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 AD623BR-REEL is a functionally compatible upgrade candidate for the AD623AR, sharing the same instrumentation amplifier architecture, pinout, and supply range, while offering tighter grade specifications. Designers should confirm gain-setting resistor tolerance and input 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
AD623BR-REEL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3484 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 | AD623AR | AD623BR-REEL | Why it matters |
|---|---|---|---|
| Grade / Accuracy Class | A grade | B grade | The B grade offers tighter guaranteed specifications (offset, gain error, CMRR), affecting precision in instrumentation applications. |
| Input Offset Voltage (max) | 200 µV | 100 µV | Lower offset voltage reduces DC error at the output, critical for low-level signal amplification. |
| Input Offset Voltage Drift (max) | 2 µV/°C | 1 µV/°C | Lower drift maintains accuracy over temperature, important for precision measurement across operating ranges. |
| Gain Error (max) | 0.35% | 0.10% | Tighter gain error improves absolute gain accuracy, reducing calibration needs in signal-conditioning circuits. |
| CMRR (min, G=100) | 90 dB | 100 dB | Higher common-mode rejection suppresses interference, improving performance in noisy or high common-mode environments. |
| Input Noise (RTI, 1 kHz) | 35 nV/√Hz | 35 nV/√Hz | Noise floor affects resolution of small signals; identical here, so noise performance is equivalent between grades. |
| Supply Voltage Range | 2.7 V to 12 V | 2.7 V to 12 V | Wide single/dual supply compatibility enables use in battery and industrial systems; identical for both parts. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines environmental limits for reliable operation; identical, so both suit the same temperature environments. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Same footprint allows drop-in substitution; the reel packaging affects assembly handling rather than electrical function. |
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 | AD623AR | AD623BR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Obsolete |
| 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 AD623AR and AD623BR-REEL?
Both are AD623 instrumentation amplifiers in an 8-lead SOIC package. The primary difference is the grade: the AD623AR is the standard grade with specified offset voltage and gain error limits, while the AD623BR is the higher-grade version with tighter offset voltage, offset drift, and gain error specifications. The "-REEL" suffix on AD623BR-REEL indicates tape-and-reel packaging for automated assembly.
Are the AD623AR and AD623BR-REEL 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 AD623AR be replaced directly by the AD623BR-REEL in an existing design?
In most cases yes, because the pinout and package are identical and the BR grade offers equal or tighter specifications. However, the designer should verify that the tighter grade specifications and the tape-and-reel packaging format are acceptable for the assembly process and the application requirements.
How is the gain set on the AD623AR and AD623BR-REEL?
Gain is programmed with a single external resistor connected between the RG pins (pins 1 and 8). The gain equation is G = 1 + (100 kΩ / RG), so the same resistor value produces the same gain on both grades.
What supply voltage range do the AD623AR and AD623BR-REEL support?
Both devices operate from a single supply of 2.7 V to 12 V or from dual supplies of ±2.7 V to ±6 V, making them suitable for low-voltage and battery-powered signal conditioning.
Do the AD623AR and AD623BR-REEL differ in offset voltage specifications?
Yes. The AD623BR grade is specified with tighter input offset voltage and offset voltage drift limits than the AD623AR grade. Designers should consult the respective manufacturer datasheet grade tables for the exact limits applicable to each orderable part number.
Why is the AD623BR-REEL supplied in tape-and-reel form?
The "-REEL" suffix denotes tape-and-reel packaging, which is intended for high-volume automated pick-and-place assembly lines. The AD623AR is typically supplied in standard tube or tray packaging, so the packaging format is a practical difference for production planning.
Are the AD623AR and AD623BR-REEL suitable for the same temperature range?
Both grades are specified for the industrial temperature range of −40°C to +85°C. The BR grade maintains tighter performance limits over that range, which can matter in precision instrumentation applications.