Part A
AD8418BRMZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5224 PCS
- Package
- MSOP-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8418ABRMZ and AD8418BRMZ-RL are functionally interchangeable current-sense amplifiers sharing the same core architecture, gain, and package footprint, making the AD8418ABRMZ a viable replacement candidate for the AD8418BRMZ-RL where the tighter grade specification is acceptable. Designers should confirm grade-dependent specifications and inventory form before committing to substitution in production.
Amplifier Function and Gain
High match
Package and Pinout
High match
Supply Voltage Range
High match
Grade and Ordering Form
Validation required
Parts at a glance
Part B
AD8418ABRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5876 PCS
- Package
- MSOP-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 | AD8418ABRMZ | AD8418BRMZ-RL | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures consistent quality, documentation, and support. |
| Amplifier Type | Current Sense Amplifier | Current Sense Amplifier | Both are current sense amplifiers, so they serve the same functional role in a circuit. |
| Number of Circuits | 1 | 1 | Single-channel configuration must match for direct substitution. |
| Package / Case | 8-Lead MSOP (RM-8) | 8-Lead MSOP (RM-8) | Identical package ensures the part fits the same PCB footprint. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting style is required for board compatibility. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply range ensures operation in the same system power domain. |
| Gain | 20 V/V | 20 V/V | Fixed gain must match to preserve signal scaling and measurement accuracy. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Same temperature range ensures reliability across the same environmental conditions. |
| Packaging / Ordering Suffix | Tube / Tray (RMZ) | Tape & Reel (RMZ-RL) | Different packaging affects assembly line handling and inventory format, though the die is functionally equivalent. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8418BRMZ-RL | AD8418ABRMZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Current Sense | Current Sense |
| Number of Circuits | 1 | 1 |
| Slew Rate | 1V/µs | 1V/µs |
| -3 dB Bandwidth | 250 kHz | 250 kHz |
| Current - Input Bias | 130 µA | 130 µA |
| Voltage - Input Offset | 200 µV | - |
| Supply Current | 2.6mA | 4.1mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8418ABRMZ and AD8418BRMZ-RL?
Both devices are current-sense amplifiers from Analog Devices in an 8-lead MSOP package. The AD8418ABRMZ is supplied in tube packaging, while the AD8418BRMZ-RL is supplied in tape-and-reel packaging (RL suffix). The "A" and "B" grade designations refer to different performance grades; the A-grade version typically offers tighter gain error and offset specifications than the B-grade. Designers should confirm the exact grade specifications in the respective Analog Devices datasheets before substitution.
Are the AD8418ABRMZ and AD8418BRMZ-RL functionally interchangeable?
Both are AD8418 current-sense amplifiers with the same pinout and MSOP-8 footprint, so they are functionally similar. However, because the A and B grades differ in specified accuracy parameters (such as gain error and input offset voltage), a direct swap should only be made after verifying that the B-grade specifications meet the application's accuracy requirements.
What is the difference between the RMZ and RMZ-RL suffixes?
The "RMZ" suffix indicates an 8-lead MSOP package in tube form. The "-RL" suffix indicates the same package supplied on tape and reel for automated pick-and-place assembly. The electrical performance of the device is not changed by the packaging suffix; only the shipping format differs.
Do both parts share the same package and pinout?
Yes. Both the AD8418ABRMZ and AD8418BRMZ-RL are offered in the same 8-lead MSOP (RM) package with an identical pin configuration, so PCB land patterns and layout are compatible between the two orderable part numbers.
Which part should be selected for high-volume automated assembly?
The AD8418BRMZ-RL is the tape-and-reel option, making it better suited for high-volume automated pick-and-place production lines. The AD8418ABRMZ in tube packaging is typically used for prototyping, low-volume runs, or manual assembly.
Can the AD8418BRMZ-RL be used as a drop-in replacement for the AD8418ABRMZ?
Because both share the same package and pinout, the B-grade tape-and-reel part can physically drop into a board designed for the A-grade part. However, the designer must confirm that the B-grade's gain error, offset, and other specified parameters satisfy the circuit's accuracy budget before approving the substitution.
Where can the verified specifications for these parts be obtained?
Authoritative parameters, including gain error, input offset voltage, common-mode range, and packaging details, are published in the official Analog Devices AD8418 datasheet and in distributor listings such as DigiKey and Mouser. Always consult the manufacturer datasheet for the specific grade before finalizing a design.