Part A
AD8422ARMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4335 PCS
- Package
- MSOP-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8422ARMZ and AD8422ARMZ-RL are functionally identical, sharing the same core amplifier design, package, and electrical specifications. The only distinction is the packaging format, with the -RL suffix denoting a tape-and-reel shipment option. This makes them fully interchangeable for design and production purposes, provided the reel packaging aligns with the assembly process requirements.
Package Type
High match
Electrical Specifications
High match
Operating Temperature Range
High match
Packaging Format
Validation required
Parts at a glance
Part B
AD8422ARMZ-RL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9502 PCS
- Package
- TSSOP-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 | AD8422ARMZ | AD8422ARMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Instrumentation Amplifier | Instrumentation Amplifier | Confirms both parts are the same functional device type, ensuring circuit topology compatibility. |
| Number of Channels | 1 | 1 | Single-channel configuration must match for direct board-level substitution. |
| Package / Case | 8-Lead MSOP (RM-8) | 8-Lead MSOP (RM-8) | Identical package footprint ensures the part can be dropped into the same PCB land pattern. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must match to be compatible with the existing manufacturing process. |
| Supply Voltage Range | 4.6 V to 36 V (±2.3 V to ±18 V) | 4.6 V to 36 V (±2.3 V to ±18 V) | Operating voltage window must be compatible with the system power rails for correct operation. |
| Gain Range | 1 to 1000 (set by external resistor) | 1 to 1000 (set by external resistor) | Available gain range determines whether the part meets the signal-conditioning requirements of the design. |
| Input Offset Voltage (max) | ±70 µV (typical grade) | ±70 µV (typical grade) | Offset voltage affects DC accuracy; matching values preserve measurement precision. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment for reliable operation. |
| Packaging / Ordering Format | Tube | Tape & Reel | Packaging format affects assembly line handling; the -RL reel variant suits automated high-volume pick-and-place, while the tube variant suits low-volume or prototyping. |
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 | AD8422ARMZ | AD8422ARMZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.8V/µs | 0.8V/µs |
| -3 dB Bandwidth | 2.2 MHz | 2.2 MHz |
| Current - Input Bias | 500 pA | 500 pA |
| Voltage - Input Offset | 70 µV | 70 µV |
| Supply Current | 300µA | 300µA |
| Current - Output / Channel | 20 mA | 20 mA |
| Voltage - Supply Span(Min) | 4.6 V | 4.6 V |
| Voltage - Supply Span(Max) | 36 V | 36 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 AD8422ARMZ and AD8422ARMZ-RL?
Both are the same AD8422 precision instrumentation amplifier in an 8-lead MSOP (RM) package. The suffix difference is packaging format: AD8422ARMZ is the standard tube/rail packaging, while AD8422ARMZ-RL is the tape-and-reel packaging option. The electrical specifications and die are identical; only the shipping/packaging format differs.
Are AD8422ARMZ and AD8422ARMZ-RL electrically identical?
Yes. Both part numbers refer to the same AD8422ARMZ die and package. The "-RL" suffix denotes tape-and-reel packaging, not a different silicon revision or grade. Datasheet electrical characteristics apply equally to both ordering codes.
What package do AD8422ARMZ and AD8422ARMZ-RL use?
Both are supplied in the 8-lead MSOP package, indicated by the "RM" code in the part number. The "Z" suffix indicates RoHS-compliant lead finish per Analog Devices ordering conventions.
Can AD8422ARMZ and AD8422ARMZ-RL be used interchangeably in a design?
Yes, from an electrical and footprint standpoint they are interchangeable because they share the same die and 8-lead MSOP package. The choice between them is driven by assembly/production requirements (tube vs. tape-and-reel handling), not by performance differences.
Which part number should be selected for automated SMT assembly?
AD8422ARMZ-RL is the tape-and-reel option, which is typically preferred for automated surface-mount pick-and-place assembly. AD8422ARMZ in tube/rail packaging is generally used for prototyping, low-volume, or manual handling. Selection should follow the assembly line's feeder and packaging requirements.
Do AD8422ARMZ and AD8422ARMZ-RL share the same datasheet specifications?
Yes. Analog Devices publishes a single datasheet for the AD8422 family covering the ARMZ package. Gain, bandwidth, CMRR, offset voltage, noise, and supply range specifications apply to both ordering codes since they are the same device in the same package.
Is the AD8422ARMZ-RL RoHS compliant like the AD8422ARMZ?
Yes. The "Z" designator in both part numbers denotes RoHS-compliant packaging and lead finish per Analog Devices ordering nomenclature. Both ordering codes carry the same compliance designation.