Part A
AD8361ARMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6139 PCS
- Package
- TSSOP-8
- Series
- RF Detectors
Replacement verdict
Not a drop-in replacement
The AD8367ARUZ-RL7 and AD8361ARMZ are not drop-in replacements for one another. The AD8367ARUZ-RL7 is a variable gain amplifier with analog gain control, while the AD8361ARMZ is a fixed-gain RMS-responding power detector; their core functions, gain control architecture, and output behavior differ fundamentally, so substitution requires circuit redesign and validation.
Different function class
Different gain control
Different output type
Different package footprint
Parts at a glance
Part B
AD8367ARUZ-RL7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5988 PCS
- Package
- TSSOP-14
- 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 | AD8367ARUZ-RL7 | AD8361ARMZ | Why it matters |
|---|---|---|---|
| Function | Variable gain amplifier (VGA) with integrated detector | RMS-responding power detector | These are fundamentally different device types, so they are not functionally substitutable in most designs. |
| Frequency range | LF to 500 MHz | LF to 2.5 GHz | The usable operating band determines whether the part fits the target signal chain. |
| Gain / conversion characteristic | Variable gain, approximately -2.5 dB to +42.5 dB | Fixed conversion gain, approximately 7.5 V/V | A VGA provides adjustable amplification, while a detector provides a fixed scaled output, so signal-chain behavior differs completely. |
| Output type | Amplified RF output plus logarithmic detector output | Linear DC voltage proportional to RMS input power | The output format must match the downstream circuit, whether it needs an RF signal or a baseband measurement voltage. |
| Supply voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both support common single-supply rails, so supply compatibility is not a differentiator here. |
| Package | 24-lead TSSOP | 8-lead MSOP | Different footprints and pin counts prevent direct board-level replacement. |
| Input impedance / interface | 200 ohm differential input | 50 ohm single-ended input | Matching impedance and interface topology is essential for proper signal coupling and performance. |
| Primary application | Receive/transmit gain control and AGC loops | RF power measurement and RMS detection | The intended application reveals that one part amplifies signals while the other measures them. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8361ARMZ | AD8367ARUZ-RL7 |
|---|---|---|
| Part Status | Active | Active |
| Frequency | 2.5GHz | - |
| RF Type | Cellular, CDMA, W-CDMA | - |
| Input Range | 0 ~ 700mV | - |
| Accuracy | ±0.25dB | - |
| Voltage - Supply | 2.7V ~ 5.5V | - |
| Supply Current | 1.1 mA | 26mA |
| Mounting Type | Surface Mount | Surface Mount |
| Series | - | X-AMP® |
| Amplifier Type | - | Variable Gain |
| Number of Circuits | - | 1 |
| -3 dB Bandwidth | - | 500 MHz |
| Current - Input Bias | - | 27 µA |
| Voltage - Supply Span(Min) | - | 2.7 V |
| Voltage - Supply Span(Max) | - | 5.5 V |
| Operating Temperature | - | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the AD8367ARUZ-RL7 and the AD8361ARMZ?
The AD8367ARUZ-RL7 is an analog-controlled variable gain amplifier (VGA) with a 500 MHz bandwidth and a linear-in-dB gain range of -2.5 dB to +42.5 dB. The AD8361ARMZ is an RMS-responding power detector (truPwr) with a 2.5 GHz input bandwidth, intended for measuring signal power rather than amplifying it. They serve fundamentally different signal-chain roles.
Are the AD8367ARUZ-RL7 and AD8361ARMZ pin-compatible or package-compatible?
No. The AD8367ARUZ-RL7 is supplied in a 14-lead TSSOP (RU-14) package, while the AD8361ARMZ is supplied in an 8-lead MSOP (RM-8) package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for one another.
What are the verified supply voltage and current requirements for each device?
The AD8367ARUZ-RL7 operates from a single 5 V supply and typically draws about 26 mA. The AD8361ARMZ operates from a single 2.7 V to 5.5 V supply and typically draws about 1.1 mA. The AD8361ARMZ is therefore suited to lower-power measurement applications, while the AD8367ARUZ-RL7 is a higher-current gain stage.
What frequency ranges do these two parts support?
The AD8367ARUZ-RL7 VGA is specified for operation up to 500 MHz. The AD8361ARMZ RMS power detector is specified for input frequencies up to 2.5 GHz. The detector therefore covers a much wider input frequency range, but it measures power rather than providing gain.
Can the AD8361ARMZ be used to measure the output of the AD8367ARUZ-RL7 in a leveling loop?
Yes, this is a common architecture: the AD8367ARUZ-RL7 provides variable gain, and the AD8361ARMZ can be used as the RMS detector in an automatic gain or power-leveling loop. The designer must verify the detector's input range, frequency of operation, and interface levels against the datasheets for the specific application.
What output format does each device provide?
The AD8367ARUZ-RL7 provides an amplified RF output with a gain set by an analog control voltage (linear-in-dB). The AD8361ARMZ provides a DC output voltage proportional to the RMS value of its input signal. The output types are therefore not interchangeable.
What are the operating temperature ranges for these parts?
Both the AD8367ARUZ-RL7 and the AD8361ARMZ are specified for the industrial temperature range of -40°C to +85°C, per their respective manufacturer datasheets.
Are these parts RoHS compliant and what does the suffix indicate?
Yes. The "Z" suffix in both AD8367ARUZ-RL7 and AD8361ARMZ denotes RoHS-compliant packaging per Analog Devices nomenclature. The "-RL7" suffix on the AD8367ARUZ-RL7 indicates tape-and-reel packaging in 7-inch reels; the AD8361ARMZ is supplied in standard tube or reel packaging as ordered.