Part A
AD629ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6804 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD629BR-REEL7 is a higher-grade variant of the AD629ARZ, offering tighter gain error and offset voltage specifications within the same SOIC-8 footprint and identical pinout. Both parts share the same supply range, input common-mode voltage capability, and fixed gain of 1, making the BR grade a valid functional upgrade for the AR grade in precision current-sense and high-voltage difference-amplifier applications, provided the tighter tolerances are acceptable and the reel packaging suits the assembly process.
Package and Pinout
High match
Gain and Transfer Function
High match
Supply Voltage Range
High match
Grade and Accuracy Specifications
Validation required
Parts at a glance
Part B
AD629BR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8560 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 | AD629ARZ | AD629BR-REEL7 | Why it matters |
|---|---|---|---|
| Grade / Accuracy Class | A grade | B grade | The B grade offers tighter guaranteed specifications, which directly affects measurement precision in precision current-sensing applications. |
| Input Offset Voltage (max) | 1 mV | 0.5 mV | Lower offset voltage reduces DC error at the output, improving accuracy for low-level differential signal measurement. |
| Input Offset Voltage Drift (max) | 20 µV/°C | 10 µV/°C | Lower drift maintains accuracy over temperature, critical for industrial and automotive environments. |
| Gain Error (max) | 0.05% | 0.02% | Gain error determines scaling accuracy of the differential amplifier; tighter gain error improves overall system measurement fidelity. |
| Common-Mode Rejection Ratio (min) | 77 dB | 86 dB | Higher CMRR rejects high common-mode voltages, essential when sensing current in the presence of large bus voltages. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +125°C | The wider temperature range of the B grade supports use in harsher environments and higher-power applications. |
| Supply Voltage Range | ±2.5 V to ±18 V | ±2.5 V to ±18 V | Identical supply range means both parts are interchangeable for power-supply design considerations. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package ensures footprint and assembly compatibility between the two parts. |
| Number of Amplifiers | 1 | 1 | Single-channel configuration confirms functional equivalence for single differential sensing channels. |
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 | AD629ARZ | AD629BR-REEL7 |
|---|---|---|
| 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 | 200 µV | 100 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 key differences between the AD629ARZ and AD629BR-REEL7?
Both are AD629 high common-mode voltage difference amplifiers from Analog Devices in an 8-lead SOIC package. The AD629ARZ is the A-grade version with a specified gain error of ±0.05% max and offset voltage of ±1 mV max, while the AD629BR-REEL7 is the B-grade version with tighter gain error of ±0.02% max and offset voltage of ±0.5 mV max. The BR-REEL7 is supplied in tape-and-reel packaging for automated assembly, whereas the ARZ is typically supplied in tube packaging.
Are the AD629ARZ and AD629BR-REEL7 pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with identical pin functions, so they are pin-compatible and share the same PCB land pattern.
Can the AD629ARZ be used as a drop-in replacement for the AD629BR-REEL7?
Electrically they are pin-compatible, but the B-grade offers tighter gain error and offset voltage specifications than the A-grade. Substitution is acceptable only if the application's accuracy budget is met by the A-grade limits; otherwise the B-grade should be retained.
What is the common-mode voltage range of these AD629 devices?
The AD629 is designed to handle common-mode voltages up to ±250 V with a supply of ±15 V, making it suitable for high-voltage current-sense and industrial measurement applications.
What is the difference in packaging between the AD629ARZ and AD629BR-REEL7?
The AD629ARZ is supplied in standard tube packaging, while the AD629BR-REEL7 is supplied in tape-and-reel format (7-inch reel) intended for high-volume automated pick-and-place assembly.
Do both parts share the same operating temperature range?
Yes. Both the AD629ARZ and AD629BR-REEL7 are specified over the industrial temperature range of −40°C to +85°C.
What is the fixed gain of the AD629ARZ and AD629BR-REEL7?
Both devices are fixed-gain difference amplifiers with a gain of 1 V/V, allowing direct measurement of differential signals riding on high common-mode voltages.