Part A
AD623AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7097 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD623ARZ-RL and AD623AR are functionally equivalent instrumentation amplifiers sharing identical core specifications, with the RL suffix denoting tape-and-reel packaging versus the tube packaging of the base AD623AR. Both parts are drop-in interchangeable for design purposes, and the choice between them should be driven solely by assembly and procurement packaging requirements.
Amplifier Type and Function
High match
Package Type
High match
Electrical Specifications
High match
Packaging and Ordering Format
Validation required
Parts at a glance
Part B
AD623ARZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2845 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
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 | AD623AR | Why it matters |
|---|---|---|---|
| Amplifier Type | Instrumentation Amplifier | Instrumentation Amplifier | Confirms both parts serve the same core function, enabling direct functional substitution. |
| Number of Channels | 1 | 1 | Single-channel configuration must match for the parts to be interchangeable in a given circuit. |
| 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 flexibility affects whether the part suits the required signal amplification level. |
| Input Offset Voltage (max) | 200 µV | 200 µV | Offset voltage impacts DC accuracy and measurement precision in the application. |
| Gain Bandwidth Product | 800 kHz | 800 kHz | Bandwidth limits the frequency range over which the amplifier maintains useful gain. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the target environment for reliable operation. |
| Package / Mounting | 8-SOIC (Surface Mount) | 8-SOIC (Surface Mount) | Package and mounting style must match for PCB footprint compatibility. |
| Packaging / Delivery Form | Tape & Reel (RL) | Tube / Bulk | Delivery form affects assembly line handling and inventory; the electrical part is otherwise 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 | AD623AR | AD623ARZ-RL |
|---|---|---|
| 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 is the difference between AD623ARZ-RL and AD623AR?
Both are the same AD623 instrumentation amplifier die in an 8-lead SOIC package (R suffix). The difference is packaging format: AD623AR is supplied in standard tube/tray quantities, while AD623ARZ-RL is the RoHS-compliant (Z) version supplied in tape-and-reel format for automated assembly. Electrical specifications are identical.
Are AD623ARZ-RL and AD623AR electrically interchangeable?
Yes. Both devices share the same datasheet specifications for gain range (1 to 1000, set by a single external resistor), supply range (±2.5 V to ±6 V dual, or 3 V to 12 V single supply), and offset voltage. The only distinction is the RoHS compliance suffix (Z) and the reel packaging of the -RL variant.
Does the "Z" suffix on AD623ARZ-RL indicate a different silicon revision?
No. The Z suffix denotes RoHS compliance (lead-free, halogen-free molding compound) per Analog Devices part numbering. It does not indicate a different die, gain error, or performance grade compared with the non-Z AD623AR.
What does the -RL suffix mean on AD623ARZ-RL?
The -RL suffix designates tape-and-reel packaging, typically 2,500 units per 13-inch reel, intended for high-volume pick-and-place assembly. AD623AR is normally supplied in tubes. The reel quantity should be confirmed against the current Analog Devices datasheet or distributor listing.
Can AD623ARZ-RL be used as a drop-in replacement for AD623AR on an existing PCB?
Yes, provided the board is designed for the 8-lead SOIC (R) footprint. Both parts share the same package outline, pinout (gain resistor pins 1 and 8, -IN pin 2, +IN pin 3, V- pin 4, REF pin 5, VOUT pin 6, V+ pin 7), and electrical ratings, so no layout change is required.
Do both parts meet the same temperature and supply specifications?
Yes. Both are specified over the -40 °C to +85 °C industrial temperature range and operate from single supplies of 3 V to 12 V or dual supplies of ±2.5 V to ±6 V, with the same gain equation G = 1 + (100 kΩ / RG) and the same CMRR and bandwidth characteristics per the AD623 datasheet.
Which variant should be selected for RoHS-restricted production?
AD623ARZ-RL should be selected because the Z suffix confirms RoHS compliance. The non-Z AD623AR may not satisfy RoHS-restricted manufacturing requirements; verify the specific ordering code and compliance documentation from Analog Devices or an authorized distributor before use.