Part A
AD623AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7097 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD623BRZ-R7 and AD623AR are functionally compatible instrumentation amplifiers sharing the same core architecture, gain-setting scheme, and supply range, making the AD623BRZ-R7 a viable replacement candidate for the AD623AR in most designs. The primary distinction lies in grade and packaging: the BRZ-R7 offers tighter grade specifications and tape-and-reel packaging, while the AR is a standard-grade SOIC tube option. Designers should validate grade-dependent specifications and assembly requirements before substituting.
Amplifier Function and Gain Configuration
High match
Supply Voltage Range
High match
Package Type
High match
Grade and Accuracy Specifications
Validation required
Parts at a glance
Part B
AD623BRZ-R7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5122 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 | AD623BRZ-R7 | AD623AR | Why it matters |
|---|---|---|---|
| Grade / Temperature Range | B grade, -40°C to +85°C | A grade, -40°C to +85°C | The B grade is a higher-precision bin than the A grade, so offset and gain error specifications differ, affecting measurement accuracy in precision applications. |
| Input Offset Voltage (max) | 200 µV | 500 µV | Lower offset voltage reduces DC error at the output, which is critical for low-level signal amplification and precision instrumentation. |
| Input Offset Voltage Drift (max) | 2 µV/°C | 5 µV/°C | Lower drift maintains accuracy over temperature, important for applications operating across wide thermal ranges. |
| Input Bias Current (max) | 25 nA | 27 nA | Bias current interacts with source impedance to create offset errors; lower bias current improves accuracy with high-impedance sensors. |
| Gain Error (max, G=1) | 0.10% | 0.25% | Gain error directly affects the accuracy of the amplified signal; the B grade offers tighter gain accuracy for precision scaling. |
| CMRR (min, G=10) | 90 dB | 86 dB | Higher common-mode rejection suppresses interference and noise, improving signal fidelity in electrically noisy environments. |
| Noise (RTI, 1 kHz) | 35 nV/√Hz | 35 nV/√Hz | Input-referred noise sets the minimum detectable signal; identical noise performance means similar sensitivity limits for both grades. |
| Package / Mounting | 8-SOIC, surface mount, tape and reel | 8-SOIC, surface mount | Both use the same SOIC footprint, so they are physically interchangeable on a PCB; the R7 suffix indicates tape-and-reel packaging for automated assembly. |
| Supply Voltage Range | 2.7 V to 12 V (single supply) | 2.7 V to 12 V (single supply) | Identical supply range means both parts work in the same low-voltage systems without redesign of the power rail. |
| Operating Supply Current (max) | 575 µA | 575 µA | Matching quiescent current ensures equivalent power budget impact when substituting one grade for the other. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD623AR | AD623BRZ-R7 |
|---|---|---|
| Part Status | Obsolete | 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 AD623BRZ-R7 and the AD623AR?
The AD623BRZ-R7 is a RoHS-compliant, tape-and-reel packaged version in an 8-lead SOIC (R-8) with a specified temperature range of −40°C to +85°C, while the AD623AR is the standard 8-lead SOIC tube version. Both are instrumentation amplifiers with the same core specifications, but the BRZ-R7 suffix denotes RoHS compliance and reel packaging for automated assembly, whereas the AR suffix denotes the standard SOIC package without the reel/RoHS designation.
Are the AD623BRZ-R7 and AD623AR electrically interchangeable?
Yes, both devices share the same electrical specifications: gain set by a single external resistor (G = 1 + 100 kΩ/RG), supply range of 2.7 V to 12 V, and rail-to-rail output. The AD623BRZ-R7 and AD623AR are functionally equivalent instrumentation amplifiers; the primary differences are packaging (tape-and-reel vs. tube) and RoHS compliance status, not electrical performance.
What is the gain range and how is gain set for these amplifiers?
Both the AD623BRZ-R7 and AD623AR provide a gain range of 1 to 1000, set by a single external resistor connected between the RG pins. The gain equation is G = 1 + (100 kΩ / RG). With RG open, gain is 1; with RG = 100 Ω, gain is approximately 1001. This applies identically to both variants.
What are the supply voltage and input common-mode specifications?
Both the AD623BRZ-R7 and AD623AR operate from a single supply of 2.7 V to 12 V or dual supplies of ±2.7 V to ±6 V. The input common-mode range extends from 0.15 V below the negative rail to 1.5 V below the positive rail (at gain = 1), allowing true single-supply operation. These specifications are identical for both variants.
What is the difference in packaging and how does it affect assembly?
The AD623BRZ-R7 is supplied in tape-and-reel format (7-inch reel, 750 units per reel) in an 8-lead SOIC package, suitable for automated pick-and-place assembly. The AD623AR is supplied in standard tube packaging in the same 8-lead SOIC body. Both use the same PCB land pattern and pinout, so no layout change is required when switching between them.
Do both variants meet RoHS requirements?
The AD623BRZ-R7 is explicitly RoHS-compliant, as indicated by the "Z" in the part number. The AD623AR is the standard (non-RoHS-designated) version. For designs requiring RoHS compliance, the AD623BRZ-R7 should be selected; the AD623AR may not carry the same compliance designation and should be verified against the manufacturer's current datasheet before use in RoHS-restricted applications.
What are the offset voltage and drift specifications for these parts?
Both the AD623BRZ-R7 and AD623AR specify a maximum input offset voltage of 200 µV (at 25°C) and an input offset voltage drift of 2 µV/°C maximum. These precision specifications are common to both variants and are suitable for low-level signal amplification in industrial and instrumentation applications.
Can the AD623BRZ-R7 be used as a drop-in replacement for the AD623AR?
Yes, the AD623BRZ-R7 is a drop-in replacement for the AD623AR in terms of electrical function, pinout, and package footprint (both 8-lead SOIC). The differences are limited to packaging format (tape-and-reel vs. tube) and RoHS compliance designation. Designers should confirm the RoHS requirement and assembly method before substituting, but no circuit redesign is necessary.