Part A
AD623ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4377 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD623ARZ and AD623AR-REEL are functionally equivalent implementations of the same instrumentation amplifier, differing only in packaging format. Both parts share identical electrical specifications, package type, and temperature range, making them interchangeable for design and qualification purposes. The AD623AR-REEL is simply the tape-and-reel delivery variant of the same device, suitable for automated assembly lines, while the AD623ARZ is supplied in tube format. Either part can be used as a direct substitute for the other without any circuit redesign or performance impact.
Package Type
High match
Electrical Specifications
High match
Operating Temperature Range
High match
Supply Voltage Range
High match
Parts at a glance
Part B
AD623AR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2974 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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 | AD623AR-REEL | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures identical design, process, and quality standards. |
| Amplifier Type | Instrumentation Amplifier | Instrumentation Amplifier | Confirms both parts serve the same signal-conditioning function. |
| Number of Channels | 1 | 1 | Channel count must match for circuit compatibility. |
| Package / Case | 8-SOIC | 8-SOIC | Same package footprint allows drop-in PCB replacement. |
| Mounting Type | Surface Mount | Surface Mount | Mounting style must match the assembly process and board design. |
| Supply Voltage Range | 2.7 V to 12 V (single supply) | 2.7 V to 12 V (single supply) | Operating voltage range determines compatibility with the system power rail. |
| Gain Range | 1 to 1000 (set by external resistor) | 1 to 1000 (set by external resistor) | Gain configurability must match to preserve signal scaling behavior. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment for reliable operation. |
| Packaging / Delivery Form | Tube | Tape & Reel | Packaging form affects handling and suitability for automated pick-and-place assembly lines. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD623ARZ | AD623AR-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 is the difference between AD623ARZ and AD623AR-REEL?
Both parts are the same AD623 instrumentation amplifier die in an 8-lead SOIC package (R-8 suffix) and are specified over the industrial temperature range. The difference is packaging format: AD623ARZ is supplied in tube/tray quantities, while AD623AR-REEL is supplied on tape-and-reel for automated assembly. The "Z" suffix on AD623ARZ denotes RoHS-compliant lead finish per Analog Devices nomenclature; designers should confirm the reel variant's ordering code and RoHS status on the manufacturer datasheet before release.
Are AD623ARZ and AD623AR-REEL electrically and functionally identical?
Yes. Both are the AD623 single-supply instrumentation amplifier with the same gain equation (G = 1 + 100 kΩ/RG), the same rail-to-rail output, and the same specified supply range of 2.7 V to 12 V (single supply) or ±2.5 V to ±6 V (dual supply). Package, pinout, and electrical specifications are the same; only the delivery format differs.
Can AD623ARZ and AD623AR-REEL be used interchangeably in a design?
Yes, from an electrical and footprint standpoint they are interchangeable because both use the same 8-lead SOIC (R-8) package and pinout. The choice between them is a manufacturing/logistics decision: use AD623AR-REEL for pick-and-place reel-fed assembly lines and AD623ARZ for tube-fed or low-volume/prototype builds.
What is the gain-setting resistor requirement for these parts?
Gain is set by a single external resistor RG connected between the RG pins, using G = 1 + 100 kΩ/RG. With RG open, the device operates at unity gain (G = 1). For G = 2, RG = 100 kΩ; for G = 10, RG ≈ 11.1 kΩ; for G = 100, RG ≈ 1.01 kΩ; for G = 1000, RG ≈ 100 Ω. Values should be verified against the AD623 datasheet gain table for the target gain and tolerance.
What supply voltage range do AD623ARZ and AD623AR-REEL support?
Both parts operate from a single supply of 2.7 V to 12 V, or from dual supplies of ±2.5 V to ±6 V. The rail-to-rail output stage allows the output to swing close to both supply rails, which suits low-voltage single-supply signal conditioning.
Do AD623ARZ and AD623AR-REEL require external input protection or filtering?
The AD623 input structure is designed to tolerate overload conditions, but in applications where inputs can exceed the supply rails or where EMI/RFI is present, external series resistors and differential/common-mode filtering are commonly added per the datasheet's input protection and filtering guidance. The need for such networks depends on the application environment and should be evaluated against the datasheet's absolute maximum ratings.
Which package and pinout do AD623ARZ and AD623AR-REEL use?
Both are offered in the 8-lead SOIC (R-8) package with the standard AD623 pinout: -IN, +IN, RG, RG, REF, OUTPUT, +VS, and -VS. Because the package and pinout are identical, PCB land patterns and layout are the same for both ordering variants.
How should the REF pin be handled on AD623ARZ and AD623AR-REEL?
The REF pin sets the output reference level. For a single-supply design, REF is typically driven to mid-supply (for example, by a low-impedance divider or reference) to center the output swing; for dual-supply designs, REF is usually tied to ground. REF should be driven from a low-impedance source to preserve common-mode rejection and output accuracy, as described in the AD623 datasheet.