Part A
AD8361ARM
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6375 ПКС
- Package
- TSSOP-8
- Series
- RF детекторы
Replacement verdict
Compatible functional replacement candidate
The AD8361ARMZ is a functionally compatible replacement candidate for the AD8361ARM, as both parts share the same core RMS-responding detector architecture, package footprint, and supply requirements. The primary distinction is the RoHS-compliant Z-grade designation of the AD8361ARMZ, which should be validated against the specific assembly and compliance requirements of the target design before substitution.
Function and Topology
High match
Package and Pinout
High match
Supply Voltage Range
High match
RoHS Compliance
Validation required
Parts at a glance
Part B
AD8361ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6139 ПКС
- Package
- TSSOP-8
- Series
- RF детекторы
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8361ARMZ | AD8361ARM | Why it matters |
|---|---|---|---|
| Function | RMS-responding power detector (LF to 2.5 GHz TruPwr) | RMS-responding power detector (LF to 2.5 GHz TruPwr) | Confirms both parts perform the same core signal-detection function, so they are functionally interchangeable in the application. |
| Frequency Range | LF to 2.5 GHz | LF to 2.5 GHz | The operating bandwidth must cover the target signal band for the detector to work correctly. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail; identical range means the same supply can be used. |
| Supply Current | ~1.1 mA (typical) | ~1.1 mA (typical) | Affects power budget and thermal design; matching current draw supports drop-in substitution. |
| Output Type | Linear-in-dB (DC) voltage output | Linear-in-dB (DC) voltage output | The output format must match the downstream ADC or control loop for the part to be usable without redesign. |
| Package / Case | 8-Lead MSOP | 8-Lead MSOP | Identical package and pinout allow the parts to share the same PCB footprint and assembly process. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free (Z suffix) | Non-RoHS, contains lead | RoHS status affects regulatory compliance and solder process; the Z-suffix part is the environmentally compliant variant. |
| Part Number Suffix Meaning | "Z" denotes RoHS-compliant lead-free version | Base part without RoHS/lead-free designation | The suffix distinguishes the compliant from non-compliant variant, which is the primary difference between these two orderable parts. |
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 | AD8361ARM | AD8361ARMZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Frequency | 2.5GHz | 2.5GHz |
| RF Type | Cellular, CDMA, W-CDMA | Cellular, CDMA, W-CDMA |
| Input Range | 0 ~ 700mV | 0 ~ 700mV |
| Accuracy | ±0.25dB | ±0.25dB |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Supply Current | 1.1 mA | 1.1 mA |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AD8361ARMZ and the AD8361ARM?
The AD8361ARMZ and AD8361ARM are functionally identical RF true-power detectors from Analog Devices. The suffix difference is packaging/ordering related: the "Z" designation indicates RoHS-compliant lead-free (Pb-free) construction, while the non-Z AD8361ARM is the older lead-containing (Pb) version. Both are supplied in an 8-lead MSOP package and share the same electrical specifications.
Are the AD8361ARMZ and AD8361ARM electrically interchangeable?
Yes. Both devices are the same AD8361 true-power detector die with identical pinout, package (8-lead MSOP), supply range, frequency range, and transfer function. The only documented difference is the RoHS/lead-free status of the package finish, so they are electrically and functionally interchangeable in an existing design.
What is the operating frequency range of the AD8361?
The AD8361 is specified for operation from low frequency up to 2.5 GHz, making it suitable for RF power measurement in applications such as CDMA, W-CDMA, and other cellular/PCS systems. Designers should consult the manufacturer datasheet for the exact frequency-dependent accuracy and response curves.
What supply voltage does the AD8361 require?
The AD8361 operates from a single supply of 2.7 V to 5.5 V, with low power consumption. This wide supply range allows it to interface directly with common 3 V and 5 V system rails. Refer to the Analog Devices datasheet for exact quiescent current and supply-related specifications.
What output does the AD8361 provide?
The AD8361 provides a linear-in-dB (logarithmic) DC output voltage proportional to the RMS value of the input RF signal. It is a true RMS-responding detector, so it measures the actual power of complex modulated waveforms rather than just the peak. The output is typically buffered and can drive subsequent ADC or control circuitry.
Does the "Z" suffix affect the part's performance or specifications?
No. The "Z" suffix on AD8361ARMZ denotes RoHS compliance and lead-free (Pb-free) termination finish only. It does not change the electrical performance, accuracy, frequency response, or any datasheet parameter of the device compared with the non-Z AD8361ARM.
Which version should be selected for a new RoHS-compliant design?
For new designs requiring RoHS compliance, the AD8361ARMZ (Pb-free, RoHS-compliant) should be selected. The non-Z AD8361ARM contains lead in its termination finish and is generally not suitable for RoHS-restricted products. Both share the same datasheet specifications, so the choice is driven by compliance and availability rather than performance.