Part A
AD623BRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6859 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD623BRZ is a functionally compatible upgrade candidate for the AD623ARZ-RL, sharing the same instrumentation amplifier architecture, package, and pinout while offering tighter grade specifications. Designers should validate gain-setting resistor tolerance and offset performance against their application requirements before substituting.
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
AD623ARZ-RL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2845 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, 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 | AD623ARZ-RL | AD623BRZ | Why it matters |
|---|---|---|---|
| Grade / Accuracy Class | A grade | B grade | The B grade offers tighter guaranteed specifications (offset, gain error, CMRR), which directly affects measurement precision in instrumentation applications. |
| Input Offset Voltage (max) | 200 µV | 100 µV | Lower maximum input offset voltage reduces DC error at the output, improving accuracy for low-level signal amplification. |
| Input Offset Voltage Drift (max) | 2 µV/°C | 1 µV/°C | Lower drift ensures stable performance over temperature, critical for precision instrumentation across the operating range. |
| Gain Error (max, G=1) | 0.35% | 0.10% | Tighter gain error improves the accuracy of the amplified signal, reducing calibration burden in gain-critical designs. |
| CMRR (min, G=10) | 90 dB | 100 dB | Higher common-mode rejection suppresses interference and noise, improving signal integrity in noisy environments. |
| Input Noise Voltage (1 kHz) | 35 nV/√Hz | 35 nV/√Hz | Noise density affects the minimum resolvable signal; identical values mean equivalent noise performance between grades. |
| Supply Voltage Range | 2.7 V to 12 V | 2.7 V to 12 V | Wide single-supply operation enables use in battery-powered and low-voltage systems; identical range means equivalent supply flexibility. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range suitability is identical, so both parts fit the same environmental conditions. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package ensures drop-in footprint compatibility for PCB layout and assembly. |
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 | AD623BRZ | AD623ARZ-RL |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.3V/µs | 0.3V/µs |
| -3 dB Bandwidth | 800 kHz | 800 kHz |
| Current - Input Bias | 17 nA | 17 nA |
| Voltage - Input Offset | 25 µV | 25 µV |
| Supply Current | 375µA | 375µA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 12 V | 12 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 AD623ARZ-RL and AD623BRZ?
Both are instrumentation amplifiers in the same 8-lead SOIC package and share the same functional architecture, but they differ in grade. The AD623ARZ-RL is the A-grade version supplied in tape-and-reel packaging (RL), while the AD623BRZ is the higher-grade B version supplied in tube form. The B grade offers tighter specifications, notably lower input offset voltage and offset drift, than the A grade.
How do the offset voltage specifications compare between the AD623ARZ-RL and AD623BRZ?
Per the Analog Devices datasheet, the AD623B grade has a lower maximum input offset voltage than the AD623A grade. The A grade is specified with a higher maximum offset voltage, while the B grade is binned to a tighter limit. Designers requiring lower DC error should select the B grade; exact limits should be confirmed against the current datasheet revision.
Are the AD623ARZ-RL and AD623BRZ pin-compatible and package-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. The suffix difference (ARZ vs BRZ) denotes grade and packaging, not package outline.
What does the "-RL" suffix on the AD623ARZ-RL indicate?
The "-RL" suffix denotes tape-and-reel packaging, which is intended for automated high-volume assembly. The AD623BRZ, without an RL suffix, is typically supplied in tube packaging. The electrical grade is indicated by the A or B letter, not by the packaging suffix.
Can the AD623ARZ-RL be used as a drop-in replacement for the AD623BRZ?
Because both share the same package and pinout, they are physically interchangeable. However, substituting the A grade for the B grade may degrade offset voltage and offset drift performance. The substitution should only be made after verifying that the A-grade specifications meet the application's error budget.
Do both the AD623ARZ-RL and AD623BRZ support single-supply and dual-supply operation?
Yes. Both grades of the AD623 are designed for single-supply operation (as low as 3 V) as well as dual-supply operation, with rail-to-rail output swing. The supply range and gain-setting configuration via a single external resistor are common to both grades.
Which grade should be selected for precision low-drift applications?
For precision applications requiring tighter offset and drift performance, the AD623BRZ (B grade) is the appropriate choice because it is binned to tighter specifications than the AD623ARZ-RL (A grade). The A grade is suitable where the wider offset limits are acceptable.