Part A
AD623ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4377 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD623BR-REEL is a functionally compatible replacement candidate for the AD623ARZ, sharing the same instrumentation amplifier architecture, pinout, and supply range, with the BR grade offering tighter gain error and offset specifications. Validation of gain-setting resistor tolerance and drift behavior is recommended for precision applications.
Package Type
High match
Pin Configuration
High match
Supply Voltage Range
High match
Gain Error and Offset Grade
Validation required
Parts at a glance
Part B
AD623BR-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3484 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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 | AD623BR-REEL | Why it matters |
|---|---|---|---|
| Grade / Gain Error | A grade (higher gain error) | B grade (lower gain error) | The B grade offers tighter gain accuracy, which directly affects measurement precision in instrumentation amplifier circuits. |
| Gain Error (G=1) | 0.10% max | 0.05% max | Lower gain error means the output more accurately reflects the amplified input signal, critical for precision sensing. |
| Input Offset Voltage | 200 µV max | 100 µV max | Lower offset voltage reduces DC error at the output, improving accuracy for low-level signal amplification. |
| Input Offset Voltage Drift | 2 µV/°C max | 1 µV/°C max | Lower drift maintains accuracy over temperature, important for stable performance in varying environments. |
| Input Bias Current | 25 nA max | 25 nA max | Bias current affects error when driven from high-impedance sources; both grades share the same limit here. |
| CMRR (G=10) | 90 dB min | 100 dB min | Higher common-mode rejection suppresses unwanted common-mode noise, improving signal fidelity in noisy environments. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Both parts support industrial temperature ranges, so thermal envelope is not a differentiator. |
| Package / Mounting | 8-SOIC (surface mount) | 8-SOIC (surface mount, tape & reel) | Same footprint allows drop-in substitution; the reel packaging affects assembly handling, not electrical function. |
| Supply Voltage Range | 2.7 V to 12 V (single) / ±2.5 V to ±6 V (dual) | 2.7 V to 12 V (single) / ±2.5 V to ±6 V (dual) | Identical supply flexibility means both parts suit the same power architectures. |
| Supply Current | 575 µA typ | 575 µA typ | Equal quiescent current means no power budget difference between the two grades. |
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 | AD623ARZ | AD623BR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | 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 AD623ARZ and AD623BR-REEL?
Both are instrumentation amplifiers from Analog Devices in an 8-lead SOIC package. The primary difference is the grade: the AD623ARZ is the A-grade version, while the AD623BR-REEL is the higher-grade B version supplied in reel packaging. The B-grade offers tighter specifications, including lower offset voltage, lower offset voltage drift, and higher gain accuracy compared to the A-grade.
Are the AD623ARZ 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.
What is the supply voltage range for these instrumentation amplifiers?
Both the AD623ARZ and AD623BR-REEL operate from a single supply of 3 V to 12 V, or from dual supplies of ±2.5 V to ±6 V, as specified in the Analog Devices AD623 datasheet.
How is the gain set on the AD623ARZ and AD623BR-REEL?
Gain is programmed with a single external resistor connected between the RG pins (pins 1 and 8). The gain follows the datasheet relationship G = 1 + (100 kΩ / RG), allowing gains from 1 to 1000.
Do the AD623ARZ and AD623BR-REEL differ in offset voltage specifications?
Yes. The B-grade (AD623BR-REEL) has tighter offset voltage and offset voltage drift specifications than the A-grade (AD623ARZ). Designers should consult the respective Analog Devices datasheet grade tables for the exact limits before selecting a grade for precision applications.
What packaging difference exists between the AD623ARZ and AD623BR-REEL?
The AD623ARZ is supplied in tube packaging, while the AD623BR-REEL is supplied in tape-and-reel packaging intended for automated assembly. Both use the same 8-lead SOIC body.
Can the AD623ARZ be used as a drop-in replacement for the AD623BR-REEL?
Because they are pin-compatible and functionally identical, the AD623ARZ can replace the AD623BR-REEL in many circuits, but the relaxed A-grade offset and drift specifications must be validated against the design's accuracy requirements before substitution.