 200 µV |
| Supply Current | 900µA | 900µA |
| Current - Output / Channel | 25 mA | 25 mA |
| Voltage - Supply Span(Min) | 5 V | 5 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 primary differences between the AD629BRZ and AD629AR-REEL?
The AD629BRZ and AD629AR-REEL are both AD629 high common-mode voltage difference amplifiers from Analog Devices, but they differ in grade and packaging. The AD629BRZ is a B-grade device in a 8-lead SOIC tube package, offering tighter gain error and offset voltage specifications. The AD629AR-REEL is an A-grade device supplied in a 7-inch reel for automated assembly, with wider gain error and offset voltage tolerances than the B-grade.
Are the AD629BRZ and AD629AR-REEL electrically interchangeable in an existing design?
They share the same functional architecture and pinout, but they are not strictly interchangeable where precision matters. The B-grade AD629BRZ has tighter gain error (typically 0.01% max vs 0.05% max for the A-grade) and lower offset voltage (typically 0.5 mV max vs 1 mV max). A design specified for the A-grade can typically accept the B-grade, but substituting an A-grade for a B-grade may violate precision requirements.
What is the common-mode voltage range of the AD629 devices?
Both the AD629BRZ and AD629AR-REEL are specified for a common-mode voltage range of ±250 V, making them suitable for high-voltage industrial and power-monitoring applications. This rating applies to both grades per the Analog Devices AD629 datasheet.
Do the AD629BRZ and AD629AR-REEL differ in operating temperature range?
No. Both the AD629BRZ and AD629AR-REEL are specified over the industrial temperature range of −40°C to +85°C. The grade suffix (A vs B) affects precision specifications, not the operating temperature range.
What package and mounting options do these two parts use?
Both devices are offered in an 8-lead SOIC package. The AD629BRZ is supplied in tube packaging (Z indicates the RoHS-compliant SOIC package), while the AD629AR-REEL is supplied on a 7-inch tape-and-reel for high-volume automated placement. The PCB land pattern is identical for both.
Which part should be selected for a high-volume production line?
The AD629AR-REEL is the appropriate choice for high-volume automated assembly because it is supplied on tape-and-reel, which is compatible with pick-and-place equipment. The AD629BRZ in tube packaging is better suited to prototyping, low-volume runs, or applications requiring the tighter B-grade precision specifications.
Are both parts RoHS compliant?
Yes. The AD629BRZ and AD629AR-REEL are both RoHS-compliant versions of the AD629. The "Z" suffix in the part numbers denotes the RoHS-compliant SOIC package per Analog Devices ordering nomenclature.