Part A
AD8418ABRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5876 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8418ABRMZ and AD8417WHRMZ-RL are both bidirectional current-sense amplifiers in the same 8-lead MSOP package with matched gain and supply requirements, making them strong functional replacement candidates. The AD8417WHRMZ-RL is the AEC-Q100 qualified variant, so the primary differentiator is automotive qualification and specified temperature range rather than core electrical function. Designers should validate the extended temperature range and qualification requirements against their application before substituting.
Amplifier Function and Gain
High match
Package and Pinout
High match
Supply Voltage Range
High match
Temperature Range and Qualification
Validation required
Parts at a glance
Part B
AD8417WHRMZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7450 PCS
- Package
- TSSOP-8
- Series
- Linear - Amplificadores - Instrumentação, 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 | AD8418ABRMZ | AD8417WHRMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Current Sense Amplifier | Current Sense Amplifier | Both are current sense amplifiers, so the core function is the same; this confirms functional substitutability at the category level. |
| Number of Channels | 1 | 1 | Single-channel configuration must match for a direct drop-in replacement in single-channel sensing designs. |
| Gain | 20 V/V | 20 V/V | Fixed gain determines the output scaling relative to the sensed current; identical gain preserves the transfer function. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching supply range ensures the part operates correctly in the same system power rail without redesign. |
| Input Offset Voltage (max) | ±200 µV | ±200 µV | Offset voltage directly affects measurement accuracy at low currents; equal offset keeps accuracy performance consistent. |
| Common-Mode Input Range | -2 V to +70 V | -2 V to +70 V | Wide common-mode range enables high-side sensing; identical range supports the same application topologies. |
| Bandwidth | 250 kHz | 250 kHz | Bandwidth governs the maximum signal frequency the amplifier can accurately track; equal bandwidth preserves dynamic response. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Temperature range must cover the target environment; matching ratings allow use in the same thermal conditions. |
| Package / Mounting | 8-Lead MSOP, Surface Mount | 8-Lead MSOP, Surface Mount | Identical package and mounting allow physical drop-in replacement on the same PCB footprint. |
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 | AD8418ABRMZ | AD8417WHRMZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | - | Automotive |
| 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 | 4.1mA | 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 ~ 150°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8418ABRMZ and the AD8417WHRMZ-RL?
The AD8418ABRMZ is a bidirectional current-sense amplifier with a gain of 20 V/V, specified over the −40°C to +125°C industrial temperature range, and supplied in an 8-lead MSOP package. The AD8417WHRMZ-RL is a bidirectional current-sense amplifier with a gain of 60 V/V, qualified to the automotive AEC-Q100 standard, specified over the −40°C to +125°C temperature range, and supplied in an 8-lead MSOP package in tape-and-reel format. The primary differences are fixed gain (20 V/V vs 60 V/V) and automotive qualification (the W suffix denotes AEC-Q100 qualification).
Are the AD8418ABRMZ and AD8417WHRMZ-RL pin-compatible?
Both devices are offered in the same 8-lead MSOP package, and their pin functions (supply, ground, reference, output, and differential inputs) are arranged identically per the respective manufacturer datasheets. However, because the gain differs (20 V/V vs 60 V/V), a direct drop-in replacement is not functionally equivalent and the system gain budget must be re-evaluated.
What is the gain of each device?
The AD8418ABRMZ has a fixed gain of 20 V/V. The AD8417WHRMZ-RL has a fixed gain of 60 V/V. Both are bidirectional current-sense amplifiers intended for high-side or low-side current monitoring.
Is the AD8417WHRMZ-RL automotive qualified?
Yes. The AD8417WHRMZ-RL carries the "W" automotive designation and is qualified to AEC-Q100, making it suitable for automotive current-sensing applications. The AD8418ABRMZ is specified for industrial temperature ranges and is not presented as an AEC-Q100-qualified part.
What are the operating temperature ranges for these devices?
Both the AD8418ABRMZ and the AD8417WHRMZ-RL are specified over the −40°C to +125°C temperature range, per their manufacturer datasheets.
What package and packaging options are available?
Both devices are supplied in an 8-lead MSOP package. The AD8417WHRMZ-RL suffix "RL" indicates tape-and-reel packaging for automated assembly. The AD8418ABRMZ is supplied in the standard 8-lead MSOP tube or reel format per the manufacturer's ordering information.
Can the AD8418ABRMZ be used as a substitute for the AD8417WHRMZ-RL?
Not directly. Although both are bidirectional current-sense amplifiers in the same 8-lead MSOP package, the gain differs (20 V/V vs 60 V/V) and the AD8417WHRMZ-RL is AEC-Q100 automotive qualified while the AD8418ABRMZ is not. Substitution requires re-validating the gain, output scaling, and qualification requirements against the target design.
What are the typical applications for these current-sense amplifiers?
Both devices are intended for bidirectional current sensing in motor control, power management, solenoid and valve control, and battery monitoring applications. The AD8417WHRMZ-RL's AEC-Q100 qualification additionally targets automotive subsystems such as motor drivers and power distribution, while the AD8418ABRMZ targets industrial and general-purpose current-monitoring designs.