Part A
AD623BRZ-R7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5122 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD623ARZ-RL and AD623BRZ-R7 are functionally interchangeable instrumentation amplifiers sharing identical pinout, package, supply range, and gain configuration, with the BRZ grade offering tighter factory-trimmed offset voltage and gain error tolerances. The ARZ-RL variant is a viable drop-in substitute where the tighter DC precision of the BRZ grade is not mandatory, though applications sensitive to offset drift and gain accuracy should validate against the relaxed specifications.
Package and Pinout
High match
Supply Voltage Range
High match
Gain Configuration
High match
DC Precision Grade
Validation required
Parts at a glance
Part B
AD623ARZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2845 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
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-R7 | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 200 µV | 100 µV | Lower offset voltage improves DC accuracy; the B grade offers tighter offset for precision measurement applications. |
| Input Offset Voltage Drift (max) | 2 µV/°C | 1 µV/°C | Lower drift maintains accuracy over temperature; the B grade is preferable for wide-temperature precision designs. |
| Input Bias Current (max) | 25 nA | 25 nA | Bias current affects error with high source impedance; both grades are similar here. |
| Gain Error (max, G=1) | 0.10% | 0.05% | Gain error directly impacts signal scaling accuracy; the B grade provides tighter gain accuracy. |
| Gain Nonlinearity (max, G=1) | 50 ppm | 25 ppm | Nonlinearity limits distortion and measurement linearity; the B grade is better for high-accuracy signal chains. |
| CMRR (min, G=10) | 90 dB | 100 dB | Higher common-mode rejection improves performance in noisy or high common-mode environments; the B grade rejects more. |
| Input Voltage Noise (1 kHz) | 35 nV/√Hz | 35 nV/√Hz | Noise floor affects resolution of small signals; both grades share the same typical noise. |
| Supply Voltage Range | 2.7 V to 12 V | 2.7 V to 12 V | Determines compatibility with single-supply and battery-powered systems; both grades are identical. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines environmental limits for the application; both grades are rated identically. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package compatibility ensures drop-in substitution on the same PCB footprint; both are identical. |
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-R7 | 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 key differences between the AD623ARZ-RL and AD623BRZ-R7?
Both are instrumentation amplifiers from Analog Devices in an 8-lead SOIC package. The primary difference is the grade: the AD623ARZ-RL is the A-grade version, while the AD623BRZ-R7 is the higher-grade B version. The B-grade offers tighter specifications, notably lower input offset voltage and lower offset voltage drift, as well as tighter gain error. The suffix differences also reflect packaging: -RL denotes tape and reel, and -R7 denotes a 7-inch reel.
Are the AD623ARZ-RL and AD623BRZ-R7 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. This allows a board designed for one grade to accept the other without layout changes.
How do the offset voltage specifications compare between the A and B grades?
The AD623BRZ-R7 (B-grade) has a lower maximum input offset voltage than the AD623ARZ-RL (A-grade). The B-grade is specified with tighter offset voltage limits, making it preferable for precision applications where DC accuracy is critical. Designers should consult the official Analog Devices AD623 datasheet for the exact maximum offset voltage values for each grade.
Do both parts share the same gain-setting configuration?
Yes. Both the AD623ARZ-RL and AD623BRZ-R7 use the same single external resistor between the RG pins to set gain, following the same gain equation. The gain range and configuration method are identical across grades; only the specified accuracy tolerances differ.
Can the AD623ARZ-RL be substituted with the AD623BRZ-R7 in an existing design?
Because they are pin-compatible and functionally identical, the AD623BRZ-R7 can generally be used where the AD623ARZ-RL was specified, and it offers improved precision. However, substitution should be validated against the target design's accuracy, drift, and cost requirements using the manufacturer datasheet before production release.
What does the -RL and -R7 suffix indicate on these part numbers?
The suffixes indicate the shipping packaging. The -RL suffix on the AD623ARZ-RL denotes tape-and-reel packaging, and the -R7 suffix on the AD623BRZ-R7 denotes a 7-inch reel. Both are intended for automated surface-mount assembly; the reel size and quantity per reel differ and should be confirmed from the manufacturer's ordering guide.
Are both grades specified over the same operating temperature range?
Yes. Both the AD623ARZ-RL and AD623BRZ-R7 are specified over the industrial temperature range of -40°C to +85°C, consistent with the AD623 family. The difference between grades lies in the guaranteed electrical limits, not the operating temperature range.