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 and AD8361ARMZ are not drop-in replacements for one another. The AD8367ARUZ 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 interfaces, and output characteristics differ fundamentally, so substituting one for the other requires circuit redesign and validation.
Different core function
Different gain control
Different output type
Different package
Parts at a glance
Part B
AD8367ARUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1680 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 | AD8361ARMZ | Why it matters |
|---|---|---|---|
| Function | Variable gain amplifier (VGA) with AGC | RMS-responding power detector | These are fundamentally different functions; one amplifies with controllable gain while the other measures signal power, so they are not direct substitutes. |
| Frequency range | LF to 500 MHz | LF to 2.5 GHz | The usable operating bandwidth determines whether the part fits the target signal chain frequency. |
| Supply voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range affects compatibility with the system power rail; here both share the same range. |
| Gain / conversion characteristic | Variable gain, approx -2.5 dB to +42.5 dB | Linear-in-dB RF power detection, ~7.5 V/V slope | The transfer characteristic defines how the device responds to input, which is central to whether it can serve the same role. |
| Output type | Amplified RF/IF signal output | DC voltage proportional to input RMS power | One delivers an RF signal while the other delivers a baseband DC measurement, so their outputs are not interchangeable. |
| Package | 16-lead TSSOP | 8-lead MSOP | Package and pin count affect PCB footprint and layout compatibility for substitution. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment; both share the same industrial range. |
| Primary application | AGC amplifiers, gain control in receivers | RF power measurement, RSSI, transmitter power control | Intended application indicates the role each part plays, clarifying that they serve different circuit functions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8361ARMZ | AD8367ARUZ |
|---|---|---|
| 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 and the AD8361ARMZ?
The AD8367ARUZ is a 500 MHz, 45 dB linear-in-dB variable gain amplifier (VGA) with an integrated square-law detector, designed for receive signal chain automatic gain control. The AD8361ARMZ is a 2.5 GHz TruPwr RMS-responding power detector intended for RF power measurement and control. One is a gain-control amplifier; the other is an RMS power detector.
Do the AD8367ARUZ and AD8361ARMZ use the same package and pinout?
No. The AD8367ARUZ is supplied in a 14-lead TSSOP package, while the AD8361ARMZ is supplied in an 8-lead MSOP package. The package footprints, pin counts, and pin functions differ, so they are not pin-compatible or drop-in interchangeable.
What are the specified operating frequency ranges for these two parts?
The AD8367ARUZ is specified for operation from DC to 500 MHz. The AD8361ARMZ is specified for operation from DC to 2.5 GHz. The AD8361ARMZ therefore covers a substantially higher frequency range, consistent with its role as an RF RMS power detector.
How do the gain-control and detection functions differ between the AD8367ARUZ and AD8361ARMZ?
The AD8367ARUZ provides a linear-in-dB voltage-controlled gain range of 45 dB with an on-chip square-law detector for AGC loops. The AD8361ARMZ does not provide signal gain; it computes the RMS value of its input and outputs a corresponding DC voltage proportional to input power, making it a measurement device rather than an amplifier.
Can the AD8361ARMZ be used as a substitute for the AD8367ARUZ in an AGC loop?
No. The AD8361ARMZ is an RMS power detector without variable gain amplification, so it cannot perform the VGA function of the AD8367ARUZ. Substitution would require additional gain stages and loop design changes and must be validated against the manufacturer datasheets for the target application.
What supply voltage ranges are specified for the AD8367ARUZ and AD8361ARMZ?
The AD8367ARUZ operates from a single supply of 2.7 V to 5.5 V. The AD8361ARMZ operates from a single supply of 2.7 V to 5.5 V. Both parts are therefore compatible with common 3 V and 5 V system rails per their respective datasheets.
Which part is better suited for RF power measurement in a transmit chain?
The AD8361ARMZ is the appropriate choice for RF power measurement because it is an RMS-responding detector covering DC to 2.5 GHz with a DC output proportional to input RMS power. The AD8367ARUZ is optimized for receive-path variable gain and AGC, not for standalone transmit power measurement.